JP2007170511A - Pipeline repairing method and repairing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipeline repairing method and technique of a repairing material capable of achieving facilitation of repair and labor saving while securing water tightness performance of a pipeline repairing portion and a cable protecting function. <P>SOLUTION: This method includes a first process for determining a repair range α in correspondence with a length of an existing pipeline 3 in the axial direction, a second process for removing a pipeline part in the repair range, a third process for using a split sleeve 1 having a length longer than the axial length of the pipeline part corresponding to the repair range and having both ends of which outside diameters are smaller than an inside diameter of the existing pipeline 3 and inserting the both ends of the split sleeve so as to be laid across therein, a fourth process for adhering a joint of the laid silt sleeve by a closing member 2, a fifth process for applying a water stop member 16 between the joint of the slit sleeve and the slit sleeve and the existing pipe line, and a sixth process for placing concrete 17 so as to surround the repair range from the outside after the fifth process. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe repair method for repairing a damaged part of a pipe in which a cable is accommodated, and a repair material used therefor.

  Conventionally, fume pipes are often used as pipes for laying various cables such as power cables and communication cables in the ground or in common grooves. The existing pipe line using the fume pipe may be damaged such as cracks and defects due to various external factors such as civil engineering work and ground deformation.

  When an existing pipeline is damaged, it is necessary to relocate or repair the existing pipeline. Conventionally, relocation / repair of existing pipelines that accommodate cables has been relocated, repaired, and protected by using split waterproof pipes and on-site processing pipelines.

  However, the restoration method lacks water-tightness including waterproof performance, and when replacing the cable contained in the same pipeline after repair, it was moved due to concerns about cable damage due to inflow of soil after repair, etc. And after excavating the repaired and protected part again and removing the protective material for repair, the cable was replaced. Therefore, such a conventional pipeline repair method has the following problems.

(1) Since watertightness is lacking, earth and sand may flow into the repair pipeline, which may cause road surface settlement.
(2) When exchanging cables, it is necessary to excavate the repair site again and remove the repair / protection material.
(3) When the above (2) is implemented urgently, there is a possibility that the road excavation is being controlled, and it takes time from the application for approval to the implementation.
(4) With the above process, extra costs are incurred.
(5) Appropriate management of relocated / repaired parts is required and may become obsolete.

  In Patent Document 1, after removing the damaged part of the cable housing inner pipe laid in the outer pipe of the underground buried pipe by cutting, the half inner pipe is arranged in the removed part, and the half inner pipe A technology for repairing the inner pipe by placing a repair sleeve at the joint between the both ends and the end of the removed part of the inner pipe, and opening the respective repair sleeves to the inner pipe and the half inner pipe. Is disclosed.

JP 2002-171631 A

  However, in the technique described in Patent Document 1, since there are two joints in the half inner pipe, both of which extend over the entire length of the half inner pipe, it takes time and effort even when performing watertight treatment with an adhesive or the like. The nature is bad.

On the other hand, when the pipe to be repaired is, for example, a fume pipe, it is necessary to perform an end treatment or an inner pipe treatment after the damaged portion is cut or broken and removed. This is because, in cable replacement work or the like, there is a possibility that the cable sheath may be damaged by the cut sharp end. Such a problem becomes particularly prominent when the repair target pipelines are arranged in a plurality of stages. Therefore, it is necessary to take measures against such problems of workability, problems of the cable protection function, and problems of watertight performance.

  Therefore, an object of the present invention is to provide a pipeline repair method and a repair material technology that can simplify repair work and save labor while ensuring watertight performance, cable protection function, and the like of pipeline repair locations. There is.

In order to solve the above-mentioned problems, the present invention employs the following means.
The present invention is a pipeline repair method for repairing a damaged portion of an existing pipeline in which a cable is accommodated, and a first step of determining a repair range corresponding to the axial length of the existing pipeline And a second step of removing the pipeline portion within the repair range, and an outer diameter that is longer than the axial length of the pipeline portion corresponding to the repair range and whose both end portions are smaller than the inner diameter of the existing pipeline. A third step in which the split sleeve is formed and both ends of the split sleeve are inserted into the existing pipe line and passed; a fourth step in which the seam of the passed split sleeve is brought into close contact with the closing member; Including a fifth step of applying a water blocking material between the joint and the split sleeve and the existing pipe line, and a sixth step of covering the repair range from the outside by placing concrete after the fifth step. It is a feature.

