JP2001271966A - Construction method for replacing earthenware pipe and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace an earthenware pipe buried under the ground with a new one by breaking or rupturing the earthenware pipe without cutting and covering tunneling and exerting an impact regardless of the size of a bore and a deformation state. SOLUTION: A replacing device A comprises a reforming part 21 formed such that a size in a vertical direction is increased from the front side toward the rear side and provided with rollers 21b-21d; a cutting part 22 provided with a plurality of cutters 25 formed such that distances from a center to a tip are increased, in order, from the front side toward the rear side in the axial direction of a body 22A; a diameter-expanding part 23 having expanding rollers 23b-23f situated on the outer periphery of a taper-form body 23a between the cutters 25 and in a plurality of positions in an axial direction; and a coupling part 24 provided with a slidably constituted inner cylinder 24a and an outer cylinder 24b and driven by a hydraulic cylinder 26. A contact plate is brought into contact with the rear end part of a fresh pipe and coupled to the coupling part 24 through a coupling rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for renewing a porcelain pipe buried underground with a new pipe, and to an apparatus for renewing a porcelain pipe for performing this method.

[0002]

2. Description of the Related Art Many pipelines are laid underground. In particular, pipelines that drain rainwater or groundwater and have a very old age have a large number of ceramic pipes. (Porcelain pipe). In this pottery tube, it is deformed so as to be crushed by the earth pressure acting for a long time and the alternating load acting on the upper traffic,
With this deformation, the pipeline may be clogged or the amount of drainage may decrease. For this reason, in ducts composed of pottery tubes, pottery pipes are being updated with new pipes represented by fume pipes.

[0003] In the case of replacing a pottery tube buried underground with a new tube, a method of digging along the pottery tube may be adopted. However, this method may adversely affect the traffic situation in the surrounding area, and it is preferable that the method can be updated without cutting. For this reason, a technique has recently been proposed in which a ceramic tube is crushed and the fragments are pushed into the ground to form a tunnel, and a new tube is drawn into the tunnel and renewed.

For example, Japanese Patent Publication Nos. 4-32192 and 4-32193.
The technology disclosed in Japanese Patent Application Publication No. H11-175572 relates to a "buried pipe replacement construction apparatus", in which a new pipe is buried while crushing an existing pipe using an impact type propulsion device. For this reason, an impact crusher is configured by attaching a crushing head having a diameter larger than that of the thruster and having a substantially conical shape to the tip of the impact crusher, and the impact crusher is inserted through a traction member inserted into the existing pipe. In this process, the existing pipe is crushed by applying an impact to the existing pipe, and the new pipe is advanced by a pushing member provided via a connecting member behind the impact crushed body. Instead, a new pipe will be laid. Further, a plurality of steel rods are connected as a traction member.

[0005] Each of the above-mentioned technologies is based on the premise that an impact-type propulsion system is used. The existing pipe is crushed and debris is scattered and pushed into the ground, and a new pipe is laid in the space formed at this time. Things. In particular, the impact type thruster is a known device that has been developed exclusively for the purpose of crushing existing pipes. On the other hand, the solution is to determine how to follow the new pipe.

[0006]

In each of the above techniques, it is premised that the existing pipe is crushed by transmitting an impact to the crushing head by an impact type propulsion device and applying an impact force to the existing pipe from the crushing head. . For this reason, the diameter of the existing pipe that can be crushed is determined by the impact force generated from the impact type thruster, but since the magnitude of this impact force cannot be increased without limit, the diameter of the existing pipe that can be crushed is When the existing pipe is a porcelain pipe, the diameter is limited to about 250 mm, and the diameter generally used is about 50 mm. That is, the above technique has a problem that it can be applied to an existing pipe having a small diameter, but cannot be applied to an existing pipe having a large diameter.

Further, in each of the above-mentioned techniques, while the crushing head and the impact type propulsion device connected to the traction member inserted into the existing pipe are towed, the crushing head is crushed by applying an impact, so that the traction member is inserted. If possible, it can be crushed. Therefore, the existing pipe can be updated to a new pipe regardless of the damaged state of the existing pipe. However, when an existing pipe is crushed by an impact, it is necessary to apply a large impact force to the existing pipe, which causes a problem that noise and vibration are generated.

In order to solve the above noise and vibration problems, it is preferable to break or crush the existing pipe without giving an impact. However, when the existing pipe is a pottery pipe, the pottery pipe buried underground for a long period of time is generally deformed by the influence of the earth pressure acting on it or the load of vehicles passing over it. This deformation state may differ depending on the position even in the same pipeline. For this reason, for example, by pulling only the crushing head in the above-mentioned technology, even if it is attempted to crush the ceramic pipe by expanding the diameter, a very large traction force is required, and crushing by traction is practically impossible. There is a problem, and after all, there is a problem that it has to rely on crushing by impact force.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ceramic tube which can be renewed by breaking or breaking without applying an impact to the ceramic tube regardless of the diameter of the ceramic tube and the deformation state. An object of the present invention is to provide a renewal method and an apparatus for renewing a porcelain tube that implements this method.

