JP2024048465A - Pipe renovation member and spiral pipe manufacturing method - Google Patents

Abstract

To provide a pipe renovation member capable of suppressing deformation of a connecting part of a lining member and forming a spiral pipe with excellent earthquake resistance.SOLUTION: A pipe renovation member includes a lining member 12 and a reinforcing member 16. The reinforcing member includes a reinforcing base 50 formed in the shape of a groove that opens toward the lining member, and a locked part (extending part) 56 formed on each side wall of the reinforcing base. The reinforcing base is attached to the lining member so as to straddle and cover a connection part of the lining member, with the locked part being locked to a locking part (claw part) of the lining member.SELECTED DRAWING: Figure 9

Description

This invention relates to a pipe rehabilitation member and a method for manufacturing a helical pipe, which are used in a pipeline rehabilitation method in which a helical pipe is formed by winding a lining member in a spiral shape and connecting adjacent side edges of the lining member, while feeding the helical pipe into an existing pipe.

One example of a conventional pipe rehabilitation member is disclosed in Patent Document 1. In the technology of Patent Document 1, a pipe rehabilitation member (strip-shaped member) includes a lining member (strip-shaped body) and a reinforcing member (reinforcing material). The lining member has a strip-shaped base plate. A joint protrusion is formed on one side edge of this base plate, and a joint recess into which the joint protrusion is fitted is formed on the other side edge. In addition, a plurality of reinforcing ribs are formed on the outer surface (back surface) of the base plate. A metal reinforcing member is attached to the lining member by engaging with these reinforcing ribs. When rehabilitating an existing pipe, a pipe making machine installed in a manhole is used to spirally wind the lining member and connect the side edges of the lining member to form a spiral pipe (rehabilitation pipe), and the spiral pipe made in the manhole is fed into the existing pipe one after another.

JP 2015-105658 A

A certain level of strength is required for the spiral pipes used to rehabilitate existing pipes, but with the technology of Patent Document 1, the strength of the parts connecting the side edges of the lining members is low, leaving concerns about the strength of the resulting spiral pipe. In particular, if the strength of the connecting parts of the lining members is low, there is a risk that when an earthquake occurs after construction and a tensile force (pulling force) acts on the spiral pipe, the connecting parts of the lining members will deform, reducing their water-stopping ability.

Therefore, the primary object of this invention is to provide a new pipe rehabilitation component and a method for manufacturing a spiral pipe.

Another object of the present invention is to provide a pipe rehabilitation member and a method for manufacturing a helical pipe that can suppress deformation of the connecting portion of the lining member and form a helical pipe with excellent earthquake resistance.

The first invention is a pipe rehabilitation member used in a pipeline rehabilitation method in which a lining member is wound in a spiral shape and adjacent side edges of the lining member are connected to form a spiral pipe while feeding the spiral pipe into an existing pipe. The pipe rehabilitation member includes a lining member and a reinforcing member attached to the outer surface of the spirally wound lining member. The lining member includes a strip-shaped lining base having one main surface that constitutes the inner surface of the spiral pipe, and a locking portion formed on each of both sides of the other main surface of the lining base (i.e., the surface on the outer surface when the spiral pipe is formed). The reinforcing member has a strip-shaped top wall and a pair of strip-shaped side walls extending from both side edges of the top wall, and includes a reinforcing base formed in a groove that opens toward the lining member side, and a locking portion formed on each of the pair of side walls. The reinforcing member is attached to the lining member so as to straddle and cover the connecting portion of the lining member by locking the locking portion to the locking portion.

In the first invention, the pipe rehabilitation member includes a lining member and a reinforcing member, and is used in a pipeline rehabilitation method in which a spiral pipe is formed and fed into an existing pipe. The lining member comprises a strip-shaped lining base having one main surface that constitutes the inner surface of the spiral pipe, and an engagement portion formed on each of both sides of the other main surface of the lining base. Meanwhile, the reinforcing member comprises a reinforcing base formed in a groove shape that opens toward the lining member, and an engaged portion formed on each of a pair of side walls of the reinforcing base. The engaged portion of the reinforcing member is engaged with the engaging portion of the lining member, and the reinforcing member is attached to the lining member so as to straddle and cover the connecting portion of the lining member.

According to the first invention, a reinforcing member is provided that is attached so as to straddle and cover the connecting portion of the lining member, so that even during an earthquake, deformation of the connecting portion of the lining member can be appropriately suppressed, and the water-stopping properties of the connecting portion can be ensured. In other words, a helical pipe that can demonstrate high earthquake resistance can be formed. In addition, because the connecting portion of the lining member is protected by the reinforcing member, when the formed helical pipe is fed into the existing pipe, the connecting portion of the lining member can be prevented from rubbing against the inner surface of the existing pipe and being damaged.

The second invention is dependent on the first invention and includes a connecting member that is attached to the outer surface side of the spirally wound lining member and connects adjacent side edges of the lining member.