  According to the present invention, after removing the pipeline portion corresponding to the repair range including the damaged portion of the pipeline, the split sleeve is passed to the removed portion, and the separation portion of the split sleeve is restrained and brought into close contact with the closing member. Above, all you need to do is apply water-stopping material where necessary and cast concrete. In addition, since both ends of the split sleeve are inserted and passed into the existing pipeline, the cut end of the existing pipeline is covered with the split sleeve. Thereby, simplification of repair construction and labor saving can be achieved, ensuring the watertight performance of a pipe repair location, a cable protection function, etc. In particular, since it is a method of inserting into an existing pipe line using a split sleeve, it is possible to work even in a narrow place. Therefore, this pipeline repair method can be suitably employed as a repair method for a body-clamping pipeline in which pipelines are arranged in a plurality of stages.

  In the present invention, the split sleeve has at least a pair of flanges provided at positions opposed to each other along the separation portion, and the flange is constrained by the closing member to close the separation portion of the split sleeve. Is desirable. This is because the water tightness and workability can be improved by bringing the flanges into close contact with each other.

  In the present invention, the split sleeve has a rectangular plate shape that can be bent into a cylindrical shape having an outer diameter smaller than the inner diameter of the existing pipe line, and the flanges are provided on the two opposite sides thereof. It is also possible to adopt a method in which the split sleeve itself is rounded into a cylindrical shape along the inner peripheral surface of the existing pipe line so that the two ends are inserted into the existing pipe line and passed. In this way, when the split sleeve has a plate shape, even if the interval between existing pipelines arranged in multiple rows and multiple stages is narrow, work to dodge them and insert between them or insert into existing pipelines Can be easily performed.

  The present invention is a repair material provided after removing a pipeline part of a repair range including the damaged part when repairing a damaged part of an existing pipe line in which a cable is accommodated, and corresponds to the repair range A split sleeve that is longer than the axial length of the pipe section to be formed and whose both end portions are formed to have an outer diameter smaller than the inner diameter of the existing pipe pipe, and a position opposite to each other along the separation portion of the split sleeve And at least a pair of flanges provided, and a closing member that constrains the flanges and closes the separation portion of the split sleeve.

According to the present invention, the split sleeve is longer than the axial length of the pipeline portion corresponding to the repair range, and both end portions are formed to have outer diameters smaller than the inner diameter of the existing pipeline. Can be inserted and passed through the existing pipeline, and the cut end of the existing pipeline can be covered with the split sleeve. Thereby, the protective function of the cable can be sufficiently exerted, and the troublesome inner surface treatment work that has been conventionally required can be eliminated.

  In the present invention, the split sleeve has a cylindrical shape made of synthetic resin or metal, and has a split shape that is split in one direction at one separating portion extending along the axial direction thereof. It is desirable to have flexibility and axial stretchability. Since the split sleeve itself has flexibility, the split sleeve can be expanded from the separation portion and covered with the cable within its elastic range. In addition, since the split sleeve has a stretchability in the axial direction, it is possible to perform an operation of inserting the split sleeve into the existing pipeline with the length of the split sleeve shortened. Furthermore, when the split sleeve itself is made flexible and stretchable, it is possible to follow even a slight level difference caused by a bias pressure that also causes cracks in the existing pipe line.

  In the present invention, the split sleeve may have a cylindrical shape made of a synthetic resin and split in two directions at two separation portions extending along the axial direction thereof. As described above, when the split sleeve is divided into two, the split sleeve divided into two can be inserted into the existing pipe line separately, so that the workability can be improved correspondingly.

  In the present invention, the split sleeve is made of metal or synthetic resin in a rectangular plate shape that can be bent into a cylindrical shape having an outer diameter smaller than the inner diameter of the existing pipe, and the flanges are formed on the two opposite sides thereof. It can also be set as the structure provided. If comprised in this way, even if the space | interval between the existing pipelines is narrow, the operation | work which inserts between them and inserts in the existing pipeline can be easily performed even if they dodge them. Furthermore, by making the split sleeve made of metal, the structural strength of the repair material can be increased accordingly.