[0010]

Means for Solving the Problems In order to solve the above problems, a method for renewing a ceramic pipe according to the present invention is a method for renewing a ceramic pipe buried underground with a new pipe, In the process of inserting a traction rod from one opening side into a conduit composed of a plurality of porcelain pipes, inserting the traction rod into the other opening, attaching an updating device to the traction rod, and pulling the updating device, the porcelain deformed by external force. Push the pipe open and approach the cylindrical shape, forming a substantially straight cutting groove on the inner surface of the ceramic tube approaching the cylindrical shape,
The pottery tube having the cutting groove formed on the inner surface is further broken or broken by further expanding the tube, and further, a new tube is connected to the renewal device, and the new tube is torn or broken and expanded. It is characterized by being laid in the space of a pottery tube.

In the above described method of renewing a porcelain tube, the renewal device is towed by a pulling rod inserted into a conduit made of a plurality of porcelain tubes, and the porcelain tube deformed by the renewal device is spread out from the inside to approach a cylindrical shape. Subsequently, a substantially linear cutting groove is formed on the inner surface of the ceramic tube which has approached the cylindrical shape, and further, the ceramic tube is expanded to be broken into arcuate and long pieces starting from the cutting groove. Alternatively, it can be broken into arcuate pieces.

The arc-shaped piece that has been cut or broken as described above can be pressed into the ground to form a cylindrical space (tunnel) corresponding to the diameter of the pottery tube. Therefore,
By laying a new pipe in the tunnel, the ceramic pipe can be updated to a new pipe such as a fume pipe.

[0013] In the above method, the renewal device and the new pipe are inserted from the connection between the renewal device and the new pipe while the backing material or the sliding material is injected between the new pipe and the ground. Towing is preferred. When the backing material is injected between the renewal device and the new pipe and the ground when pulling the renewal device and the new pipe, the backing material is filled in the void formed in the ground and stabilized. It can be a mountain. Further, when the lubricating material is injected, friction generated between the updating device and the new pipe and the ground can be reduced. Therefore, in the process of pulling the renewal device and the new pipe, if a void formed in the ground is found, or if it is known in advance that a void has been formed in the ground, the backing material In the case where the traction force increases due to the increase in friction during the traction, the traction can be performed while the lubricant is injected.

In the above method, the connecting portion between the updating device and the new pipe is configured to be extendable and contractable, and when the traction resistance increases when the updating device and the new pipe are towed, the connecting portion is extended. Preferably, only the renewal device is towed, and after the connection reaches the extension limit, the connection is reduced and the new tube is advanced.

As described above, by constructing the connecting portion between the updating device and the new pipe so as to be extendable, a great resistance is generated in the updating device and the pulling of the new pipe when the ceramic pipe is updated to the new pipe. In this case, by extending the connection portion with the traction, the traction force is applied only to the updating device, and only the updating device can be towed. Then, when the connection reaches the extension limit, the traction of the updating device is stopped and the connection is reduced, so that a new pipe following the connection can be advanced. In this way, by making the retraction of the renewal device and the advancement of the new pipe following the renewal device into different processes, the ceramic tube can be renewed to a new pipe without requiring a large retraction force.

In the above method, the new pipe is preferably a fume pipe used in the propulsion method. Such a fume pipe has an optimal shape when applied to a propulsion method in advance, so that it can be rationally updated by reducing friction when moving forward in the ground.

Further, in the ceramic pipe updating apparatus according to the present invention, the space is formed by being pulled into the ceramic pipe to be renewed, breaking or breaking the ceramic pipe and pressing the fragments into the ground to form a space. A porcelain pipe updating apparatus for laying a new pipe inside, comprising a straightening means arranged on the front side in the traction direction, a cutting means continuous behind the straightening means, and a diameter expanding means continuous on the rear side of the cutting means. And a connecting means continuous to the rear of the diameter expanding means, wherein the straightening means is formed so that at least the vertical dimension increases from the front side to the rear side, and the cutting means has a predetermined number of outer peripheries of the main body. A cutter body provided with a plurality of cutting blades is arranged at the divided position and in such a manner that the distance from the center to the tip increases in order from the front side to the rear side in the axial direction. The outer circumference of the tapered body is divided at a predetermined angle. And a group of large-diameter rollers arranged between the cutter bodies in the cutting means and at a plurality of positions in the axial direction, wherein the connecting means is provided at a rear end of a new pipe. It has a contact plate that comes into contact and a connecting rod that transmits force to the contact plate.

[0018] In the above-mentioned pipe updating apparatus, since the straightening means arranged on the front side in the towing direction is formed so that at least the dimension in the vertical direction increases from the front side to the rear side, the intended porcelain pipe has a flattened circular shape. Even if the ceramic tube is deformed into an unusual shape, the flattened ceramic tube can be corrected to be close to a cylinder by being pulled inside the ceramic tube. In addition, since the cutting means continuous to the straightening means is arranged so that the distance from the axis of the cutter body to the tip of the cutting blade increases in order from the top, while forming a cutting groove on the inner surface of the pottery tube, The cutting groove can be grown. In addition, since the diameter expanding means continuous with the cutting means has a diameter expanding roller group arranged at a plurality of positions in the circumferential direction and the axial direction of the tapered main body, the pottery tube having the cutting groove formed on the inner surface in the radial direction. This allows the ceramic tube to be torn or broken and the torn or broken piece to be pressed into the ground.

