WO2013027754A1

WO2013027754A1 - Circular cutting device, circular cutting method, removal construction method for underground structure, and road-paving construction method

Info

Publication number: WO2013027754A1
Application number: PCT/JP2012/071157
Authority: WO
Inventors: 椿森　信一; 慎太郎椿森
Original assignee: Tsubakimori Shinichi; Tsubakimori Shintaro
Priority date: 2011-08-22
Filing date: 2012-08-22
Publication date: 2013-02-28
Also published as: TW201333302A; JP5368616B2; JP2013144918A

Abstract

　The present invention provides a circular cutting device, and a construction method which uses the cutting device to construct an underground structure whilst ensuring workability and the safety of workers, or similar, and achieving smooth removal. This circular cutting device, which comprises an operational cavity (36) and, on the inside section or the rear surface side of the cavity, a means which is to be engaged (30), and which is used for the circular cutting of an item to be cut, such as paving. Therein, a cutting bit (9) is supported in a rotatable and propellable manner on a central shaft (1), a shoe section (1a) and a pull-up rod (11), which penetrates the shoe section in an expandable and contractable manner, are provided on the central shaft (1), and an engaging means (20), capable of engaging with the means which is to be engaged (30) is provided on the end of the pull-up rod (11). The circular cutting of the item to be cut is carried out with the item to be cut compressed and held from both sides by the shoe section (1a) of the central shaft (1), pressed into an opening section in the operational cavity (36), and the engaging means (20) in the pull-up rod (11), engaged with the means which is to be engaged (30).

Description

Circular cutting device, circular cutting method, underground structure removal method and road pavement method

In the present invention, for example, in cutting overlay pavement construction, replacement pavement construction, new pavement construction, or height adjustment pavement construction of a manhole cover receiving frame, etc., the opening is closed on the manhole base wall installed underground. Like the temporary lid attached to the manhole or the manhole cover receiving frame installed on the base wall of the manhole via the height adjusting material, it is entirely buried under the road surface or partly exposed on the road surface. For example, a circular cutting device useful for efficiently removing an underground structure contained in pavement, a circular cutting method using the circular cutting device, an underground structure removing method, and the removing method It is related to the road pavement construction method.

As a method for removing the underground structure such as the temporary lid and the manhole cover receiving frame, for example, circular cutting that cuts the pavement including the underground structure into a required depth from the road surface around the cutting center axis. And a step of breaking and edging the peripheral fixed member in a state where the cut pavement plate of the circular structure-containing submerged structure is partially connected or in close contact with them, and the rupture and edging A construction method including a moving / removing process for moving and removing a cut pavement plate containing an underground structure is well known (for example, Japanese Utility Model Laid-Open No. 59-193679, Japanese Patent No. 2623491, Japanese Patent No. 3263355, Japanese Patent No. 3926429). etc).

However, in the conventional method of removing the underground structure, the circular cutting process, the breaking / edge cutting process and the moving / removing process are performed by a circular cutting device, a lifting device such as a jack, and a supporting moving means such as a boom of a crane car, respectively. As described above, it is necessary to secure and store each device individually even if it can be carried out in each process unit. Since operations such as transporting, installing, and removing each device are unavoidable, it has been difficult to continuously and smoothly implement the series of three steps.

In the conventional technology, in order to simplify the process and save labor, in many cases, after the circular cutting process, the breaking / edge cutting process and the moving / removing process are performed by a supporting moving means such as a boom of a crane truck. Although continuously carried out, especially in the breaking and edging process, when the cut pavement plate of the underground structure containing the circularly cut temporary lid and hole lid receiving frame is broken and rimmed from the peripheral fixing member Since an excessive load due to a large pulling reaction force is applied to the support moving means, the support moving means is likely to be broken or damaged, and the safety and workability of workers and the like are greatly hindered due to them. There was a fear. In order to alleviate the above problem, it is conceivable to reinforce and increase the size of the support moving means and the transporting vehicle that carries and transports the support moving means, but in that case, mobility, workability, economy This causes another difficult problem to solve in terms of sex.

Further, in the moving / removing step, the cut pavement plate of the submerged structure that has been circularly cut, broken, and trimmed is formed into a part of the subsurface structure by a support moving means such as a boom of a crane truck. Engage the engagement means consisting of an expansion wedge, an expansion anchor, a grip mechanism, a claw locking mechanism, etc. of the support moving means, lift it up, move it on the vehicle for transportation, etc. and remove it. However, in the engaging means as described above, since the support moving means cannot stably and reliably grip the cut pavement plate of the fractured and edge-cut underground structure inclusion, the underground structure inclusion While the cut pavement plate is lifted by the support moving means as described above, moved and removed, it is unstablely swayed, easily loses its balance and becomes unstable. Safety and workability are large There is a fear being harmed.

On the other hand, as a circular cutting device used in the circular cutting step in the underground structure removal method, for example, in the case of circular cutting of a pavement of an underground structure containing a cutting object, a central shaft and the central shaft A cutting bit disposed so as to be rotatable and propellable in the axial direction of the shaft, a support moving means for supporting and moving the central shaft and holding it in a required position, and cutting the cutting bit by the support moving means. A bit drive that rotates on the central shaft that is erected and held along the cutting center axis on the object and is propelled in the direction of the shaft axis, thereby cutting the cutting object in a circle around the cutting center axis And a cutting reaction force receiving means for receiving a rotational reaction force and a propulsion reaction force required for the circular cutting are well known. (E.g. Japanese Patent Publication No. 61-52283, Japanese Patent No. 3622838, etc.).

The cutting reaction force receiving means in the circular cutting device is configured to press and hold the lower end of the center shaft supported by the support moving means on the pavement along the cutting center axis by the pressing pressure of the support moving means. Or the structure etc. which engage and fix the lower end of the said center shaft to the said underground structure via some engagement means are employ | adopted. In some of the circular cutting devices, the lower end of the central shaft supported by the support moving means is engaged and fixed to the underground structure through the movement / removal step from the circular cutting step. (For example, Japanese Patent Publication No. 61-52283, Japanese Patent No. 2739629, Japanese Patent No. 3622838, etc.).

However, if the cutting reaction force receiving means is configured to press and hold the lower end of the center shaft on the pavement along the cutting center axis by the pressing force of the support moving means, the required rotational reaction force and propulsion are achieved. In order to receive the reaction force, the pressing pressure of the support moving means is held strong, and therefore the support moving means needs to be enlarged, and the lower end of the center shaft is only on one place from above on the pavement. Even if the support moving means is enlarged and the pressing pressure is increased, the center shaft is likely to be vibrated or shaken during the circular cutting, and the cutting groove width is reduced by the vibration or shake. While increasing, the cutting bit of the cutting bit, the supporting member of the cutting tip and the like are rapidly worn out, and there is a problem that the service life of the cutting bit is shortened.

Further, in the circular cutting device configured to engage and fix the lower end of the center shaft to the underground structure via the engaging means, the rotational reaction force and the propulsive reaction force at the time of circular cutting are transmitted via the engaging means. However, in this case as well, in this case as well, the lower end of the central shaft is engaged with the underground structure only at one point. Even if the engagement and fixation are strengthened, the cutting groove width increases due to the vibration of the center shaft and blurring, and the cutting bit of the cutting bit, the supporting member of the cutting tip, etc. It has been difficult to sufficiently suppress excessive wear and the like.

Further, in the circular cutting device configured to engage and fix the lower end of the central shaft to the underground structure via an engaging means, the cut pavement plate in which the lower end of the central shaft is circularly cut even after circular cutting. Since it is engaged and fixed to the underground structure included in the structure, the form from which the circular cutting process to the movement / removal process can be carried out continuously using the circular cutting apparatus is apparent.

However, in the above case, the lower end of the center shaft is engaged with the underground structure included in the circular cut cutting pavement plate in the breaking / edge cutting step and the moving / removing step after the circular cutting step. When the center shaft is forcibly pulled up by the supporting and moving means in a state of being engaged and fixed through the means, the cut pavement plate of the circular structure containing the underground structure is removed from the peripheral fixing member. Since an excessive load due to a large pulling reaction force is applied to the support moving means when it is ruptured or trimmed, the support moving means breaks down, breaks down, and the safety and workability of workers due to them, etc. The above-mentioned circular cutting device has difficulty in safely and reliably carrying out the breaking / edge cutting process.

In addition, as described above, the lower end of the center shaft is engaged and fixed to the underground structure contained in the circularly cut cutting pavement plate via the engaging means even after the breaking / edge cutting step. In the moving / removing step under a state of being left, the center shaft cannot stably and reliably grip the cut pavement plate of the underground structure inclusion, so that the cut pavement of the underground structure inclusion is cut. While the plate is lifted and transported together with the central shaft by the support moving means, the plate oscillates unstably, and tends to become unstable due to loss of balance, resulting in safety and workability for workers. There was a risk of being greatly disturbed.

Japanese Utility Model Publication No.59-193679 (manhole frame peeling machine) Japanese Patent No. 2623491 (Cutting Overlay Method) Patent No. 2739629 (Paving road surface excision device) Japanese Patent No. 3263355 (pavement method of road surface including manhole) Japanese Patent No. 3926429 (Method for removing underground buried object and apparatus used for the method) Japanese Examined Patent Publication No. 61-52283 (road surface cutting machine) Japanese Patent No. 3622838 (circular cutting device for road surface) Japanese Patent Application No. 2011-180651 (circular cutting device, circular cutting method, underground structure removal method and road pavement method)

In view of the above problems, the object of the present invention is to reliably obtain the rotational reaction force and propulsion reaction force required for circularly cutting the object to be cut in the circular cutting step, and thereby the center at the time of circular cutting. In the breaking and edging process after the circular cutting, the circular cutting is performed in order to prevent the shaft from vibrating and blurring, and to suppress the increase in the cutting groove width and the wear of the cutting tip of the cutting bit and the supporting member of the cutting tip. In order to break and trim the cut object to be cut from the peripheral fixing member, it is possible to reliably generate a required pulling force that does not depend on the support moving means, thereby preventing failure and breakage of the support moving means and working. To ensure the safety and workability of the person, etc., and in the movement / removal process after the breaking / edge cutting, the cutting object that has been circularly cut, broken, and edge-cut It can be gripped regularly and reliably, and can be lifted and transported while maintaining balance without unstable swinging, thereby ensuring the safety and workability of workers, etc. A further improved circular cutting device, a circular cutting method using the same, and an underground structure that can smoothly and smoothly perform a series of steps consisting of breaking, edge cutting and movement / removal with one type of device. Is to provide a method of removing the road and a road pavement method including it.

Note that further problems and features of the present invention will become apparent from the following detailed description and the accompanying drawings that support it.

[Circular cutting device]
The circular cutting device according to the present invention that solves the above-described problem is, as described in claim 1, a central shaft, and a cutting bit disposed on the central shaft so as to be rotatable and propellable in the axial direction of the shaft. A support moving means for supporting and moving the center shaft and holding it at a required position, and the center shaft in which the cutting bit is erected and held on the object to be cut along the cutting center axis by the support moving means. Bit driving means for rotating above and propelling in the axial direction of the shaft, thereby cutting the object to be cut in a circle around the cutting center axis, and cutting for receiving the required rotational reaction force and propulsion reaction force during the circular cutting A circular cutting device having at least a reaction force receiving means,
A pulling rod is provided on the central shaft so as to be extendable and contractable in the axial direction of the shaft, and an engaging means is provided at an end of the pulling rod, and a stone thrusting portion is extended and contracted at the end of the central shaft. It is characterized in that it can pass through and can generate a pinching pressure with the contracting means of the retracting pull-up rod.

In the circular cutting device according to claim 1, as described in claim 2, the pulling rod is provided on the central shaft coaxially with the main rod portion that is extendable in the axial direction of the shaft, It is preferable that the main rod portion is detachably connected to the shaft axial direction and includes an extension rod portion having the engaging means at an end portion.

The extension rod portion may be integrated, or comprises an engagement action portion including the engagement means, and an intermediate adjustment portion detachably connected to the engagement action portion. Also good.

In the latter case, the length of the entire extension rod portion is changed by changing the intermediate adjustment portion and / or the engagement operation portion, particularly the intermediate adjustment portion, constituting the extension rod portion to an appropriate length. The length of the entire pulling rod can be changed according to the depth of the operation cavity and other cutting conditions.

Moreover, in the said structure, the connecting position of the said intermediate adjustment part with respect to the said engaging action part in the rod axial direction may be changeable, In that case, the rod axial direction of the said intermediate adjusting part with respect to the said engaging action part By changing the connection position, the length of the whole extension rod part and the whole length of the pull-up rod can be changed according to the depth of the operating cavity and other cutting conditions.

As each connection means in the connection between the main rod portion and the extension rod portion, the connection between the main rod portion and the intermediate adjustment portion, and the connection between the intermediate adjustment portion and the engagement action portion, strength and connection A known mechanism may be appropriately adopted in consideration of workability and the like. These include, for example, a pin connection structure in which a pin is driven in a diametrical direction into a fitting portion of both members fitted on the same axis, or between both members abutted or fitted on a coaxial line in the axial direction. You may have the screw connection structure etc. which were screwed together by screw members, such as a volt | bolt.

Furthermore, in the circular cutting device according to

claim

1 or 2, as described in claim 3, a reaction force receiving frame having three or more legs adjustable in height is provided on the central shaft. It is preferable that the leg is disposed so as to surround the cutting bit so that the leg can come into contact with an outer area of the circular cutting.

Each of the legs may include, for example, an adjustment member including a coarse adjustment portion that changes the height stepwise and a fine adjustment portion that continuously changes the height within a narrow range. The adjusting member may include a fluid pressure cylinder such as a hydraulic pressure.

In the circular cutting device according to claim 3, as described in claim 4, the center shaft includes a main shaft portion, and a movable shaft portion provided on the main shaft portion so as to be extendable and contractible in the shaft axial direction. The main shaft portion is provided with the reaction force receiving frame, and the movable shaft portion is provided with the cutting bit so as to be rotatable and propellable in the axial direction of the shaft, and the pulling rod extends and contracts in the axial direction of the shaft. It may be provided.

The drive sources of the support moving means and the bit drive means in the circular cutting device, and the drive sources for expanding and contracting the pulling rod and the movable shaft portion are not limited, and any of, for example, hydraulic pressure, pneumatic pressure, electric power, etc. It may be. Further, as the cutting bit, a well-known one in which a cutting tip such as a diamond tip is attached around the lower end of the cylindrical body portion is preferably used. If there is, it is not limited to the cut bit of the said form.

Further, in the circular cutting device having the above-described configuration, it is possible to use this as a conventional single-function circular cutting device by disabling the function of the pulling rod as necessary.
The features and operational effects of the configuration of the circular cutting device according to claims 1 to 4 are as follows: a circular cutting method using the circular cutting device, an underground structure removal method, and a road including the removal method It will be clarified in the explanation of the pavement method.

[Circular cutting method using circular cutting device]
The said circular cutting device can be used suitably for the circular cutting method of cutting objects, such as pavement which includes an underground structure, for example.
That is, as described in claim 5, the circular cutting method uses the circular cutting device according to any one of claims 1 to 4 and has an operation cavity along a cutting center axis, A method of cutting a cutting object provided with an engaged means in a circular shape inside an operation cavity or an arbitrary portion passing through the inside,
The operation of inserting the pulling rod into the operation cavity and engaging the engaging means of the pulling rod with the engaged member, simultaneously with any preceding operation, or before or after the operation, An operation of providing a stone thrust retainer in the opening of the operation cavity so that the pulling rod can be inserted and receiving and retaining the stone thrust section; and a stone thrust section of the central shaft, The pulling rod is contracted with respect to the central shaft in a state where the engaged means is engaged with the engaging means, The cutting object is clamped and gripped from both sides by the stone thrusting portion of the central shaft and the engaging means of the pulling rod, and the cutting bit is moved by the bit driving means under the state. And spun onto the shaft propelled to the shaft axial direction, it is thereby made of the operation of cutting the circular to the required depth the cutting object from the road surface.
In the circular cutting of the cutting object, as described above, the cutting object is sandwiched and gripped from both sides by the stone thrust portion of the center shaft and the engaging means of the pulling rod, In other words, the center shaft supported by the support moving means is firmly fixed and integrated with the object to be cut by the clamping and gripping with the pulling rod, and the center shaft stone is The cutting object is circularly cut by the cutting bit while the required rotational reaction force and propulsion reaction force are applied to the cutting object via the protrusion and the pulling rod engaging means.

In circular cutting of the object to be cut, an operation for inserting the pulling rod into the operation cavity of the object to be cut, and an object disposed in the inside of the operation cavity or at any part passing through the inside. When positioning in an operation of engaging the engaging means of the pulling rod with the engaging means, an image taken by a camera device provided at the end of the pulling rod is referred to on the display device as necessary. May be. In the above case, a camera device for photographing the front part of the pulling rod and an illumination device for photographing are provided at the end of the pulling rod, and an image photographed by the camera device is transmitted to the display device.

The engaging means provided at the end of the pull-up rod includes an engaged means arranged in advance in the inside of the operating cavity or an arbitrary portion passing through the inside, and access via the operating cavity. Are appropriately selected to have shapes, structures, and sizes that can be engaged. The engaging means includes, for example, a variable member constituting the engaging means in a radial direction or the like with respect to the rod axis by a hydraulic pressure, a pneumatic pressure, an electric power, a mechanical mechanism, gravity, a manual mechanism or a mechanism in which these are appropriately combined. It may be adapted to engage with the engaged means by being expanded or operated around a rod axis.

On the other hand, the engaged means arranged at the inside of the operation cavity in the cutting object or an arbitrary portion passing through the inside can be engaged with the engaging means in the manner described above, Those having a structure and a size are appropriately selected. For example, they can be attached, stacked, adhered, screwed, fitted, or incorporated into the inside of the operation cavity or an arbitrary part of the operation cavity itself. It may be a member arranged in various modes such as driving, press-fitting and the like.

As an engagement mode between the engaging means and the engaged means, it is necessary that the engaging means is closely locked to the engaged means at least when the pulling rod is contracted or pulled up. It is.

In addition, the stone thrusting portion provided at the end of the central shaft is pressed and held at the opening of the operation cavity when the object to be cut is circularly cut by a circular cutting device or in a later step to be described later. In that case, in order to obtain more stable pressing and holding in that case, an appropriate stone thrusting holder is usually interposed between the stone thrusting part and the opening of the operation cavity. The

In the inside area of the circular cutting, the stone thrust retainer is formed in the opening of the operation cavity in the cutting object, for example, in the form of lid, bridge, covering, plugging, etc., so as not to inhibit the circular cutting, That is, it is provided so as not to come out of the outer region of the circular cutting. As the stone thrust retainer, a shape, structure, size or the like corresponding to the shape, structure, size, etc. of the stone thrust portion of the central shaft and the opening of the object to be cut is selected. A base installed in the above-described manner in the opening of the operation cavity, a receiving unit provided on the base and pressing and holding the stone thrusting unit, and the base and the receiving unit It is possible to suitably employ an operation hole including an operation hole penetrating so as to communicate with the operation cavity so that the pull-up rod can be inserted.

In the circular cutting method using the circular cutting device according to

claim

3 or 4, as described in claim 6, when the circular cutting of the object to be cut is performed, the reaction force receiving frame is operated as necessary. May be.

That is, using the circular cutting device according to

claim

3 or 4, the device has an operation cavity along the cutting center axis, and is engaged with any part of the operation cavity inside or passing through the operation cavity. A method of cutting a cutting object having means into a circle,
The operation of inserting the pulling rod into the operation cavity and engaging the engaging means of the pulling rod with the engaged member, simultaneously with any preceding operation, or before or after the operation, An operation of providing a stone thrust retainer in the opening of the operation cavity so that the pulling rod can be inserted and receiving and retaining the stone thrust section; and a stone thrust section of the central shaft, The pulling rod is contracted with respect to the central shaft in a state where the engaged means is engaged with the engaging means, The cutting object is clamped and gripped from both sides by the stone thrusting part of the central shaft and the engaging means of the pulling rod, and each leg part of the reaction force receiving frame is circular in the cutting object. Cutting Under the above condition, the cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft under the above state, and thereby the cutting object is brought to the required depth from the road surface. And the operation of cutting into a circle.