  In the present invention, it is preferable that the flange of the split sleeve is provided only in the central portion excluding both end portions of the split sleeve inserted into the existing pipe line. By not providing the flange of the split sleeve at both ends of the split sleeve with respect to the existing pipe line, the outer peripheral surface of the split sleeve can be brought into close contact with the inner peripheral face of the existing pipe line. Thereby, the usage-amount of a water stop material can be decreased.

  In the present invention, it is preferable that the inner surface of the split sleeve near both axial ends is formed into a tapered surface. When the split sleeve is inserted and passed into the existing pipeline, the cut end of the existing pipeline is covered with the split sleeve. At that time, the inner peripheral surface near both ends of the split sleeve is formed into a tapered surface, so that the entire inner peripheral surface of the repaired portion is finished smoothly. Thereby, since the protective function of the cable 4 is exhibited reliably, the troublesome inner surface processing work which was conventionally required can be made unnecessary.

  ADVANTAGE OF THE INVENTION According to this invention, the sufficient water-tight performance of a pipeline repair location can be ensured, and also the pipeline repair technique which can aim at simplification and labor saving of repair construction, and can be employ | adopted as a permanent measure can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
Fig.1 (a) is a flowchart which shows the pipeline repair construction method of this invention, FIG.1 (b) is the construction procedure figure. FIG. 3 is a cross-sectional view of the repair material. FIG. 4 is a partially enlarged view of FIG. FIG. 5 is a front view for explaining the structure of the repair material and the procedure for passing the repair material between existing pipes.

Example 1
<Repair target pipeline>
2 (a), 2 (b), and 2 (c) are explanatory diagrams showing a transfer and restoration work procedure for a body tightening pipeline (number of cable accommodation strips 9) which is a pipeline to be repaired laid in the common groove. In this body-clamping pipeline, existing pipelines 3 containing cables 4 are arranged in a total of 9 rows, 3 rows in the upper row, 3 rows in the middle row, 3 rows in the lower row, and these are covered with protective concrete C. Yes. When peeling of the protective concrete C, cracking of the cable housing pipe 3 or the like occurs due to various civil engineering work or ground change, it is necessary to repair the cable housing pipe 3. At that time, the middle and lower cable housing pipes 3 are harder to repair than the existing pipes 3 in the upper stage because of the arrangement structure. Or, the existing existing pipeline 3 is harder to repair than the existing existing pipeline 3.

  Therefore, as shown in FIG. 2 (b), in the state where the upper three rows of pipelines 3 are temporarily moved, the middle and lower existing pipelines 3 are repaired, and thereafter, as shown in FIG. 3 (c). In addition, a method of relocating the original existing pipeline 3 in the upper stage (restoring the original shape) can be considered, but it takes time for temporary relocation and relocation. Therefore, in the following embodiments, a simple repair method that can avoid these relocation works is adopted.

<Outline of pipe repair method>
In the repair method of the present invention, as shown in FIG. 1 (a) for the construction flow and in FIG. 1 (b) for the construction procedure, first, a step (S1) of confirming the crack location of the existing pipeline 3, A step (S2) for determining the crack repair range α of the existing pipeline 3, a step (S3) for breaking and removing a part of the existing pipeline within the repair range α, and the quality of the cable in the existing pipeline break range ( A step (S4) for confirming the presence or absence of damage), a step (S5) for placing the repair material S in the existing pipeline breakage range, and a concrete placing step (S6) for covering the repair material S are performed.

<Composition of repair material>
In consideration of the application of the repair method described above, the repair material S shown in FIGS. First, the repair material S will be described.

  The repair material S has a cylindrical shape as a whole, and a split sleeve 1 whose tube wall is separated by a line along the tube axis direction, and a closing member 2 for closing a separation portion (opening / closing portion) of the split sleeve 1 It has. As shown in FIGS. 3, 5, and 6, the repair material S is used to repair a damaged portion of the existing pipeline 3 in which the cable 4 is accommodated. It is provided after removing the part.

  The split sleeve 1 is made of synthetic resin, has flexibility and stretchability (axial stretchability), and is formed so that the separating portion can be opened and widened in the elastic region of the split sleeve 1 itself. ing. Consideration is made so that the size of the opening of the separation portion is equal to or larger than the diameter of the cable 4 in the existing pipeline 3.