Further, since the connecting means connected to the diameter expanding means has a contact plate and a connecting rod, one end of the connecting rod is connected to the connecting portion and the other end is brought into contact with the rear end of a new pipe. The new pipe can be connected to the updating device by connecting the new pipe to the contact plate. Therefore, by pulling the renewal device and a new pipe connected to the renewal device, the ceramic pipe is torn or broken to form a tunnel to the ground and lay a new pipe in one process. The tube can be updated with a new tube.

In the above-mentioned apparatus for updating a pipe, the straightening means cuts both opposing side surfaces of the cylindrical member into a wedge shape having a reduced size from the front side to the rear side, and abuts the cut surfaces so as to be fixed. It is preferable to include a main body formed as described above, and rollers disposed on at least upper and lower surfaces of the main body.

In the straightening means constructed as described above, the rear end has a cylindrical shape and the front end has an approximate shape of an ellipse having a long axis in the left-right direction and a short axis in the up-down direction. . This shape is similar to the flat shape, which is a deformed shape when the pottery tube is affected by the earth pressure and the load of the vehicle passing over it. Can be inserted into As the porcelain moves in the porcelain tube by traction, at least the rollers arranged on the upper and lower surfaces come into contact with the inner surface of the deformed porcelain tube and push it apart, whereby the deformed porcelain tube can be made closer to a cylinder.

In the above ceramic tube renewing apparatus, it is preferable that the connecting means includes an extendable member configured to be extendable and contractable, and a driving member that expands and contracts the extendable member. In the connecting means, a new pipe connected to the updating device can be advanced and laid as the updating device is towed, without operating the driving member. In particular, when the friction generated between the renewal device and the new pipe and the ground increases, and a large traction force is required, the driving member is operated to extend the telescopic member, so that the traction force is added to the new pipe. , And only the updating device can be towed, without any transmission to the updating device. When the expansion member reaches the extension limit, the driving member is operated to reduce the expansion member, so that a new pipe following the updating device can be advanced. For this reason, even when the frictional resistance increases with the traction, the updating device and the new pipe can be alternately moved to realize smooth traction.

In the above-mentioned ceramic tube updating apparatus, the correction means,
It is preferable that the cutting means and the diameter expanding means are connected to each other so that they can be bent. By configuring the updating device in this manner, even in a case where a pipeline made of a plurality of ceramic pipes is bent under the influence of earth pressure, groundwater pressure, or the load of a vehicle traveling on the ground, etc. , Can follow this bending. For this reason, when the updating device is towed inside the ceramic tube, the ceramic tube can be renewed by breaking or breaking the tube without requiring a large traction force.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above-mentioned renewal method and renewal apparatus, which is an embodiment for renewing a pipe made of a ceramic pipe laid on a railway embankment to a fume pipe, will be described below with reference to the drawings. I do. FIG. 1 is a diagram showing the procedure of the renewal method according to the present embodiment, in which a towing rod is inserted into a target pipeline, a towing device is installed on one side of the pipeline, and a propulsion platform is installed on the other side. It is a figure explaining a state. FIG. 2 is a diagram illustrating a state when the towing is started by inserting the updating device into the pipeline. FIG. 3 is a diagram illustrating a state in which the fume tube is connected to the updating device and is pulled. FIG. 4 is a diagram illustrating a state in which the pipeline is updated by the updating device. FIG. 5 is a diagram illustrating a state in which the update device has reached the vicinity of the end of the pipeline. FIG. 6 is a plan view illustrating the configuration of the updating device and the relationship between the updating device and the ceramic tube. FIG. 7 shows FIG.
FIG. FIG. 8 is a cross-sectional view taken along the line ae in FIG. 7 and is a diagram illustrating a cross-sectional configuration of the updating device. FIG. 9 is a view for explaining an example of a connecting means configured to be extendable.

The porcelain pipe renewal method and renewal apparatus according to the present embodiment are pipes having a plurality of porcelain pipes which are buried in a direction crossing the embankment of a railway and through which rainwater and the like are circulated, and have a diameter. It is possible to replace the ceramic pipe of about 500mm with a new pipe (fume pipe) with the same diameter in one process. In particular, a buried pottery tube is not crushed by an impact force, but a cut groove is formed on the inner surface of the pottery tube, and the pottery tube is torn or broken starting from the cut groove.

When cutting a ceramic tube, the ceramic tube needs to be substantially circular. It is assumed that the pottery tube buried underground is deformed under the influence of earth pressure and the like. For this reason, in the renewal method and the renewal device of the present embodiment, before cutting the porcelain tube, the deformed porcelain tube is straightened and approximated to a cylindrical shape, so that a cutting groove can be formed smoothly and surely and a new groove is formed. The pipe has been updated.

In the present invention, the conduit made of a ceramic tube is
Is not necessarily buried in the embankment of a railway, but may be a conduit for circulating rainwater, groundwater, or sewage buried along a road. In essence, no matter what kind of conduit is used, it is applicable if the tube constituting the conduit is a ceramic tube. Further, the length of the conduit is not limited at all, and is appropriately set within the range of the traction force by the traction device. Therefore, it is possible to lengthen the pipeline to be updated by increasing the traction capacity of the traction device.