In the circular cutting method using the circular cutting device according to claim 2 or claim 2 dependent on claim 2, the pulling rod is inserted into the operating cavity and the pulling rod is engaged. When engaging the means with the engaged means, start with the extension rod portion separated from the main rod portion without connecting the main rod portion and the extension rod portion constituting the pulling rod from the beginning, It is possible to finally operate to connect the two.
That is, as described in claim 7, the circular cutting method is operated along the cutting center axis using the circular cutting device according to claim 3 or claim 4 dependent on claim 2 or claim 2. A method of cutting a cutting object having an engagement means in a circular shape inside the operation cavity or at any part passing through the operation cavity,
A first operation in which the extension rod portion separated from the main rod portion of the pull-up rod is inserted into the operation cavity and the engaging means of the extension rod portion is engaged with the engaged means, and subsequently the pull-up By the second operation of connecting the main rod portion of the rod to the extension rod portion inside and / or outside of the operating cavity, the pulling rod is inserted into the operating cavity and the pulling rod is engaged. At the same time as any of the preceding operations, or before or after any of the operations for engaging the means with the engaged means, the lifting rod is inserted into the opening of the operating cavity. The operation of providing the stone thrusting portion so as to be able to receive and hold the stone thrusting portion, and the operation of pressing the stone thrusting portion of the central shaft to the opening of the operation cavity through the stone thrusting retainer. The pulling rod is contracted with respect to the center shaft in a state where the engaged means is engaged with the engaging means, whereby the object to be cut is pulled up with the stone thrusting portion of the center shaft and the pulling-up portion. Under the above condition, the cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft, and thereby the object to be cut is operated. And an operation of cutting an object in a circular shape from the road surface to a required depth.

Also in the case of the circular cutting method, in the circular cutting of the object to be cut, as in the circular cutting method according to claim 5, the cutting object has a relationship between the stone thrust portion of the central shaft and the pulling rod. In other words, the central shaft supported by the support moving means is firmly attached to the object to be cut by the clamping pressure and gripping with the pulling rod. The cutting bit while taking the required rotational reaction force and propulsion reaction force on the object to be cut via the stone thrust part of the center shaft and the engaging means of the pulling rod under the state of being fixed to and integrated with the cutting bit Circular cutting of the object to be cut is performed.

In the circular cutting of the cutting object, as a first operation, a short and light extension rod part separated from the main rod part of the pulling rod is inserted into the operation cavity of the cutting object and the extension is performed. The engaging means of the rod part is engaged with the engaged means, and then, as a second operation, the main rod part of the pulling rod is connected to the extension rod part to complete the entire pulling rod. Yes.

In the case where the extension rod portion further includes an engagement action portion including the engagement means and an intermediate adjustment portion detachably connected to the engagement action portion, for example, the first operation And the second operation may be performed in a state where the engaging action part and the intermediate adjusting part are connected from the beginning, or the first operation is performed using only the engaging action part. Later, in the second operation, the engaging action portion may be connected to the main rod portion via the intermediate adjusting portion.

When the extension rod portion is connected to the main rod portion of the pull-up rod, for example, as described above, when a large space for connection work such as driving a pin is required around the connection portion, When it is necessary to be performed outside the operation cavity, and when a large space for connection work such as screw tightening is not necessarily required around the connection portion, such as a screw connection structure, the inside of the operation cavity Alternatively, it may be performed near the boundary between the inside and the outside.

In the circular cutting method according to a seventh aspect, as in the eighth aspect, the extension rod portion is completely accommodated in the operation cavity by the selection of the length during the first operation. From the end of the first operation to the start of the second operation, the opening of the operation cavity may be temporarily covered, for example, for opening traffic.

In the circular cutting method according to claim 8, as described above, the extension rod portion is detachably connected to the engagement action portion including the engagement means and the engagement action portion. In the case where the intermediate adjustment unit is configured, for example, both the first operation and the second operation are performed in a state in which the engagement operation unit and the intermediate adjustment unit are connected from the beginning. Between the end of the operation and the start of the second operation, the opening of the operation cavity is a state in which the engaging action part and the intermediate adjustment part connected thereto are completely accommodated in the operation cavity. May be temporarily covered. Alternatively, after the first operation is performed using only the engagement action part, the engagement action part is connected to the main rod part via the intermediate adjustment part in the second operation. From the end of the first operation to the start of the second operation, the opening of the operation cavity is temporarily applied in a state where the engaging action portion is completely accommodated in the operation cavity. It may be covered.

As described above, when the extension rod portion is configured by an engagement action portion including the engagement means and an intermediate adjustment portion that is detachably connected to the engagement action portion, For example, in the first operation, the first operation is performed in a state in which the engaging action portion and the intermediate adjustment portion are connected from the beginning, and the first operation is completely accommodated in the operation cavity. The intermediate adjustment portion connected to the engagement operation portion may be connected to the main rod portion in the second operation, or the engagement operation portion may be connected to the intermediate operation portion. The first operation is performed in a state separated from the adjustment unit, and is completely stored in the operation cavity and covered until the start of the second operation. Is connected to the main rod part through the intermediate adjusting part. It may be.

In addition, as described above, the pull-up rod is composed of a main rod portion and an extension rod portion, and after the engagement between the engagement means of the extension rod portion and the engaged means in the first operation, the extension rod portion When the second operation connected to the main rod portion of the pull-up rod is performed, the extension rod portion is connected to the engagement means and the engagement member in order to facilitate the operations of the first operation and the second operation. After the engaging operation with the engaged means, it is preferable that the rod shaft is held in a certain range in the engaged state in the engaged state.

In order to realize the engagement state as described above, for example, as described in claim 9, in the circular cutting method according to

claim

7 or 8, the engagement means includes An engagement piece provided at the end portion so as to be expandable in the radial direction; and a stopper portion bulged in the radial direction at a position spaced apart from the engagement piece in the rod axis direction on the extension rod portion, Engagement hole in which engaged means engaged with the engaging means are limited so as to penetrate the end portion of the extension rod portion only when the engagement piece is contracted and not penetrate the stopper portion When engaging the engaging means and the engaged means, the engaging piece may be expanded after the end of the extension rod portion is passed through the engaging hole.

The expansion of the engaging piece may be performed by, for example, hydraulic pressure, pneumatic pressure, electric power, mechanical mechanism, gravity, manual operation, or a mechanism obtained by appropriately combining them.

In order to realize another aspect of the engagement state as described above, for example, as described in claim 10, in the circular cutting method according to

claim

7 or 8, the engagement means includes the An engagement piece projecting radially at an end of the extension rod part, a stopper part bulging radially in the extension rod part at a position spaced apart from the engagement piece in the rod axis direction, and the extension The rod portion is provided on the side opposite to the engagement piece with respect to the stopper portion so as to be non-rotatable and movable in the rod axis direction within a range not exceeding the stopper portion. A floating part adapted to receive a biasing force in the direction of the engagement piece when arranged below the stopper part, and the stopper part at a different angular position from the engagement piece, Not to interfere The locking rod provided along the rod axial direction, and on the other hand, the engaged means engaged with the engaging means has an expansion hole through which the engaging piece penetrates, and the extension rod portion The extension rod includes an engagement hole that is restricted so as to pass through the end of the stopper including the engaging piece and not through the stopper portion, and the extension rod is engaged when the engaging means and the engaged means are engaged. The engagement piece is rotated with respect to the engagement hole after the end of the portion including the engagement piece is passed through the engagement hole, and the engagement piece is different from the expansion hole of the engagement hole. The locking piece may be automatically fitted into the expansion hole of the engagement hole by the biasing force while being arranged at an angular position.

As described above, in the state in which the locking piece is fitted in the expansion hole of the engagement hole, the extension rod portion is prevented from rotating with respect to the engagement hole. Thus, the engagement piece is disposed at the same angular position as the expansion hole of the engagement hole, and at the same time, the engagement between the engagement piece and the engagement hole cannot be released.

[Removal method of underground structure using a circular cutting device]
The circular cutting device has, for example, an opening on a manhole base wall installed in the basement in cutting overlay pavement construction, replacement pavement construction, new pavement construction, or height adjustment pavement construction of a manhole cover receiving frame. Like a temporary lid attached to be closed or a human hole cover receiving frame installed on the base wall of the human hole via a height adjusting material, it is entirely buried under the road surface or part of it is on the road surface. It can be suitably used for a method for removing underground structures such as exposing the underground structures contained in the pavement efficiently.

In a preferred embodiment of the underground structure removal method, as described in claim 11, the underground structure is included, and an operation cavity is provided along the cutting center axis, and the interior of the operation cavity is included. Alternatively, a circular cutting step of circularly cutting a pavement having an engaged means at an arbitrary portion passing through the interior from the road surface to a required depth around the cutting center axis, and the circularly cut underground structure Underground structure consisting of a break / edge cutting process for breaking and edging an internal cutting pavement plate from peripheral fixing members, and a moving / removal process for moving and removing the cut pavement plate of the above-mentioned broken and edged underground structure inclusion A method of removing objects,
The circular cutting device according to

claim

3 or 4 is used in each of a series of steps from the circular cutting step to the movement / removal step through the breaking / edge cutting step,
In the circular cutting step, the pulling rod is inserted into the operation cavity and the engaging means of the pulling rod is engaged with the engaged means, simultaneously with any preceding operation or Before or after the operation, an operation of providing the stone thrust retainer at the opening of the operation cavity so that the lifting rod can be inserted and the stone thrust portion can be received and retained, and the stone thrusting portion of the central shaft Is pressed and held at the opening of the operation cavity via the stone thrust holder, and the pulling rod is engaged with the engaged means with the engaged means on the central shaft. Contracting, thereby causing the pavement of the underground structure inclusion to be clamped and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod, and under the state, Cut off Bit the center is rotated on the shaft and propelled to the shaft axial direction by the bit driving means, said operation and the pavement of underground structures included cutting the circular to the required depth from the road surface is at least carried out by it,
In the breaking / edge cutting step, the cutting bit is lifted and the circularly-cut underground structure inclusion is cut off from the cut paving plate, and the engaging means is engaged with the engaged means, An operation of securing the retractable stroke of the pulling rod by moving the stone thrusting part upward from the stone thrusting holder by a required distance, and applying each leg of the reaction force receiving frame to the outer area of the circular cutting. Under the above condition, the pulling rod is urged in the contraction direction with respect to the central shaft via the reaction force receiving frame, and the cutting paving plate of the underground structure inclusion is pulled up, At least an operation of breaking and trimming the fixing member is performed,
In the moving / removing step, the stone thrusting portion of the central shaft is pressed and held by the opening of the operation cavity via the stone thrusting retainer, and the pulling rod is held by the engagement means on the cover. With the engaging means engaged, the center shaft is shrunk to thereby cut the cut and paved plate of the submerged structure embedded in the ground shaft. An operation of clamping and gripping from both sides with the engaging means, and an operation of moving the center shaft to a required position by the support moving means and removing the cut paving plate of the underground structure in the state. It is characterized by being implemented at least.

According to the method for removing an underground structure having the above-described structure, as described above, in the circular cutting step, the pavement of the underground structure-containing pavement is engaged with the stone thrust portion of the central shaft and the pulling rod. In other words, the central shaft supported by the support moving means is clamped and gripped from both sides by means of the pulling rod and gripped by the pulling rod. Rotation reaction force and propulsion reaction force required for pavement of the underground structure-containing pavement through the means for engaging the central shaft and the pulling rod in a state of being firmly fixed and integrated with the pavement. In this way, circular cutting of the pavement of the underground structure inclusion is performed.

In the circular cutting step, if necessary, in order to further stabilize the central shaft, each leg portion of the reaction force receiving frame is brought into contact with the outer region of the circular cutting to receive the reaction force. The frame may be activated.

In addition, when using the circular cutting device according to

claim

3 or 4 subordinate to claim 2 or claim 2 in the method for removing the underground structure, as described above, in the circular cutting step, When the pulling rod is inserted into the operating cavity and the engaging means of the pulling rod is engaged with the engaged means, as described above, the main rod portion constituting the pulling rod, It is also possible to start with the extension rod part separated from the main rod part without connecting the extension rod part from the beginning, and finally operate to connect them. That is, in the above case, as a first operation, a short and light extension rod portion separated from the main rod portion of the pulling rod is inserted into the operation cavity and the engaging means of the extension rod portion is engaged. Then, the main rod portion of the pulling rod is connected to the extension rod portion to complete the pulling rod as a second operation.

Further, as described above, when the extension rod portion includes an engagement action portion including the engagement means and an intermediate adjustment portion detachably connected to the engagement action portion, Both the first operation and the second operation may be performed in a state in which the engagement operation unit and the intermediate adjustment unit are connected from the beginning, or the first operation is performed using only the engagement operation unit. After the execution, in the second operation, the engaging action part may be connected to the main rod part via the intermediate adjusting part.

In the breaking / edge cutting step, the retractable stroke of the pull-up rod is made by separating the stone thrusting part upward from the stone thrusting holder by a required distance while engaging the engaging means with the engaged means. The pulling rod contracts with respect to the central shaft while taking the required pulling reaction force on the road surface of the outer region of the circular cutting of the outer region of the circular cutting through the reaction force receiving frame under the state of securing the pulling rod. By this, the cut pavement plate of the underground structure inclusion is pulled up integrally, and the peripheral fixing member is broken and edge cut.

Immediately after the circular cutting step, the cut pavement plate of the underground structure contained in the circular cut was sandwiched and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod. Is in a state. The retractable stroke of the pulling rod in the breaking / edge cutting step is ensured by engaging the pulling rod with a required distance with respect to the central shaft while engaging the engaging member with the engaged member in the state. This is because the shredded pavement plate of the submerged structure included in the circular cut can be pulled up for breakage and edge cutting from the peripheral fixing member. In the breaking / edge cutting step, other breaking / edge cutting means may be used in combination as necessary.

As an operation for ensuring the retractable stroke of the pulling rod, for example, the pulling rod is advanced by a required length with respect to the central shaft, and the central shaft is raised integrally with the pulling rod, etc. The pulling rod may be advanced relative to the central shaft while engaging the engaging means with the engaged means, or in the circular cutting step, the opening of the operating cavity A spacer having a required thickness may be detachably provided between the two members when the stone thrust retainer is provided in a portion, and the spacer may be removed when securing the contractible stroke.

Next, in the moving / removing step, the cut and paved slab of the submerged underground structure is clamped and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod. Under the condition, the cut and paved plate of the underground structure inclusion is moved to or removed from the vehicle carrier or the like by lifting and moving the central shaft by the support moving means.

The function of moving the cut and paved slab of the submerged structure contained in the ground structure by the circular cutting device under the clamping and holding state is not limited to the use for the purpose. It can also be used depending on the situation for the movement of equipment, materials, etc. that can occur with or without it.

According to the circular cutting device, while the engaging means is engaged with the engaged means, the center shaft is moved by the support moving means without the pinching and gripping, and the underground structure Although it is not impossible to move and remove the cut pavement plate of the inclusion, such a movement and removal method is performed under the unstable gripping of the cut pavement plate of the underground structure inclusion as described above. The operational effect by the clamping and gripping as described above cannot be obtained as in the conventional method.

In the breaking and edging process in the underground structure removal method, the cut pavement plate of the circularly cut underground structure includes the pulling rod having a contractible stroke as described above. As an alternative to the operation of contracting the shaft and thereby breaking and cutting the peripheral fixing member, for example, after the circular cutting step, the cut pavement plate of the underground structure containing the circular cut is the center. Each leg portion of the reaction force receiving frame is rounded in a state in which it is clamped and gripped from both sides by the stone thrusting portion of the shaft and the engaging means of the pulling rod, and the support moving means is allowed to be displaced upward. Forcibly jacking up the required distance by a separate jack device in the outer area of the cutting, and thereby the cutting pavement plate of the underground structure inclusion is peripherally fixed From the break, there is also possible to divorce.

Further, as a preferable alternative method different from the above, using the circular cutting device according to claim 4, after the circular cutting step, the movable shaft portion of the central shaft is contracted with respect to the main shaft portion, As a result, the cut pavement plate of the underground structure contained in the circular cut can be broken and edge-cut from the peripheral fixing member.

That is, in another preferred embodiment of the underground structure removal method, as described in claim 12, the underground structure is included and an operation cavity is provided along the cutting center axis, and the operation A circular cutting step in which a pavement provided with an engagement means at an arbitrary part passing through the interior of the cavity for use is circularly cut from the road surface to a required depth around the cutting center axis, and the circular cutting is performed. Breaking and edging process of cutting and cutting edge of the pavement plate containing underground structure from peripheral fixing members, and moving and removing process of moving and removing the cut and pavement plate of underground structure inclusion cut and broken. A method for removing underground structures,
The circular cutting device according to claim 4 is used in each of a series of steps from the circular cutting step to the movement / removal step through the breaking / edge cutting step,
In the circular cutting step, the pulling rod is inserted into the operation cavity and the engaging means of the pulling rod is engaged with the engaged means, simultaneously with any preceding operation or Before or after the operation, an operation of providing the stone thrust retainer at the opening of the operation cavity so that the lifting rod can be inserted and the stone thrust portion can be received and retained, and the stone thrusting portion of the central shaft Is pressed and held at the opening of the operation cavity via the stone thrust holder, and the pulling rod is engaged with the engaged means with the engaged means on the central shaft. Contracting, thereby causing the pavement of the underground structure inclusion to be clamped and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod, and under the state, Cut off Bit the center is rotated on the shaft and propelled to the shaft axial direction by the bit driving means, said operation and the pavement of underground structures included cutting the circular to the required depth from the road surface is at least carried out by it,
In the breaking and edging step, the cutting bit is raised and the circularly-cut underground structure inclusion is separated from the cut paving plate, and each leg portion of the reaction force receiving frame is outside the circular cutting area. An operation of abutting on the center shaft and pressing and holding the stone thrusting portion of the central shaft to the opening of the operation cavity via the stone thrusting retainer, and the pulling rod to the engagement means. With the engaging means engaged, the center shaft is shrunk to thereby cut the cut and paved plate of the submerged structure embedded in the ground shaft. The movable shaft portion of the central shaft is urged in the contracting direction with respect to the main shaft portion via the reaction force receiving frame under a state of being clamped and gripped from both sides by the engaging means, Raising the cutting pavement middle structure containing, breaking from the peripheral stationary member, and the operation of edge cutting at least performed,
In the moving / removing step, the stone thrusting portion of the central shaft is pressed and held by the opening of the operation cavity via the stone thrusting retainer, and the pulling rod is held by the engagement means on the cover. With the engaging means engaged, the center shaft is shrunk to thereby cut the cut and paved plate of the submerged structure embedded in the ground shaft. At least an operation of moving the center shaft to a required position by the support moving means and removing the cut paving plate of the underground structure is carried out in a state of being clamped and gripped from both sides by the engaging means. It is characterized by being.

The circular cutting step and the moving / removing step in the series of steps from the circular cutting step to the moving / removing step through the breaking / edge cutting step in the underground structure removing method are described in claim 11. This is basically the same as the above-mentioned method for removing the underground structure, and both are different in the breaking / edge cutting process.

In the breaking and edging step in the underground structure removal method according to claim 12, after the preceding circular cutting step, the cut pavement plate of the circularly-cut underground structure inclusion is a stone thrust of the central shaft. The movable shaft portion of the center shaft is moved to the main shaft portion through the reaction force receiving frame by a required distance under a state in which the portion and the pulling rod engaging means are clamped and gripped from both sides. That is, at least a distance that can cause breakage and edge cutting is contracted, whereby the cut pavement plate of the underground structure that has been circularly cut is broken and edged from the peripheral fixing member. In the above case, the retractable stroke of the movable shaft portion with respect to the main shaft portion is secured in advance prior to the breaking / edge cutting step.