  Flange 11, 11 extending in the axial direction of the split sleeve 1 along the separated portion is provided at a position where the separated portion of the split sleeve 1 faces. The flanges 11, 11 are not provided in the portion inserted into the existing pipeline 3. As shown in FIG. 4, protrusions 12, 12 extending in the axial direction of the split sleeve 1 are provided on the outer surfaces of the flanges 11, 11 of the split sleeve 1. The protrusions 12 and 12 have a function as an engaging protrusion for preventing the chuck-type closing member 2 from being detached.

That is, the closing member 2 has a U-shaped cross section, and has engagement pieces 21 and 21 that engage with the protrusions 12 and 12 on the inner surface side. The length of the closing member 2 is the same as that of the flange 11. Therefore, when the closing member 2 is mounted, the flanges 11 and 11 are constrained so as to be sandwiched with each other, and when the closing member 2 is detached, the split sleeve 11 can be opened in a direction in which the flanges 11 and 11 are separated from each other.

  On the inner surfaces of the flanges 11 and 11 facing each other, packing materials 13 and 13 made of synthetic rubber or the like for providing a watertight structure are provided. The opposing mating surfaces 13a, 13a of the packing materials 13, 13 are formed in a corrugated shape that is in surface contact with each other. The direction of the waveform is the radial direction of the split sleeve 1. Thereby, it is considered that the mating surfaces of the packing materials 13 and 13 are not displaced in the radial direction of the split sleeve 1. The shape of the mating surface is not limited to the waveform, and various shapes such as a semicircular shape shown in FIG. 9 or a flat type shown in FIG. 10 can be adopted.

  An expansion / contraction portion 14 formed in a bellows shape is provided at an intermediate portion of the split sleeve 1 in the tube axis direction (length direction). The flange 11 and the ridge 12 are not provided in a range corresponding to the stretchable portion 14 so as not to disturb the function of the stretchable portion 14. The length of the split sleeve 1 in the axial direction can be adjusted by the stretchable portion 14. As shown in FIG. 6, the normal holding length of the split sleeve 1 is formed to be longer than the length between the end portions 31 and 31 from which the conduit portion is removed, that is, the length of the repair range α.

  The outer diameter of both end portions of the split sleeve 1 is formed to be slightly smaller than the inner diameter of the existing pipe line 3. Thus, both end portions of the split sleeve 1 can be inserted into the existing pipeline 3 and passed between the end portions 31 and 31. A preferable dimensional difference between the outer diameter of both ends of the split sleeve 1 and the inner diameter of the existing pipe line 3 is a fitting tolerance. However, the dimensional difference may be slightly larger from the viewpoint of workability, but from the viewpoint of water tightness, the outer peripheral surface of the split sleeve 1 is in a state where the split sleeve 1 is inserted into the existing pipeline 3. It is desirable to consider so that it adheres to the inner peripheral surface of the existing pipeline 3.

  On the inner peripheral surface near both ends of the split sleeve 1, as shown in FIG. 7, an R-processed tapered surface 15 is formed to smooth the step with the inner peripheral surface 3 a of the existing pipe line 3. . The tapered surface 15 is provided to prevent damage to the cable sheath or the like when the cable 4 is replaced.

  In the pipe repair method using the repair material S according to the first embodiment, the pipe part of the repair range α is broken and removed by cutting or striking, and then split using the expansion / contraction part 14 as shown in FIG. The length of the sleeve 1 is shortened, and in this state, the separation portion is expanded in the direction in which the flanges 11 and 11 are separated from each other, and the sleeve 4 is put on the cable 4 as shown in FIG.

  Next, as shown in FIG. 6, the split sleeve 1 is returned to its original length, and the closing member 2 is slid and mounted from the end portion with the flanges 11 and 11 being combined. Then, after applying a swelling type water-stopping material 16 such as bentonite to the joint portion of the stretchable portion 14 where the flange 11 does not exist, the concrete 17 (see FIG. 1) is struck so as to be wider than the repair range α. Install and cover the repair area.

