JP2010053518A - Aqueduct-jacking leading body and construction method for burying underdrainage pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aqueduct jacking leading body which enables an aqueduct to be inserted also while being jacked and buried, when burying the aqueduct, and which enables drive transmission when jacking by a simple structure, and to provide a construction method for burying an underdrainage pipe with the leading body. <P>SOLUTION: The aqueduct-jacking leading body 1 includes a body portion 11 of the leading body, and a notched portion 12, and the notched portion has two edges while one edge serves as a drive transmission portion 121 and the other edge serves as a drive release guide portion 122. In the construction method for burying the underdrainage pipe, outer pipes 3 and 4 are attached to a drive portion of a jacking and burying device 5; the aqueduct-jacking leading body is connected to a leading end of the aqueduct 2 in which a large number of weep holes 21 are drilled; the aqueduct is inserted into the outer pipe; the notched portion of the leading body is engaged with a protrusion 31 of a leading end of the outer pipe; the outer pipe and the aqueduct are jacked into the ground by jacking the outer pipe while rotating it; and the outer pipe is pulled out backward after the completion of jacking for a predetermined length, so that only the aqueduct jacking leading body and the aqueduct can be buried in the ground. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a leading conductor used to embed a water conduit in the ground and lead the water conduit in the ground.

  In recent years, rivers have been constructed with impermeable walls such as steel sheet piles and PC sheet piles as a result of refurbishment due to urbanization, and there are places where inflow (exudation) of groundwater into the river is blocked, There were situations where groundwater could not be introduced into the river. For this reason, it is necessary to consider a construction method for installing underground culvert drain pipes at the revetment and introducing groundwater behind the revetment into the river.

  Therefore, it is conceivable to divert the technology of underdrain drainage to prevent landslides at the foot of a mountain or slopes of mountains, etc., and this type of conventional drilling has innumerable water-absorbing holes in the side wall and the outer peripheral surface is a permeable sheet There has been a pipe culvert constructed so that the outer shell pipe for propulsion can be freely pulled out with respect to the perforated pipe for culverts that is surrounded by a layer using a material (Patent Document 1). In this technology, a perforated pipe with a water absorption hole formed in a peripheral wall portion is propelled and buried alone at a required portion such as a mountain skirt or a mountain slope. When it was to be embeded in the ground alone, it was invented to solve the problem that the water absorption holes were easily clogged with earth and sand and the water absorption effect could not be expected in the long term.

  As another technique, a pipe body having a large number of drain holes and having a conical end closed, and a predetermined arrangement pitch extending from the tip of the pipe body to the outer periphery. There was a water collecting pipe consisting of a sponge resistor with the required diameter and width. In this technology, a member called an inner rod is inserted into a casing pipe, and after boring to a certain position in the ground, the inner rod is removed, and a water collecting pipe whose tip is closed conically is inserted into the casing. The casing pipe is pulled out after the insertion is completed (Patent Document 2).

  In addition, a large number of drain holes are provided around the periphery, a short fixing pipe that is open at the tip and laterally beyond the predetermined depth of the natural ground, and a long pipe body of the required length on the outer periphery of the long pipe body. There has been a technology of a water collection structure consisting of a water collection pipe that is formed by surrounding a drain hole and driving an anchor body protruding from the closed tip into the earth and sand filled in this fixing pipe (Patent Document) 3).

As another technique, a rotating casing is arranged on the outer periphery of the rotating hollow rod, a cutting bit is provided at the tip of the hollow rod via a rod cutting device, and the tip of the rotating casing is cut by the sliding of the rotating hollow rod. It can be opened and closed with a bit, propelled in the ground with its tip closed or open, and after propulsion is completed, the hollow rod is separated from the cutting bit by the separating device and removed from the casing. There is a technique of a method of inserting a drainage drain pipe into the ground, then pulling and detaching the casing out of the ground and burying the drain pipe in the ground (Patent Document 4).
Japanese Patent Laid-Open No. 7-82751 (2 pages, FIGS. 2 and 3) Japanese Patent Laid-Open No. 10-37174 (2 pages, FIG. 2) Japanese Patent Laid-Open No. 10-37175 (2 pages, FIG. 1) Japanese Patent Laid-Open No. 11-256557 (page 2, FIG. 1)

  However, in Patent Document 1, a conical propulsion cover is attached to the tip of the propulsion outer pipe. The propulsion cover is configured so that the tip of the propulsion outer pipe can enter. Therefore, in the propulsion embedding method that requires detachable mounting, there is a problem that the driving force from the propulsion embedding device is not easily transmitted directly to the propulsion cover body.

  Moreover, in patent document 2 and patent document 3, in order to embed a water collecting pipe in a predetermined position in the ground, a step of boring while inserting a casing pipe into which an inner rod is inserted, a step of extracting the inner rod, a casing It was a three-step process of inserting the water collection pipe into the pipe, and it was impossible to embed the water collection pipe at the same time as propulsion embedding.