[Removal method of underground structure consisting of temporary lids]
The above-mentioned underground structure removal method is, for example, a manhole base wall installed in the basement in cutting overlay pavement construction, replacement pavement construction or new pavement construction or pavement construction for adjusting the height of the manhole cover frame, etc. It is suitably applied to a method of efficiently removing underground structures buried under the road surface and embedded in the pavement, such as temporary lids mounted on the top to close the opening. The

That is, the underground structure removal method comprising the temporary lid is the underground structure removal method according to claim 11 or 12, wherein the underground structure is underground. A temporary lid with an engagement hole that is mounted on the base wall of the human hole installed at the top of the manhole so as to close the opening, and pavement is constructed above and around and buried under the road surface. An engagement hole of the temporary lid is used as an engaged means that can be engaged with an engagement means of the pulling rod. In the circular cutting step, the temporary lid is paved along the cutting center axis along the paving of the temporary lid inclusion. A guide hole communicating with the engaging hole is previously drilled as an operation cavity into which the pulling rod can be inserted.

In the circular cutting step in the underground structure removal method, the pulling rod is inserted into a guide hole previously drilled along the cutting center axis in the paving of the temporary lid inclusion as an operation cavity, The operation of engaging the engaging means of the pulling rod with the engaging hole of the temporary lid as the engaged means, and at the same time as any preceding operation or before or after the operation, The operation of providing the pulling rod through the opening of the guide hole so that the lifting rod can be inserted and receiving and holding the stone thrusting portion, and the stone thrusting portion of the center shaft being held at the opening of the guide hole. The pulling rod is contracted with respect to the central shaft in a state where the engaging rod is engaged with the engaging hole of the temporary lid as the engaged means. By the temporary lid Under the above condition, the cutting bit is placed on the central shaft by the bit driving means, while the pavement of the package is clamped and gripped from both sides by the stone protrusion of the central shaft and the engaging means of the pulling rod. The operation of rotating and propelling in the axial direction of the shaft, thereby cutting the pavement of the temporary lid inclusion into a required depth from the road surface is performed.

When the pulling rod is composed of the main rod portion and the extension rod portion as described above, the pulling rod is inserted into the guide hole as the operation cavity, and the engaging means for the pulling rod is provided. When engaging with the engagement hole of the temporary lid as the engaged means, if necessary, the extension rod portion separated from the main rod portion of the pulling rod is inserted into the guide hole and the extension rod portion A first operation of engaging the engaging means with the engaging hole of the temporary lid, and subsequently connecting the main rod portion of the pulling rod to the extension rod portion inside and / or outside the guide hole. A second operation is performed.

In the removal method, in the circular cutting step, as described above, the guide hole communicating with the engagement hole of the temporary lid is used as an operation cavity in the paving of the temporary lid, along the cutting center axis. Then, the diameter of the pulling rod is made, for example, about 100 to 150 mm by a punching machine so that the pulling rod can be inserted.

In order to drill the guide hole on the pavement of the temporary lid inclusion, it is necessary to position the cutting center corresponding to the engagement hole of the temporary lid that is buried under the road surface in an invisible state. . As the positioning method, a well-known and publicly known technique can be employed. For example, when the temporary lid is exposed before paving, the coordinates of the virtual cutting center passing through the engagement hole of the temporary lid are offset surveying methods. It is possible to suitably employ a known method that is recorded in advance by other surveying methods and that the coordinates of the virtual cutting center are reproduced on the paved road surface when the guide hole is drilled.

Further, the engagement hole of the temporary lid buried under the road surface is usually a closing mechanism that can be opened afterwards so that the paving material covering the temporary cover after installation does not enter the engagement hole, for example, waterproofing. It is temporarily sealed with a closing member such as paper, cloth tape, or a plastic lid. For example, the closing member may be broken open by the core drill or the like of the drilling machine simultaneously with the drilling of the guide hole by the drilling machine or the like. May be opened by breakage opening, peeling removal, cutting removal or dropping down below the guide hole, etc. by the tool, or the closing member is in close contact with and engaged with the pavement core extracted along with the drilling of the guide hole Alternatively, it may be integrated and removed by fitting or the like, or after the guide hole is drilled, the engaging means of the extension rod portion inserted through the guide hole is engaged with the engagement hole of the temporary lid At the same time, the closing member may be opened by breaking open or dropping down below the guide hole, or a slit is provided in advance so that the closing member can be expanded and opened by pressing. The guide hole After the installation, the engaging means of the extension rod portion inserted through the guide hole is engaged with the engagement hole of the temporary lid, and at the same time, the closing member is expanded, opened and opened by the insertion of the pulling rod. Good.

Following the circular cutting step in the method for removing the underground structure, the cut paving plate of the temporary lid containing the circular cut is broken from a peripheral fixing member, a rupture and edging step for edging, and the rupture, The movement / removal process for moving and removing the cut pavement plate of the temporary lid containing the marginal cut is performed according to the corresponding processes in the underground structure removal method as described above.

The temporary lid is, for example, a base plate portion that is mounted on the base wall of the human hole so as to close the opening, and a stacking unit that is detachably fixed to the base plate portion by a coupling means so as to have a required thickness. A multi-layer temporary lid comprising one or a plurality of adjustment plate portions and an engagement hole drilled through the substrate portion and the adjustment plate portion in the center, and the engagement hole of the substrate portion May be used as an engaged means that can be engaged with the engaging means, and the engaging hole of the adjusting plate portion may constitute a part of the operating cavity.

When the multi-layer temporary lid is used as a temporary lid, the paving for temporary restoration covering the adjustment plate portion by selecting the thickness of the adjustment plate portion is more suitable than the conventional temporary lid. Since the work is thinned by the thickness of the plate part, saving of pavement materials and reduction of man-hours for pavement construction have been achieved, but the depth of circular cutting is reduced when removing the multi-layer temporary lid. It is possible to reduce the number of man-hours for cutting and cutting work, reduce the wear of cutting bits, and reduce the amount of cutting waste.

[Removal method of underground structure consisting of manhole cover frame]
The above-mentioned underground structure removal method is, for example, a manhole base wall installed in the basement in cutting overlay pavement construction, replacement pavement construction or new pavement construction or pavement construction for adjusting the height of the manhole cover frame, etc. Suitable for construction methods that efficiently remove underground structures partially exposed on the road surface and embedded in pavement, such as a manhole cover receiving frame installed on the top through a height adjustment material layer Is done.

That is, as for the removal construction method of the underground structure which consists of the said manhole cover receiving frame, as described in Claim 14, in the removal construction method of the underground structure of

Claim

11 or 12, the said underground structure is It is installed on the base wall of the manhole installed in the basement via a height adjusting material layer and the periphery is covered with pavement, part of it is exposed on the road surface, and the opening of the manhole base wall in the center A human hole lid receiving frame having a communicating central hole, wherein the central hole of the human hole lid receiving frame is used as an operation cavity for inserting the pull-up rod; Engaged means capable of engaging with the pulling rod engaging means are attached to the height adjusting material layer.

That is, at the time of the circular cutting step in the method for removing the underground structure, the pulling rod is inserted into the central hole of the human hole cover receiving frame provided in the center of the pavement of the inner cover of the human hole cover receiving frame as an operation cavity. Any one of the preceding operations is made to insert and engage the engaging means of the extension rod portion with the engaged means attached to the manhole cover receiving frame or its height adjusting material layer inside the central hole. At the same time as or before or after the operation, an operation of providing a stone thrust retainer at the opening of the central hole so that the lifting rod can be inserted and the stone thrust portion can be received and retained, and the center In the state in which the stone thrusting portion of the shaft is pressed and held at the opening of the central hole via the stone thrusting retainer, and the pulling rod is engaged with the engaged means. The central shaft The operation of causing the pavement of the manhole cover receiving frame inclusion to be shrunk and gripped from both sides by the stone thrusting portion of the central shaft and the engaging means of the pulling rod, and under the state, The cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft, whereby the pavement of the manhole cover receiving frame inclusion is cut into a required depth in a circle from the road surface.

When the pulling rod is composed of the main rod portion and the extension rod portion as described above, the pulling rod is inserted into the central hole of the manhole cover receiving frame as the operation cavity, and the pulling rod When the engaging means is engaged with the engaged means, the extension rod portion separated from the main rod portion of the pulling rod is inserted into the central hole of the manhole cover receiving frame and the extension as necessary. A first operation for engaging the engaging means of the rod part with the engaged means, and subsequently connecting the main rod part of the pulling rod to the extension rod part inside and / or outside the central hole. A second operation is performed.

As the engaged means attached to the manhole cover receiving frame or its height adjusting material layer inside the central hole, for example, hydraulic, pneumatic, electric, mechanical mechanism or appropriately combined them in the central hole A member composed of a well-known expansion bar, expansion wedge, expansion anchor, grip mechanism, claw locking mechanism, screw mechanism, etc., which is actuated by a mechanism or the like and can be engaged with the engagement means provided on the pulling rod, is appropriately adopted. Can do. In the method for removing an underground structure composed of the manhole cover receiving frame, the manhole cover receiving frame has an operation cavity composed of a relatively large diameter central hole, unlike the case of the temporary cover described above. In the center hole, the engaging operation between the engaging means and the engaged means can be easily performed as described above.

The central hole as the operation cavity in the manhole cover receiving frame has a large diameter unlike the guide hole drilled as the operation cavity when the temporary lid is removed as described above. Further, the stone strike holder provided so that the lifting rod can be inserted and the stone strike portion can be received and held is, for example, a disc-like body fitted to a lid receiving step portion on the inner periphery of the human hole lid receiving frame. Or a cross-linked body that is cross-linked in the diametrical direction or parallel to the lid receiving step part, and has a shape, structure, and size that can sufficiently resist the pressing force of the stone thrusting part and the holding force. May be.

Following the circular cutting step in the method for removing the underground structure, the cutting and paving step of cutting the circular paved plate of the human hole lid receiving frame inclusion from the peripheral fixing member and cutting the edge, and The movement / removal process of moving and removing the cut and paved slabs of the human hole lid receiving frame that has been broken and trimmed is performed in accordance with the corresponding processes in the underground construction method as described above.

In the removal method of the underground structure consisting of the manhole cover receiving frame according to claim 14, the engagement mode between the engaging means and the engaged means can be changed as necessary.

That is, as for the removal method of the underground structure, as described in claim 15, in the removal method of the underground structure according to claim 11 or 12, the underground structure is installed underground. It is installed on the manhole base wall via a height adjusting material layer and the periphery is covered with pavement, part of it is exposed to the road surface, and has a central hole communicating with the opening of the manhole base wall in the center. It is a manhole cover receiving frame, and the center hole of the manhole cover receiving frame is used as an operation cavity for inserting the pull-up rod, and the manhole cover receiving frame or its height adjusting material layer itself in the center hole Is used as an engaged means, and an engaging means capable of engaging with the manhole cover receiving frame or its height adjusting material layer is provided at the end of the pulling rod.

The engaging means provided at the end of the pulling rod is, for example, operated by hydraulic, pneumatic, electric, mechanical mechanism, etc. in the central hole, and the manhole cover receiving frame as the engaged means or the height adjustment thereof. A member composed of a known expansion bar, expansion wedge, expansion anchor, grip mechanism, claw locking mechanism, screw mechanism, or the like that can be engaged with the material layer can be appropriately employed.

In the method for removing the underground structure according to claim 14 or 15, when the manhole cover receiving frame is fastened by a connecting member on a manhole base wall as described in claim 16, In the breaking / edge cutting process or before the start of the process, the coupling member needs to be released from binding or cut or broken.

For cutting or breaking of the coupling member, for example, a required position between the human hole cover receiving frame and the human hole base wall inside the central hole, for example, the human hole cover receiving frame and a height adjusting material layer therebelow. In order to cut or break the coupling member inside them at a position such as between the height adjusting material layers or between the manhole base wall and the height adjusting material layer thereon, It may be carried out by rotating the cutting saw blade of the coupling member while rotating it, or press-fitting the cutting blade capable of cutting or breaking the coupling member using a mechanism such as hydraulic or electric power. Good.

Further, the cutting or breaking of the coupling member may be performed by, for example, inserting a cutting blade such as an extended wedge as an engaged means at a required position between the manhole cover receiving frame and a manhole base wall inside the center hole. And may be performed when held in the press-fit state.

[Road pavement method using temporary lid removal method]
The removal method of the underground structure including the temporary lid is preferably applied to various road pavement methods including cutting overlay pavement work, replacement pavement work, new pavement work, and the like.

That is, the road pavement method applicable to the method for removing the underground structure composed of the temporary lid is to close the opening on the manhole base wall installed in the basement as described in claim 17. A temporary lid installation step for attaching a temporary lid to the temporary lid, a temporary pavement construction step for constructing pavement above and around the temporary lid, and a pavement of the temporary lid inclusion mounted on the manhole base wall are cut into a circle. A circular cutting step, a cutting / patting step for cutting and cutting the circularly cut temporary lid inclusion cut pavement plate from a peripheral fixing member; and A movement / removal process for moving / removing from the wall, and a human hole cover frame installation process for installing a human hole cover frame on the manhole base wall via a height adjusting material and constructing a pavement around it. In the road pavement method including at least,
At least each process from the circular cutting process to the movement / removal process is performed by the underground structure removal method according to claim 13.

The road pavement method including the removal of the underground structure consisting of the temporary lid, cutting the surface layer, a part of the base layer, cutting overlay pavement work to construct the restoration pavement, excavating the surface layer, the base layer, upper roadbed and lower layer After the surface layer construction, remove the underground structure consisting of temporary lids and install the manhole cover receiving frame, such as the replacement pavement work that prepares the roadbed and restore pavement and the new pavement work that newly installs all pavement. There is a road pavement method including a step of installing the manhole base wall at the height of the surface layer.

In the case of the cutting overlay pavement construction, the height adjustment is performed on the manhole base wall installed in the basement before the step of attaching a temporary lid so as to close the opening on the manhole base wall. Cutting the pavement of the existing manhole cover receiving frame inclusion installed through the material into a circle, and breaking the circularly cut cut pavement plate of the existing manhole cover receiving frame inclusion and its height adjusting material from the peripheral fixing member The rupture and rim cutting step for cutting the edge, and the step of removing the cut pavement plate and the height adjusting material of the existing manhole cover receiving frame containing the circularly cut, ruptured, and edge-cut. These steps are preferably performed by the underground structure removal method according to

claim

14, 15 or 16.

Furthermore, in the case of the cutting overlay pavement construction, after the step of mounting the temporary lid so as to close the opening on the manhole base wall, in the step of pavement above and around the temporary lid, The step of constructing temporary restoration pavement above and around the temporary lid, the surface layer of the pavement including the temporary restoration pavement part, and the step of cutting the base layer are sequentially performed and the restoration pavement is applied on the cut pavement surface. The construction process is carried out, and usually the traffic is released prior to the construction of the restoration pavement.

In addition, in the case of the replacement pavement construction, before the step of mounting a temporary lid on the manhole base wall so as to close the opening, the surface layer and base layer of the pavement are excavated and the existing manhole cover receiving frame and The step of removing the height adjusting material is carried out, and after the step of attaching the temporary lid so as to close the opening on the manhole base wall, the step of constructing pavement above and around the temporary lid , The steps of leveling the upper layer roadbed, the lower layer roadbed, etc. and constructing the restoration pavement are carried out, and usually the traffic is released prior to the construction of the restoration pavement. Further, in the case of the new pavement construction, after the step of mounting the temporary lid so as to close the opening on the manhole base wall, in the step of pavement above and around the temporary lid, The construction of all pavements from the lower roadbed to the surface layer is carried out sequentially, and usually the traffic is released prior to the construction of the surface pavement.

[Road pavement construction method applying removal method of human hole lid support frame]
The underground structure removal method comprising the manhole cover receiving frame is suitably applied to various road pavement methods including, for example, cutting overlay pavement work and height adjustment pavement work of the manhole cover receiving frame.

That is, the road pavement construction method applicable to the removal method of the underground structure consisting of the manhole cover receiving frame is, as described in claim 18, a height adjusting material on a manhole base wall installed in the basement. A circular cutting step of cutting the pavement of the existing human hole cover receiving frame inclusion installed in a circle, and a break / edge cutting for breaking and cutting the cut pavement plate of the existing human hole cover receiving frame inclusion cut from the peripheral fixing member A moving / removing step of moving / removing the cut pavement plate and the height adjusting material of the existing human hole lid receiving frame containing the broken, edge-cut, and the height adjusting material on the human hole base wall; In the road pavement construction method including at least a human hole cover receiving frame installation step of installing a new human hole cover receiving frame via a height adjusting material and constructing pavement around it,
At least each step from the circular cutting step to the moving / removing step is performed by the underground structure removing method according to any one of claims 14 to 16.

The road pavement method including the removal of the underground structure consisting of the manhole cover frame includes paving of the existing manhole cover frame including the cutting overlay pavement and the height adjustment pavement of the manhole cover frame. After the removal of the manhole cover receiving frame by circular cutting, a road pavement method including a step of installing a new manhole cover receiving frame at the height of the existing pavement surface on the manhole base wall can be mentioned.

As described above, according to the invention of the circular cutting device according to claim 1, in the circular cutting step of the cutting object, the stone thrust portion of the central shaft pressed and held by the cutting object, and the cutting With the pulling rod engaging means engaged with the engaged means of the object, the object to be cut is clamped and gripped from both sides, and the stone thrust portion of the central shaft and the pulling rod The cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft while taking the required rotational reaction force and propulsion reaction force on the object to be cut through the engagement means, and thereby propelled in the axial direction of the shaft. The object to be cut can be cut circularly to a required depth. That is, the clamping force of the object to be cut and circular cutting under gripping prevent vibration and blurring of the central shaft during circular cutting, increase the width of the cutting groove, and the cutting bit of the cutting bit, the supporting member of the cutting chip, etc. Wear and the like can be suppressed.

According to the invention, the object to be cut, which has been circularly cut as described above, and further broken and edge-cut from the peripheral fixing member, is separated from both sides by the stone thrusting portion of the central shaft and the engaging means of the pulling rod. With the pinched and gripped state, the center shaft can be pulled up while maintaining balance without unstable swinging by the support moving means, and can be moved to and removed from the required position. Safety and workability can be ensured.

According to the invention of the circular cutting device according to claim 2, when the engaging means of the pulling rod is engaged with the engaged means of the cutting object in the circular cutting step, the main rod portion of the pulling rod After engaging the engaging means of the short and light extension rod part separated from the engaged means of the object to be cut, the extension rod part is connected to the main rod part. The operation of engaging the engaging means with the engaged means can be accurately positioned without moving the pulling rod as a whole with the central shaft, and thus without moving the entire circular cutting device. It is easy, reliable and safe with good workability.

According to the invention of the circular cutting device according to claim 3, when circularly cutting the object to be cut, if necessary, each leg portion of the reaction force receiving frame is brought into contact with an outer region of the circular cutting. By operating the reaction force receiving frame, the center shaft is more stabilized in the state where the stone thrusting part is pressed and held against the inner area of the circular cutting, and the occurrence of vibration and blurring is further suppressed, thereby cutting Increase in the groove width and wear of the cutting tip of the cutting bit and the supporting member of the cutting tip are suppressed.

Further, according to the invention, when the circular cut object to be cut is ruptured or edge-cut, the reaction force is applied in a state where the engaging means of the pulling rod is engaged with the engaged means of the cutting object. The pulling rod is urged in the contraction direction with respect to the central shaft through the reaction force receiving frame while operating the reaction force receiving frame by bringing each leg portion of the receiving frame into contact with the outer region of the circular cut. By doing so, the circularly cut cutting object is effectively broken and edge-cut from the peripheral fixing member without overloading the supporting moving means such as a boom of a crane truck, thereby supporting moving means. It is possible to prevent the failure and breakage of the machine and to ensure the safety and workability of the operator.

Furthermore, according to the invention, it is possible to smoothly and smoothly carry out the circular cutting process, the breaking / edge cutting process, and the moving / removing process with one type of apparatus.

According to the invention of the circular cutting device according to claim 4, when the circularly cut object to be cut is ruptured and trimmed, the center shaft is pressed and held by the object to be cut, and the cutting object is cut. With each of the pulling rod engaging means engaged with the object engaged means, each leg portion of the reaction force receiving frame is circularly shaped under a state where the object to be cut is clamped and gripped from both sides. By urging the movable shaft portion of the central shaft in the contracting direction with respect to the main shaft portion via the reaction force receiving frame while operating the reaction force receiving frame in contact with the outer region of the cutting The circularly cut object is effectively broken and edge-cut from the peripheral fixing member without overloading the supporting moving means such as a boom of a crane truck, thereby causing a failure of the supporting moving means. Corruption It is possible to ensure the safety and workability such worker is prevented.