  According to this embodiment, since both end portions of the split sleeve 1 are inserted into the existing pipeline 3 and passed, the cut end portion of the existing pipeline 3 is covered with the split sleeve 1. Furthermore, since the inner peripheral surface near both ends of the split sleeve 1 is formed into a smooth tapered surface 15, the entire inner peripheral surface of the repaired portion is finished smoothly. Thereby, since the protection function of the cable 4 is sufficiently exhibited, it is possible to eliminate the time-consuming inner surface treatment work that has been conventionally required. Further, since the split sleeve 1 is provided with flexibility and stretchability, it is possible to follow a slight level difference caused by the bias pressure that is also a cause of cracks in the existing pipe line 3.

Also, with regard to the construction procedure, after removing the pipe line portion corresponding to the repair range α including the damaged part of the existing pipe line 3, the split sleeve 1 is passed to the removed part, and the split sleeve 1 is separated by the closing member 2. All that is necessary is to apply the water-stopping material 16 to the necessary portions and place the concrete 17 after the portions are restricted and brought into close contact with each other. Thereby, simplification of repair construction and labor saving can be achieved, ensuring the watertight performance of a pipe repair location, a cable protection function, etc. Particularly, since the split sleeve 1 is used for insertion into the existing pipeline 3, it is possible to work even in a narrow place. Therefore, the construction method of the first embodiment can be suitably employed as a repair method for a body-clamping pipeline in which the existing pipelines 3 are arranged in a plurality of stages as shown in FIG.

  In addition, it is good also as a structure which can provide the thin wall hinge extended in a pipe-axis direction in the pipe wall part on the opposite side to the isolation | separation part of the split sleeve 1 with the flange 11, and can open the split sleeve 1 in half.

(Example 2)
11 to 18 show another embodiment of the repair material according to the present invention. In these drawings, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is simplified.

  The repair material S according to the second embodiment has a cylindrical sleeve as a whole, and a split sleeve 1 composed of upper and lower unit sleeves 1a and 1b separated (half-divided) by two lines along the tube axis direction. , And closing members 2 and 2 for closing the separation portion (opening / closing portion) of the split sleeve 1. As shown in FIGS. 11 to 18, the repair material S of this embodiment also repairs the damaged part of the pipe 3 in which the cable 4 is housed, and the existing pipe in the repair range α including the damaged part. It is provided after removing the part.

  The split sleeve 1 is made of a synthetic resin or a material such as FRP having sufficient strength. Flange 11, 11 extending in the axial direction of the split sleeve 1 along the separated portion is provided at a position where the separated portion of the split sleeve 1 faces. On the outer surface of the flanges 11 and 11, as shown in FIG. 13, protrusions 12 and 12 extending in the axial direction of the split sleeve 1 are provided. The flange 11 and the protrusion 12 are not provided in the vicinity of both ends of the split sleeve 1 inserted into the existing pipe line 3. In other words, the split sleeve 1 is provided only in the central portion excluding both end portions where the split sleeve 1 is inserted into the existing pipeline 3.

  The closing member 2 is U-shaped in cross section, and has engagement pieces 21 and 21 that engage with the protrusions 12 and 12 on the inner surface side. A plurality of closing members 2 formed in a strip block shape are used. Thereby, consideration is given so that the mounting work of the closing member 2 can be easily performed.

  As shown in FIGS. 12 and 13, the split sleeve 1 has a length longer than the length between the end portions 31 and 31 from which the pipe portion is removed, that is, the length of the repair range α.

  The outer diameter of both end portions of the split sleeve 1 is formed to be slightly smaller than the inner diameter of the existing pipe line 3. Thus, both end portions of the split sleeve 1 can be inserted into the existing pipeline 3 and passed between the end portions 31 and 31. A preferable dimensional difference between the outer diameter of both ends of the split sleeve 1 and the inner diameter of the existing pipe line 3 is a fitting tolerance. However, the dimensional difference may be slightly larger from the viewpoint of workability.

  On the inner peripheral surface near both ends of the split sleeve 1, an R-processed taper surface 15 for smoothing a step with the inner peripheral surface of the existing pipe line 3 is formed. This taper surface 15 is also provided to prevent damage to the cable sheath or the like when the cable 4 is replaced.

  Band-shaped holding members 5 and 5 are attached to the outer peripheral surface near both ends of the split sleeve 1. The holding member 5 is also halved, and is fixedly attached to the split sleeve 1 by fixing the flanges 51, 51 provided at the mating portions with fastening means such as bolts and nuts 52. The holding member 5 also serves as a separator for the water stop material 16 as will be described later.