  Furthermore, in Patent Document 4, a casing is arranged on the outer periphery of a hollow rod to which a cutting bit is connected, and the hollow rod is propelled while rotating, and after the propulsion is finished, the hollow rod is pulled out, and a drainage drain pipe is installed. Since it was inserted, the drainage drain pipe could not be buried at the same time as the propulsion embedding as described above. Moreover, the number of parts left in the ground after propulsion embedding was also large.

  The present invention has been made in view of the above-described points, and the object of the present invention is to enable the insertion of a water guide pipe at the same time as the propulsion embedding in a water pipe embedding process, and a simple structure. It is to provide a conduit guide propulsion conductor that enables drive transmission in the propulsion process, and to provide a method for burying a culvert drainage pipe using the conduit guide propellant.

  Therefore, the present invention related to the water conduit propulsion leading conductor is a water conduit propulsion leading conductor used to embed the water conduit in the ground, and a leading conductor main body connected to the tip of the water conduit, A cutout portion formed by cutting out the rear edge of the leading conductor main body, and the cutout portion has at least two edges, one edge serving as a drive transmission portion, and the other edge driven and released. A gist of a water guide tube propelling conductor characterized by being a notch portion serving as a guide portion. According to the said structure, the driving force from a propulsion embedding apparatus can be transmitted or released to the notch edge of a front conductor.

  The present invention also provides a water pipe propulsion tip conductor that is provided at the tip of the water pipe to embed the water pipe in the ground and that is propelled by transmission of propulsion drive and rotation drive. A bottomed cylindrical tip conductor main body connected to the water conduit while allowing the tip of the water pipe to be inserted, and a rear edge of the tip conductor main body are divided into a plurality of sections and the edges of the sections are cut off respectively. A plurality of cutout portions, each of which has two end edges, each of which is a cutout portion that is cut into a substantially V-shape. The predetermined side edge of the unit is a drive transmission unit that receives transmission of propulsion drive and rotation drive, and the remaining end edge is a propulsion drive transmission unit that receives transmission of propulsion drive. Drive solution that releases the rotational drive transmitted to the drive transmission unit Also summarized as conduit propulsion leading body, characterized in that a guide portion. According to the said structure, the one edge in a substantially V-shaped notch part can be made into a drive transmission part, and can receive transmission of the propulsion drive and rotation drive from a propulsion embedding apparatus. In addition, by using the other end edge as the propulsion drive transmission unit, it is possible to receive the propulsion drive transmission from the propulsion embedding device. In this case, when the rotation drive for propulsion embedding is reverse rotation, the propulsion drive transmission unit can be a drive release guide unit that releases the rotation drive.

  In this case, in the above invention, the rear end edge of the leading conductor main body portion may be divided into four and may be four cutout portions configured by cutting out the end edges of the respective sections.

  Furthermore, the present invention provides a water pipe propulsion tip conductor provided at the tip of the water pipe to embed the water pipe in the ground and propelled by transmission of propulsion drive and rotational drive. A bottomed cylindrical tip conductor main body connected to the water conduit while allowing the tip of the water pipe to be inserted, and a rear edge of the tip conductor main body are divided into a plurality of sections and the edges of the sections are cut off respectively. A plurality of cutout portions, each of which has two end edges, each of which is a cutout portion that is cut into a substantially V-shape. The predetermined side edge of the part is a rotational drive transmission part that receives transmission of rotational drive, and the remaining edge is a propulsion drive transmission part that receives transmission of propulsion drive. Drive release guide part for releasing the rotational drive transmitted to the part Also summarized as conduit propulsion leading body, characterized in that. According to the said structure, the one end edge in a substantially V-shaped notch can be made into the rotation drive transmission part, and can receive the transmission of the rotation drive from a propulsion embedding apparatus. In addition, by using the other end edge as the propulsion drive transmission unit, it is possible to receive the propulsion drive transmission from the propulsion embedding device. In this case, when the rotation drive for propulsion embedding is reverse rotation, the propulsion drive transmission unit can be a drive release guide unit that releases the rotation drive.

  In this case, in the above invention, the rear end edge of the leading conductor main body portion may be divided into four and may be four cutout portions configured by cutting out the end edges of the respective sections.

  In each of the above inventions, the drive transmission unit or the rotational drive transmission unit may have an edge in a direction parallel to the axis of the leading conductor. According to the said structure, the rotational drive force from a propulsion embedding apparatus can be directly transmitted to a drive transmission part or a rotational drive transmission part. The drive release guide portion may be a drive release guide portion having an edge in an acute angle direction with respect to the drive transmission portion or the rotational drive transmission portion.