According to the second invention, adjacent side edges of the lining members are connected to each other using a connecting member, so that when forming the helical pipe, it is easy to match the circumferential length (diameter) of adjacent lining members, and a helical pipe with a uniform diameter over the entire axial length can be formed.

The third invention is dependent on the first or second invention, and when a reinforcing member is attached to a spirally wound lining member to form a helical tube, at least a portion of the top wall of the reinforcing base is located at the outermost position in the radial direction of the helical tube.

According to the third invention, when the formed spiral pipe is fed into the existing pipe, the entire lining member can be prevented from being rubbed against the inner surface of the existing pipe and being damaged.

The fourth invention is dependent on the first or second invention, and when a reinforcing member is attached to a spirally wound lining member to form a helical tube, both side surfaces of the connecting portion of the lining member are sandwiched between a pair of side walls of the reinforcing base.

According to the fourth invention, deformation of the connecting portion of the lining member can be more effectively suppressed.

The fifth invention is dependent on the first or second invention, and when a reinforcing member is attached to a spirally wound lining member to form a helical tube, the outer surface of the connecting portion of the lining member is pressed down by the top wall of the reinforcing base.

According to the fifth invention, deformation of the connecting portion of the lining member is suppressed, and the fit can be maintained more securely.

The sixth invention is a method for manufacturing a helical pipe in a pipeline rehabilitation method in which a helical pipe is formed and fed into an existing pipe, the method including the steps of (a) winding a lining member in a helical shape and connecting adjacent side edges of the lining member, and (b) after step (a), attaching a reinforcing member to the outer surface of the lining member so as to straddle and cover the connecting portion of the lining member.

According to the sixth invention, the reinforcing member is attached so as to straddle and cover the connecting portion of the lining member, so that even during an earthquake, deformation of the connecting portion of the lining member can be appropriately suppressed, and the water-stopping properties of the connecting portion can be ensured. In other words, a helical pipe that can demonstrate high earthquake resistance can be formed. In addition, because the connecting portion of the lining member is protected by the reinforcing member, when the formed helical pipe is fed into the existing pipe, the connecting portion of the lining member can be prevented from rubbing against the inner surface of the existing pipe and being damaged.

The seventh invention is dependent on the sixth invention, and in step (a), adjacent side edge portions of the lining member are connected to each other using a connecting member, and in step (b), a reinforcing member is attached to the lining member so that the reinforcing member straddles and covers the connecting portion of the lining member including the connecting member.

According to this invention, even during an earthquake, deformation of the connecting parts of the lining members can be appropriately suppressed, and water-stopping properties can be ensured. In other words, a helical pipe with excellent earthquake resistance can be formed. In addition, when the formed helical pipe is fed into an existing pipe, the connecting parts of the lining members can be prevented from rubbing against the inner surface of the existing pipe and being damaged.

The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments given below with reference to the drawings.

1 is a schematic diagram showing the process of rehabilitating an existing pipe using a pipe rehabilitation member according to one embodiment of the present invention; FIG. 1A and 1B are diagrams showing how a spiral pipe is formed using a pipe rehabilitation member. 4 is a perspective view showing a lining member provided in the pipe rehabilitation member. FIG. FIG. 4 is a cross-sectional view showing a lining member. 1 is a perspective view showing a connecting member provided in a pipe rehabilitation member. FIG. FIG. 4 is a perspective view showing a reinforcing member provided in the pipe rehabilitation member. FIG. FIG. 4 is a cross-sectional view showing a reinforcing member. FIG. 11 is a perspective view showing a state in which a reinforcing member is attached to a lining member. 10 is a cross-sectional view showing a state in which a reinforcing member is attached to a lining member. FIG. 11 is an enlarged cross-sectional view showing the periphery of the reinforcing member of FIG. 10 . A cross-sectional view showing a lining member provided in a pipe rehabilitation member of another embodiment of the present invention. A cross-sectional view showing a connecting member provided in a pipe rehabilitation member. A cross-sectional view showing a reinforcing member provided in a pipe rehabilitation member. FIG. 11 is a perspective view showing a state in which a reinforcing member is attached to a lining member. 10 is a cross-sectional view showing a state in which a reinforcing member is attached to a lining member. FIG. 17 is an enlarged cross-sectional view showing the periphery of the reinforcing member of FIG. 16.

Referring to FIG. 1, a pipe rehabilitation member 10 according to one embodiment of the present invention is used in a push-in type pipeline rehabilitation method in which a lining member 12 is spirally wound inside a starting manhole 110 to form a helical pipe 102 (rehabilitation pipe), and the formed helical pipe 102 is then fed sequentially into an existing pipe 100. As will be described in detail later, the pipe rehabilitation member 10 of this embodiment is composed of a lining member 12, a connecting member 14 that connects the side edges of the lining member 12, and a reinforcing member 16 that reinforces the connecting portion of the lining member 12.