  In the pipe repair method using the repair material S according to the second embodiment, after the pipe part of the repair range α is cut or broken and removed, first, as shown in FIG. The sleeve 1 b is inserted into the existing pipelines 3 and 3 from the end portions 31 and 31 of the existing pipeline 3. Next, the upper unit sleeve 1a is inserted into the existing pipeline 3 and overlapped in a cylindrical shape. Thereby, the split sleeve 1 is passed between the existing pipes 3 and 3.

  Next, the holding members 5 and 5 are attached after the closing members 2 are sequentially attached to bring the unit sleeves 1a and 1b into close contact with each other. At this time, the holding members 5 and 5 and the end portions 31 and 31 are mounted while leaving a gap β (see FIGS. 12 and 16). Then, after applying a water stop material 16 such as bentonite to the gap β portion (matching portion), the wedge material 6 is set between each holding member 5 and the end portion 31, and between the end portions 31 and 31. Keep the interval. Thereafter, concrete 17 is placed to cover the repaired part.

  The wedge member 6 may be a screw adjustment type in which the distance between the left and right unit wedge members 61 and 62 can be adjusted by an adjustment screw 63 as shown in FIG. 17, or a wedge-shaped skirting board 64 as shown in FIG. It is good also as a baseboard adjustment type.

  In the second embodiment, the same effects as in the first embodiment can be obtained. In particular, since the split sleeve 1 is of a half type, it is possible to easily perform the work of inserting into the existing pipeline 3. it can.

(Example 3)
19 to 21 show another embodiment of the repair material according to the present invention. In these drawings, the same components as those in the previous embodiment are denoted by the same reference numerals, and the description thereof is simplified.

  The repair material S of the third embodiment includes a flat rectangular split slave 1 formed of a metal plate that can be curved in a cylindrical shape, and a closing member 2 for closing a mating portion of the split sleeve 1. ing. That is, the split sleeve 1 of the third embodiment is not formed in a cylindrical shape in advance as in the first embodiment, but is formed in a plate shape and can be bent into a cylindrical shape. Yes.

  Also in the split sleeve 1, flanges 11, 11 extending in the axial direction of the split sleeve 1 along the separated portion are provided at the opposing positions of the separated portion (matching portion) of the split sleeve 1. On the outer surface of the flanges 11 and 11, as shown in FIG. 21, protrusions 12 and 12 extending in the axial direction of the split sleeve 1 are respectively provided. In the split sleeve 1 of the third embodiment, the flange 11 and the protrusion 12 are not provided near both ends of the split sleeve 1 inserted into the existing pipe line 3. In other words, the split sleeve 1 is provided only in the central portion excluding both end portions where the split sleeve 1 is inserted into the existing pipeline 3.

  The closing member 2 is U-shaped in cross section, and has engagement pieces 21 and 21 that engage with the protrusions 12 and 12 on the inner surface side. A plurality of closing members 2 formed in a strip block shape are used. Thereby, consideration is given so that the mounting work of the closing member 2 can be easily performed.

As shown in FIGS. 20 and 21, the length of the split sleeve 1 is the end 31 from which the pipe line portion is removed.
, 31, that is, longer than the length of the repair range α. On the inner peripheral surface near both ends of the split sleeve 1, an R-processed taper surface 15 for smoothing a step with the inner peripheral surface of the existing pipe line 3 is formed.

  Band-shaped holding members 5 and 5 are attached to the outer peripheral surfaces near both ends of the split sleeve 1 rolled into a cylindrical shape. The holding member 5 is also halved, and is fixedly attached to the split sleeve 1 by fixing flanges 51, 51 provided at the mating portions thereof by fastening means such as bolts and nuts 52.

  Here, the holding members 5 and 5 hold the split sleeve 1 in a cylindrical shape. Further, in order to fix or position the holding members 5 and 5 with respect to the existing pipes 3 and 3, band-like pipe-side holding members 7 and 7 are provided. The pipe-side holding members 7 and 7 are also fixed to the existing pipe 3 by fixing the flanges 72 and 72 provided at the mating portion of the pair of halved band portions 71 with fastening means such as bolts and nuts 73. Mounted in a state. The connecting arms 74 and 74 are passed between the pipe side holding members 7 and 7, and the holding members 5 and 5 are connected to the connecting arms 74 and 74. Accordingly, the holding members 5 and 5 are held by the pipe side holding members 7 and 7, and the split sleeve 1 is held by the holding members 5 and 5.