  On the other hand, the present invention related to the underdrain drainage pipe embedding method is an underdrain drainage pipe embedding method using the above-described conduit guide propulsion conductor, and can be arranged while surrounding the conduit pipe, and the conduit pipe at the tip thereof Mount the outer tube with a protrusion that can be engaged with the notch of the propulsion destination conductor to the drive part of the propulsion embedding device that generates rotational drive force and propulsion drive force, and drill a number of drain holes. A conduit guide tip conductor is connected to the tip of the guide pipe, and the guide pipe is inserted into the outer pipe, and the notch of the guide pipe guide conductor is engaged with the protrusion at the tip of the guide pipe. The outer pipe is propelled while rotating, the outer pipe and the water guide pipe are propelled into the ground, and after the completion of the predetermined length of propulsion, the outer pipe is pulled out rearward so that only the water guide pipe propelling conductor and the water guide pipe are removed. Requires underground drainage pipe burying method, characterized by being buried in the ground To. According to the above configuration, the entire side surface of the water conduit is not buried with soil even when the underground is propelled and buried by surrounding the water conduit with the drain hole formed by the outer tube. Therefore, clogging of the drilled water hole can be prevented.

  Furthermore, the present invention is an underdrain drainage pipe embedding method using the above-mentioned water conduit propulsion leading conductor, which can be disposed while surrounding the water conduit, and is provided at a notch portion of the water conduit propulsion leading conductor at the tip. An outer tube having an engaging protrusion is attached to a drive unit of a propulsion embedding device that generates rotational drive force and propulsion drive force, and is guided to the tip of a water guide tube formed with a number of drain holes. The water pipe propulsion leading conductor is screwed or fixed, a filter material made of synthetic resin is sealed in almost the entire area of the water conduit, the water conduit is inserted into the outer pipe, and the water pipe propulsion leading conductor is notched. The outer tube is engaged with the protrusion at the tip of the outer tube, and the outer tube is propelled while being rotated to propel the outer tube and the water guide tube into the ground. As a result, only the above-mentioned water pipe propulsion conductor and water pipe are buried in the ground. And, the gist of the underdrain pipe buried method characterized by comprising wearing the lid to the rear end opening of the conduit. According to the said structure, by installing an opening-and-closing lid in the rear-end opening part of a water conduit, underground groundwater can be drained to a river, and the river water is prevented from flowing back into a water conduit at the same time. Can do.

  In each of the above-mentioned inventions, the connection between the water guide tube propulsion conductor and the tip of the water guide tube can be screwed or fixed.

  According to the present invention relating to the water pipe propulsion leading conductor, the outer pipe is engaged with the water pipe propulsion leading conductor, and the water guiding pipe connected to the leading conductor is inserted into the outer pipe, so that in the ground It becomes possible to promote the outer pipe and the water guide pipe at the same time. Then, by pulling out the outer pipe, the water guide pipe can be buried in the ground. Further, the driving force can be sufficiently transmitted with a simple structure. Since the structure is simple, the number of parts can be reduced and the cost can be reduced.

  According to the present invention relating to the underdrain drainage pipe embedding method, the underdrain drainage pipe can be embedded even in the hard ground around the river. That is, unlike the press-fitting type propulsion method in soft ground such as a mountain foot, it can be realized by adding a rotational drive.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st embodiment is related with the tip conductor used in order to embed a water conduit in the ground.

  As shown in FIG. 1, the leading conductor 1 of this embodiment is attached to the propulsion embedding device 5 together with the outer tube 3 and is rotationally press-fitted into the ground. The driving force by the propulsion embedding device 5 is transmitted to the leading conductor 1 through the outer tube 3, and by propelling the leading conductor 1, the leading conductor 1 and the water conduit 2 are finally buried in the ground.

  The leading conductor 1 is composed of a main body 11 and a notch 12, and as shown in FIG. 2A, the tip shape is a truncated cone and the side shape is a bottomed cylindrical shape. (This is the body part). In this way, the tip shape is formed in the shape of a truncated cone, which is employed for reducing and promoting earth pressure resistance in the traveling direction in the ground. The rear end edge of the leading conductor main body 11 is divided into four, and the end edge of each section is formed with a cutout portion 12 formed by cutting out into a substantially V shape. The notch 12 is provided with a rotational drive transmission part 121 and a propulsion drive transmission part 122, and the rotational drive transmission part 121 is formed from the base 123 toward the rear edge, and is formed with respect to the axis of the leading conductor 1. And have edges in parallel directions. On the other hand, the propulsion drive transmission unit 122 is formed from the base 123 toward the rear edge, and is provided so as to have an edge in an acute angle direction with respect to the rotation drive transmission unit 121. The notches 12 of each section are configured in a congruent manner so that the rotational driving force and the propulsion driving force from the propulsion embedding device 5 are evenly transmitted to the leading conductor 1. That is, each section is configured with the same size and the same shape.

  Here, the leading conductor main body 11 will be described in detail. As shown in FIG. 2B, the leading conductor main body 11 is composed of a tip member 111, a drive transmission member 112, and a cylindrical coupling member 113. A part of the tip member 111 is housed inside the top of 113, and further, the cylindrical connecting member 113 is housed in the hollow inside of the drive transmission member 112 and welded integrally. At this time, the step portion generated at the tip of each member is welded to form the tip of the leading conductor in a truncated cone shape together with the solvent portion B (see FIG. 2C).

  A female thread is threaded on the rear inner surface of the leading conductor 1, and the leading conductor 1 and the conduit 2 can be connected by being screwed with a male thread threaded at the tip of the conduit 2. .