First, a method of renewing a ceramic tube will be described with reference to FIGS. As shown in FIG. 1A, a slope 2a of an embankment 3 in which a pipeline 2 composed of a plurality of porcelain pipes 1 is buried is fixed with a sheet pile 4 or the like. And the arrival pit 6 is constructed. At this time, the porcelain tube 1 is exposed in each of the pits 5 and 6 with the excavation of the slope 3a, but the porcelain tube 1 is removed.

Next, as shown in FIG. 2B, a propulsion platform 7 is installed in the starting pit 5 and a traction device 8 is installed in the arrival pit 6. The propulsion pedestal 7 and the traction device 8 are installed such that their central axes coincide with the central axis of the pipeline 2. Further, a towing rod 9 is inserted into the pipeline 2 so as to penetrate the arrival shaft 6 and the starting shaft 5. The towing rod 9 has a length set in advance corresponding to a stroke of a hydraulic cylinder 8a of the towing device 8 described later, and a plurality of towing rods 9 are connected via a coupler 9a. Irrespective of the length of the pipeline 2, it penetrates the pipeline 2 to reach both the pits 5 and 6.

The propulsion table 7 will be described later (see FIGS. 2 and 3).
The update device A and the fume tube 11 are placed, and have a function of guiding the moving direction of the update device A and the fume tube 11 when the update device A is towed. For this reason, it is configured in a guide rail shape using a shape steel sufficiently longer than the length of the updating device A and the fume tube 11.

The towing device 8 includes an updating device A and an updating device A
And the function of pulling the fume tube 11 in the pipeline 2. The structure is not limited as long as it has this function.

The traction device 8 of this embodiment (FIG. 1B, FIG.
Is connected to a pair of hydraulic cylinders 8a arranged in parallel with each other and one end of the hydraulic cylinder 8a, and is provided with a fixing metal fixed at the center to the end of the pottery tube 1 and through which the traction rod 9 is passed. And a transmission member 8c that connects the rods of the pair of hydraulic cylinders 8a and transmits traction through the traction rod 9 at the center.

The traction device 8 is installed in the arrival pit 6 with its level adjusted so that the moving path of the traction rod 9 can substantially coincide with the axis of the pottery tube 1. Therefore, a plurality of outriggers 8d are provided. In addition, in order to support the reaction force at the time of towing, the sheet pile 4 constituting the earth retaining wall is used as a reaction wall, and a plurality of reaction force support members 8e that come into contact with the sheet pile 4 are provided.

Next, the updating device A is mounted on the propulsion platform 7 and assembled, and as shown in FIG. 2, the towing rod 9 is connected to the front end of the updating device A, and thereafter, the updating is performed by operating the towing device 8. The device A is pulled into the pipeline 2. As the updating device A is moved within the ceramic tube 1, the ceramic tube 1 is torn into arcuate pieces in the longitudinal direction, or broken into small arcuate pieces, and the pieces are pushed out to expand the ground. It is possible to press-fit the mountain (fill 3) and form the tunnel 12 with this press-fitting.

As shown in FIG. 3A, when the main part of the updating device A is towed into the pipeline 2 and the rear end is placed on the propulsion table 7, the operation of the towing device 8 is stopped. A connecting rod 13 similar to the traction rod 9 is connected to the rear end of the updating device A, and a hose 15 is connected to the injection pipe 14. In this state, the fume tube 11 is placed on the propulsion base 7 and the front end is updated by the updating device A.
And the connecting rod 13 and the hose 15 are inserted. A push ring serving as a contact plate at the rear end of the fume tube 11.
The fume tube 11 is connected to the updating apparatus A by bringing the push rod 16 into contact with the connecting ring 13 and fixing the connecting rod 13 to the push ring 16 by the coupler 13a. After the fume tube 11 is made to follow the updating device A and connected by the connecting rod 13 in this way, the traction device 8 is operated to connect the updating device A and the fume tube 11 as shown in FIG. 2 tow.

After towing one fume tube 11 as described above, the pressing wheel 16 which is in contact with the rear end of the fume tube 11 is removed. Then, a new fume tube 11 is placed on the propulsion stand 7, a new connecting rod 13 is inserted into the fume tube 11, and connected to the connecting rod 13 corresponding to the fume tube 11 already pulled, and a hose is connected. 15, and then the connecting rod 13 is fixed by bringing the push ring 16 into contact with the rear end of the new fume tube 11 on the propulsion base 7, and the embankment 3 has already been filled.
A new fume tube 11 is connected to the fume tube 11 that is being pulled. By operating the traction device 8, the updating device A and the two fume tubes following the updating device A are operated.
Tow 11

After the new fume tube 11 is pulled into the embankment 3, the operation of connecting the new fume tube 11 to the fume tube 11 and pulling the same is repeated, whereby the pottery tube 1 buried in the embankment 3 is removed. It is possible to break or break by the renewal device A and press the fragments into the embankment 3 to form a tunnel 12 and to renew the tunnel 12 by pulling the fume tube 11. In addition, with the towing of the new fume pipe 11 into the embankment 3, the towing device 8 removes the towing rod 9.

In a pipeline buried underground, voids may be formed around the ground due to land subsidence or the like, regardless of whether the pipeline is buried in an embankment or under a road. is there. In such a case, as shown in FIG. 4, when the renewal device A and the fume tube 11 are towed, a backing material is supplied from a backing material supply device (not shown) to the injection tube 14 while the backing material is supplied. By injecting into the embankment 3 from 14, it is possible to fill the void formed around the pipe line 2 with the backing material.