The pipe rehabilitation member 10 can be used to rehabilitate various existing pipes 100, such as those made of reinforced concrete, synthetic resin, and metal. The pipe rehabilitation member 10 is also suitable for use in rehabilitating sewer pipes with a diameter of 300 mm or more and 1000 mm or less, and is particularly suitable for use in rehabilitating sewer pipes with a diameter of 800 mm or more and 1000 mm or less. However, the pipe rehabilitation member 10 can also be used to rehabilitate existing pipes 100 with a diameter exceeding 1000 mm.

The spiral pipe 102 formed using the pipe rehabilitation member 10 is reinforced by the reinforcing member 16, so it is basically used as a free-standing pipe that maintains its strength independent of the existing pipe 100. However, the spiral pipe 102 can also be used as a composite pipe integrated with the existing pipe 100 by a filling material.

1 and 2, the pipe rehabilitation member 10 is a member for forming a helical pipe 102, and includes a lining member 12, a connecting member 14, and a reinforcing member 16. In this embodiment, the lining member 12 has an engaging portion (first engaging portion 22, protrusion 34) with the connecting member 14 and the reinforcing member 16 on the outer surface side when wound in a spiral shape. The connecting member 14 is attached to the lining member 12 from the outer surface side of the lining member 12 wound in a spiral shape. The reinforcing member 16 is attached to the lining member 12 from the outer surface side of the lining member 12 so as to straddle and cover the connecting portion of the lining members 12 connected by the connecting member 14. The configurations of the lining member 12, the connecting member 14, and the reinforcing member 16 will be specifically described below.

As shown in Figures 3 and 4, the lining member 12 is a long member that is the main component of the helical tube 102, and includes a strip-shaped base body 20 (lining base body). One main surface 20a of the base body 20 is a surface that constitutes the inner surface of the helical tube 102, and is a smooth surface. The width of the base body 20 is, for example, 75 mm, and the thickness (wall thickness) of the base body 20 is, for example, 2.5 mm.

On the other main surface 20b side of the base 20, that is, on both sides of the outer surface side when the lining member 12 is wound in a spiral shape, a first fitting portion 22 is formed to fit with a second fitting portion 42 of the connecting member 14 described later. The first fitting portion 22 is formed in a groove shape including a first protrusion 24 and a second protrusion 26 extending in the longitudinal direction of the base 20. The first protrusion 24 is formed on both side edges of the other main surface 20b of the base 20, and the second protrusion 26 is formed on the inside in the width direction of the base 20 from the first protrusion 24. A first locking piece 24a that protrudes toward the inside in the width direction of the base 20 is formed at the tip of one side surface of the first protrusion 24 (the inner surface in the width direction of the base 20). This first locking piece 24a is engaged with a second locking piece 42a of the second fitting portion 42 of the connecting member 14. Additionally, the second ridge 26 cooperates with the first ridge 24 to clamp the second fitting portion 42 of the connecting member 14.

Inside the first fitting portion 22, that is, on the other main surface 20b side of the base 20 between the first ridge 24 and the second ridge 26, a water-stopping member 28 formed in a long round rod shape made of an elastic body such as elastomer is provided. However, the shape of the water-stopping member 28 can be changed as appropriate, and it may be formed in a long strip shape with a rectangular cross section. When the first fitting portion 22 of the lining member 12 and the second fitting portion 42 of the connecting member 14 are fitted together, the water-stopping member 28 is compressed by being sandwiched between the other main surface 20b of the base 20, one side of the first ridge 24, and the tip of the second fitting portion 42 (see FIG. 11). This ensures water-stopping (watertightness) at the connecting portion of the lining member 12.

In addition, a displacement absorbing section 30 is formed in the widthwise center of the base 20, in which a part of the base 20 is loosened in the width direction so as to protrude toward the other main surface 20b. The displacement absorbing section 30 has a pair of side wall sections 30a formed to expand in the width direction as it moves away from the one main surface 20a, and a connecting section 30b connecting the tip ends of the side wall sections 30a. A gap 32 is formed between the base ends of the displacement absorbing section 30. The protruding height of the displacement absorbing section 30 from the other main surface 20b is, for example, 12 mm, and the width of the gap 32 is, for example, 1 mm. By having such a displacement absorbing section 30 in the base 20, the spiral pipe 102 formed using the lining member 12 becomes easily deformed in the axial direction and the bending direction at the portion of the displacement absorbing section 30. Therefore, when the spiral pipe 102 is fed into the existing pipe 100, the spiral pipe 102 can follow the curved section, bent section, and step section of the existing pipe 100. Furthermore, if an earthquake occurs after the helical pipe 102 is installed, the displacement absorbing section 30 expands to absorb axial and circumferential displacement (bending), thereby suppressing deformation of the connecting portion of the lining member 12.