  This water conduit 2 is for draining groundwater flowing into the pipe from the ground into the river, and as shown in FIG. 3 (a), a leading conductor 1 is screwed to the tip, Is formed in a cylindrical shape, and a drain hole 21 for allowing groundwater to flow in is formed in the entire side surface. A female screw is threaded on the inner surface of the rear end of the water guide tube 2, and the water guide tubes 2 can be connected to each other by being screwed with a male screw threaded on the tip side surface of the other water guide tube 2. . Thereby, since the water guide pipes 2 can be connected continuously, the water guide pipe 2 can be extended to a predetermined position in the ground.

  The outer tube 3 is disposed so as to surround the water guide tube 2 and includes a protrusion 31 that can be engaged with the notch 12 of the leading conductor 1 as shown in FIG. The outer tube 3 is positioned at the head in the propulsion direction and is used by being engaged with the leading conductor 1. A mountain-shaped protrusion 31 is provided at the tip of the outer tube 3, and a rotation contact portion 311 and a propulsion contact portion 312 are formed at the end edge of the protrusion 31. At this time, the rotational conductor transmission portion 121 and the rotational contact portion 311 and the propulsion drive transmission portion 122 and the thrust contact portion 312 are engaged with each other, thereby temporarily fixing the leading conductor 1 and the outer tube 3. (See FIG. 4A). A female screw is threaded on the inner surface of the rear end of the outer tube 3 (see FIG. 3B), and is screwed with a male screw threaded on the side surface of the outer tube 4 (see FIG. 3C). Since the outer tube 3 and the outer tube 4 can be connected to each other, the outer tube can be added to a predetermined position in the ground.

  Since the present embodiment is configured as described above, the rotational driving force obtained from the propulsion embedding device 5 by mounting the outer tube 3 capable of temporarily fixing the leading conductor 1 on the propulsion embedding device 5. And propulsion drive force can be transmitted to the front conductor 1 (refer Fig.4 (a)). Then, these driving forces are transmitted to the leading conductor 1 through the outer tube 3 so that it can be rotationally pressed into the ground.

  Next, the first embodiment according to the underdrain drainage pipe embedding method will be described at the same time while explaining the usage mode of the present embodiment. As described above, by attaching the outer tube 3 to the propulsion embedding device 5, the outer tube 3, the leading conductor 1 connected to the outer tube 3, and the water guiding pipe 2 following the leading conductor 1 can be rotationally press-fitted as a whole. . Here, each said member is adjusted to fixed length (refer FIG. 3), and this length dimension is united with the propulsion stroke by the propulsion embedding apparatus 5. FIG. Specifically, in a state where the notch 12 of the leading conductor 1 and the protrusion 31 of the outer tube 3 are engaged, the distance from the tip of the leading conductor 1 to the rear ends of the water guide tube 2 and the outer tube 3 is propulsion. It is made to correspond to the stroke of the burying device 5.

  Then, when a certain distance (corresponding to the stroke of the propulsion embedding device) is propelled and buried in the ground, a new water conduit 2 and a new outer pipe 4 are connected while being connected, and rotationally press-fitted into the ground. It will be promoted and buried. Thereby, a propulsion process and an embedding process can be advanced simultaneously in the ground.

  After propelling and embedding a desired distance, the process of towing and extracting the outer tube 3 (outer tube 4) from the ground is continued using the propulsion embedding device 5 (see FIG. 4B). In this case, the outer tube 4 to which the outer tube 3 is connected is rotated in the opposite direction to the rotation at the time of propulsion embedding, and then pulled in the horizontal direction to release the temporary fixing of the leading conductor 1 and the outer tube 3. It can be made. That is, after the outer tube 4 to which the outer tube 3 is connected is rotated in the reverse direction and then pulled in the horizontal direction, the engaging portion of the rotation drive transmission portion 121 and the rotation contact portion 311 moves in a direction away from each other. It will be done. In this case, the propulsion drive transmission part 122 is converted into a part for releasing the rotational drive force, that is, a drive release guide part. On the other hand, the propulsion contact portion 312 is converted into a drive release contact portion.

  In this way, the driving force transmitted from the drive release contact portion 312 can be transmitted to the drive release guide portion 122 by driving the outer tube 4 to which the outer tube 3 is connected in the reverse rotation. Since the reverse rotation driving force can reduce the earth pressure resistance when the leading conductor 1 and the outer tube 3 are separated from each other, the outer tube 3 (outer tube 4) can be easily removed from the ground. It becomes. As described above, the reverse rotation of the outer tube 4 may receive a driving force transmitted from the propulsion embedding device 5, but the outer tube 4 can be rotated in a rotatable state without receiving the driving force. It is also possible to rotate the tube 4 naturally.

  After the outer pipe 3 (outer pipe 4) is removed from the ground, only the water guide pipe 2 to which the leading conductor 1 is screwed is buried in the ground (see FIG. 4C). The outer diameter of the leading conductor body 11 is wider than the outer diameter of the water conduit 2, and the end surface of the leading conductor 1 constituted by the difference in the outer diameters of both members is relative to the axis of the conduit 2. Will be positioned vertically. Therefore, it has a structure that plays the role of a resistor (anchor) in the ground and cannot be easily pulled out.