When the frictional resistance between the renewal device A and the fume tube 11 is increased due to an increase in frictional resistance between the embankment 3 and the embankment 3, an excessive traction force is required. Supply to the injection tube 14 and the injection tube
It is possible to reduce the frictional resistance generated between the renewal device A and the fume tube 11 and the embankment 3 by injecting the sliding material between the renewal device A and the fume tube 11 and the embankment 3 from 14. .

As described above, the updating device A and the fume tube 11 are pulled by the pulling device 8, and when the updating device A arrives at the arrival pit 6 as shown in FIG. Alternatively, they are collected while being dismantled sequentially from the front side. Then, when the front end of the leading fume tube 11 following the updating device A faces the arrival pit 6, the pipeline 2 composed of a plurality of ceramic tubes 1 has been updated to the pipeline 2 composed of a plurality of fume tubes 11. Becomes

Next, the configuration of the updating apparatus A will be described with reference to FIGS.
This will be described more specifically with reference to FIG. Updating device A is traction device 8
As shown in FIG. 8 (a), the rectification unit 21 as a correction means for bringing the deformed porcelain tube 1 closer to a cylindrical shape with the traction by
(B), a cutting portion 22 serving as a cutting means for forming a plurality of cutting grooves 1a on the inner peripheral surface of the ceramic tube 1, and (c) and (d) as shown in FIGS. A diameter-expanding portion 23 serving as a diameter-expanding means for expanding the porcelain pipe 1 having the cutting groove 1a formed in the diameter direction by expanding in a diameter direction to break or break, and press-fitting the broken or broken piece 1b into the embankment 3; It has a connecting portion 24 serving as connecting means for connecting the fume tube 11 which is a simple tube.

The straightening section 21 has a function of correcting deformation of the porcelain tube 1 which is assumed to be caused by the influence of earth pressure or a vehicle passing on the ground, and includes a main body 21a and at least a vertical direction of the main body 21a. , And rollers 21b to 21d arranged on the surface.

In particular, the deformation that occurs in the ceramic tube 1 often occurs when the ceramic tube 1 is crushed from above. For this reason, the main body 21a is formed in a shape similar to an ellipse with the rear end side being substantially circular and the front end side having a long axis in the left-right direction and a short axis in the up-down direction. In such a shape, the opposing side surfaces of the cylindrical member are cut from the front side to the rear side into a wedge shape having a reduced size, and a force is applied to the upper and lower surfaces so that the cut surfaces are brought into contact with each other. It is possible to form by fixing the cut surface made by means such as welding.

The rollers provided on the main body 21a are for correcting the deformed porcelain tube so as to approximate a cylindrical shape, and the above functions can be substantially satisfied by arranging the rollers vertically. For this reason, in this embodiment, two sets of rollers 21b and 21c are arranged on the upper and lower inclined surfaces of the main body 21a, and four sets of rollers 21d are arranged on the upper and lower surfaces and on both side surfaces in a substantially parallel portion at the rear end. are doing.

In the straightening unit 21 configured as described above, when the porcelain tube 1 is deformed, the rollers 21b to 21d are selectively turned on the inner surface of the porcelain tube 1 as the inside of the pipeline 2 is pulled. , And it is possible to straighten the deformed porcelain tube 1 by pushing it open.

The main body 22a of the cutting section 22 is provided with a cutter 25 at a predetermined position on the outer periphery (in this embodiment, divided into four positions, each of which is approximately 45 degrees obliquely). The cutter 25 is formed by plate-shaped saw teeth, and is configured by mounting the cutter 25 to the main body 22a by a plate 22b. The main body of the cutter 25 is such that the distance from the center increases in order from the front side to the rear side.
It is attached to 22a.

Accordingly, when the cutter 25 is pulled in the pottery tube 1, the cutter 25 can cut deeper in order from the front side to the rear side without increasing the load per one cutting edge. It is possible to form the cutting groove 1a without difficulty on the inner surface of 1. In particular, since the chips generated when the ceramic tube 1 is cut are powdery, and the cutting depth per cutting edge can be made substantially constant, it is easy to remove the chips. It is possible to do.

The configuration of the cutter 25 is not particularly limited, and it is possible to use a band saw or a machine saw which is a standard product which is inexpensive as compared with a specially manufactured one.
However, it is a matter of course that the ceramic tube 1 may be manufactured by setting dimensions such as the shape of the cutting blade and the thickness of the cutter 25 that are optimal for cutting the ceramic tube 1.

The enlarged diameter portion 23 is the outer periphery of the tapered main body 23a, and a plurality of enlarged diameter rollers 23b to 23f are rotatably arranged at predetermined intervals in the axial direction between the cutters 25. Each of the diameter-expanding rollers 23b to 23f is constituted by four rollers arranged in directions perpendicular to each other in a circumferential direction in the same cross section, and a circle connecting the apexes of the rollers is formed by a taper of the main body 23a. Depending on the front side (cutting part 22 side)
From the rear side (the side of the connecting portion 24).