In addition, in this embodiment, a protrusion 34 (third protrusion) extending in the longitudinal direction of the base 20 is formed on each side of the other main surface 20b of the base 20, on the inside of the second protrusion 26 in the width direction of the base 20. A claw portion 34a protruding toward the inside of the width direction of the base 20 is formed at the tip of one side surface of this protrusion 34 (the inner surface in the width direction of the base 20). This claw portion 34a functions as a locking portion that locks the locked portion (the tip of the extension portion 56) of the reinforcing member 16 described later. The protrusion 34 protrudes from the other main surface 20b by a height of, for example, 14 mm, and the protrusion 34 has a width (thickness) of, for example, 3 mm. The protrusion 34 protrudes from one side surface of the protrusion 34 by a height of, for example, 2 mm.

Such a lining member 12 is integrally molded by extrusion molding of synthetic resin such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, and rigid polyvinyl chloride resin. The first fitting portion 22 (first ridge 24 and second ridge 26), displacement absorbing portion 30, and ridge 34 are formed over the entire longitudinal length of the base body 20. The lining member 12 of this embodiment is formed from high-density polyethylene resin. The water-stopping member 28 is also provided over the entire longitudinal length of the base body 20.

As shown in Figures 5 and 6, the connecting member 14 is a long member for connecting the side edges of the lining member 12, and includes a strip-shaped base body 40 (connecting base body). The width of the base body 40 is, for example, 22 mm, and the thickness of the base body 40 is, for example, 3 mm.

One main surface 40a of the base 40 is the surface facing the other main surface 20b of the base 20 of the lining member 12, and a second fitting portion 42 that fits into the first fitting portion 22 of the lining member 12 is formed on both sides of the one main surface 40a of the base 40. The second fitting portion 42 is a protrusion extending in the longitudinal direction of the base 40, and a second locking piece 42a that engages with the first locking piece 24a of the lining member 12 is formed at the tip of one side surface of the second fitting portion 42 (the inner surface in the width direction of the base 40).

Such a connecting member 14 is integrally formed by extrusion molding of a synthetic resin such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, and rigid polyvinyl chloride resin. The second fitting portion 42 is formed over the entire longitudinal length of the base body 40. The connecting member 14 in this embodiment is formed from high-density polyethylene resin.

7 and 8, the reinforcing member 16 is a long member for reinforcing the connecting portion of the lining member 12, that is, the portion where the side edges of the lining member 12 are connected by the connecting member 14, and for improving the strength of the entire spiral pipe 102 to be formed, and includes a reinforcing base 50. The reinforcing base 50 is formed in a groove shape (half-square tube shape) including a band-shaped top wall 52 and a pair of band-shaped side walls 54 extending from both side edges of the top wall 52. One main surface 52a of the top wall 52 is a surface facing the other main surface 20b of the base 20 of the lining member 12, and each of the side walls 54 extends in a direction perpendicular to the top wall 52 so as to face the lining member 12 side from both side edges of the top wall 52. In other words, the reinforcing base 50 is formed in a groove shape that opens toward the lining member 12 side.

In addition, an extension 56 that fits with the lining member 12 is formed at the tip of each side wall 54, i.e., at each of the opening edges of the reinforcing base 50. In this embodiment, the extension 56 extends from the tip of the side wall 54 toward the inside of the reinforcing base 50 in the width direction. The extension 56 includes a first piece 56a that bends from the tip of the side wall 54 and extends parallel to the top wall 52, and a second piece 56b that bends from the tip of the first piece 56a and extends diagonally toward the top wall 52. The tip of the second piece 56b of this extension 56 functions as a locked portion that is locked by the locking portion (claw portion 34a) of the lining member 12.

The material of the reinforcing member 16 is not particularly limited, but is preferably a metal such as steel, stainless steel, titanium, or aluminum alloy from the viewpoint of high rigidity. In this embodiment, the reinforcing member 16 is formed by bending a strip-shaped steel material (steel plate) into the above-mentioned shape. The thickness of the reinforcing member 16 is, for example, 1.6 mm. The width of the reinforcing member 16 (width of the top wall 52) is set larger than the width of the connecting member 14 (width of the base 40), for example, 50 mm. The height dimension of the reinforcing member 16 (height dimension of the side wall 54) is set larger than the height dimension of the connecting member 14, for example, 20 mm. Such a reinforcing member 16 is provided over the entire length of the connecting portion of the lining member 12.

As shown in Figures 9 to 11, when connecting adjacent side edges of the spirally wound lining member 12 with the connecting member 14, the side edges of the base 20 of the lining member 12 are butted together so that the main surfaces 20a of the base 20 of the lining member 12 are flush with each other. Then, the connecting member 14 is pushed in from the outer surface side of the spirally wound lining member 12, and the second fitting portion 42 of the connecting member 14 is fitted sequentially into the first fitting portion 22 of the lining member 12 in the longitudinal direction (spiral direction). Then, the second fitting portion 42 is sandwiched between the first protrusion 24 and the second protrusion 26 of the first fitting portion 22, and the first locking piece 24a of the first protrusion 24 and the second locking piece 42a of the second fitting portion 42 are engaged, and the side edges of the lining member 12 are connected by the connecting member 14.