In addition, in the said invention, if substantially the same function as the circular cutting device of Claim 3 is exhibited as needed, it can also show | play the effect substantially the same as the invention which concerns on Claim 3. is there.

According to the circular cutting method of the present invention, in other words, the object to be cut is sandwiched and gripped from both sides by the stone thrusting portion of the central shaft and the engaging means of the pulling rod. For example, the central shaft supported by the support moving means is firmly fixed and integrated with the object to be cut by the pinching and gripping, and the stone thrust portion of the central shaft and the lifting rod are The cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft by the bit driving means while taking the required rotational reaction force and propulsion reaction force on the object to be cut through the engaging means, thereby The object to be cut can be cut into a circular shape to a required depth, and the vibration and blurring of the center shaft during circular cutting can be prevented, the cutting groove width can be increased, the cutting bit of the cutting bit, and the cutting tip It is possible to suppress the wear or the like of the supporting member or the like of the flop.

According to the invention of the circular cutting method according to claim 6, when the cutting object is circularly cut, the cutting object is clamped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod. In the gripped state, each of the reaction force receiving frames is brought into contact with the outer region of the circular cutting to operate the reaction force receiving frame, so that the central shaft has a circular stone protrusion. More stable when pressed and held in the inner area of the cutting, further suppressing vibration and blurring, thereby increasing the width of the cutting groove and wear of the cutting tip of the cutting bit and the support member of the cutting tip Etc. are suppressed.

According to the invention of the circular cutting method according to claim 7, the same effect as that of the invention according to claim 5 can be obtained, and in the circular cutting step, the engaging means of the pulling rod can be used as the operating cavity. When engaging the engaged means via the first rod, as a first operation, a short and light extension rod portion separated from the main rod portion of the pulling rod is inserted into the operation cavity of the cutting object and the Since the engaging means of the extension rod part is engaged with the engaged means, and then the main rod part of the pulling rod is connected to the extension rod part as a second operation, the pulling rod Without moving the entire central cutting shaft together with the central shaft, and thus without moving the entire circular cutting device, the insertion of the extension rod portion into the operating cavity and the engagement means. The operation of engagement of the engagement means may workability precise positioning easily can be reliably and safely performed.

According to an invention of a circular cutting method according to claim 8, in the circular cutting method according to claim 7, the first operation and the second operation are not performed continuously for work planning or for other reasons. In the case where the construction is carried out at different times, or when the plurality of underground structures are removed, the plurality of underground structures can be used rather than continuously performing the first operation and the second operation for each structure in each place. First, the first operation is performed, and then the engagement operation is performed from the end of the first operation to the start of the second operation, etc. In a state in which the operation portion is completely stored in the operation cavity, the operation cavity opening is temporarily covered so that foreign matter does not enter the operation cavity or the traffic is not hindered. Can be put.

According to the invention of the circular cutting method according to claim 9, in the circular cutting method according to

claim

7 or 8, the extension rod portion is a rod formed by engagement of the expanded engagement piece with the engagement hole. The movement in the axial direction is restricted, and the movement in the downward direction of the rod axis is restricted by the locking of the stopper portion with respect to the engagement hole, and thereby the engagement means and the engaged means of the extension rod portion are restricted. Reliable engagement can be obtained. Further, the extension rod portion is limited by a stopper portion so as not to penetrate the engagement hole through before and after the engagement, and to be held within a certain range in the rod axial direction position after the engagement. Therefore, each operation | work of the connection operation of the said extension rod part and the main rod part after the said engagement operation and the said engagement is convenient.

According to the invention of the circular cutting method according to claim 10, in the circular cutting method according to

claim

7 or 8, the extension rod portion is an engagement piece whose angular position with respect to the engagement hole is changed. Due to the engagement, the movement in the upward direction of the rod axis is restricted, and the insertion of the locking piece into the expansion hole of the engagement hole prohibits rotation around the rod axis with respect to the engagement hole. Due to the locking of the stopper portion with respect to the engagement hole, the movement in the downward direction of the rod axis is restricted, and thereby, the engagement means of the extension rod portion and the engaged means can be reliably engaged, The unexpected engagement release after the engagement can be prevented by fitting the locking piece into the expansion hole of the engagement hole during the engagement. Further, the extension rod portion is limited by a stopper portion so as not to penetrate the engagement hole through before and after the engagement, and to be held within a certain range in the rod axial direction position after the engagement. Therefore, each operation | work of the connection operation of the said extension rod part and the main rod part after the said engagement operation and the said engagement is convenient.

According to the invention of the underground structure removal method according to claim 11, in the circular cutting step, the pavement of the underground structure inclusion is formed by engaging the stone thrusting portion of the central shaft and the lifting rod. In other words, the center shaft supported by the support moving means is firmly fixed to the pavement of the underground structure inclusion by the clamping pressure and gripping. In the grounded state, while taking the required rotational reaction force and propulsion reaction force to the pavement of the submerged structure inclusions through the stone thrust part of the central shaft and the engaging means of the pulling rod, The pavement of the structure-containing pavement can be cut into a circular shape to a required depth, and as described above, the center shaft is not vibrated or shaken during circular cutting, and the cutting groove width is increased and the cutting tip of the cutting bit and the Cutting tip support member It is possible to suppress the wear or the like.

Further, in the breaking / edge cutting step, the pulling rod is contracted by separating the stone thrusting part upward from the stone thrusting holder by a required distance while engaging the engaging means with the engaged means. The pulling rod with respect to the central shaft while taking a required pulling reaction force on the road surface of the outer region of the circular cutting of the outer region of the circular cutting through the reaction force receiving frame in a state where a possible stroke is secured. Due to the contraction of the ground structure, the cut pavement plate of the underground structure inclusion is pulled up integrally, and is also broken and edge-cut from the peripheral fixing member, whereby the support moving means is not burdened by the pulling reaction force.

Next, in the moving / removing step, the cut and paved slab of the submerged underground structure is clamped and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod. In other words, in other words, the central shaft supported by the support moving means is firmly fixed and integrated with the pavement of the underground structure inclusion by the clamping and gripping, By the movement of the central shaft by the support moving means, the cut and paved plate of the underground structure inclusion is safely and stably moved to and removed from the vehicle bed, etc. The cut pavement plate containing the intermediate structure is gripped stably and reliably, and is moved and removed in a balanced manner without unstable swinging.

Therefore, in the removal method of the underground structure, a single circular cutting device is exclusively used as a main device in each of the series of steps from the circular cutting step to the movement / removal step through the breaking / edge cutting step, As in the prior art, a circular cutting device is used for the circular cutting process, a lifting device such as a jack is used for the breaking / edge cutting process, and a boom for a crane car is used for the moving / removing process. There is no need to switch to a dedicated device.

According to the invention of the underground construction removal method according to claim 12, the circular cutting step and the movement / removal step have the same effects as the invention according to claim 11, but in the breaking / edge cutting step. After the preceding circular cutting step, the cut pavement plate of the underground structure contained in the circular cut was sandwiched and gripped from both sides by the stone thrusting portion of the central shaft and the engaging means of the lifting rod. Under the condition, the movable shaft portion of the central shaft is contracted by a required distance with respect to the main shaft portion via the reaction force receiving frame, that is, at least a distance capable of causing breakage and edge cutting, and thereby the circular cutting. The cut pavement plate containing the underground structure is broken and edge-cut from the peripheral fixing member in a stable clamping and gripping state. In this case, the pavement of the submerged structure enveloping is performed by the stone thrusting portion of the central shaft and the engaging means of the pulling rod from the circular cutting process, through the movement / removal process to the breaking / edge cutting process. It is in a state of being pinched and gripped from both sides.

According to the invention of the underground construction removal method according to claim 13, for example, in the case of cutting overlay pavement construction, replacement pavement construction or new construction pavement construction, the removal of the underground structure according to claim 11 or 12 Temporary lid with engagement holes that are installed on the base wall of the manhole installed in the basement so that the opening is closed and the pavement is constructed above and around and buried under the road surface as a whole It can be applied to the removal of underground structures consisting of the above, and the same effect as described above can be obtained.

According to the invention of the method for removing structures in various places according to claim 14 and claim 15, for example, in cutting overlay pavement construction, height adjustment pavement construction of a manhole cover receiving frame, etc. The underground structure removal method is installed on the base wall of the manhole in the basement via a height adjuster layer and the surrounding area is covered with pavement, and part of it is exposed on the road surface. The present invention can be applied to the removal of an underground structure including a manhole cover receiving frame having a central hole communicating with the opening of the manhole base wall, and the same effect as described above can be obtained.

According to the invention of the underground construction removal method according to claim 16, in the underground construction removal method according to claim 14 or 15, the manhole cover receiving frame is a coupling member on the manhole base wall. In the case of being fastened, the connecting member is released from the fastening or is cut or broken in the breaking / edge cutting step or before the start of the step, so that the steps after the breaking / edge cutting step are performed without any trouble. be able to.

According to the invention of the road pavement method according to claim 17, the surface layer, a part of the base layer are cut, the cut overlay pavement work for constructing the restoration pavement, the surface layer, the base layer are excavated, and the upper layer roadbed or the lower layer roadbed is arranged. Remove the underground structure consisting of temporary lids and place the manhole cover receiving frame on the manhole base wall after construction of the surface layer, such as replacement pavement work to construct restoration pavement and new pavement work to newly install all pavement In the road pavement construction method including the step of installing at the height of the surface layer, at least a series of steps from the circular cutting step to the movement / removal step, the underground structure comprising the temporary lid according to claim 13. The above-described removal method can be suitably applied to obtain the effects as described above.

According to the invention of the road pavement construction method according to claim 18, the human hole by circular cutting of the pavement of the existing manhole cover receiving frame inclusion, such as the cutting overlay pavement work and the height adjustment pavement work of the human hole cover receiving frame. In the road pavement method including the process of installing a new human hole cover frame on the base wall of the human hole at the height of the existing pavement surface after removing the cover frame, at least in each process from the circular cutting process to the moving / removing process The above-described operation and effect can be obtained by suitably applying the method for removing an underground structure comprising a human hole lid receiving frame according to any one of claims 14 to 16.

Note that the operational effects of the inventions according to claims 1 to 18 are not limited to the operational effects.

FIG. 1A is a schematic front view of a first circular cutting device of the present invention, and FIG. 1B is a schematic front view of a split pulling rod applicable to the circular cutting device. FIG. 2A is a schematic front view of the second circular cutting device of the present invention in which the hydraulic motor and the driving gear are displaced 90 degrees for convenience, and FIG. 2B is applicable to the circular cutting device. It is a front schematic diagram of a split type pulling rod. 3A and 3B are an enlarged front view and an enlarged side view, respectively, of the gravity-driven engagement piece provided on the pulling rod as an engagement means when contracted, and FIG. 3C is the engagement. It is an enlarged front view at the time of expansion of a piece. 4 (A) and 4 (B) are an enlarged sectional view and a bottom view, respectively, when the fluid pressure driven engagement piece provided as an engagement means on the pulling rod is contracted, and FIGS. 4 (C) and (D). Fig. 4E is an enlarged cross-sectional view and a bottom view of each of the engaging pieces when they are expanded, and Fig. 4E is a drawing of the engaging pieces provided as engaging means on a pulling rod having a micro camera and LED light on the front surface. It is a bottom view at the time of contraction. 5 (A-1), 5 (B), and 5 (C) are cross-sectional views of the engaging means provided in the extension rod portion of the split-type pulling rod applicable to the circular cutting device, respectively. FIG. 2B is a front view of the engaging means in a state in which the same drawing (A-1) is rotated 90 degrees around the axis. 6 (A) and 6 (B) are diagrams showing a method for removing an underground structure including a temporary lid according to the present invention before and after the operation cavity is drilled in the cutting center of the pavement. It is explanatory sectional drawing which shows each situation. In the circular cutting step in the method for removing an underground structure consisting of a temporary lid according to the present invention, FIG. 7 shows that the central shaft of the first circular cutting device is provided with an engagement piece at the tip of the pulling rod, It is explanatory sectional drawing which shows the condition erected along the cutting center axis line on the pavement of the temporary lid inclusion. FIG. 8 shows that, following the operation shown in FIG. 7, the pulling rod is inserted into the operation cavity through the stone thrust holder, and the engagement piece at the tip is engaged with the central hole of the temporary lid so as to contract. FIG. 5 is an explanatory cross-sectional view showing a situation where the stone thrusting portion of the central shaft is pressed and held by the opening of the operation cavity via the stone thrusting retainer while being biased by the shaft. FIG. 9 shows a central shaft in which the pavement including the temporary lid presses and holds the stone thrusting part through the stone thrusting holder in the opening of the operation cavity following the operation shown in FIG. It is explanatory sectional drawing which shows the condition cut circularly under the state clamped from the upper and lower sides with the pulling-up rod engaged with the engagement piece by the center hole, and urged | biased in the contraction direction. FIG. 10 shows a state in which, after the operation shown in FIG. 9, the cut pavement plate of the temporary lid containing the circular cut is supported by the pulling rod having the engagement piece engaged with the central hole of the temporary lid. FIG. 5 is an explanatory cross-sectional view showing a situation where the pulling rod is pulled up through the reaction force receiving frame due to contraction of the pulling rod. FIG. 11A shows the contraction of the lifting rod when the engaging means is engaged with the engaged means while the stone thrusting part is separated from the cut pavement plate by a required distance during the operation shown in FIG. FIG. 11B is an explanatory cross-sectional view showing a situation where a possible stroke is ensured, and FIG. 11B shows an inner area of the circular cutting of the pavement and the stone thrusting portion in the circular cutting process in order to ensure the contractible stroke of the pulling rod. FIG. 11C is a cross-sectional view illustrating a situation in which a spacer having a required thickness is interposed in advance so that it can be removed during the operation. FIG. The holding shaft is pressed and gripped from above and below by the central shaft that presses and holds the stone thrusting part through the container, and the pulling rod that is engaged with the central hole of the temporary lid and biased in the contraction direction. Under the condition that the reaction force Each leg of the frame is an explanatory sectional view showing a situation the steps to be jacked up. 12, following the operation shown in FIG. 10, the cut pavement plate of the temporary lid containing the fractured and trimmed edge was pressed and held by the opening of the operation cavity via the stone holder. The center shaft is driven by the support moving means in a state of being clamped and gripped from above and below by the center shaft and the pulling rod engaged with the engagement piece in the center hole of the temporary lid and urged in the contraction direction. It is explanatory sectional drawing which shows the condition moved and removed by this. FIGS. 13 (A) and 13 (B) show the pavement in the circular cutting step in the removal method of the underground structure consisting of a multi-layer temporary lid formed by laminating and fixing the adjustment plate portion on the substrate portion according to the present invention. It is explanatory sectional drawing similar to FIG. 6 (A) and (B) which shows the condition before and after the drilling of the operation cavity at the cutting center, respectively. FIG. 14A is a cross-sectional view of a stone thrusting portion pressed and held in the opening of the operation cavity via a stone thrust retainer, and FIGS. 14B and C are the opening of the operation cavity. It is sectional drawing of the stone thrust part directly pressed and hold | maintained to the circumference | surroundings or its periphery. 15 (A) and (B) illustrate the pavement structure of a human hole cover receiving frame inclusion in the method for removing an underground structure consisting of a human hole cover receiving frame according to the present invention, and FIG. FIG. 5B shows a state in which the manhole cover receiving frame is not fastened on the manhole base wall, and FIG. 7B shows that the manhole cover receiving frame fastened with embedded bolts and nuts is included on the manhole base wall. A state in which the bolt and nut are cut or broken in advance. FIG. 16 is a cross-sectional view of a method for removing an underground structure consisting of a manhole cover receiving frame according to the present invention, in which the central shaft of the first circular cutting device is provided with an engagement piece at the tip of the pulling rod. FIG. 5 is an explanatory cross-sectional view showing a situation in which the person hole cover receiving frame inclusion is erected along the cutting center axis on the pavement. FIG. 17 is a cross-sectional view of a method for removing an underground structure including a manhole cover receiving frame that is fastened with a buried bolt and nut as a connecting member on a manhole base wall according to the present invention. FIG. 16 shows a state in which the central shaft of the circular cutting device is erected along the cutting central axis line on the pavement of the inner cover of the manhole cover receiving frame by disposing an engagement piece at the tip of the pulling rod after cutting. It is similar explanatory sectional drawing. FIG. 18 shows that, following the operation shown in FIG. 16, the pulling rod is inserted into the operation cavity through the stone holder and the engagement piece at the tip is the boundary between the manhole base wall and the height adjusting member. Engaged with the engagement hole of the expansion wedge member press-fitted and fixed in the vicinity and urged in the contraction direction, the stone thrusting portion of the center shaft presses the opening of the operation cavity via the stone thrusting retainer, It is explanatory sectional drawing which shows the state hold | maintained. FIG. 19 shows that, following the operation shown in FIG. 18, the pavement included in the manhole cover receiving frame presses and holds the stone thrusting portion through the stone thrusting holder at the opening of the operation cavity, The engagement piece is engaged with the engagement hole of the expansion wedge member press-fitted and fixed near the boundary between the hole base wall and the height adjusting member, and is clamped from above and below with the lifting rod biased in the contraction direction. It is explanatory sectional drawing which shows the condition cut circularly under the state hold | gripped. FIG. 20 shows an extended wedge member in which a circular paved plate of the manhole cover receiving frame is press-fitted and fixed near the boundary between the manhole base wall and the height adjusting material following the operation shown in FIG. It is explanatory sectional drawing which shows the condition pulled up via a reaction force receiving flame | frame by the shrinkage | contraction of a pulling rod under the state supported by the pulling rod with which the engagement piece of the front-end | tip was engaged with the engagement hole. FIG. 21 shows that, following the operation shown in FIG. 20, the cut pavement plate of the inside of the manhole cover receiving frame, which has been broken and trimmed, presses and holds the stone thrusting part through the stone thrusting holder in the opening of the operation cavity. The engagement piece at the tip is engaged with the engagement hole of the extended wedge member press-fitted and fixed near the boundary between the center shaft and the manhole base wall and the height adjusting member, and is urged in the contraction direction. It is explanatory sectional drawing which shows the condition moved and removed by the drive of the center shaft by a support movement means under the state clamped and grasped from the upper and lower sides with the pulling rod. FIG. 22 is different from the engagement mode shown in FIGS. 16 to 21 in the circular cutting step in the removal method of the underground structure composed of the manhole cover receiving frame according to the present invention, the central shaft of the first circular cutting device. However, an expansion wedge member is provided as an engaging means at the tip of the pulling rod and a stone thrust retainer is penetrated and held thereabove, and is erected along the cutting center axis line on the pavement of the inner cover of the manhole cover receiving frame. It is explanatory sectional drawing which shows a condition. FIG. 23 shows that, following the operation shown in FIG. 22, the pulling rod causes the stone thrust retainer to be mounted on the peripheral step portion of the manhole cover receiving frame, and each wedge body of the extended wedge member at the tip is positioned higher than the manhole base wall. It is explanatory sectional drawing which shows the condition inserted into the cavity for operation so that it might press-fit in the vicinity of a boundary with a thickness adjusting material, and was inserted. FIGS. 24 (A-1) to (I) show that, in the circular cutting process in the method for removing an underground structure consisting of a temporary lid according to the present invention, the split-type pull-up rod is placed with a stone thrust cage in the operation cavity. It is explanatory drawing which shows continuously the condition where the engagement piece of a front-end | tip is engaged with the center hole of a temporary lid while it is penetrated through. 25 (A-1) to 25 (F) show a split-type pulling rod in a mode different from the procedure shown in FIG. 24 in the circular cutting process in the removal method of the underground structure including the temporary lid according to the present invention. FIG. 5 is an explanatory view continuously showing a state in which is inserted through an operation cavity through a stone thrust retainer and an engagement piece at a tip is engaged with a central hole of a temporary lid. FIGS. 26 (A-1) to (E) show a split-type pull-up rod placed in the operation cavity in the circular cutting step in the removal method of the underground structure consisting of the temporary lid according to the present invention. It is explanatory drawing which shows continuously the condition where the engagement piece of a front-end | tip is engaged with the center hole of a temporary lid in the aspect different from the engagement structure shown in FIG. In FIG. 27, following the operation shown in FIGS. 24 to 26, the split-type pull-up rod is inserted into the operation cavity through the stone thrust holder, and the engagement piece at the tip engages with the central hole of the temporary lid. FIG. 9 is an explanatory sectional view similar to FIG. 8, showing a situation where the stone thrusting portion of the central shaft is pressed and held via the stone thrusting retainer to the opening of the operation cavity while being biased in the contraction direction. is there. FIG. 28 is a sectional view of a circular cutting step in the method for removing an underground structure consisting of a manhole cover receiving frame according to the present invention, in the same manner as the operations shown in FIGS. It is explanatory drawing which shows the condition where the engaging means of the front-end | tip was engaged with the to-be-engaged means arrange | positioned inside the said operation cavity while being penetrated through a stone thrust holder. In FIG. 29, following the operation shown in FIG. 28, the split-type pulling rod is inserted into the operation cavity through the stab holder, and the engagement piece at the tip is the manhole base wall, the height adjusting material, Is engaged with an engagement hole of an expansion wedge member press-fitted and fixed near the boundary of the shaft, and is biased in the contraction direction, while the stone thrusting portion of the central shaft is inserted into the opening of the operation cavity via a stone thrusting retainer. It is explanatory sectional drawing similar to FIG. 18 which shows the state pressed and hold | maintained. FIGS. 30 (A) to (J) show a series of steps from the circular cutting step to the moving / removing step through the breaking / edge cutting step in the method for removing an underground structure consisting of a temporary lid according to the present invention. It is explanatory drawing which shows continuously the condition implemented using the 2nd circular cutting device of this invention to which a split type pulling rod is applied. 31 (A) and 31 (B) are explanatory cross-sectional views showing, on an enlarged scale, the fracture / edge cutting preparation process and the subsequent fracture / edge cutting process shown in FIGS. 30 (G) and 30 (H), respectively.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Configuration of the first circular cutting device]
In the first circular cutting device, as shown in FIG. 1 (A), the central shaft 1 is vertically supported by a boom 2 of a crane truck, which is a support moving means, at an upper portion thereof. A rotary shaft 3 is provided on the central shaft 1 so as to be movable up and down via a bearing and is rotatable. On the rotary shaft 3, a housing 4 is relatively immovable in the axial direction via a bearing. In addition, the center shaft 1 can be moved up and down integrally with the rotation shaft 3 so as to be rotatable.