  In the pipe line repairing method using the repair material S according to the third embodiment, the split sleeve 1 is rolled in accordance with the inner diameter of the existing pipe line 3 (see FIG. 19), and the cable 4 is wrapped around both ends of the existing pipe. Insert into paths 3 and 3. Thereby, the split sleeve 1 is passed between the existing pipelines 3.

  Next, the holding members 5 and 5 are attached after the closing members 2 are sequentially attached to bring the flanges 11 and 11 into close contact with each other. Further, the pipe-side holding members 7 and 7 are mounted, the connecting arms 74 and 74 and the holding members 5 and 5 are connected, and the split sleeve 1 is positioned at its fixed position. Thereafter, concrete 17 is placed to cover the repaired part.

  In the third embodiment, the same effects as those of the first and second embodiments can be obtained. In particular, since the split sleeve 1 has a plate shape, the existing pipe lines arranged in a plurality of rows in a plurality of rows. Even when the interval between the three is narrow, it is possible to easily do the work of inserting between them by dodging them or inserting into the existing pipeline 3. Further, by making the split sleeve 1 made of metal, the structural strength of the existing pipe material for repair can be increased accordingly.

Example 4
22, 23, and 24 are a plan view, a cross-sectional view, and a cross-sectional view showing a fourth embodiment of the present invention. In the first to third embodiments, the split sleeve 1 is inserted into the existing pipeline 3 and passed. However, in the fourth embodiment, the split sleeve 1 is attached to the outer peripheral surface of the existing pipeline 3. Shows an example of a method of repairing by attaching it so that it is wrapped around.

  In this construction method, as the repair material S, either the two-way split sleeve 1 shown in FIG. 23 or the one-way split sleeve 1 shown in FIG. 24 can be used. The one-way split sleeve 1 and the two-way split sleeve 1 both have the points that the flanges 11 and 11 are formed over the entire length of the split sleeve 1, and the closing member 2 is also formed correspondingly longer. Except for the above, they are basically the same as those illustrated in the second embodiment and the first embodiment. Therefore, basically the same parts are denoted by the same reference numerals, and the description thereof is simplified.

In Example 4, the pipe portion of the repair range α having the crack portion 3b of the existing pipe line 3 is left without being removed, and the pipe sleeve is wound around with a bentonite-based waterstop material, and then the split sleeve 1 is closed. A repair pipe member S including the member 2 is used to cover the repair range α, and thereafter, the concrete 17 is placed and covered. In addition, about the part corresponding to the crack part 3b of the inner surface of the existing pipe line 3, if it is a small crack grade, there is little necessity for repairing an inner surface, but before pulling in a cable again as needed, the cross-tech of a past construction method is required. You may use the construction method to repair the inner surface.