With the above configuration, the cutting groove 1a is already formed on the inner surface.
It is possible to tear open or break the ceramic tube 1 on which is formed. In particular, the expanding roller located at the rearmost end
23f has a diameter equal to the inner diameter of the target tunnel 7.

The four rollers constituting each of the diameter expanding rollers 23b to 23f are rotatably supported by a shaft attached to the main body 23a. Each of the rollers has a curved surface corresponding to the inner surface of the pottery tube 1 at the center in the thickness direction on the outer peripheral surface, and both ends are formed in a tapered shape. The four rollers are configured such that the tapered portions rotate in contact with each other and the curved portions can contact the inner surface of the pottery tube 1. It is possible for the forces acting on the rollers to cancel each other out.

A connecting portion 24 is formed on the main body 23a of the enlarged diameter portion 23. The connecting portion 24 is configured to be extendable and retractable, and is normally towed in a contracted state. When the load on the towing device 8 due to frictional resistance or the like becomes excessive, the connecting portion 24 is extended to pull the updating device A to tow. Performing the two-stage towing operation so as to reduce the size of the fume tube 11 and then perform the towing of the fume tube 11 in a wind-like manner without requiring a large traction force. Is possible.

For this reason, the connecting portion 24 is connected to the main body 23 of the enlarged diameter portion 23.
a inner cylinder 24a fixed to the rear end of a, an outer cylinder 24b to which the inner cylinder 24a is slidably fitted and to which the connecting rod 13 is attached, and a tip of the rod 26a connected to the inner cylinder 24a and attached to the outer cylinder 24b. And a hydraulic cylinder 26 provided. Therefore, by operating the hydraulic cylinder 26, the rod 26a
By extending and contracting the inner cylinder 24a and the outer cylinder 24b, the connecting portion 24 can be expanded and contracted.

In the connecting portion 24 configured as described above, FIG.
As shown in the above, when a plurality of fume pipes 11 are made to follow the renewal device A and are towed, the value of the frictional resistance generated between the renewal device A and the fume pipes 11 and the embankment 3 increases,
In the case where the traction capacity of the traction device 8 is exceeded, FIG.
As shown in FIG. 5, by operating the hydraulic cylinder 26 to extend the rod 26a simultaneously with the towing by the towing device 8,
With the fume tube 11 stopped inside the pipe line 2, it is possible to advance only the updating device A.

At this time, it is possible to exert the force of the hydraulic cylinder 26 by using the frictional resistance generated between the fume tube 11 and the embankment 3 as a reaction force. Therefore, the updating device A
Can be caused to act as the sum of the traction force of the traction device 8 and the thrust force of the hydraulic cylinder 26, and the updating device A can be traction with a large force.

When the rod 26a of the hydraulic cylinder 26 reaches the stroke limit, the hydraulic cylinder 26 is operated in a state where the traction by the traction device 8 is stopped to reduce the rod 26a, thereby reducing the force of the hydraulic cylinder 26. Connecting rod 13
Is transmitted to the press wheel 16 through the pressurizing device, and the rear end of the continuous fume tube 11 is pushed by the press wheel 16 so that the fume tube 11
Can be advanced. The reaction force at this time is transmitted from the updating device A to the towing device 8 via the towing rod 9, and further transmitted to and supported by the sheet pile 4 of the arrival shaft 6.

In the updating apparatus A, the straightening unit 21 and the cutting unit 2
2. The enlarged diameter portion 23 is connected to bendable with each other. For this reason, the respective parts 21 to 23 are connected via a flexible joint 27 such as a ball joint, and are configured to be able to follow the bending of the pipeline 2 independently of each other.

Therefore, when the pipeline 2 is bent due to earth pressure or ground subsidence acting on the pipeline 2 composed of a plurality of porcelain pipes 1, the portions 21 to 23 are connected to each other by the pipeline 2. It is possible to realize smooth traction by following the bent state of the vehicle.

When updating the pipeline 2 composed of the porcelain tube 1 to the fume tube 11 using the updating device A configured as described above,
The towing rod 9 previously inserted into the interior of the ceramic tube 1 is connected to the main body 21a of the straightening unit 21 of the updating device A, and the fume tube 11 is made to follow the connecting unit 24, via the connecting rod 13 and the pressing wheel 16. connect.

Next, when the traction device 8 is driven and the traction rod 9 is towed, the renewal device A is connected to the tubing 1 by the traction.
In the course of this movement, the rollers 21b to 21d provided in the correction unit 21 selectively contact the inner surface of the ceramic tube 1, and when the ceramic tube 1 is deformed, the rollers 21b to 21d The shape is corrected to a shape close to a cylinder according to the vertex of 21d. Also the cutting part 22
Then, the cutter 25 cuts the inner surface of the pottery tube 1 so as to gradually become deeper, and a cutting groove 1 a having a depth corresponding to the mounting state of the cutter 25 is formed on the inner surface of the pottery tube 1.

With the continued movement of the updating device A, the pottery tube 1 is pushed and spread by the expanding rollers 23b to 23f arranged in the expanding portion 23, and the force applied at this time causes the elongate starting from the cutting groove 1a. It breaks in a scale or breaks into small pieces. The piece 1b generated by the tearing or breaking is an enlarged diameter portion.
Each of them is press-fitted into the embankment 3 by a diameter-enlarging roller 23f arranged at the rear end of the embankment 23. As a result, a tunnel 12 into which the pieces 1b are pressed into the embankment 3 is formed. At the same time as the formation of the tunnel 12, the fume tube 11 connected to the connection portion 24 is pulled into the tunnel 12.