In this way, by connecting using the connecting member 14, the lining member 12 can be rotated and positioned, and then the side edges of the lining member 12 can be connected and fixed together using the connecting member 14. Therefore, when forming the helical pipe 102, it is easy to match the circumferential length (diameter) of adjacent lining members 12, and a helical pipe 102 with a uniform diameter over the entire axial length can be formed.

When attaching the reinforcing member 16 to the connecting portion of the lining member 12, the reinforcing member 16 is pushed in from the outer surface side of the lining member 12 so as to bridge the adjacent side edges of the lining member 12, and the extension portion 56 of the reinforcing member 16 is sequentially fitted in the longitudinal direction (helical direction) to the protrusion 34 of the lining member 12. Then, the tip of the extension portion 56 of the reinforcing member 16 is engaged by the claw portion 34a of the lining member 12, and the reinforcing member 16 is attached to the lining member 12 so as to straddle and cover the connecting portion of the lining member 12 including the connecting member 14.

In this way, by providing the reinforcing member 16 that is attached so as to straddle and cover the connecting portions of the lining members 12, the resistance force in the tensile direction (the direction in which the lining members 12 move away from each other) is increased in the connecting portions of the lining members 12. Therefore, even if a tensile force acts on the helical tube 102 during an earthquake or the like, the reinforcing member 16 can suppress deformation of the connecting portions of the lining members 12 (particularly the first fitting portion 22 and the second fitting portion 42), and the water-stopping performance of the water-stopping member 28 can be ensured. In addition, since the axial displacement of the helical tube 102 can be absorbed by the displacement absorbing portion 30, the lining member 12 having the displacement absorbing portion 30 can more reliably suppress deformation of the connecting portions of the lining members 12.

In addition, by attaching the reinforcing member 16, the rigidity of the connecting portion of the lining member 12 can be increased, and thus the rigidity of the helical tube 102 can be increased. Therefore, flattening of the helical tube 102, that is, bending of the helical tube 102 inward and outward in the radial direction, can be prevented or reduced. Furthermore, since the reinforcing member 16 ensures the connecting strength of the lining member 12, there is no need to increase the thickness of the first fitting portion 22 (first ridge 24 and second ridge 26) or the second fitting portion 42 to increase the connecting strength, and the thickness can be made uniform with other portions. In other words, the entire members of the lining member 12 and the connecting member 14 can be made uniform in thickness, making it easier to mold the lining member 12 and the connecting member 14.

Furthermore, since the reinforcing member 16 protects the connecting portion of the lining member 12, it is possible to prevent the connecting portion of the lining member 12 from rubbing against the inner surface of the existing pipe 100 and being damaged when the formed helical pipe 102 is fed into the existing pipe 100. In particular, in this embodiment, when the reinforcing member 16 is attached to the helical wound lining member 12 to form the helical pipe 102, the top wall 52 of the reinforcing base 50 is located at the outermost position in the radial direction of the helical pipe 102. In other words, the outer surface of the top wall 52 of the reinforcing base 50 is located radially outward from the outer surface of the connecting portion 30b of the displacement absorbing portion 30 of the lining member 12 and the tip of the protrusion 34. Therefore, when the spiral pipe 102 is fed into the existing pipe 100, the top wall 52 of the reinforcing base 50 slides against the inner surface of the existing pipe 100, and the lining member 12 does not or does not slide against the inner surface of the existing pipe 100, so the entire lining member 12 can be adequately protected.

Next, referring to FIG. 1, an example of a pipeline rehabilitation method for rehabilitating an existing pipe 100 using the above-described pipe rehabilitation member 10 will be specifically described. In this embodiment, the existing pipe 100 between the starting manhole 110 and the arrival manhole 112 will be rehabilitated.

When rehabilitating an existing pipe 100, first, a pipe making machine 114 is installed inside the starting manhole 110, and a pipe rehabilitation member 10 including a lining member 12, a connecting member 14, and a reinforcing member 16 is installed on the ground near the starting manhole 110. The lining member 12, the connecting member 14, and the reinforcing member 16 may be individually prepared and wound into rolls for installation. The inside of the existing pipe 100 is cleaned in advance using a high-pressure washer or the like.

Next, the lining member 12, the connecting member 14, and the reinforcing member 16 are supplied from the ground to a pipe making machine 114 installed in the starting manhole 110, and the spiral pipe 102 formed using this pipe making machine 114 is fed sequentially from inside the starting manhole 110 into the existing pipe 100. In the pipe making machine 114, the lining member 12 is wound spirally so that the side edges of the base 20 of the lining member 12 are butted together, and the connecting member 14 is attached from the outer surface side of the lining member 12 to connect adjacent side edges of the lining member 12. The spiral pipe 102 is formed by attaching the reinforcing member 16 to the outer surface side of the lining member 12 so that the reinforcing member 16 straddles and covers the connecting portion of the lining member 12 including the connecting member 14. The outer diameter of the spiral pipe 102 (the outer diameter of the top wall 52 of the reinforcing base 50) is set to be slightly smaller than the inner diameter of the existing pipe 100.