A hydraulic motor 5 is mounted on the housing 4, and a driving gear 6 provided on the drive shaft of the hydraulic motor 5 and a driven gear 7 provided on the rotating shaft 3 are engaged with each other in the housing 4. A cylindrical cutting bit 9 having a cutting tip 9 a at the lower end edge is connected to the lower end of the rotating shaft 3 via a bit mounting base 8, and the driving gear 6 and the driven gear 7 are connected by rotational driving of the hydraulic motor 5. Through which the rotating shaft 3 rotates, whereby the cutting bit 9 is rotated on the central shaft 1.

A hydraulic cylinder 10 is interposed between the bracket 1 b provided on the central shaft 1 and the housing 4, and the cutting bit 9 is propelled on the central shaft 1 integrally with the housing 4 by the expansion and contraction drive of the hydraulic cylinder 10. Be made. When the hydraulic cylinder 10 is specifically mounted, a tube of the hydraulic cylinder 10 is suspended from a bracket 1 b on the center shaft 1 and its rod end is connected to the housing 4.
The hydraulic motor 5 and the hydraulic cylinder 10 constitute a bit driving means in the present invention for rotating the cutting bit 9 on the central shaft 1 and propelling it in the axial direction.

Further, the central shaft 1 is provided with a pulling rod 11 that can be expanded and contracted by hydraulic drive from the lower end in the axial direction of the shaft, and the lower end of the central shaft 1 can be pressed and held on the cutting center of the object to be cut. An inverted frustoconical stone protrusion 1 a is extended, and an engaging means 20 is provided at the end of the pulling rod 11.

Furthermore, a reaction force receiving frame 21 is provided on the central shaft 1 so as not to interfere with the housing 4 and the cutting bit 9. The reaction force receiving frame 21 protrudes in a radial direction from a bracket 1b provided on the center shaft 1 and reaches a position facing the outer area of the circular cut, and ends of the respective transverse beams 22 Each of the leg portions 23 is fixed at a required position by a lock pin, and the height of the telescopic cylinder portion 24 can be roughly adjusted, and an adjustment bolt. It is comprised from the adjustment stand part 25 in which height can be finely adjusted. When the reaction force receiving frame 21 is operated, the telescopic cylinder portion 24 and the adjustment base portion 25 of each leg portion 23 are adjusted so that the adjustment base portion 25 of each leg portion 23 is in contact with the outer area of the circular cut. Is done.

As the pulling rod 11, as shown in FIG. 1 (B), a split type composed of a main rod portion 12 and an extension rod portion 13 detachably connected to the shaft axis direction is also preferably used. In this case, the engaging means 20 is provided at the end of the extension rod portion 13.

[Configuration of Second Circular Cutting Device]
The second circular cutting device is the same as the first circular cutting device described above in basic configuration and function, but the second circular cutting device has a structure in which the central shaft of the first circular cutting device can be expanded and contracted. Accordingly, the mounting manner of the housing and the reaction force receiving frame in which the hydraulic motor is mounted and the speed change transmission mechanism is built is different from the case of the first circular cutting device.

That is, in the second circular cutting device, as shown in FIG. 2 (A), the center shaft 1 is connected to the main shaft portion 1f and the main shaft portion 1f in a required range in the shaft axis direction via a hydraulic cylinder. For example, a movable shaft portion 1g that can be extended and contracted in a range of 0 to 50 mm, 0 to 100 mm, and the like, and is vertically supported by the boom 2 of a crane truck that is a support moving means on the main shaft portion 1f. Has been.

A rotary shaft 3 is provided on the movable shaft portion 1g so as to be able to move up and down via a bearing and to be rotatable. On the rotary shaft 3, a housing 4 is relatively immovable in the axial direction via a bearing. In addition, it is rotatably provided so as to be movable up and down integrally with the rotary shaft 3 with respect to the movable shaft portion 1g.

A hydraulic motor 5 is mounted on the housing 4, and a driving gear 6 provided on the drive shaft of the hydraulic motor 5 and a driven gear 7 provided on the rotating shaft 3 are engaged with each other in the housing 4. A cylindrical cutting bit 9 having a cutting tip 9 a at the lower end edge is connected to the lower end of the rotating shaft 3 via a bit mounting base 8, and the driving gear 6 and the driven gear 7 are driven by the rotational drive of the hydraulic motor 5. The rotating shaft 3 is rotated via this, whereby the cutting bit 9 is rotated on the movable shaft part.

Further, a hydraulic cylinder 10 is interposed between the bracket 1 c provided on the movable shaft portion 1 g and the housing 4, and the cutting bit 9 is integrated with the housing 4 on the central shaft 1 by the expansion and contraction drive of the hydraulic cylinder 10. To be promoted. When the hydraulic cylinder 10 is specifically mounted, the tube of the hydraulic cylinder 10 is suspended from the bracket 1 c and the rod end is connected to the housing 4.

The hydraulic motor 5 and the hydraulic cylinder 10 constitute a bit driving means in the present invention for rotating the cutting bit 9 on the central shaft 1 and propelling it in the axial direction.

Further, the movable shaft portion 1g of the central shaft 1 is provided with a pulling rod 11 that can be expanded and contracted by hydraulic drive from the lower end in the axial direction of the shaft, and the lower end of the movable shaft portion 1g has a cutting center on the cutting object. An inverted frustoconical stone protrusion 1 a that can be pressed and held is extended, and an engaging means 20 is provided at the end of the pulling rod 11.

Further, a reaction force receiving frame 21 is provided on the main shaft portion 1 f of the center shaft 1 so as not to interfere with the housing 4 and the cutting bit 9. The reaction force receiving frame 21 protrudes in a radial direction from the bracket 1b provided on the main shaft portion 1f and reaches a position facing the outer region of the circular cut, and ends of the respective transverse beams 22 Each of the leg portions 23 is fixed at a required position by a lock pin, and is provided with a telescopic cylinder portion 24 having a coarsely adjustable height, and a hydraulic pressure. It is comprised from the adjustment stand part 25 which can adjust height finely with a jack. When the reaction force receiving frame 21 is operated, the telescopic cylinder portion 24 and the adjustment base portion 25 of each leg portion 23 are adjusted so that the adjustment base portion 25 of each leg portion 23 is in contact with the outer area of the circular cut. Is done.

As the pulling rod 11, as shown in FIG. 2 (B), a split type composed of a main rod portion 12 and an extension rod portion 13 that is detachably connected to the shaft axial direction is also preferably used. In this case, the engaging means 20 is provided at the end of the extension rod portion 13.

[Configuration of Embodiment (1) of Engaging Means]
As the engagement means 20, for example, as shown in an enlarged view in FIGS. 3A to 3C, the rotation engagement piece 11a is unbalanced via the pivot 11b displaced from the center position. That is, it is pivotally attached so that the length differs between the left and right sides. In the rotating engagement piece 11a configured as described above, when it is inserted into a small-diameter operation cavity, which will be described later, as shown in FIGS. When it is inserted in the position, and after the insertion, the restriction by the operation cavity is lost, the long piece part naturally rotates to the horizontal position by gravity to the position of the stopper 11c, and FIG. 1 and FIG. As shown in the above, it is configured to take an extended posture so as to be engageable with an engaged means described later.

[Configuration of Embodiment (2) of Engaging Means]
As an alternative example of the engaging means, as shown in FIGS. 4A to 4D, a crank pin 11d provided eccentrically adjacent to the pivot 11b at the center position or eccentric position of the rotating engagement piece 11a. A piston pin 11f on a piston shaft 11e provided in the pulling rod 11 so as to be movable in the rod axis direction is bridged by a connecting piece 11g so as to be able to perform a crank motion. In the engaging piece 11a configured as described above, when it is inserted into a small-diameter operation cavity, which will be described later, as shown in FIGS. When the rotational engagement piece 11a is held in the contracted vertical position by being moved downward by the fluid pressure, and after the insertion, the restriction by the small-diameter operation cavity is removed, the figure (C ) And (D), the piston shaft 11e is moved to the upper position by fluid pressure, and the turning engagement piece 11a is turned to the horizontal position so that it can be engaged with the engaged means described later. It is configured to take an extended posture.

[Configuration of Embodiment (3) of Engaging Means]
Further, in the embodiments (1) and (2) of the engaging means, as shown in FIG. 4 (E), a micro camera 11h and an LED light 11i are attached to the front surface of the pulling rod 11, and in this case, pulling up When the rod 11 is inserted into an operation cavity to be described later, or when the rotation engaging piece 11a is engaged with an engaged means to be described later, illumination by the LED light 11i is performed as necessary. The image taken by the micro camera 11h without or under illumination is received by the liquid crystal monitor 11j wirelessly or by wire, and the operation is performed reliably and efficiently while referring to the image on the liquid crystal monitor 11j. Can do.

[Configuration of Embodiment (4) of Engaging Means]
As an alternative example of the engaging means, as shown in FIGS. 5A-1 and 5A-2, the pulling rod 11 is an extension in which the main rod portion 12 is detachably connected to the shaft axial direction. The extension rod portion 13 includes an engagement action portion 14 and an intermediate adjustment portion 15, which are connected via a screw connection mechanism 18, that is, the intermediate portion. The bolt 18b is screwed into a female screw 18c drilled in the upper end of the engaging action portion 14 through a bolt hole 18a drilled in the lower end of the adjusting portion 15, and is detachably connected. In addition, for positioning between the two at the time of connection, a pin 18d that is bridged in the diametrical direction to the engaging action portion 14 and a groove 18e that is pierced in the diametrical direction in the intermediate adjustment portion 15 are provided. Mated.

An engaging piece 14a protrudes radially at the end of the engaging action portion 14, and a stopper portion 14b bulges radially in a position spaced from the engaging piece 14a in the rod axis direction. Further, on the side opposite to the engaging piece 14a with respect to the stopper portion 14b, the floating portion 14c is loosely fitted so as to be non-rotatable and movable in the rod axis direction within a range not exceeding the stopper portion 14b. The locking piece 14d is provided along the rod axis direction so as not to interfere with the stopper portion 14b at an angular position 90 degrees away from the engagement piece 14a. The said members cooperate and comprise the engaging means 20 in this invention.

Further, the intermediate adjusting portion 15 is provided with a pin hole 19a for being connected to the main rod portion 12 via a pin connecting mechanism 19.

[Configuration of Embodiment (5) of Engaging Means]
As an alternative example of the engaging means, the extension rod portion 13 constituting the pulling rod 11 includes an engaging action portion 14 and an intermediate adjusting portion 15 as shown in FIG. Instead of the above-described screw connection mechanism, it is detachably connected via a pin connection mechanism 19.

The engaging action portion 14 includes an engaging means 20 similar to the above-described engaging means shown in FIGS. 5A-1 and 5A-2, and the intermediate adjusting portion 15 includes the main adjusting portion 15. A pin hole 19a to be connected to the rod portion 12 via the pin connection mechanism 19 as described above is formed in a plurality of stages in the rod axis method, and the lowermost pin hole 19a is connected to the engaging action portion 14. For the pin connection.

[Configuration of Embodiment (6) of Engaging Means]
As an alternative example of the engaging means, the extension rod portion 13 constituting the pulling rod 11 includes an engaging action portion 14 and an intermediate adjusting portion 15 as shown in FIG. It is detachably connected via the pin connecting mechanism 19 as described above. Such a configuration is basically the same as the embodiment shown in FIG.

However, in the embodiment shown in FIG. 5C, as in the above-described embodiment (1), the engagement action portion 14 has an engagement piece 114a at its end, and the rod axis from the center of gravity. When the engaging action portion 14 is suspended as shown in FIG. 5C, it is pivotally mounted in an unbalanced manner through a pivot 114b perpendicular to the rod axis direction at a position eccentric in the direction. Unless the rotation is constrained from the outside, the joint piece 114a expands in the radial direction while rotating to the horizontal position at the maximum due to the difference in moments sandwiching the pivot 114b, and is held in the expanded posture by a stopper (not shown). The engaging piece 114a may be expanded from the hollow inside of the engaging action portion 14 in substantially the same manner as in the above-described embodiment (2).

The embodiment shown in FIG. 5 (C) is configured as shown in FIGS. 3 (A) to 3 (C) and FIGS. 4 (A) to (D) in the configuration of the split-type pulling rod 11 shown in FIG. 5 (B). This corresponds to the application of the appropriate engaging means 20.

[Removal method of underground structure consisting of temporary lid (1)]
<< Preparation process >>
In cutting overlay pavement construction, replacement pavement construction, new pavement construction, etc., as shown in FIG. 6 (A), a temporary lid 32 is provided so as to close the opening on the manhole base wall 31 installed underground. At the center of the temporary lid 32, a cylindrical engagement hole 32a constituting the engaged means 30 in the present invention is formed so as to protrude downward and around the lower surface of the temporary lid 32. A protruding edge 32b that can be fitted inside the opening when the manhole base wall 31 is attached to the opening protrudes. The upper surface of the engagement hole 32a of the temporary lid 32 is closed by a closing member 33 such as waterproof paper, cloth tape, or plastic lid material, and a paving 34 made of a paving material is applied on the temporary lid 32. In addition, the figure has illustrated the state after temporary pavement, road surface cutting, restoration pavement, etc. were sequentially constructed | assembled on the temporary cover 32 in cutting overlay pavement construction.

After the coordinates of the virtual cutting center P passing through the engagement hole 32a of the temporary lid 32 are positioned on the surface of the pavement 34 by the offset surveying method based on the distance data and displayed on the road surface, FIG. As shown in (B), a punching machine 35 is installed on the road surface of the pavement 34, and the guide hole 36 having a diameter of 150 mm, for example, communicates with the engagement hole 32a of the temporary lid 32 at the cutting center P of the pavement 34. Is drilled as an operating cavity in the present invention. Before or after the guide hole 36 is drilled, the closing member 33 that has closed the upper surface of the engagement hole 32a of the temporary lid 32 is removed or opened by detachment or breakage, and before proceeding to the next circular cutting process. From the opening of the hole 36, it is confirmed by visual observation or the like through the guide hole 36 that the opening and the engagement hole 32a of the temporary lid 32 are on the same cutting center axis M.

As shown in FIG. 7 and as shown in an enlarged view of FIG. 14 (A), a stone strike holder 37 is installed at the opening of the guide hole 36. The stone thrusting holder 37 is a base 37a that is in contact with the opening of the guide hole 36, and is projected on the base 37a and presses the stone thrusting part 1a of the center shaft 1 by contact between the conical surfaces. The holding portion 37b to be held and the operation hole 37c penetrating along the cutting center axis M so that the pulling rod 11 can be inserted through the base 37a and the receiving portion 37b.

《Circular cutting process》
<Engagement between engaging means and engaged means>
The first circular cutting device is used as the circular cutting device, the non-split type is used as the pulling rod, and the engaging means is the same type as the engaging means according to the above-described embodiments (1) to (3). Things are used.

As shown in FIG. 7, the center shaft 1 of the first circular cutting device is moved by the boom 2 of the crane truck, which is the support moving means, and the center shaft 1 rotates as the engaging means at the tip of the pulling rod 11. The engaging piece 11 a is provided and is erected along the cutting center axis M on the pavement 34 including the temporary lid 32.

Subsequently, as shown in FIG. 8, the pulling rod 11 extending from the lower end of the center shaft 1 is inserted into the guide hole 36 through the operation hole 37 c of the stone thrust retainer 37, and the tip of the pulling rod 11 is the temporary lid. After passing through the center hole 32a of the 32, the turning engagement piece 11a as the engagement means is rotated so as to take the extended posture from the vertical position to the horizontal position, and the temporary lid 32 is the center as the engaged means. Engaged with and engaged with the hole 32a.

<Pinching pressure, gripping and circular cutting operation of temporary lid inner pavement>
While the engaging means and the engaged means are engaged in the manner as described above, the pulling rod 11 is urged in the contracting direction, while the stone thrusting portion 1a at the lower end of the center shaft 1 is the stone thrusting retainer. 37 is pressed and held by the receiving portion 37b. That is, the pavement 34 including the temporary lid 32 is pressed and held on the cutting center P at the opening of the guide hole 36 through the stone strike holder 37 under the above state. The center shaft 1 is clamped and gripped from above and below by the pulling rod 11 that is engaged with the pivot engagement piece 11a at the tip end in the center hole 32a of the temporary lid 32 and biased in the contraction direction. In the above case, for further stabilization of the circular cutting device, as shown in the figure, the reaction force receiving frame 21 includes the telescopic cylinder portion 24 and the adjustment base portion of each leg portion 23 as required. 25 is adjusted as appropriate, and each adjusting table 25 is brought into contact with the surface of the pavement 34 in the outer region of the circular cut.

Subsequently, as shown in FIG. 9, the cutting bit 9 is composed of the hydraulic motor 5 and the hydraulic cylinder 10 under the state where the paving 34 including the temporary lid is clamped and gripped by the center shaft 1 and the pulling rod 11. It is rotated on the central shaft 1 by the bit driving means and propelled in the axial direction, whereby the pavement 34 including the temporary lid is cut into a circular shape from the road surface to a depth near the temporary lid 32.