  Thus, the underdrain drainage pipe which leaves the leading conductor 1 and the water conduit 2 in the ground can be used to drain the groundwater stored on the back of the revetment into the river. That is, the culvert drainage pipe is provided by installing the leading conductor 1 and the water conduit 2 from the river side toward the revetment back surface. Therefore, this propulsion embedding device 5 adopts a method in which a scaffold is temporarily set between the two revetments and installed on the scaffold in advance.

  The outer pipe 3 on which the leading conductor 1 is temporarily fixed is attached to the propulsion embedding device 5 and is propulsion-buried by rotational press-fitting in the horizontal direction starting from the slope part of the revetment, and then the outer pipe 3 (outer pipe 4) is pulled out from the ground, and the water guide pipe 2 to which the leading conductor 1 is screwed is left in the ground, so that the ground water in the ground flows from the drain hole 21 of the water guide pipe 2. And drain into the river. In addition, in order to prevent the reverse flow of the river water etc. at the river side opening end of the water conduit 2, the below-mentioned opening / closing lid 7 may be installed. Further, the propulsion embedding device 5 is a small device, but can be used in that a desired stroke can be obtained by a single cylinder operation.

  The propulsion embedding device 5 includes a slide unit 51 and a propulsion unit 52, and a support unit 53 on which a rotary shaft and the outer tube 3 (outer tube 4) can be mounted is provided on the front surface of the propulsion unit 52. The first hydraulic cylinders 54 and 55 are attached to the slide portion 51, and the second hydraulic cylinders 56 and 57 are attached to the propulsion portion 52. The slide portion 51 has a structure capable of moving forward and backward in a predetermined direction on the base 59.

  Then, the operation | movement aspect of the propulsion embedding apparatus 5 is demonstrated. FIG. 5 is a diagram showing an outline of the advancement and retreat of the slide part 51 and the propulsion part 52. Then, as shown in FIG. 5A, the slide part 51 and the propulsion part 52 are moved to the rear (right side in the figure) of the apparatus, and the outer tube 3 is attached to the support part 53 provided on the entire surface of the propulsion part 52. Is installed (see FIG. 6). At this time, the first hydraulic cylinders 54 and 55 and the second hydraulic cylinders 56 and 57 are both contracted (see FIG. 5A).

  When the first hydraulic cylinders 54 and 55 are extended while attaching the outer pipe 3 (outer pipe 4) selected according to the process and operating the hydraulic motor 58 if necessary, the slide portion 51 Will advance along the base rails 591 and 592 of the base 59. By this advancement of the slide part 51, the propulsion part 52 is also advanced together with the slide part 51, and is propelled into the ground from the tip of the attached leading conductor 1 or the like (see FIG. 5B). When the first hydraulic cylinders 54 and 55 are extended to the longest state, the forward movement by the hydraulic cylinders 54 and 55 is stopped.

  Subsequently, by extending the second hydraulic cylinders 56 and 57, only the propulsion unit 52 moves forward with reference to the slide unit 51 (see FIG. 5C). By moving the second hydraulic cylinders 56 and 57 to the longest state, the movement of the propulsion unit 52 by the second hydraulic cylinders 56 and 57 is stopped, and the propulsion process is ended. At this time, the total distance that the propulsion unit 52 moves is made to coincide with a desired stroke. That is, the first hydraulic cylinders 54 and 55 move the slide portion 51 by a distance corresponding to about two-thirds of the entire stroke, thereby causing the propulsion portion 52 to propel the base 59 relatively by the same distance. . Further, only the propulsion unit 52 is moved by the second hydraulic cylinders 56 and 57 over the distance corresponding to the remaining one third.

  Next, the outer tube 3 (outer tube 4) and the like are disconnected from the support portion 53 of the propulsion unit 52, and the propulsion unit 52 is moved backward. At this time, the second hydraulic cylinders 56, 57 are contracted to retract the propulsion unit 52 to the slide unit 51, and the first hydraulic cylinders 54, 55 are contracted to form the propulsion unit 52 together with the slide unit 51. 59 is moved back to the vicinity of the rear end.

  Thereafter, the water guide pipe 2 and the outer pipe 4 to be propelled next are supported, and the above propulsion and retreat are repeated, and the propulsion is sequentially propelled to a predetermined position. The extension pipe following the water guide pipe 2 screwed to the leading conductor 1 has the same shape as that of the leading water pipe 2, and a long section from the transmission opening to the predetermined position reached is made continuous by a single thin pipe. . After the leading conductor 1 and the conduit pipe 2 reach a predetermined position, only the outer pipe 3 (outer pipe 4) is pulled out and collected, and the piping is completed by the leading conductor 1 and the conduit pipe 2 remaining in the ground. It is. The pulling work of the outer tube 3 is also performed using the propulsion embedding device 5 of the present embodiment. The method of use is performed in the reverse process of the above propulsion.