The spiral pipe 102 produced in the pipe-making machine 114 is pushed out of the pipe-making machine 114 in order from the produced portion, and is fed into the existing pipe 100 toward the destination manhole 112 while rotating. Once the spiral pipe 102 has been installed over the entire length of the existing pipe 100's rehabilitation section, the rehabilitation of the existing pipe 100 is completed by carrying out appropriate cleanup work. Note that when the spiral pipe 102 is integrated with the existing pipe 100 to form a composite pipe, a process of injecting a filler material between the existing pipe 100 and the spiral pipe 102 is performed after the construction of the spiral pipe 102.

As described above, according to this embodiment, the reinforcing member 16 is attached so as to straddle and cover the connecting portion of the lining member 12. Therefore, even if the helical pipe 102 is subjected to axial displacement during an earthquake or the like, deformation of the connecting portion of the lining member 12 can be appropriately suppressed, and the water-stopping properties of the connecting portion can be ensured. In other words, it is possible to form a helical pipe 102 (rehabilitated pipe) that can exhibit high earthquake resistance during an earthquake.

In addition, the connecting portion of the lining member 12 is protected by the reinforcing member 16, so that when the formed spiral pipe 102 is fed into the existing pipe 100, the connecting portion of the lining member 12 can be prevented from rubbing against the inner surface of the existing pipe 100 and being damaged.

Next, a pipe rehabilitation member 10 according to another embodiment (second embodiment) of the present invention will be described with reference to Figures 12 to 17. The pipe rehabilitation member 10 according to the second embodiment includes a lining member 12, a connecting member 14, and a reinforcing member 16, similar to the above-mentioned embodiment (first embodiment), but the configuration of the fitting portion between the lining member 12, the connecting member 14, and the reinforcing member 16 differs from that of the first embodiment. As the other parts are similar, parts common to the first embodiment are given the same reference numbers, and duplicate descriptions will be omitted or simplified.

As shown in FIG. 12, the lining member 12 comprises a strip-shaped base body 20. A first fitting portion 22 that fits into the second fitting portion 42 of the connecting member 14 is formed on each of both sides of the other main surface 20b of the base body 20. The first fitting portion 22 in the second embodiment is a protrusion extending in the longitudinal direction of the base body 20, and a locking piece 22a that protrudes toward the inside of the width direction of the base body 20 is formed at the tip of one side of this first fitting portion 22. In addition, a displacement absorbing portion 30 is formed in the center of the width direction of the base body 20, in which a part of the base body 20 is loosened in the width direction so as to protrude toward the other main surface 20b side.

Furthermore, on each side of the other main surface 20b of the base 20, a protrusion 34 that is an engagement portion with the reinforcing member 16 is formed on the inside in the width direction of the base 20 from the first engagement portion 22. A claw portion 34a that protrudes toward the inside in the width direction of the base 20 is formed at the tip of the other side surface of this protrusion 34 (the outer surface in the width direction of the base 20). This claw portion 34a functions as a locking portion that locks the locked portion of the reinforcing member 16 (the tip of the extension portion 56).

As shown in FIG. 13, the connecting member 14 includes a strip-shaped base body 40. On both sides of one main surface 40a of the base body 40, a second fitting portion 42 is formed to fit with the first fitting portion 22 of the lining member 12. The second fitting portion 42 of the second embodiment is formed in a groove shape including a first protrusion 60 and a second protrusion 62 extending in the longitudinal direction of the base body 40. The first protrusion 60 is formed on both side edges of the base body 40. The second protrusion 62 is formed in the center of the width of the base body 40 and serves as the second fitting portion 42 on both sides. At the tip of one side surface of the first protrusion 60 (the inner surface in the width direction of the base body 40), a locking piece 60a is formed that protrudes toward the inside of the width direction of the base body 40. This locking piece 60a is engaged with the locking piece 22a of the lining member 12. Additionally, the second ridge 62 cooperates with the first ridge 60 to clamp the first fitting portion 22 of the lining member 12. Furthermore, a water-stopping member 28 is provided inside the second fitting portion 42.

As shown in FIG. 14, the reinforcing member 16 has a reinforcing base 50 formed in a groove shape including a strip-shaped top wall 52 and a pair of strip-shaped side walls 54 extending from both side edges of the top wall 52. An extension portion 56 that is an engagement portion with the lining member 12 is formed at the tip of each side wall 54. The extension portion 56 in the second embodiment extends from the tip of the side wall 54 toward the outside in the width direction of the reinforcing base 50, and bends from the tip of the side wall 54 to extend obliquely toward the top wall 52 side (diametrically outward). The tip of this extension portion 56 functions as an engaged portion that is engaged by the engaging portion (claw portion 34a) of the lining member 12.