The pipe repair method concerning this invention is shown, (a) is a flowchart, (b) is a construction procedure figure. Explanatory drawing of the pipe line for repair which concerns on the Example of this invention. The repair material which concerns on Example 1 of this invention is shown, and the II line sectional drawing of FIG. FIG. 4 is an enlarged cross-sectional view of a portion surrounded by b in FIG. 3, showing a configuration of a matching portion of the repair material (split sleeve) according to the first embodiment of the present invention. The front view of the state which shrunk the repair material which concerns on Example 1 of this invention. The front view of the state which returned the repair material which concerns on Example 1 of this invention. FIG. 7 is an enlarged cross-sectional view taken along the line ha-ha in FIG. 6. The expanded sectional view of the part enclosed with d of FIG. FIG. 5 is an enlarged cross-sectional view similar to FIG. 4, showing another configuration example of the repair material mating portion according to the first embodiment of the present invention. FIG. 5 is an enlarged cross-sectional view similar to FIG. 4, showing still another configuration example of the mating portion of the repair material according to the first embodiment of the present invention. The perspective view of the repair material (split sleeve) which concerns on Example 2 of this invention. The top view of the repair material which concerns on Example 2 of this invention. The enlarged view of the repair material which concerns on Example 2 of this invention. Sectional drawing of the repair material which concerns on Example 2 of this invention (Hermonical-line sectional drawing of FIG. 15). The front view of the repair material which concerns on Example 2 of this invention. The partial expanded sectional view of the repair construction method using the repair material which concerns on Example 2 of this invention. The partial expanded sectional view of the repair construction method using the repair material which concerns on Example 2 of this invention. The partial expanded sectional view of the pipe line repair method using the repair material which concerns on Example 2 of this invention. The partial expanded sectional view of the repair construction method using the repair material which concerns on Example 3 of this invention. The partial expanded front view of the repair construction method using the repair material which concerns on Example 3 of this invention. The partial expanded sectional view of the pipe line repair construction method using the repair material which concerns on Example 3 of this invention. The top view of the pipe line repair method using the repair material which concerns on Example 4 of this invention. Sectional drawing of the pipe line repair construction method using the repair material which concerns on Example 4 of this invention. Sectional drawing of the pipe line repair method using the other repair material which concerns on Example 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Repair material 1 Split sleeve 11 Flange 12 Projection 13 Packing 13a Matching surface 14 Expansion / contraction part 15 Tapered surface 16 Water stop material 17 Concrete 2 Closing member 21 Engagement piece 3 Existing pipe 5 Holding member 6 Wedge material 7 Pipe side holding member

Claims (9)

A pipe repair method for repairing a damaged part of an existing pipe containing a cable inside,
A first step of determining a repair range corresponding to an axial length of the existing pipeline;
A second step of removing the pipeline portion within the repair range;
Using a split sleeve that is longer than the axial length of the pipe portion corresponding to the repair range and whose both ends are formed to have an outer diameter smaller than the inner diameter of the existing pipe, and both ends of the split sleeve are connected to the existing pipe. A third step of inserting and passing in the road;
A fourth step of closing the seam of the split sleeve that has been passed in close contact with a member;
A fifth step of applying a water-stopping material between the joint of the split sleeve and the split sleeve and the existing pipe line;
And a sixth step of placing concrete after the fifth step to cover the repair range from the outside.   The split sleeve has at least a pair of flanges provided at positions facing each other along the separation part, and the flanges are constrained by the closing member to close the separation part of the split sleeve. The pipeline repair method according to claim 1.   The split sleeve has a rectangular plate shape that can be bent into a cylindrical shape having an outer diameter smaller than the inner diameter of the existing pipe line. The flange is provided on two opposite sides of the split sleeve so that the flanges are aligned with each other. 3. The pipeline repair method according to claim 2, wherein the sleeve itself is rolled into a cylindrical shape along the inner peripheral surface of the existing pipeline, and both ends thereof are inserted and passed into the existing pipeline. When repairing a damaged part of an existing pipe line in which a cable is housed inside, a repair material provided after removing the pipe part of the repair range including the damaged part,
A split sleeve that is longer than the length in the axial direction of the pipeline portion corresponding to the repair range, and that both ends are formed to have an outer diameter smaller than the inner diameter of the existing pipeline;
At least a pair of flanges provided at positions facing each other along the separation portion of the split sleeve;
A repair material comprising: a closing member that constrains the flanges and closes the separation portion of the split sleeve.   The split sleeve has a cylindrical shape made of a synthetic resin and has a split shape that is split in one direction by one separating portion extending along the axial direction thereof, and is itself flexible and stretchable in the axial direction. The repair material of Claim 4 which has property.   5. The repair material according to claim 4, wherein the split sleeve has a cylindrical shape made of a synthetic resin, and has a split shape that is split in two directions by two separation portions extending along the axial direction thereof.   The said split sleeve is a rectangular plate shape which can be bent and formed in the cylinder shape of an outer diameter smaller than the internal diameter of the existing pipe line, Comprising: The said flange is provided in the two opposite sides. Repair material.   The repair material according to any one of claims 4 to 7, wherein the flange of the split sleeve is provided only at a central portion excluding both end portions of the split sleeve inserted into an existing pipe line. The repair material according to any one of claims 4 to 8, wherein an inner surface near both ends of the split sleeve is formed into a tapered surface.

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