  As described above, the propulsion embedding device 5 used in the present embodiment employs a method in which the first hydraulic cylinders 54 and 55 and the second hydraulic cylinders 56 and 57 are advanced and retracted in two stages. The reason for moving forward and backward by such a method is to enable a desired stroke by a single cylinder operation. That is, in a state where both the first hydraulic cylinders 54 and 55 and the second hydraulic cylinders 56 and 57 are contracted, the propulsion unit 52 can be disposed in the vicinity of the rear portion of the base 59, and the first This is because, after being moved by the hydraulic cylinders 54 and 55 (or simultaneously), the propulsion unit 52 can be moved to the tip of the slide portion 51, that is, to the vicinity of the tip of the base 59. For example, when the entire stroke is moved only by a single hydraulic cylinder 54, 55, the propulsion unit 52 can be moved only within a range in which the hydraulic cylinder 54, 55 can be extended. The moving range of the propulsion unit 52 is determined only by the positional relationship between the hydraulic cylinders 54 and 55 and the propulsion unit 52, and the range from the vicinity of the rear end of the base 59 to the vicinity of the tip cannot be moved. In other words, if the strokes of the single hydraulic cylinders 54 and 55 are set to a desired length, it is necessary to provide the base 59 with a larger size, and accordingly, a larger installation location is required. It is.

  Next, a second embodiment according to the underdrain drainage pipe embedding method will be described. In the present embodiment, the filter 6 is inserted into the water conduit 2. That is, drainage holes 21 are formed in a zigzag manner on the entire side surface of the water conduit 2 left in the ground, and groundwater can be introduced from the drainage holes 21. At this time, since underground soil also flows into the drain hole 21 simultaneously with the inflow of groundwater, it is considered that there is a high possibility that the inside of the water conduit 2 will be clogged by these soils. Therefore, as shown in FIG. 4D, the outer surface of the filter 6 and the inner surface of the water conduit 2 are inserted by inserting a substantially cylindrical filter 6 formed of synthetic resin fibers or the like into the water conduit 2. Therefore, the inflow of earth and sand from the drain hole 21 can be prevented. In the present embodiment, the cylindrical filter 6 is inserted in advance inside the water conduit 2. Therefore, when the water conduit 2 is buried in the ground as in the first embodiment described above, the cylindrical filter 6 is enclosed in the entire region of the water conduit 2.

  The filter 6 has a cylindrical three-dimensional net shape and is hollow in the central axis direction, so that water can pass therethrough. Moreover, it is also possible to make it the structure which winds the thin water-permeable sheet | seat of the mesh finer than the mesh | network of the filter 6 around the outer peripheral surface of the filter 6, and in this case, further preventing the inflow of earth and sand into the inside of the water conduit 2 You can also.

  Next, the opening / closing lid 7 will be described. The open / close lid 7 is for draining water that has flowed into the water guide pipe 2. Groundwater stored in the ground flows into the pipe through the drain hole 21 of the water conduit 2 and is drained into the river. At this time, when the position where the water guide pipe 2 is disposed is low, it is considered that the water of the river flows backward into the water conduit 2. Therefore, the position where the water conduit 2 is disposed is the normal water level of the river. It is made higher than. However, it is also assumed that river water flows back into the conduit 2 due to an abnormal rise in the river water level. Therefore, it is necessary to attach the opening / closing lid 7 having a structure that prevents the river water from flowing back to the opening of the water conduit 2.

  As shown in FIG. 7, the open / close lid 7 includes a lid member 71, a support shaft 72, a reinforcing plate 73, bearings 74 and 75, and a connecting member 78, and the bearing 75 is fixed to the lid member 71. A bearing 74 is fixed to the reinforcing plate 73. The open / close lid 7 has a bearing 74 and a bearing 75 arranged on the same axis, and a support shaft 72 is inserted through the bearings 74 and 75 so as to be located on the same axis, thereby supporting the opening / closing lid 7 on the reinforcing plate 73. It is done. The reinforcing plate 73 is provided with a through hole 76 and is fixed to a sheet pile 77 standing on the revetment. At this time, the connecting member 78 is used to connect the reinforcing plate 73 on which the open / close lid 7 is pivotally supported and the water conduit 2. The connecting member 78 has a cylindrical side surface, and a flange-like protruding piece 79 is formed on one side of the peripheral edge so as to be positioned in a direction perpendicular to the axial center of the cylinder. The flat portion of the bowl-shaped protrusion 79 is fixed to the reinforcing plate 73, and the water guide pipe 2 is inserted into the inner surface of the connecting member 78, so that the through hole 76 of the reinforcing plate 73 and the inside of the water guide pipe 2 are connected. It can be communicated.

  The open / close lid 7 has a structure that can drain the water from the water conduit 2 into the river and at the same time prevent the river water from flowing back into the water conduit 2. Specifically, when there is no water inside the conduit 2, the lid member 71 urges the end surface of the reinforcing plate 73 to close the through hole 76 communicating with the conduit 2, When a certain amount of water is stored inside the water conduit 2 and the internal water pressure exceeds the urging force to the through hole 76, the lid member 71 is opened and the stored water is drained into the river.