As shown in Figures 15 to 17, when connecting adjacent side edges of the spirally wound lining member 12 with the connecting member 14, the side edges of the base 20 of the lining member 12 are butted together so that the main surfaces 20a of the base 20 of the lining member 12 are flush with each other. Then, the connecting member 14 is pushed in from the outer surface side of the spirally wound lining member 12, and the second fitting portion 42 of the connecting member 14 is fitted sequentially in the longitudinal direction into the first fitting portion 22 of the lining member 12. Then, the first fitting portion 22 is sandwiched between the two ridges 60, 62 of the second fitting portion 42, and the locking piece 22a of the first fitting portion 22 and the locking piece 60a of the first ridge 60 are engaged, and the side edges of the lining member 12 are connected by the connecting member 14.

When attaching the reinforcing member 16 to the connecting portion of the lining member 12, the reinforcing member 16 is pushed in from the outer surface side of the lining member 12 so as to bridge the adjacent side edges of the lining member 12, and the extension portion 56 of the reinforcing member 16 is sequentially fitted in the longitudinal direction against the protrusions 34 of the lining member 12. Then, the tip of the extension portion 56 of the reinforcing member 16 is engaged by the claw portion 34a of the lining member 12, and the reinforcing member 16 is attached to the lining member 12 so as to straddle and cover the connecting portion of the lining member 12 including the connecting member 14.

At this time, that is, when the reinforcing member 16 is attached to the spirally wound lining member 12 to form the spiral pipe 102, the top wall 52 of the reinforcing base 50 is located at the outermost position in the radial direction of the spiral pipe 102. This prevents the lining member 12 from being scratched by the inner surface of the existing pipe 100. In addition, at this time, in the second embodiment, both side surfaces of the connecting portion of the lining member 12 (specifically, the other side surface of the first protrusion 60 of the connecting member 14) are sandwiched between a pair of side walls 54 of the reinforcing base 50. This makes it possible to more effectively suppress deformation of the connecting portion of the lining member 12, that is, deformation such that the first protrusion 60 of the second fitting portion 42 opens outward in the width direction.

In this second embodiment, as in the first embodiment described above, a reinforcing member 16 is provided that is attached so as to straddle and cover the connecting portion of the lining member 12, so that a helical pipe 102 with excellent earthquake resistance can be formed. In addition, when the formed helical pipe 102 is fed into the existing pipe 100, the connecting portion of the lining member 12 can be prevented from rubbing against the inner surface of the existing pipe 100 and being damaged.

The specific configurations and shapes of the pipe rehabilitation member 10 (lining member 12, connecting member 14, and reinforcing member 16) given in each of the above-mentioned embodiments are merely examples and can be modified as appropriate. The pipe rehabilitation member 10 may have a configuration in which the reinforcing member 16 is attached to the lining member 12 so as to straddle and cover the connecting portion of the lining member 12.

For example, the side edges of the lining member 12 do not necessarily need to be connected using the connecting member 14. The side edges of the lining member 12 can be directly connected to each other by forming mating parts that can fit into each other on both side edges of the lining member 12. In other words, the connecting part of the lining member 12 may or may not include the connecting member 14.

In the second embodiment described above, when the spiral tube 102 is formed, both sides of the connecting portion of the lining member 12 are sandwiched between a pair of side walls 54 of the reinforcing base 50 of the reinforcing member 16, both sides of the fitting portion (second fitting portion 42) of the connecting member 14 are abutted against the side walls 54, but this is not limited thereto. In cases such as when the fitting portion (first fitting portion 22) of the lining member 12 is formed in a groove shape, both sides of the fitting portion of the lining member 12 may be abutted against the side walls 54.

In addition, in each of the above-mentioned embodiments, when the spiral tube 102 is formed, a space is formed between the outer surface of the connecting portion of the lining member 12 (the outer surface of the base 40 of the connecting member 14) and the top wall 52 of the reinforcing base 50, but this is not limited to the above. The outer surface of the connecting portion of the lining member 12 may be pressed by the top wall 52 of the reinforcing base 50. This suppresses deformation of the connecting portion of the lining member 12, and the fit can be more reliably maintained. When pressing the connecting portion of the lining member 12 by the top wall 52 of the reinforcing base 50, a protrusion extending in the longitudinal direction may be formed on the outer surface of the base 40 of the connecting member 14, and this protrusion may be pressed by the top wall 52 of the reinforcing base 50.

Furthermore, in each of the above-mentioned embodiments, the top wall 52 of the reinforcing base 50 is formed in a flat plate shape in the width direction (axial direction of the helical tube), but this is not limited thereto, and the top wall 52 of the reinforcing base 50 can also be formed in a curved plate shape or a corrugated plate shape that curves in the width direction. Also, in each of the above-mentioned embodiments, the side wall 54 of the reinforcing base 50 is formed so as to be perpendicular to the top wall 52 (or the base 20 of the lining member 12), but it can also be formed so as to be inclined inward or outward in the width direction. However, in this case, it is more preferable that the side wall 54 is inclined toward the outside in the width direction. This is because the connection of the lining member 12 can be strengthened.