<< Breaking / Edge Cutting Process >>
After the circular cutting, as shown in FIG. 10, the cutting bit 9 is raised and detached from the circularly cut cutting pavement plate 34 a, so that each adjustment stand 25 of the reaction force receiving frame 21 is on the surface of the pavement 34. A pulling rod in which a cutting pavement plate 34a containing the temporary lid 32 is abutted on the outer side of the circular cut and is engaged with the rotation engaging piece 11a at the tip in the center hole 32a of the temporary lid 32. 11 and the stone thrusting portion 1a is separated from the cutting pavement plate 34a substantially from the receiving portion 37b of the stone thrusting retainer 37 by a required distance, so that the retractable stroke of the lifting rod 11 is secured. Under the condition, the pulling rod 11 is urged in the contracting direction via the reaction force receiving frame 21, and the cut paving plate 34a of the temporary lid inclusion is integrated with the range of the retractable stroke. Pulled in, breaking from the peripheral stationary member, is edge cutting.

As an operation for securing the retractable stroke of the pull-up rod 11 in the breaking / edge cutting step, for example, as shown in FIG. After the corresponding required length has been advanced, the central shaft 1 may be lifted together with the pulling rod 11 to engage the rotational engagement piece 11a with the central hole 32a of the temporary lid 32, or FIG. As shown in (B), the required thickness corresponding to the retractable stroke d, which is detachably provided in advance between the inner area of the circular cutting of the pavement 34 and the stone thrusting portion 1a in the circular cutting step. It is also possible to remove the spacer 38. In the case where the stone thrusting part 1a is held in the inner area of the circular cut of the pavement 34 via the stone thrusting holder 37, the spacer 38 is usually provided between the stone thrusting holder 37 and the pavement 34. It is interposed between the inner area of the circular cut.

On the other hand, in the breaking / edge cutting step, the pulling rod 11 is urged in the contracting direction via the reaction force receiving frame 21 in a state where the retractable stroke of the pulling rod 11 is secured. As shown in FIG. 11 (C), the cutting pavement plate 34a is inserted into the central shaft 1 and the central hole 32a of the temporary lid 32 that press and hold the stone protrusion 1a in the inner area of the circular cutting. Each leg portion of the reaction force receiving frame 21 is sandwiched and gripped from above and below by the pulling rod 11 that is engaged with the turning engagement piece 11a at the tip and biased in the contraction direction. It is also possible to force the jack 39 to be jacked up by a required distance in the outer region of the circular cutting.

In the breaking / edge cutting step, a second circular cutting device is used to pull up the movable shaft portion of the central shaft with respect to the main shaft portion to break / edge the cutting pavement plate 34a from the peripheral fixing member. An alternative method will be described later with reference to FIGS. 30A to 30J and FIGS. 31A and 31B.

《Movement / removal process》
After the rupture and edging step, the cut and paved slab 34a of the temporary lid is cut into a stone at the lower end via a butt holder 37 at the opening of the guide hole 36 as shown in FIG. From above and below, the center shaft 1 that presses and holds the protrusion 1a and the pull-up rod 11 that is engaged with the rotation engagement piece 11a at the tip of the center hole 32a of the temporary lid 32 and biased in the contraction direction. Under the clamped and gripped state, the central shaft 1 is driven by the boom 2 of the crane truck as a support moving means, and the cut pavement plate 34a of the temporary lid inclusion is integrally lifted and moved and removed to the required position. Is done.

In the moving / removing step, the cut and paved cut paving plate 34a of the temporary lid is sandwiched and gripped from above and below by the central shaft 1 and the pulling rod 11 as described above. Instead of being moved down and removed, the stability is inferior. However, as described above, the suspension is suspended only by the pulling rod 11 having the rotation engaging piece 11a at the tip engaged with the center hole 32a of the temporary lid 32. It can also be moved and removed by the central shaft 1 under supported conditions.

<< Deformation of temporary lid >>
Instead of the temporary lid 32 as described above, for example, a multilayer temporary lid 232 as shown in FIGS. 13 (A) and (B) may be embedded. It is basically removed according to the removal method.

That is, in the same figure (A), the multilayer temporary lid 232 has a substrate portion 233 mounted on the manhole base wall 31 so as to close the opening, and a required thickness on the substrate portion 233. A plurality of adjustment plate portions 235 that are detachably stacked with bolts and nuts 234, and a cylindrical first center hole 233a that is formed in the center of the substrate portion 233 so as to protrude downward. The adjustment plate portion 235 includes a second center hole 235a drilled so as to communicate with the first center hole 233a. Around the lower surface of the substrate portion 233, an opening portion of the manhole base wall 31 is formed. A convex edge portion 233b that can be fitted inside the opening is provided in a projecting manner. The first center hole 233a in the multilayer temporary lid 232 is used as an engaged means in the present invention, and the second center hole 235a is an operation cavity in the present invention together with the drilled guide hole 36. It is composed.

Bolt holes 236 through which bolts 234a can be inserted are formed in the substrate portion 233 and the plurality of adjustment plate portions 235 around the first center hole 233a and the second center hole 235a and at equal angles from each other. In addition, a plurality of places such as three places, four places, and the like, and at the upper end of the bolt hole 236 of each adjustment plate portion 235, when the adjustment plate portion 235 is arranged in the uppermost layer, the bolt 234a In order to prevent the head from projecting upward and obstructing the pavement construction on the adjustment plate portion 235, the bolt 234a and the nut 234b are fixed to the base plate portion 233 and the plurality of adjustment plate portions 235 when the bolts 234a are stacked and fixed. A countersink is drilled in such a width and depth that the head can be immersed inside.

Further, the second center hole 235a of the uppermost adjustment plate portion 235 in the multilayer temporary lid 232 is closed by the closing member 33 as described above, and the outer peripheral surface of the multilayer temporary lid 232 and the existing pavement 34 are For the boundary with the inner cross section, if necessary, an appropriate material that can withstand high temperatures during subsequent paving work and does not involve strong adhesion between both facing surfaces, such as a heat-resistant elastic material (not shown) ) Is filled.

In the circular cutting step, as shown in FIG. 5B, the first center hole 233a and the second center hole of the multi-layer temporary lid 232 are formed at the cutting center P of the pavement 34 by the same operation as described above. A guide hole 36 communicating with 235a is formed, and the closing member 33 closing the second central hole 235a of the uppermost adjustment plate 235 is removed by detachment, destruction, etc. The pavement 34 including the lid 232 is cut to a depth near the uppermost adjustment plate 235 from the road surface by the same operation as described above.

《Deformation mode of stone thrusting part》
As described above and as shown in FIG. 14A, the inverted frustoconical stone thrusting portion 1a at the lower end of the center shaft 1 is pressed to the opening of the guide hole 36 in the pavement 34 via the stone thrusting retainer 37. Instead of holding, for example, as shown in FIGS. 14 (B) and 14 (C), another embodiment of the thrusting

portions

201a and 211a provided in the central shaft 1 is directly at the opening of the guide hole 36 or at the periphery thereof. It is also possible to press and hold it.

The stone thrusting portion 201a shown in FIG. 14 (B) is from a disk-shaped base that is extended at the lower end of the central shaft 1 so as to be able to directly contact the opening of the guide hole 36 and through which the lifting rod 11 can be inserted. 14C is fixed to the lower side portion of the central shaft 1 so as to be able to directly contact the periphery of the opening of the guide hole 36 and to allow the pull-up rod 11 to be inserted therethrough. It consists of a cylindrical base.

[Removal method of underground structure consisting of manhole cover frame (1)]
<< Preparation process >>
In the height adjustment paving work of the manhole cover receiving frame, as shown in FIG. 15 (A), the manhole cover receiving frame 42 is placed on the manhole base wall 31 installed in the basement via the height adjusting material 41. The pavement 34b is filled in the gap around the human hole lid receiving frame 42 so as to be aligned and integrated with the existing pavement 34. The human hole lid receiving frame 42 and the height adjusting material 41 include A large-diameter central hole 43 as a human hole is originally provided, and this is used as it is as an operation cavity in the present invention.

As shown in FIG. 15B, when the manhole cover receiving frame 42 is fastened together with the height adjusting member 41 on the manhole base wall 31 by embedded bolts and nuts 47 as connecting members. The embedded bolt 47a is cut or broken in advance.

In the center hole 43, as shown in FIG. 16, an expanded wedge member 44 as an engaged means presses the wedge bodies 44a at both ends into the lower end of the height adjusting member 41 with a fluid pressure, thereby the height adjusting member. An engagement hole 45 a is drilled along the cutting center axis M in a mounting arm 45 that is bridged and fixed in a diameter direction to 41 and provided at the top of the extended wedge member 44.

At the opening of the central hole 43, a stone strike holder 46 is installed. The stone holder 46 is attached to a stepped portion around the manhole cover receiving frame 42 in the opening of the central hole 43, protrudes upward in a spherical shape, and is an opening window (not shown) for seeing inside the central hole 43 and various operations. A circular base 46a provided with an omission), a receiving portion 46b that protrudes on the base 46a and presses and holds the stone protrusion 1a at the lower end of the center shaft 1 by contact between the conical surfaces, and a base 46a And an operation hole 46c that penetrates the receiving portion 46b along the cutting center axis M so that the pulling rod 11 can be inserted. The stone strike holder 46 is attached to a stepped portion around the manhole cover receiving frame 42 at the opening of the central hole 43 and covers the inner area of the circular cut beyond the opening of the central hole 43. There may be.

Before proceeding to the next circular cutting step, the operation hole 46 c of the stone thruster 46 extends from the operation hole 46 c on the same cutting center axis M as the engagement hole 45 a of the extended wedge member 44 disposed in the central hole 43. It is confirmed visually or the like.

As shown in FIG. 17, when the manhole cover receiving frame 42 is fastened together with the height adjusting member 41 on the manhole base wall 31 by an embedded bolt / nut 47 as a coupling member, the embedded bolt 47a is cut or broken in advance. The cutting or breaking may be performed by a dedicated cutting machine. On the other hand, the wedge bodies 44a at both ends of the extended wedge member 44 are press-fitted to the lower end of the height adjusting member 41 by fluid pressure, and the diameter of the height adjusting member 41 is reduced. When bridging and fixing in the direction, the embedded bolt 47a may be cut or broken by press-fitting the wedge body 44a at the same time.

As shown in FIGS. 16 to 17, the center shaft 1 of the circular cutting apparatus is moved by the boom 2 of the crane truck as the support moving means, and the center shaft 1 is already described as the engaging means at the tip of the pulling rod 11. Such a rotation engaging piece 11a is provided and is erected along the cutting center axis M on the pavement 34 including the manhole cover receiving frame 42.

Subsequently, as shown in FIG. 18, the pulling rod 11 extending from the lower end of the central shaft 1 is inserted through the operation hole 46c of the stone thrusting holder 46 into the central hole 43 which is an operation cavity, and the pulling rod When the tip of 11 passes through the engagement hole 45a of the expansion wedge member 44, the rotation engagement piece 11a is rotated as an engagement means so as to take an expanded posture from the vertical position to the horizontal position, and the engagement means The expansion wedge member 44 is engaged with the engagement hole 45a.

<Negative pressure, gripping and circular cutting operation of pavement inside manhole cover receiving frame>
While the engaging means and the engaged means are engaged in the manner as described above, the pulling rod 11 is urged in the contracting direction, while the stone thrusting portion 1a at the lower end of the center shaft 1 is the stone thrusting retainer. It is pressed and held by the receiving portion 46b of 46. That is, under the above state, the pavement 34 including the manhole cover receiving frame is pressed and held on the cutting center P at the opening of the central hole 43 by pressing the stone thrusting portion 1a at the lower end via the stone thrusting holder 46. The center shaft 1 and the engaging rod 45a of the expansion wedge member 44 are engaged with the turning engagement piece 11a at the tip and are pulled and gripped from above and below by the pulling rod 11 biased in the contraction direction. In the above case, for further stabilization of the circular cutting device, as shown in the figure, the reaction force receiving frame 21 includes the telescopic cylinder portion 24 and the adjustment base portion of each leg portion 23 as required. 25 is adjusted as appropriate, and each adjusting table 25 is brought into contact with the surface of the pavement 34 in the outer region of the circular cut.

Subsequently, as shown in FIG. 19, the cutting bit 9 is connected to the hydraulic motor 5 and the hydraulic cylinder 10 while the pavement 34 including the manhole cover receiving frame is clamped and gripped by the center shaft 1 and the pulling rod 11. The bit drive means is rotated on the central shaft 1 and propelled in the axial direction, whereby the pavement 34 including the manhole cover receiving frame is cut into a circle from the road surface to a depth near the manhole base wall 31.

<< Breaking / Edge Cutting Process >>
After the circular cutting, as shown in FIG. 20, the cutting bit 9 is lifted and separated from the cut pavement plate 34 a that has been circularly cut, so that each adjustment base 25 of the reaction force receiving frame 21 is on the surface of the pavement 34. The cutting pavement plate 34a containing the manhole cover receiving frame 42 is brought into contact with the engaging hole 45a of the extended wedge member 44 while being abutted on the outer side of the circular cutting, and the rotation engaging piece 11a at the tip is engaged. The lifting rod 11 is supported by the lifting rod 11 and the stone thrusting portion 1a at the lower end of the central shaft 1 is separated from the cutting pavement plate 34a by a required distance substantially from the receiving portion 46b of the stone thrusting retainer 46. In a state in which the retractable stroke is secured, the pulling rod 11 is urged in the contracting direction via the reaction force receiving frame 21 and thereby the cut pavement plate 34 containing the manhole cover receiving frame. There drawn up within the shrinkable stroke integrally break from the peripheral stationary member, it is edge cutting.

11A to 11B, which can be applied to the above-described breakage and edging of the cut pavement plate 34a with the temporary lid, as described above. The means shown in (C) and the means shown in FIGS. 30A to 30J and FIGS. 31A and 31B can be applied.

《Movement / removal process》
After the rupture and edging step, the cut and paved slab 34a including the human hole lid receiving frame is lowered to the opening of the central hole 43 via a butt holder 46 as shown in FIG. The pulling rod 11 is engaged with the pivoting engagement piece 11a at the tip and urged in the contraction direction in the engagement shaft 45a of the expansion wedge member 44 and the central shaft 1 that presses and holds the stone protrusion 1a. The center shaft 1 is driven by the boom 2 of the crane truck, which is the supporting and moving means, and the cut pavement plate 34a included in the manhole cover receiving frame is integrally lifted in a state of being clamped and gripped from above and below, Moved to the required position and removed.

In the moving / removing step, the cut and paved slab 34a containing the human hole lid receiving frame is sandwiched and gripped from above and below by the central shaft 1 and the lifting rod 11 as described above. The pulling rod 11 is inferior in stability instead of being moved and removed under the above-mentioned condition, but has the turning engagement piece 11a at the tip engaged with the engagement hole 45a of the extended wedge member 44 as described above. It can also be moved and removed by the central shaft 1 in a state where it is suspended and supported only by it.

Further, the extended wedge member 44 of the engaged means is not limited to the lower end of the height adjusting member 41 as required, and for example, the middle of the height adjusting member 41, the upper end or the boundary of the upper and lower height adjusting members 41 For example, it may be attached to any part of the height adjusting member 41. In addition, the engaged means may be fixed to the human hole cover receiving frame 42 instead of the height adjusting member 41 as necessary. In this case, the engaged means is connected to the human hole cover receiving frame 42. A structure that can be fixed to the inner wall, for example, an expansion bar that is expanded in the radial direction by fluid pressure or the like and press-engaged with the inner wall of the manhole cover receiving frame 42 is appropriately employed.

<< Deformation of engagement means >>
For example, as shown in FIG. 22, a wedge body at both ends within the central hole 43 is provided in the pulling rod 11 instead of providing the rotating engaging piece 11a as an engaging means at the tip of the pulling rod 11. An extended wedge member 48 having a structure similar to the previously described extended wedge member 44 may be provided so that 48a can be press-fitted into a required portion of the height adjusting member 41 by fluid pressure. In this case, the extended wedge member may be provided. 48 acts as an engaging means, and the height adjusting member 41 itself becomes the engaged means.

That is, as shown in FIG. 22, in the circular cutting step, the crane is moved by the boom 2 of the crane truck, and stands along with the center shaft 1 along the cutting center axis M on the pavement 34 containing the manhole cover receiving frame. An extension wedge member 48 as an engagement means is passed through the operation hole 46c of the stone thrust retainer 46 at the tip of the lifting rod 11 provided, and the axis of the extension wedge member 48 is attached to the top mounting arm 49. It is suspended in a substantially horizontal direction via a connector 49a so as to be displaceable in the direction.

Subsequently, as shown in FIG. 23, the lifting rod 11 is connected to the distal end of the expansion wedge member 48 so as to be displaceable in the axial direction, and in the center hole 43 in a state of penetrating and holding the stone thrusting holder 46 thereabove. As a result, the stone holder 46 is installed at the opening of the central hole 43 with its base 46a mounted on the peripheral stepped portion of the manhole cover receiving frame 42, and the extended wedge member 48 is attached to both ends. The wedge body 48a is disposed in the central hole 43 so as to oppose the lower end of the height adjusting member 41 so as to be press fitable.

Subsequently, as described above, the extended wedge member 48 suspended so as to be axially displaceable at the tip of the pulling rod 11 is fluid pressure applied to the lower end of the height adjusting member 41 using the wedge bodies 48a at both ends as the engaged means. And the height adjusting member 41 is engaged so as to be bridged in the diametrical direction, and at the same time, the pulling rod 11 is urged in the contracting direction, while the stone thrusting portion 1a at the lower end of the center shaft 1 is As a result, the pavement 34 containing the manhole cover receiving frame is moved between the central shaft 1 and the lifting rod 11 in the same manner as the process shown in FIG. It is clamped and gripped from above and below, and the process proceeds to the next process in the same manner as each process shown in FIGS.

The expansion wedge member 48 of the engaging means is not limited to the lower end of the height adjusting material 41 as required, and for example, the middle of the height adjusting material 41, the upper end, the boundary between the upper and lower height adjusting members 41, or the like. The height adjusting member 41 may be engaged with any part as an engaged means. Further, the engaging means may be engaged not with the height adjusting member 41 but with the human hole cover receiving frame 42 as necessary, and in this case, the engaging means is an inner wall of the human hole cover receiving frame 42. For example, an expansion bar or the like that is expanded in the radial direction by fluid pressure or the like and press-engaged with the inner wall of the human hole cover receiving frame 42 is appropriately employed.

《Deformation of moving removal》
In addition, although illustration is abbreviate | omitted, in the said movement and removal, it is also possible to use the circular cutting device based on this invention in the aspect different from the above. For example, an engagement hole similar to the engagement hole 45a is formed on the back surface side of the operation hole 46c of the stone strike holder 46, and the stone strike retainer 46 and the extended wedge member 44 are bridged with a screw member or the like. In addition, the cut pavement plate 34a included in the human hole cover receiving frame is pressed up and down to engage the engaging piece 11a of the pulling rod 11 in the engaging hole of the stone thrusting holder 46, and the stone A crane vehicle in which the center shaft 1 is a supporting and moving means in a state where the thrust holder 46 is clamped and gripped from both sides by the stone thrusting portion 1a of the center shaft 1 and the engaging piece 11a of the pulling rod 11. The boom 2 can be lifted and moved to a required position and removed.

[Removal method of underground structure consisting of temporary lid (2)]
<< Preparation process >>
As in the case of the above-described method (1) for removing underground structures composed of temporary lids, and as shown in FIGS. 6 and 24 to 26, on the base wall 31 of the manhole installed in the basement. A temporary lid 32 is mounted so as to close the opening, and a guide hole 36 communicating with the

engagement holes

32a and 132a of the temporary lid 32 is formed on the surface of the pavement 34 as an operation cavity in the present invention. At the opening of the guide hole 36, a stone thrusting holder 37 to be installed in a required process is prepared.

《Circular cutting process》
<Engagement of engaging means and engaged means 1>
The first circular cutting device is used as the circular cutting device, the split type is used as the pulling rod, and the same type as the engaging means according to the above-described embodiment (4) is used as the engaging means. .

(1-1) Configuration of engagement hole and extension rod portion of temporary lid As shown in FIG. 24 (B-1), a guide hole 36 is formed in the pavement 34 as an operation cavity, and the bottom portion thereof is formed. A part of the temporary lid 32 and the engaging hole 32a are exposed so as to be visible. Further, as shown in FIG. 24 (B-2), the engagement hole 32a has an expansion hole 32c expanded outward in the diameter direction, and these cooperate to constitute the engaged means 30 in the present invention. To do.