  The biasing force of the opening / closing lid 7 can be obtained by decentering the center of gravity of the lid member 71. That is, by decentering the center of gravity of the lid member 71, the opening / closing lid 7 pivotally supported by the support shaft 72 can be rotated in the direction of the end surface of the reinforcing plate 73, so that the end surface of the reinforcing plate 73 is fixed. It is possible to energize with pressure. With such a structure, even if a water pressure is applied to the outside of the opening / closing lid 7 due to a rise in the water level of the river, the opening / closing lid 7 is not opened by the water pressure and the urging force. On the other hand, even when the river water level is low, the lid member 71 urges the end face of the reinforcing plate 73 with a constant pressure, so that the river water does not flow back into the water conduit 2. . As mentioned above, since the water inside the water conduit 2 flows only in one direction, it can be drained into the river without causing the underground groundwater to flow backward.

  Although the present embodiment is as described above, various aspects can be taken without departing from the spirit of the present invention. For example, in the present embodiment, the rear end edge of the leading conductor main body 11 has been described with respect to the notch 12 divided into four parts, but a structure in which a plurality of notches 12 are formed may be employed. Also in this case, each of the plurality of cutout portions can receive the transmission of the driving force from the propulsion embedding device evenly. The shape of the notch 12 is not only substantially V-shaped but can be transmitted with driving force from the propulsion embedding device 5 as long as it is a shape that can be engaged, such as an uneven shape or a wave shape. .

  Moreover, about the connection of the leading conductor 1 and the water conduit 2, although this embodiment has demonstrated the case where it is screwed, it is not limited to this, Even if it is a case where it adheres, fits or welds, Both members can be connected.

It is a general view which shows embodiment of the leading conductor which is this invention. (A) is a perspective view which shows the tip conductor which is this invention, (b) is a components figure which comprises a tip conductor, (c) is an assembly | attachment figure of components. (A) is a side view which shows embodiment of this invention, (b) and (c) are side views which show an outer tube | pipe. It is explanatory drawing which shows the usage condition of the tip conductor which is this invention. It is explanatory drawing which shows the operation | movement aspect of a propulsion embedding apparatus. It is explanatory drawing which shows a propulsion embedding apparatus. It is explanatory drawing which shows embodiment of the underdrain drainage pipe construction method which is this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lead conductor 2 Water guide pipes 3, 4 Outer pipe 5 Propulsion embedding device 6 Filter 7 Opening / closing lid 11 Lead conductor main body part 12 Notch part 21 Drain hole 31 Projection part 51 Slide part 52 Propulsion part 53 Support parts 54, 55 First Hydraulic cylinders 56 and 57 Second hydraulic cylinder 58 Hydraulic motor 59 Base 71 Lid member 72 Support shaft 73 Reinforcement plates 74 and 75 Bearing 76 Through hole 77 Sheet pile 78 Connection member 79 Projection piece 111 Tip member 112 Drive transmission member 113 Cylindrical connection Member 121 Rotation drive transmission part 122 Propulsion drive transmission part (drive release guide part)
123 Base 311 Rotating contact portion 312 Propulsion contact portion (drive release contact portion)
591,592 Base rail B Solvent

Claims (13)