Then, when the towing rod 9 of the unit length is towed by the towing device 8, the towing rod 9 is removed from the coupler 9a. Further, a new fume tube 11 is placed on the propulsion base 7, and a pushing wheel 16 is brought into contact with a rear end of the fume tube 11, and the pushing wheel 16 is fixed to the connecting rod 13,
The traction device 8 is driven again to update the updating device A and the fume pipe.
Tow 11 By repeating the above operation, a new pipeline 2 including a plurality of fume pipes 11 is laid between the start pit 5 and the arrival pit 6, whereby the pipeline of the ceramic pipe 1 can be updated. is there.

In the above embodiment, the cutting portion 22, the enlarged diameter portion,
23 is configured by dividing the circumference into four equal parts. However, the number of divisions is not limited, and the number can be increased or decreased as appropriate according to conditions such as the diameter of the ceramic tube 1. When the circumference is divided, it is not always necessary to divide the circumference equally, but it is also possible to divide the circumference unequally.

In the above-described embodiment, the cutting portion 22 is configured by mounting the cutter 25 made of a saw blade. However, the cutting tool is not limited to the cutter 25, but has a preset thickness. The broach may be formed by forming a cutting blade in an oblique direction. In this case, the chips generated by the individual cutting blades move along the inclination of the cutting blades, and a good exclusion state can be realized.

[0065]

As described in detail above, in the method of renewing a ceramic tube according to the present invention, the buried ceramic tube is straightened to a shape close to a cylinder by straightening means, and then the inner surface of the ceramic tube is cut by cutting means. By forming a cutting groove and further expanding the pottery tube by means of diameter expansion, it breaks into long pieces or breaks into small pieces starting from the cutting groove, and at the same time as this breaking and breaking, The pipe can be constructed by pulling the pipe.
For this reason, the renewal work can be performed in one process regardless of the diameter of the existing pipe, and the construction period can be shortened. In particular, by dividing the circumference of the ceramic tube at a predetermined angle set in advance to form a plurality of pieces, the pieces can be easily pressed into the ground.

Further, in the ceramic pipe updating apparatus according to the present invention, even if the ceramic pipe to be updated is deformed, the deformation can be corrected by the correcting means so as to approach the cylinder, and A cutting groove can be formed on the inner surface of the corrected porcelain pipe by a cutting means. For this reason, the pottery tube can be torn or broken starting from the cutting groove by pushing and expanding the pottery tube by the diameter-enlarging roller arranged in the diameter-expanding means. Can be pressed into the ground. Therefore, it is possible to form a tunnel-like space surrounded by the pieces pressed into the ground,
Furthermore, a new pipe can be pulled simultaneously with the formation of the tunnel-like space.

The correcting means cuts both opposing side surfaces of the cylindrical member into a wedge shape having a reduced size from the front side to the rear side, and abuts the cut surfaces to be fixed by welding or the like. And, since it has rollers arranged on at least the upper and lower surfaces of the main body, even if the pottery tube is greatly deformed, it is smoothly pulled inside the pottery tube and brought into contact with the rollers, whereby The deformed ceramic tube can be made closer to a cylinder.

Further, since the connecting means connected to the rear of the diameter expanding means is configured to be extendable and contractible, when the renewal device and the fume tube are towed, the frictional resistance generated between the renewal device and the ground becomes large, and the traction force becomes excessive. In such a case, the work can be divided into towing only the updating device and towing the fume tube with the connecting portion as a boundary, and the work can be smoothly performed without increasing the towing force of the towing device. Updates can be made.

Further, since the straightening means, the cutting means, and the diameter expanding means are each connected to bendable, even if the pipeline to be renewed is bent due to land subsidence, etc. You can follow.

Further, when the ceramic tube is torn or broken,
A cutting groove is formed on the inner surface of the pottery tube without applying an impact force, and the pipe is cut or broken from the cutting groove as a starting point. Can be updated to a tube.

[Brief description of the drawings]

FIG. 1 is a view showing an execution procedure of an update method according to the present embodiment, in which a traction rod is inserted into a target pipeline, a traction device is installed on one side of the pipeline, and a propulsion stand is installed on the other side. FIG.

FIG. 2 is a diagram illustrating a state in which an update device is inserted into a pipeline to start towing.

FIG. 3 is a diagram illustrating a state in which a fume tube is connected to and pulled from an updating device.

FIG. 4 is a diagram illustrating a state where a pipeline is being updated by an updating device.

FIG. 5 is a diagram illustrating a state in which the updating device has reached the vicinity of the end of the pipeline.

FIG. 6 is a plan view illustrating a configuration of an updating device and a relationship between the updating device and a ceramic tube.

FIG. 7 is a side view of FIG. 6;

8 is a cross-sectional view taken along a line e in FIG. 7 and is a diagram illustrating a cross-sectional configuration of the updating device.

FIG. 9 is a diagram illustrating an example of a connecting means configured to be extendable and contractible.