On the other hand, the extension rod portion 13 constituting the pull-up rod 11 has an intermediate adjusting portion 14 and the engaging action portion 14 as shown in FIG. 24 (A-1) and FIG. 24 (A-2) obtained by rotating the drawing rod 90 degrees. The bolts 18b are drilled at the upper end of the engaging action portion 14 through the screw coupling mechanism 18, that is, through the bolt holes 18a drilled at the lower end of the intermediate adjusting portion 15. It is detachably connected by being screwed to the female screw 18c. In addition, for positioning between the two at the time of connection, a pin 18d that is bridged in the diametrical direction to the engaging action portion 14 and a groove 18e that is pierced in the diametrical direction in the intermediate adjustment portion 15 are provided. Mated.

An engaging piece 14a protrudes radially at the end of the engaging action portion 14, and a stopper portion 14b bulges radially in a position spaced from the engaging piece 14a in the rod axis direction. Further, on the side opposite to the engaging piece 14a with respect to the stopper portion 14b, the floating portion 14c is loosely fitted so as to be non-rotatable and movable in the rod axis direction within a range not exceeding the stopper portion 14b. The locking piece 14d is provided along the rod axis direction so as not to interfere with the stopper portion 14b at an angular position 90 degrees away from the engagement piece 14a. The said members cooperate and comprise the engaging means 20 in this invention.
The intermediate adjustment portion 15 is provided with a pin hole 19 a for being connected to the main rod portion 12 via a pin connection mechanism 19.

(1-2) Operation from Insertion of Extension Rod Part into Operation Cavity to Engagement between Engagement Means and Engagement Means First, as shown in FIG. The engaging action part 14 separated from the intermediate adjusting part 15 is inserted, and as shown in FIGS. 24C-1 and 24C, the end of the engaging action part 14 is The engaging piece 14a is allowed to pass through the engaging hole 32a of the temporary lid 32 while passing through the expansion hole 32c.

In the above state, as shown in FIG. 24C-2, the engagement piece 14a is not yet engaged with the engagement hole 32a, and the stopper portion 14b is located at the periphery of the engagement hole 32a of the temporary lid 32. The engaging action portion 14 is held in the guide hole 36 so as not to drop, and the locking piece 14d is 90 degrees from the extended hole 32c of the engaging hole 32a of the temporary lid 32. Since it is at a separated angular position, it does not drop into the expansion hole 32c due to gravity and is brought into contact with the periphery of the engagement hole 32a, so that the floating portion 14c has the pavement cross section of FIG. It has moved upward from the position shown in the figure.

Subsequently, as shown in FIGS. 24 (D-1) and (D-2), the engaging action portion 14 held in the guide hole 36 is rotated 90 degrees around the rod axis, The engagement piece 14a is moved to an angular position 90 degrees away from the expansion hole 32c and is engaged with the engagement hole 32a. At the same time, the locking piece 14d is aligned with the expansion hole 32c. And is dropped into and inserted into the expansion hole 32c by gravity, thereby preventing the engagement piece 14a from rotating around the rod axis with respect to the engagement hole 32a.

The engaging action portion 14 is completely accommodated in the guide hole 36 in a state where the engaging piece 14a is engaged with the engaging hole 32a as described above. As shown in FIG. 24 (E), until the start of the next operation, the opening of the guide hole 36 is, for example, a rubber plug or other plug body 16 having an opening operation hole so that traffic on the road surface is possible. Covered temporarily.

Subsequently, in the state where the engagement piece 14a is engaged with the engagement hole 32a as described above, the engagement action portion 14 held inside the guide hole 36 is moved to the position shown in FIG. As shown sequentially in (G), the intermediate adjusting portion 15 is connected via the screw connecting mechanism 18 described above, and the completed extension rod portion 13 is formed.

Further, a stone thrusting holder 37 is provided at the opening of the guide hole 36 through an elastic anti-slip material 37d such as a rubber sheet in the inner area of the circular cut.

(1-3) Operation from the engagement of the engaging means and the engaged means to the connection of the extension rod portion and the main rod portion Next, the pulling rod 11 is moved by the boom 2 of the crane truck as the support moving means. The main rod portion 12 is moved together with the central shaft 1, the cutting bit 9 and the like above the guide hole 36 in the pavement 34, and subsequently, to the intermediate adjusting portion 15 of the extension rod portion 13, As shown in FIGS. 24 (H) and (I) sequentially, they are connected via a pin connecting mechanism 19.

At the lower end of the main rod portion 12, there is a pin hole 19b penetrating in the diameter direction, and a retaining body 19c elastically projecting in the hole diameter direction at the center position in the axial direction inside the pin hole 19b. And a connecting terminal 12a provided to be pivotable about the rod axis with respect to the main rod portion 12. In the pin connecting mechanism 19, the connecting terminal 12a of the main rod portion 12 The upper end of the adjusting portion 15 is fitted so that the pin holes 19a and 19b are aligned, and the pin 19d is driven into the aligned

pin holes

19a and 19b and the retaining ring is inserted into the central annular groove of the pin 19d. The body 19c is elastically inserted.

<Engagement of engaging means and engaged means 2>
The first circular cutting device is used as the circular cutting device, the non-split type is used as the pulling rod, and the same type as the engaging means according to the above-described embodiment (5) is used as the engaging means. The

(2-1) Configuration of the engagement hole and extension rod portion of the temporary lid As in the case of the engagement 1, the pavement 34 is provided with a guide hole 36 as an operation cavity, The joint hole 32a has an expansion hole 32c that extends outward in the diameter direction.
Further, as shown in FIG. 25 (A-1), the extension rod portion 13 constituting the pull-up rod 11 includes an engaging action portion 14 and an intermediate adjusting portion 15, which are the pins as described above. The connection mechanism 19 is detachably connected.

The engaging action portion 14 includes an engaging means 20 similar to the case of the engagement 1 with respect to the engaging hole 32a of the temporary lid 32, and the intermediate adjusting portion 15 includes the main rod portion. The pin hole 19a for connecting to the pin 12 via the pin connecting mechanism 19 as described above is formed in a plurality of stages in the rod axis method, and the lowermost pin hole 19a is connected to the engaging action portion 14 in the above-described manner. It is used for pin connection.

(2-2) Operation from Insertion of Extension Rod Part into Operation Cavity to Engagement between Engaging Means and Engaged Means In the guide hole 36, as shown in FIG. The working portion 14 is inserted in a state of being connected to the intermediate adjusting portion 15 in advance, that is, in a state of being formed in the extension rod portion 13, and further, as shown in FIG. The end portion is allowed to pass through the engagement hole 32a of the temporary lid 32 while passing the expansion hole 32c through the engagement piece 14a. The state is basically the same as the state sequentially shown in FIGS. 24 (B-1) to (C-1) in the engagement 1.

Subsequently, as shown in FIG. 25 (D), the extension rod portion 13 held inside the guide hole 36 is rotated 90 degrees around the rod axis, whereby the engagement piece 14a is It moves to an angular position 90 degrees away from the expansion hole 32c and is engaged with the engagement hole 32a. At the same time, the locking piece 14d is disposed at a position aligned with the expansion hole 32c and the expansion hole 32c. It is dropped by gravity and inserted, and the rotation of the engagement piece 14a around the rod axis with respect to the engagement hole 32a is prevented.

Further, as shown in FIG. 25 (D), at the opening portion of the guide hole 36, a stone thrusting holder 37 is provided in an inner area of the circular cut through an elastic anti-slip material 37d such as a rubber sheet. .
The state is basically the same as the state shown in FIGS. 24D-1 to 24G in the engagement 1.

(2-3) Operation from the engagement of the engaging means and the engaged means to the connection of the extension rod portion and the main rod portion Next, the above-mentioned movement of the pavement 34 above the guide hole 36 is performed. As shown in FIGS. 25 (E) and 25 (F), the main rod portion 12 of the pulling rod 11 uses the uppermost pin hole 19a in the intermediate adjustment portion 15 of the extension rod portion 13. These are connected via the pin connecting mechanism 19 as described above.

As shown in FIG. 25 (A-1), the extension rod portion 13 is a state in which the engaging action portion 14 is connected to the intermediate adjusting portion 15 and the pin connecting mechanism 19 so as to have a required length in advance. As shown in FIG. 25 (A-2), the engaging action portion 14 is integrated in advance with the intermediate adjusting portion 15 so as not to be separated, in other words, an integral extension rod portion. May be used as

<Engagement 3 between engaging means and engaged means>
The first circular cutting device is used as the circular cutting device, the non-split type is used as the pulling rod, and the same type as the engaging means according to the above-described embodiment (6) is used as the engaging means. The

(3-1) Configuration of engagement hole and extension rod portion of temporary lid As in the case of

engagements

1 and 2, a guide hole 36 is formed in the pavement 34 as an operation cavity. Further, the engagement hole 132a has a circular shape as shown in FIGS. 26 (B-1) and (B-2), and does not have the expansion hole 32c as in the case of the

engagements

1 and 2.

Further, as shown in FIGS. 26 (A-1) and (A-2), the extension rod portion 13 constituting the pulling rod 11 includes an engaging action portion 14 and an intermediate adjusting portion 15, and these are: It is detachably connected via the pin connecting mechanism 19 as described above.

As shown in FIGS. 26 (A-1) and (A-2), the engagement action portion 14 has an engagement piece 114a at its end at a position eccentric from the center of gravity in the rod axis direction. When the engaging action portion 14 is suspended as shown in FIG. 26 (A-1), the engaging piece 114a is pivotally mounted in an unbalanced manner through the pivot shaft 114b perpendicular to the axial direction. Unless rotation is constrained from the outside, it expands in the radial direction while rotating to the horizontal position at the maximum due to the difference in moments on both sides of the pivot 114b, and is held in the expanded posture by a stopper (not shown). The engaging piece 114a may be expanded from the hollow inside of the engaging action portion 14.

(3-2) Operation from Insertion of Extension Rod Part into Operation Cavity to Engagement between Engaging Means and Engaged Means In the guide hole 36, FIG. 26 (B-1) and (B-2) As shown in FIG. 4, the engagement action part 14 is inserted in a state where it is connected to the intermediate adjustment part 15 in advance, i.e., formed in the extension rod part 13, and the end of the engagement action part 14 is The engagement piece 14a is allowed to pass through the engagement hole 132a of the temporary lid 32 in a state in which the engagement piece 14a is contracted in the rod axis direction.

After the end of the engaging portion 14 is completely penetrated through the engaging hole 132a together with the engaging piece 14a, the engaging piece 14a is shown in FIGS. 26 (C-1) and 26 (C-2). As shown, it assumes a horizontal posture and engages with the engagement hole 132a.
The state is basically the same as the state shown in FIGS. 3D-1 to 3G in the engagement 1.

(3-3) Operation from the engagement of the engaging means and the engaged means to the connection of the extension rod portion and the main rod portion The opening of the guide hole 36 has an opening as shown in FIG. The stone thrusting holder 37 is provided in the inner area of the circular cut through an elastic anti-slip material 37d such as a rubber sheet.

Subsequently, the main rod portion 12 of the pull-up rod 11 moved above the guide hole 36 in the pavement 34 is connected to the intermediate adjustment portion 15 of the extension rod portion 13 in its uppermost pin hole 19a. As shown in FIGS. 26 (D) and 26 (E) sequentially, they are connected via the pin connecting mechanism 19 as described above.

The split-type pull-up rod 11 composed of the main rod portion 12 and the extension rod portion 13 is equivalent to the non-split-type pull-up rod 11 as described above in a state where the connection is completed as described above. It will have the effect of.

<Pinching pressure, gripping and circular cutting operation of temporary lid inner pavement>
In the state where the engaging means 20 and the engaged means 30 are engaged in the manner of the

engagement

1, 2 or 3 as described above, as shown in FIG. The pulling rod 11 which is pressed and held in the opening of the guide hole 36 via the stone thrusting holder 37 and is connected and completed as described above is contracted with respect to the central shaft 1, Thus, the pavement 34 including the temporary lid is clamped and gripped from both sides by the stone protrusion 1a of the central shaft 1 and the

engagement pieces

14a and 114a of the pulling rod 11.

If necessary, each leg portion 23 of the reaction force receiving frame 21 is appropriately adjusted in length by the telescopic cylinder portion 24 and the adjustment base portion 25 and on the surface of the pavement 34 via each adjustment base portion 25. It abuts in the outer area of the circular cut.

Subsequently, in accordance with the circular cutting operation in the case where the non-split type lifting rod 11 shown in FIG. 9 is used in the above state, that is, the cutting bit 9 is a bit driving means comprising the hydraulic motor 5 and the hydraulic cylinder 10. Is rotated on the central shaft 1 and propelled in the axial direction of the shaft, whereby the pavement 34 including the temporary lid is cut into a circular shape from the road surface to a depth near the temporary lid 32.

<< Breaking / Edge Cutting Process >>
After the circular cutting, the cutting and paving of the circularly cut cutting pavement plate 34a are performed according to the breaking and edge cutting operations when the non-split type lifting rod 11 shown in FIG. 10 is used.

11A to 11 (A) to FIG. 11 (A) to FIG. 11 (A) to FIG. 11 (A) to FIG. 11 (A) to FIG. 11 (A) to FIG. The means shown in (C) and the means shown in FIGS. 30A to 30J and FIGS. 31A and 31B can be applied.

《Movement / removal process》
After the breaking / edge cutting step, the cut paving plate 34a with the temporary lid included is required to be broken and edge-cut according to the movement / removal operation when the non-split type lifting rod 11 shown in FIG. 12 is used. Moved to position and removed.

[Removal method of underground structure consisting of manhole cover frame (2)]
<< Preparation process >>
As in the case of the above-described method (1) for removing the underground structure composed of the manhole cover frame, as shown in FIGS. 15 (A) and 28, the manhole base wall 31 installed in the basement. On top of this, a manhole cover receiving frame 42 is installed via a height adjusting material 41, and a space around the manhole cover receiving frame 42 is filled with a pavement material 34b so as to be aligned and integrated with the existing pavement 34. In the human hole lid receiving frame 42 and the height adjusting member 41, the large-diameter central hole 43 originally arranged as a human hole is used as it is as an operation cavity in the present invention.

In the center hole 43, as shown in FIG. 28, an extended wedge member 44 presses the wedge bodies 44a at both ends into the lower end of the height adjusting member 41 with a fluid pressure, and enters the height adjusting member 41 in the diametrical direction. An engagement hole 45 a is drilled along the cutting center axis M as the engaged means 30 in the mounting arm 45 which is fixed by bridging and provided at the top of the extended wedge member 44. Further, a stone strike holder 46 is installed at the opening of the central hole 43 so as to be attached to a stepped portion around the manhole cover receiving frame 42.

《Circular cutting process》
<Engagement between engaging means and engaged means>
The first circular cutting device is used as the circular cutting device, the split type is used as the pulling rod, and the same type as the engaging means according to the above-described embodiments (4) to (6) is used as the engaging means. Is used.

As shown in FIG. 28, as in the case of the engagements 1 to 3 between the engaging means and the engaged means in the temporary lid described above, the extension rod portion 13 connects the engaging action portion 14 to the intermediate portion. Coupling connected to the adjusting unit 15 in advance or integrated as shown in FIG. 25A-2 or separated from the intermediate adjusting unit 15 as shown in FIG. 24A-2, for example. In the state of only the joint portion 14, the center piece 43 is inserted through the operation hole 46 c of the stone thrust holder 46, and the

engagement pieces

14 a and 114 a at the end of the engagement portion 14 are expanded. It is engaged with the engagement hole 45 a of the wedge member 44. In addition, the said stone thrust holder 46 may be installed after the engagement operation of the said

engagement pieces

14a and 114a and the engagement hole 45a as needed.

Next, the main rod portion 12 of the pulling rod 11 is moved above the central hole 43 in the pavement 34 together with the central shaft 1, the cutting bit 9, and the like by a boom of a crane truck which is a support moving means. 24 (H) and (I), FIGS. 25 (E) and (F), FIGS. 26 (D) and (E), etc., are connected to the extension rod portion 13 via a pin coupling mechanism 19 and the like. Connected.

<Negative pressure, gripping and circular cutting operation of pavement inside manhole cover receiving frame>
In a state where the engaging means 20 and the engaged means 30 are engaged in the manner as described above, the stone thrusting portion 1a of the central shaft 1 is an opening portion of the central hole 43 as shown in FIG. The lifting rod 11 which is pressed and held via the stone thrusting holder 46 and contracted as described above is contracted with respect to the central shaft 1, thereby the inside of the manhole cover receiving frame inclusion. The pavement 34 is clamped and gripped from both sides by the stone protrusion 1a of the central shaft 1 and the

engagement pieces

14a and 114a of the pulling rod 11.

Subsequently, in accordance with the circular cutting operation in the case of using the non-split type lifting rod 11 shown in FIG. 19 in the above state, that is, the cutting bit 9 is a bit driving means comprising the hydraulic motor 5 and the hydraulic cylinder 10. Is rotated on the central shaft 1 and propelled in the axial direction of the shaft, whereby the pavement 34 containing the manhole cover receiving frame is circularly cut from the road surface to a depth near the manhole base wall 31.

<< Breaking / Edge Cutting Process >>
After the circular cutting, the circularly cut cutting pavement plate 34a is broken and edged in accordance with the breaking and edging operation when the non-split type lifting rod 11 shown in FIG. 20 is used.

《Movement / removal process》
After the breaking / edge cutting step, the cut pavement plate 34a of the manhole cover receiving frame inclusion, which is broken and edge-cut according to the movement and removal operation when using the non-split type lifting rod 11 shown in FIG. Is moved to the required position and removed.

[Removal method of underground structure consisting of temporary lid (3)]
<< Preparation process >>
In the same manner as in the above-described method (1) and (2) for removing underground structures composed of temporary lids, and as shown in FIGS. A temporary lid 32 is mounted on the wall 31 so as to close the opening, and a guide hole 36 communicating with the

engagement holes

32a and 132a of the temporary lid 32 is formed on the surface of the pavement 34 as an operation cavity in the present invention. In addition, a stone thrusting holder 37 to be installed in a required process is prepared at the opening of the guide hole 36.

《Circular cutting process》
<Engagement between engaging means and engaged means>
The second circular cutting device is used as the circular cutting device, the split type is used as the pulling rod, and the same type as the engaging means according to the above-described embodiment (6) is used as the engaging means. .
As shown in FIG. 30 (A), the extension rod portion 13 is inserted into the guide hole 36, penetrates the engagement hole 132a of the temporary lid 32, and the engagement piece 114a at the end has a horizontal posture. Presented and engaged with the engagement hole 132a. Further, a stone thrust holder 37 is provided at the opening of the guide hole 36.

Subsequently, the main rod portion 12 of the pulling rod 11 is connected to the extension rod portion 13 as shown in FIG.

In addition to the engaging means according to the embodiment (6), the same type as the engaging means according to the embodiments (4) to (5) can naturally be used as the engaging means.

<Pinching pressure, gripping and circular cutting operation of temporary lid inner pavement>
In the state where the engagement piece 114a and the engagement hole 132a are engaged, as shown in FIGS. 5C and 5D, the stone protrusion 1a of the center shaft 1 is formed in the guide hole. The opening rod 36 is pressed and held through the stone thrusting holder 37, and the pulling rod 11, which has been connected and completed as described above, is contracted with respect to the central shaft 1, thereby the temporary lid. The inner pavement 34 is clamped and gripped from both sides by the stone protrusion 1a of the central shaft 1 and the engaging piece 114a of the pulling rod 11.

Subsequently, under the above state, as shown in FIG. 5E, the cutting bit 9 is rotated on the central shaft 1 by the bit driving means comprising the hydraulic motor 5 and the hydraulic cylinder 10 and is propelled in the axial direction of the shaft. As a result, the pavement 34 including the temporary lid is cut into a circular shape from the road surface to a depth near the temporary lid 32.