A water pipe propulsion leading conductor used for burying the water guiding pipe in the ground, the front conductor main body connected to the tip of the water guiding pipe, and the rear edge of the tip conductor main body notched The cutout portion is a cutout portion having at least two end edges, one end edge serving as a drive transmission portion, and the other end edge serving as a drive release guide portion. Conductor for the conduit. A water pipe propulsion destination conductor that is provided at the tip of the water pipe to embed the water pipe in the ground and that is propelled by transmission of propulsion drive and rotation drive, wherein the tip of the water pipe is inserted. A bottomed cylindrical lead conductor main body connected to the water conduit while permitting, and a plurality of sections formed by dividing the rear edge of the tip conductor main body into a plurality of parts and cutting out the edges of the sections. A plurality of cutout portions, each of which has two end edges, each of which is a cutout portion cut into a congruent, substantially V-shape, and a predetermined side edge of each cutout portion Is a drive transmission unit that receives transmission of propulsion drive and rotation drive, and the remaining edge is a propulsion drive transmission unit that receives transmission of propulsion drive, and this propulsion drive transmission unit is transmitted to the rotation drive transmission unit. This is a drive release guide that releases the rotational drive. Conduit propulsion leading body, wherein. A water pipe propulsion destination conductor that is provided at the tip of the water pipe to embed the water pipe in the ground and that is propelled by transmission of propulsion drive and rotation drive, wherein the tip of the water pipe is inserted. A bottomed cylindrical lead conductor main body connected to the water conduit while allowing it, and a rear edge of the lead conductor main body divided into four parts, and each edge of each section was cut away. Four cutouts, each of the four cutouts having two end edges, each of which is cut out into a congruent, substantially V-shape, and a predetermined side end of each cutout The edge is a drive transmission unit that receives transmission of propulsion drive and rotational drive, and the remaining edge is a propulsion drive transmission unit that receives transmission of propulsion drive. The propulsion drive transmission unit transmits to the rotational drive transmission unit. This is a drive release guide that releases the rotational drive Conduit propulsion leading body, wherein. A water pipe propulsion destination conductor that is provided at the tip of the water pipe to embed the water pipe in the ground and that is propelled by transmission of propulsion drive and rotation drive, wherein the tip of the water pipe is inserted. A bottomed cylindrical lead conductor main body connected to the water conduit while permitting, and a plurality of sections formed by dividing the rear edge of the tip conductor main body into a plurality of parts and cutting out the edges of the sections. A plurality of cutout portions, each of which has two end edges, each of which is a cutout portion cut into a congruent, substantially V-shape, and a predetermined side edge of each cutout portion Is a rotation drive transmission unit that receives transmission of rotation drive, and the remaining edge is a propulsion drive transmission unit that receives transmission of propulsion drive, and this propulsion drive transmission unit is a rotation transmitted to the rotation drive transmission unit. It is a drive release guide that releases the drive. Aqueducts promote destination conductor that. A water pipe propulsion destination conductor that is provided at the tip of the water pipe to embed the water pipe in the ground and that is propelled by transmission of propulsion drive and rotation drive, wherein the tip of the water pipe is inserted. A bottomed cylindrical lead conductor main body connected to the water conduit while allowing it, and a rear edge of the lead conductor main body divided into four parts, and each edge of each section was cut away. Four cutouts, each of the four cutouts having two end edges, each of which is cut out into a congruent, substantially V-shape, and a predetermined side end of each cutout The edge is a rotational drive transmission unit that receives transmission of rotational drive, and the remaining edge is a propulsion drive transmission unit that receives transmission of propulsion drive. The propulsion drive transmission unit is transmitted to the rotational drive transmission unit. It is a drive release guide that releases rotational drive. Aqueducts promote destination conductor that. The said drive transmission part is a drive transmission part which has an edge in a parallel direction with respect to the axial center of a leading conductor, The water conduit promotion tip conductor of Claim 1 characterized by the above-mentioned. 4. The water conduit propulsion leading conductor according to claim 1, wherein the drive release guide portion is a drive release guide portion having an edge in an acute angle direction with respect to the drive transmission portion. 5. 6. The water conduit propulsion leading conductor according to claim 4, wherein the rotation driving transmitting portion is a rotational driving transmitting portion having an edge in a direction parallel to the axis of the leading conductor. 6. The water guide propulsion leading conductor according to claim 4, wherein the drive release guide portion is a drive release guide portion having an edge in an acute angle direction with respect to the rotational drive transmission portion. A culvert drainage pipe embedding method using the water conduit propulsion leading conductor according to any one of claims 1 to 9, wherein the conduit can be disposed while surrounding the water conduit, and a notch of the water conduit propulsion leading conductor is provided at a tip. The tip of the water guide tube is formed by mounting an outer tube having a projection that can be engaged with the unit on the drive unit of a propulsion embedding device that generates a rotational drive force and a propulsion drive force, and a number of drain holes are drilled. And connecting the water pipe to the protrusion at the tip of the outer pipe, and inserting the water pipe into the outer pipe, engaging the notch of the water pipe propulsion conductor with the protrusion at the tip of the outer pipe, By propelling while rotating, propelling the outer pipe and water conduit into the ground, and pulling out the outer pipe rearward after completion of the predetermined length of propulsion, only the above-mentioned water conduit propulsion leading conductor and water conduit are buried in the ground. Underground drainage pipe burial method characterized by A culvert drainage pipe embedding method using the water conduit propulsion leading conductor according to any one of claims 1 to 9, wherein the conduit can be disposed while surrounding the water conduit, and a notch of the water conduit propulsion leading conductor is provided at a tip. The tip of the water guide tube is formed by mounting an outer tube having a projection that can be engaged with the unit on the drive unit of a propulsion embedding device that generates a rotational drive force and a propulsion drive force, and a number of drain holes are drilled. And connecting a conduit guide propellant to the pipe, enclosing a filter material made of synthetic resin in almost the entire area of the conduit, inserting the conduit into the outer pipe, and notching the conduit guide conductor Is engaged with the protrusion at the tip of the outer pipe, propelled while rotating the outer pipe, propelling the outer pipe and the water guide pipe into the ground, and pulling out the outer pipe rearward after completion of the predetermined length of propulsion Only the above-mentioned water pipe propulsion conductor and water pipe are buried in the ground. Underdrain pipe buried method characterized by comprising wearing the lid to the rear end opening of the conduit. A conduit guide propulsion conductor using the conduit guide propellant according to any one of claims 1 to 9, wherein the connection to the tip of the conduit tube is screwing or fixing. A conduit drainage burial method using the conduit guide propulsion conductor according to claim 10 or 11, characterized in that the connection to the tip of the conduit is screwed or fixed.

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