[Explanation of symbols]

 A Renewal device 1 Porcelain pipe 1a Cutting groove 1b Piece 2 Pipe line 3 Embankment 3a Slope 4 Sheet pile 5 Start pit 6 Arrival pit 7 Propulsion stand 8 Traction device 8a Hydraulic cylinder 8b Platen 8c Transmission member 8d Outrigger 8e Reaction force pulling member 9 Rod 9a Coupler 11 Fume tube 12 Tunnel 13 Connecting rod 13a Coupler 14 Injection tube 15 Hose 16 Press ring 21 Straightening part 21a Body 21b to 21d Roller 22 Cutting part 22a Body 22b Plate 23 Large diameter part 23a Body 23b to 23f Large diameter roller 24 Connection part 24a Inner cylinder 24b Outer cylinder 25 Cutter 26 Hydraulic cylinder 26a Rod 27 Joint

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Miyashita 2-4-2, Shibata, Kita-ku, Osaka-shi, Osaka Inside West Japan Railway Company (72) Inventor Sadao Furuji 2-chome, Shibata, Kita-ku, Osaka, Osaka No. 24, West West Japan Railway Company (72) Inventor Hiroki Ishikawa 4-44, Miyahara, Yodogawa-ku, Osaka-shi, Osaka Inside Dai-tei Kogyo Co., Ltd. (72) Shingo Imaizumi, Yodogawa-ku, Osaka, Osaka 4-44, Miyahara Daitai Kogyo Co., Ltd. (72) Inventor Hiroshi Tanaka 2-2-2 Dojima, Kita-ku, Osaka-shi, Osaka Kintetsu Dojima Building Osaka University Industrial Hall Disaster Science Research Institute Foundation (72) Invention The author Kyutaro Ishii 2-2-2 Dojima, Kita-ku, Osaka City, Osaka Kintetsu Dojima Building Inside the Disaster Science Institute, Osaka University Industrial Hall (72) Inventor Toshiyuki Kito Kintetsu Dojima Building, 2-2-2 Dojima, Kita-ku, Osaka-shi Osaka University Industrial Hall Building Disaster Science Research Institute (72) Inventor Akira Shimoma 2-2-2, Dojima, Kita-ku, Osaka-shi, Osaka Kintetsu Dojima Building Osaka 2D054 AA06 AC18 AD22 AD37 BA18 FA12

Claims (8)

[Claims] 1. A pipe renewal method for renewing a pottery pipe buried underground to a new pipe, wherein a towing rod is inserted from one opening side into a pipe made of a plurality of pottery pipes, and the other is inserted into the pipe. In the process of pulling the renewal device by attaching the renewal device to this tow rod and pulling the renewal device through the opening, the pottery tube deformed by the external force is spread out and approximated to a cylindrical shape, and approximately on the inner surface of the ceramic tube approaching the cylindrical shape Form a straight cutting groove, break or break by further expanding the pottery tube with the cutting groove formed on the inner surface, further connect a new pipe to the renewal device and connect the new pipe A porcelain pipe renewal method characterized by being laid in a space of a ruptured or broken and expanded ceramic pipe. 2. Pulling the renewal device and the new pipe while injecting a backing material or a sliding material between the renewal device, the new pipe and the ground from a connection between the renewal device and the new pipe. The method for renewing a ceramic tube according to claim 1, wherein 3. The connecting portion between the updating device and the new pipe is configured to be extendable and contractable, and when the traction resistance increases when the updating device and the new pipe are towed, the connecting portion is extended to only the updating device. 3. The method for renewing a ceramic tube according to claim 1, wherein the connecting portion is contracted and a new pipe is advanced after the connecting portion reaches the extension limit. 4. The method according to claim 1, wherein the new pipe is a fume pipe used in a propulsion method. 5. A pottery pipe which is pulled into the pottery pipe to be renewed and cuts or breaks the pottery pipe, press-fits the fragments into the ground to form a space, and lays a new pipe in the space. An updating device, wherein a straightening means disposed on the front side in the traction direction, a cutting means continuous behind the straightening means, a diameter increasing means continuous on the rear side of the cutting means, and a continuous diameter behind the diameter expanding means. The straightening means is formed so that at least the dimension in the vertical direction increases from the front side to the rear side, and the cutting means is located at a position where the outer periphery of the main body is divided into a predetermined number and the front side in the axial direction. A cutter body provided with a plurality of cutting blades is arranged so that the distance from the center to the tip increases in order from the rear toward the rear side, and the diameter increasing means extends the outer circumference of the tapered body at a predetermined angle. The cutting position at the cutting position And a connecting plate for contacting a rear end of a new pipe with the contact plate. And a connecting rod for transmitting a force to the ceramic tube. 6. A main body formed by cutting the opposite side surfaces of the cylindrical member in a wedge shape having a reduced size from the front side to the rear side and fixing the cut surfaces in contact with each other; The ceramic tube updating device according to claim 5, further comprising a roller disposed on at least upper and lower surfaces of the main body. 7. The apparatus according to claim 5, wherein the connecting means includes an extendable member configured to be extendable and contractable, and a driving member configured to extend and retract the extendable member. The described updating device of the pottery tube. 8. An apparatus according to claim 5, wherein said straightening means, cutting means, and diameter expanding means are connected to each other so as to be able to bend.