<< Breaking / Edge Cutting Process >>
After the circular cutting, the cutting bit 9 is lifted and detached from the circular cut cutting paving plate 34a as shown in FIG. However, as shown in FIG. 4G, the outer surface of the circular cut is brought into contact with the surface of the pavement 34, and the pavement 34 including the temporary lid is placed under the operation of the reaction force receiving frame 21 as described above. The movable shaft of the central shaft 1 as shown in FIG. 5 (H) in a state of being clamped and gripped from both sides by the stone thrusting portion 1a of the central shaft 1 and the engaging piece 114a of the pulling rod 11 The portion 1g is contracted with respect to the main shaft portion 1f, and thereby the cut paving plate 34a of the temporary lid inclusion is integrally pulled up within the range of the contractible stroke, and is ruptured and edged from the peripheral fixing member. FIGS. 30G and 30H showing the breaking and edge cutting operations are enlarged and shown in FIGS. 31A and 31B, respectively.

《Movement / removal process》
After the breaking and edging step, the broken and trimmed paved 34 of the temporary lid includes the stone thrusting portion 1a of the central shaft 1 and the pulling rod as shown in FIGS. 11, the central shaft 1 is driven by the boom 2 of the crane truck as a support moving means, and the cut pavement plate 34 a of the temporary lid is integrally formed. And moved to a required position such as a loading platform of a crane truck, and placed on the two platforms 51.

In addition, it is also possible to carry out the removal method of underground structures consisting of temporary lids using the second circular cutting device and using the non-split type lifting rod according to the method described above. Yes, using the second circular cutting device, using a split-type or non-split-type lifting rod, in accordance with the above-mentioned method, removing the underground structure consisting of the manhole cover frame It is also possible to implement.

The present invention is not limited to the above-described embodiments, and many other various embodiments can be implemented by various modifications, combinations, and the like within the spirit and scope of the present invention. Needless to say.

P Cutting center of pavement M Cutting center axis d Shrinkable stroke 1 Central shaft 1a Stone thrusting part 1b Bracket 1c Bracket 1f Main shaft part 1g Movable shaft part 2 Crane boom (support moving means)
DESCRIPTION OF SYMBOLS 3 Rotating shaft 4 Housing 5 Hydraulic motor 6 Driving gear 7 Driven gear 8 Bit mounting base 9 Cutting bit 9a Cutting tip 10 Hydraulic cylinder 11 Lifting rod

11a Engagement piece 11b Pivot 11c Stopper

11d Crank pin

11e Piston shaft

11f Piston pin

11g Connecting piece

11h Micro camera 11i LED light 11j Liquid crystal monitor 12 Main rod part 12a Connection terminal 13 Extension rod part 14 Engagement action part

14a Engagement piece

14b Stopper part 14c Free movement part 14d Locking piece 15 Intermediate adjustment part 16 Plug body 18 Screw connection mechanism

18a Bolt hole 18b Bolt

18c Female thread 18d Pin 18e Groove 19 Pin coupling mechanism

19a Pin hole

19b Pin hole

19c Retaining body 19d Pin 20 Engaging means 21 Reaction force receiving frame 22 Horizontal beam 23 Leg 24 telescopic cylinder unit 25 control seat portion 30 engaged means 31 Hitoanamotokabe 32 temporary closure (underground structures)
32a engaging hole (engaged means)
32b Convex edge portion 32c Expansion hole 33 Blocking member 34 Pavement 34a Cutting pavement plate 34b Pavement material 35 Punching machine 36 Guide hole (operating cavity)
37 Stone Cage Holder 37a Base

37b Receiving Portion

37c Operation Hole 37d Elastic Anti-Slip Material 38 Spacer 39 Jack 41 Height Adjusting Material 42 Human Hole Lid Support Frame (Underground Structure)
43 Center hole (Cavity for operation)
44 Wedge member 44a Wedge body 45 Mounting arm 45a Engagement hole (engaged means)
46 Stone holder 46a Base

46b Receiving portion

46c Operation hole 47 Embedded bolt / nut 47a Embedded bolt 48 Expanded wedge member 48a Wedge body 49 Mounting arm 49a Connector 51 Mounting base 114a Engagement piece 114b Pivot 132a Engagement hole Combined means)
201a Stone thrusting part 211a Stone thrusting part 232 Double layer temporary lid 233 Substrate part 233a First central hole 233b Convex edge part 234 Bolt / nut 234a Bolt 234b Nut 235 Adjustment plate part 235a Second central hole 236 Bolt hole

Claims

A central shaft, a cutting bit arranged to be rotatable on the central shaft and propelled in the axial direction of the shaft, a support moving means for supporting and moving the central shaft and holding it in a required position, and the cutting bit. The support moving means rotates the central shaft that is erected and held along the cutting center axis on the cutting object by the support moving means and propels it in the axial direction of the shaft, whereby the cutting object is rotated around the cutting center axis. A circular cutting device having at least a bit driving means for cutting the disk in a circular shape and a cutting reaction force receiving means for receiving a rotational reaction force and a propulsion reaction force required for the circular cutting,
A pulling rod is provided on the central shaft so as to be extendable and contractable in the axial direction of the shaft, and an engaging means is provided at an end of the pulling rod, and a stone thrusting portion is extended and contracted at the end of the central shaft. A circular cutting device provided so as to be able to pass through and to generate a pinching pressure with the engaging means of the pulling rod that contracts.
2. The circular cutting device according to claim 1, wherein the pulling rod is coaxial with the central shaft and is provided so as to be extendable and contractible in the axial direction of the shaft, and the shaft axis is detachably attached to the main rod. A circular cutting device comprising an extension rod portion connected in a direction and having the engaging means at an end portion.
3. The circular cutting device according to claim 1, wherein a reaction force receiving frame having three or more legs whose heights are adjustable on the center shaft is in contact with the outer side of the circular cutting. Preferably, a circular cutting device arranged around the cutting bit.
The circular cutting device according to claim 3, wherein the central shaft includes a main shaft portion and a movable shaft portion that is provided on the main shaft portion so as to be extendable and contractible in a shaft axis direction. A circular cutting device in which a force receiving frame is provided, the cutting bit is provided on the movable shaft portion so as to be rotatable and propellable in the shaft axial direction, and the pulling rod is provided to be extendable and contractable in the shaft axial direction.
The circular cutting device according to any one of claims 1 to 4, wherein the device has an operation cavity along the cutting center axis, and is engaged in any part of the operation cavity that passes through the interior. A method of cutting a cutting object provided with a joint means into a circle,
The operation of inserting the pulling rod into the operation cavity and engaging the engaging means of the pulling rod with the engaged member, simultaneously with any preceding operation, or before or after the operation, An operation of providing a stone thrust retainer in the opening of the operation cavity so that the pulling rod can be inserted and receiving and retaining the stone thrust section; and a stone thrust section of the central shaft, The pulling rod is contracted with respect to the central shaft in a state where the engaged means is engaged with the engaging means, The cutting object is clamped and gripped from both sides by the stone thrusting portion of the central shaft and the engaging means of the pulling rod, and the cutting bit is moved by the bit driving means under the state. And spun onto the shaft propelled to the shaft axial direction, whereby the circular cutting method comprising the operations of cutting a circular to the required depth the cutting object from the road surface.
Using the circular cutting device according to claim 3 or 4, the operating means has an operating cavity along the cutting center axis, and the engaged means is provided inside the operating cavity or at any portion passing through the inside. A method of cutting a provided cutting object into a circle,
The operation of inserting the pulling rod into the operation cavity and engaging the engaging means of the pulling rod with the engaged member, simultaneously with any preceding operation, or before or after the operation, An operation of providing a stone thrust retainer in the opening of the operation cavity so that the pulling rod can be inserted and receiving and retaining the stone thrust section; and a stone thrust section of the central shaft, The pulling rod is contracted with respect to the central shaft in a state where the engaged means is engaged with the engaging means, The cutting object is clamped and gripped from both sides by the stone thrusting part of the central shaft and the engaging means of the pulling rod, and each leg part of the reaction force receiving frame is circular in the cutting object. Cutting Under the above condition, the cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft under the above state, and thereby the cutting object is brought to the required depth from the road surface. A circular cutting method comprising a circular cutting operation.
A circular cutting device according to claim 2 or claim 3 dependent on claim 2, wherein the device has an operating cavity along a cutting center axis, and passes through or inside the operating cavity. A method of cutting an object to be cut having an engaged means at an arbitrary position into a circle,
A first operation in which the extension rod portion separated from the main rod portion of the pull-up rod is inserted into the operation cavity and the engaging means of the extension rod portion is engaged with the engaged means, and subsequently the pull-up By the second operation of connecting the main rod portion of the rod to the extension rod portion inside and / or outside of the operating cavity, the pulling rod is inserted into the operating cavity and the pulling rod is engaged. At the same time as any of the preceding operations, or before or after any of the operations for engaging the means with the engaged means, the lifting rod is inserted into the opening of the operating cavity. The operation of providing the stone thrusting portion so as to be able to receive and hold the stone thrusting portion, and the operation of pressing the stone thrusting portion of the central shaft to the opening of the operation cavity through the stone thrusting retainer. The pulling rod is contracted with respect to the center shaft in a state where the engaged means is engaged with the engaging means, whereby the object to be cut is pulled up with the stone thrusting portion of the center shaft and the pulling-up portion. Under the above condition, the cutting bit is rotated on the central shaft by the bit driving means and propelled in the axial direction of the shaft, and thereby the object to be cut is operated. A circular cutting method comprising an operation of cutting an object circularly from a road surface to a required depth.
8. The circular cutting method according to claim 7, wherein, during the first operation, the extension rod portion is completely accommodated in the operation cavity by selecting a length thereof, and the second operation is performed after the end of the first operation. A circular cutting method in which the opening of the operation cavity is temporarily covered until the start of the operation.
9. The circular cutting method according to claim 7, wherein the engagement means includes an engagement piece provided at an end portion of the extension rod portion so as to be expandable in a radial direction, and the engagement piece on the extension rod portion. A stopper portion that bulges in the radial direction at a position spaced apart from the rod axis direction, and an engaged means that is engaged with the engaging means engages the end of the extension rod portion. An end of the extension rod portion is formed when the engagement means and the engaged means are engaged with each other. The engagement hole is formed so as to penetrate only in a contracted state and not to penetrate the stopper portion. A circular cutting method in which the engagement piece is expanded after passing through the engagement hole.
9. The circular cutting method according to claim 7, wherein the engagement means includes an engagement piece projecting radially from an end of the extension rod portion, and a rod from the engagement piece to the extension rod portion. A stopper portion bulged in a radial direction at a position spaced apart in the axial direction, and the extension rod portion, on the opposite side of the engagement piece with respect to the stopper portion, in a range that cannot rotate and does not exceed the stopper portion. A free-moving portion provided so as to be movable in the rod axis direction and receiving a biasing force in the direction of the engaging piece at all times or at least when the engaging piece is disposed below the stopper portion; The floating portion comprises a locking piece provided along the rod axis direction so as not to interfere with the stopper portion at an angular position different from that of the engaging piece, and is engaged with the engaging means on the other hand. Covered The coupling means has an expansion hole through which the engagement piece penetrates, and the engagement rod restricted so as to penetrate the end of the extension rod portion including the engagement piece and not penetrate the stopper portion. When the engaging means and the engaged means are engaged, the end of the extension rod part including the engaging piece is passed through the engaging hole and then the engaging piece is engaged. Rotating with respect to the hole, the engagement piece is arranged at a different angular position from the expansion hole of the engagement hole, and the locking piece is automatically fitted into the expansion hole of the engagement hole by the biasing force. Circular cutting method.
A pavement that includes an underground structure and has an operation cavity along the cutting center axis, and is provided with an engaged means in the inside of the operation cavity or in any part that has passed through the inside. A round cutting step of cutting the road surface to a required depth in a round shape, a cutting and paving plate of the circularly-cut underground structure inclusion from a peripheral fixing member, and a breaking / edge cutting step for cutting the edge; It is a removal method of underground structures consisting of a moving and removing process that moves and removes the cut pavement version of the inside structure of the underground structure that has been cut off,
The circular cutting device according to claim 3 or 4 is used in each of a series of steps from the circular cutting step to the movement / removal step through the breaking / edge cutting step,
In the circular cutting step, the pulling rod is inserted into the operation cavity and the engaging means of the pulling rod is engaged with the engaged means, simultaneously with any preceding operation or Before or after the operation, an operation of providing the stone thrust retainer at the opening of the operation cavity so that the lifting rod can be inserted and the stone thrust portion can be received and retained, and the stone thrusting portion of the central shaft Is pressed and held at the opening of the operation cavity via the stone thrust holder, and the pulling rod is engaged with the engaged means with the engaged means on the central shaft. Contracting, thereby causing the pavement of the underground structure inclusion to be clamped and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod, and under the state, Cut off Bit the center is rotated on the shaft and propelled to the shaft axial direction by the bit driving means, said operation and the pavement of underground structures included cutting the circular to the required depth from the road surface is at least carried out by it,
In the breaking / edge cutting step, the cutting bit is lifted and the circularly-cut underground structure inclusion is cut off from the cut paving plate, and the engaging means is engaged with the engaged means, An operation of securing the retractable stroke of the pulling rod by moving the stone thrusting part upward from the stone thrusting holder by a required distance, and applying each leg of the reaction force receiving frame to the outer area of the circular cutting. Under the above condition, the pulling rod is urged in the contraction direction with respect to the central shaft via the reaction force receiving frame, and the cutting paving plate of the underground structure inclusion is pulled up, At least an operation of breaking and trimming the fixing member is performed,
In the moving / removing step, the stone thrusting portion of the central shaft is pressed and held by the opening of the operation cavity via the stone thrusting retainer, and the pulling rod is held by the engagement means on the cover. With the engaging means engaged, the center shaft is shrunk to thereby cut the cut and paved plate of the submerged structure embedded in the ground shaft. An operation of clamping and gripping from both sides with the engaging means, and an operation of moving the center shaft to a required position by the support moving means and removing the cut paving plate of the underground structure in the state. A method for removing underground structures characterized by being implemented at least.
A pavement that includes an underground structure and has an operation cavity along the cutting center axis, and is provided with an engaged means in the inside of the operation cavity or in any part that has passed through the inside. A round cutting step of cutting the road surface to a required depth in a round shape, a cutting and paving plate of the circularly-cut underground structure inclusion from a peripheral fixing member, and a breaking / edge cutting step for cutting the edge; It is a removal method of underground structures consisting of a moving and removing process that moves and removes the cut pavement version of the inside structure of the underground structure that has been cut off,
The circular cutting device according to claim 4 is used in each of a series of steps from the circular cutting step to the movement / removal step through the breaking / edge cutting step,
In the circular cutting step, the pulling rod is inserted into the operation cavity and the engaging means of the pulling rod is engaged with the engaged means, simultaneously with any preceding operation or Before or after the operation, an operation of providing the stone thrust retainer at the opening of the operation cavity so that the lifting rod can be inserted and the stone thrust portion can be received and retained, and the stone thrusting portion of the central shaft Is pressed and held at the opening of the operation cavity via the stone thrust holder, and the pulling rod is engaged with the engaged means with the engaged means on the central shaft. Contracting, thereby causing the pavement of the underground structure inclusion to be clamped and gripped from both sides by the stone thrust part of the central shaft and the engaging means of the pulling rod, and under the state, Cut off Bit the center is rotated on the shaft and propelled to the shaft axial direction by the bit driving means, said operation and the pavement of underground structures included cutting the circular to the required depth from the road surface is at least carried out by it,
In the breaking and edging step, the cutting bit is raised and the circularly-cut underground structure inclusion is separated from the cut paving plate, and each leg portion of the reaction force receiving frame is outside the circular cutting area. An operation of abutting on the center shaft and pressing and holding the stone thrusting portion of the central shaft to the opening of the operation cavity via the stone thrusting retainer, and the pulling rod to the engagement means. With the engaging means engaged, the center shaft is shrunk to thereby cut the cut and paved plate of the submerged structure embedded in the ground shaft. The movable shaft portion of the central shaft is urged in the contracting direction with respect to the main shaft portion via the reaction force receiving frame under a state of being clamped and gripped from both sides by the engaging means, Raising the cutting pavement middle structure containing, breaking from the peripheral stationary member, and the operation of edge cutting at least performed,
In the moving / removing step, the stone thrusting portion of the central shaft is pressed and held by the opening of the operation cavity via the stone thrusting retainer, and the pulling rod is held by the engagement means on the cover. With the engaging means engaged, the center shaft is shrunk to thereby cut the cut and paved plate of the submerged structure embedded in the ground shaft. At least an operation of moving the center shaft to a required position by the support moving means and removing the cut paving plate of the underground structure is carried out in a state of being clamped and gripped from both sides by the engaging means. The removal method of underground structures characterized by being done.
13. The underground structure removal method according to claim 11 or 12, wherein the underground structure is mounted on a base wall of a manhole installed in the basement so as to close the opening, and above and around the structure. Is a temporary lid with an engagement hole that has been paved and buried entirely under the road surface, and the engagement hole of the temporary lid is used as an engaged means that can engage with the engagement means of the pulling rod In the circular cutting step, a guide hole communicating with the engagement hole of the temporary lid is previously drilled in the pavement of the temporary lid inclusion along the cutting center axis as an operation cavity into which the pulling rod can be inserted. Method of removing the underground structure.
13. The underground structure removal method according to claim 11 or 12, wherein the underground structure is installed through a height adjusting material layer on a base wall of a manhole installed in the basement, and the periphery is paved. A manhole cover receiving frame partially exposed to the road surface and having a central hole communicating with the opening of the manhole base wall in the center, and the center hole of the manhole cover receiving frame includes the pulling rod A ground which is used as an operation cavity for insertion and is provided with an engaged means capable of engaging with an engaging means of the pulling rod on the manhole cover receiving frame or its height adjusting material layer inside the central hole. Medium structure removal method.
13. The underground structure removal method according to claim 11 or 12, wherein the underground structure is installed through a height adjusting material layer on a base wall of a manhole installed in the basement, and the periphery is paved. A manhole cover receiving frame partially exposed to the road surface and having a central hole communicating with the opening of the manhole base wall in the center, and the center hole of the manhole cover receiving frame includes the pulling rod It is used as an operating cavity for insertion, and the manhole cover receiving frame or its height adjusting material layer itself in the central hole is used as an engaged means and the manhole cover receiving frame or its height adjusting material A method for removing an underground structure in which an engaging means capable of engaging with a layer is provided at an end of the pulling rod.
16. The method for removing an underground structure according to claim 14 or 15, wherein, when the manhole cover frame is fastened to a manhole base wall by a coupling member, in the breaking / edge cutting step or the start of the step Before, the construction method of removing the underground structure in which the coupling member is released from binding or cut or broken.
A temporary lid installation step of mounting a temporary lid on the base wall of a manhole installed in the basement so as to close the opening, a temporary pavement construction step of constructing pavement above and around the temporary lid, and the person A circular cutting step of cutting the pavement of the temporary lid inclusion mounted on the hole base wall into a circle; and a breaking / edge cutting step of cutting the edge-cut pavement plate of the temporary lid inclusion from the peripheral fixing member. A movement / removal step of moving / removing the cut and paved slab of the temporary lid containing the fractured and edge-cut from the manhole base wall, and a manhole cover receiving frame on the manhole base wall via a height adjusting material. In the road pavement construction method including at least a human hole lid receiving frame installation process for installing and pavement around it,
A road pavement method in which at least each step from the circular cutting step to the movement / removal step is performed by the underground structure removal method according to claim 13.
A circular cutting step of cutting the pavement of the existing human hole cover receiving frame inclusion installed on the base wall of the human hole basement through the height adjustment material into a circular shape, and the existing human hole cover receiving frame included in the circular cut Breaking and edging process of cutting and cutting edge of the cut pavement plate from the peripheral fixing member, and moving the cut and pavement plate of the existing manhole cover receiving frame included in the breakage and edge cutting and its height adjusting material from above the manhole base wall A road that includes at least a removal / removal process and a human hole cover frame installation process in which a new human hole cover frame is installed on the base wall of the human hole via a height adjusting material and pavement is constructed around the new frame. In the paving method,
A road pavement method in which at least each step from the circular cutting step to the movement / removal step is performed by the underground structure removal method according to any one of claims 14 to 16.