In addition, in each of the above-mentioned embodiments, the entire top wall 52 of the reinforcing base 50 is positioned radially outward from the displacement absorbing portion 30 and the protrusion 34 of the lining member 12, but this is not limited thereto, and only a portion of the top wall 52 of the reinforcing base 50 may be positioned at the outermost portion in the radial direction of the spiral tube 102. Also, it is not necessary that at least a portion of the top wall 52 of the reinforcing base 50 is positioned at the outermost portion in the radial direction of the spiral tube 102, and for example, a protrusion that protrudes outward from the upper surface (outer surface) of the top wall 52 of the reinforcing base 50 may be formed on the other main surface 20b of the base 20 of the lining member 12.

In addition, in each of the above-mentioned embodiments, a gap 32 is formed between the base ends of the displacement absorbing parts 30 of the lining member 12, but this gap 32 does not necessarily have to be formed. Also, a thin film part that connects the one main surfaces 20a of the base body 20 to cover the gap 32 may be integrally molded or attached later. Furthermore, the lining member 12 does not necessarily have to have the displacement absorbing part 30, and instead of or together with the displacement absorbing part 30, an anchor part with a T-shaped cross section extending in the longitudinal direction of the base body 20 can be formed on the other main surface 20b of the base body 20.

Furthermore, in the above-mentioned embodiment, the pipe rehabilitation member 10 is used in a push-type pipeline rehabilitation method in which the spiral pipe 102 is rotated while being fed into the existing pipe 100, but this is not limited to this. The pipe rehabilitation member 10 can also be used in a towing-type pipeline rehabilitation method in which the spiral pipe 102, which is manufactured in the starting manhole 110, is pulled from the arrival manhole 112 side by a winch or the like, so that the spiral pipe 102 is fed into the existing pipe 100 without being rotated.

Note that the specific values such as dimensions listed above are merely examples and can be changed as necessary depending on the product specifications, etc.

REFERENCE SIGNS LIST 10 Pipe rehabilitation member 12 Lining member 14 Connecting member 16 Reinforcing member 20 Base of lining member (lining base)
22 ... First fitting portion 34 ... Protrusion 34a ... Claw portion (locking portion)
40 ... Base of connecting member (connecting base)
42: Second fitting portion 50: Reinforcing base 56: Extension portion (retained portion)
100 ... Existing pipe 102 ... Spiral pipe

Claims (7)

A pipe rehabilitation member used in a pipeline rehabilitation method in which a lining member is wound in a spiral shape and adjacent side edge portions of the lining member are connected to form a spiral pipe, and the spiral pipe is fed into an existing pipe,
The lining member and a reinforcing member attached to an outer surface side of the lining member wound in a spiral shape,
The lining member is
a strip-shaped lining base having one main surface that constitutes the inner surface of the helical tube; and a locking portion formed on each of both side portions of the other main surface of the lining base,
The reinforcing member is
a reinforcing base having a groove-shaped reinforcing member that opens toward the lining member side and a band-shaped top wall and a pair of band-shaped side walls extending from both side edges of the top wall; and a locking portion formed on each of the pair of side walls,
The reinforcing member is attached to the lining member so as to straddle and cover the connecting portion of the lining member by engaging the engaged portion with the engaging portion. The pipe rehabilitation member according to claim 1, further comprising a connecting member attached to the outer surface side of the spirally wound lining member to connect adjacent side edges of the lining member. The pipe rehabilitation member according to claim 1 or 2, in which, when the reinforcing member is attached to the spirally wound lining member to form the helical pipe, at least a portion of the top wall of the reinforcing base is located at the outermost part in the radial direction of the helical pipe. The pipe rehabilitation member according to claim 1 or 2, in which, when the reinforcing member is attached to the spirally wound lining member to form the helical pipe, both side surfaces of the connecting portion of the lining member are sandwiched between the pair of side walls of the reinforcing base. The pipe rehabilitation member according to claim 1 or 2, in which, when the reinforcing member is attached to the spirally wound lining member to form the helical pipe, the outer surface of the connecting portion of the lining member is pressed down by the top wall of the reinforcing base. A method for producing a helical pipe in a pipeline rehabilitation method in which a helical pipe is formed and fed into an existing pipe, comprising the steps of:
A method for manufacturing a helical pipe, comprising: (a) a step of spirally winding a lining member and connecting adjacent side edge portions of the lining member; and (b) after step (a), a step of attaching a reinforcing member to an outer surface side of the lining member so as to straddle and cover the connected portions of the lining member. In the step (a), adjacent side edge portions of the lining member are connected to each other using a connecting member;
A method for manufacturing a spiral pipe as described in claim 6, wherein in step (b), the reinforcing member is attached to the lining member so that the reinforcing member straddles and covers the connecting portion of the lining member including the connecting member.

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