JP7355330B2 - Pipe rehabilitation components - Google Patents

Description

The present invention is a pipe rehabilitation member that includes a lining member and a connecting member that connects the side edges of the lining member, and is used in a pipe rehabilitation method in which a spiral pipe is manufactured in a manhole and fed into an existing pipe. Regarding.

An example of a conventional pipe rehabilitation member including a lining member and a connecting member is disclosed in Patent Document 1. In the technique disclosed in Patent Document 1, the lining member (strip-shaped body) includes a strip-shaped substrate and joint recesses formed at both ends thereof. A metal reinforcing member is attached to this lining member. On the other hand, the connecting member (fitting material) includes a joining protrusion that fits into the joining recess of the lining member. When rehabilitating an existing pipe, a spiral pipe is manufactured by winding the lining member in a spiral and connecting the side edges of the lining member with a connecting member using a pipe making machine installed inside the manhole. The spiral pipes produced inside the manhole are then fed into the existing pipes one by one. At this time, the connecting member is attached from the inner surface side of the lining member, and forms the inner surface of the helical tube together with the lining member.

Japanese Patent Application Publication No. 2015-105658

In a tow-type or push-type pipeline rehabilitation method in which a helical pipe manufactured in a manhole is sequentially fed into an existing pipe, as disclosed in Patent Document 1, the axial length of the helical pipe becomes long. Accordingly, the insertion resistance of the spiral tube into the existing pipe increases, so there is a possibility that the spiral tube cannot be properly fed into the existing pipe.

Therefore, the main object of this invention is to provide a new pipe rehabilitation member.

Another object of the present invention is to provide a pipe rehabilitation member that can appropriately feed a spiral pipe produced in a manhole into an existing pipe.

The first invention is a pipe rehabilitation member used in a pipe rehabilitation method in which a lining member is spirally wound inside a manhole to manufacture a spiral pipe, and the spiral pipe is then fed into an existing pipe. member, and a connecting member that is attached from the outer surface side of the spirally wound lining member and connects adjacent side edges of the lining member, and the lining member constitutes the inner surface of the spiral tube. The connecting member includes a strip-shaped lining base having a surface and a first fitting portion formed on each of both sides of the other main surface of the lining base, and the connecting member has a strip-like connecting base and one main face of the connecting base. A second fitting part is formed on the surface and is fitted with the first fitting part, and a protrusion is formed on the other main surface of the connection base and extends in the longitudinal direction of the connection base , and the tip of the protrusion is , a pipe rehabilitation member located outside the outermost part of the lining member in the radial direction of the helical pipe in a state in which the adjacent side edges of the lining member are connected to each other by the connecting member to form a helical pipe.

In the first invention, the pipe rehabilitation member includes a lining member and a connecting member, and is used in a pipe rehabilitation method in which a spiral pipe is manufactured in a manhole and the manufactured spiral pipe is fed into an existing pipe. . The lining member includes a strip-shaped lining base having one main surface constituting the inner surface of the spiral tube, and first fitting portions formed on both sides of the other main surface of the lining base. On the other hand, the connecting member is a member that is attached from the outer surface side of the spirally wound lining member and connects adjacent side edges of the lining member, and is a member that connects a strip-shaped connecting base and a connecting base. On the other hand, the second fitting portion is formed on the main surface and fitted into the first fitting portion. A protrusion extending in the longitudinal direction of the connection base is formed on the other main surface (that is, the surface on the outer surface side when the spiral tube is formed) of the connection base included in the connection member. The tip of this protrusion is located outside the outermost part of the lining member in the radial direction of the helical tube in a state where the adjacent side edges of the lining member are connected to each other by the connecting member to form a helical tube.

According to the first invention, since the connecting member is arranged on the outer surface side of the helical pipe and the protrusion is formed on the other main surface of the connecting base provided in the connecting member, when the helical pipe is fed into the existing pipe, The contact area between the inner surface of the spiral tube and the outer surface of the helical tube is reduced. Thereby, insertion resistance of the helical tube can be reduced, and damage to the helical tube due to sliding contact with an existing tube can also be reduced. Therefore, the helical pipe produced in the manhole can be appropriately fed into the existing pipe. Moreover, since the tip of the protrusion is located outside the outermost part of the lining member, the lining member can be appropriately protected by the connecting member.

The second invention is a pipe rehabilitation member used in a pipe rehabilitation method in which a lining member is spirally wound inside a manhole to manufacture a spiral pipe, and the spiral pipe is fed into an existing pipe, and the lining member is member, and a connecting member that is attached from the outer surface side of the spirally wound lining member and connects adjacent side edges of the lining member, and the lining member constitutes the inner surface of the spiral tube. The connecting member includes a strip-shaped lining base having a surface and a first fitting portion formed on each of both sides of the other main surface of the lining base, and the connecting member has a strip-like connecting base and one main face of the connecting base. a second fitting part formed on the surface and fitted with the first fitting part; and a protrusion formed on the other main surface of the connection base and extending in the longitudinal direction of the connection base, the other main surface of the connection base is a pipe rehabilitation member located outside the outermost part of the lining member in the radial direction of the helical pipe in a state in which the adjacent side edges of the lining member are connected to each other by the connecting member to form a helical pipe.
According to the second invention, similarly to the first invention, it is possible to appropriately feed the spiral pipe formed within the manhole into the existing pipe. Moreover, the lining member can be more reliably protected by the connecting member.

A third invention is dependent on the first or second invention, and the protrusions are formed on both sides of the other main surface of the connecting base.

A fourth invention is dependent on any one of the first to third inventions, and further includes a side protrusion formed on the outer surface in the width direction of the connecting member.

According to the fourth invention, since the side protrusions exert an anchor effect on the filler, the helical tube becomes difficult to detach from the filler, and the fixing strength between the helical tube and the filler is improved. Therefore, the existing pipe and the spiral pipe can be firmly integrated with the filler.

According to this invention, the connecting member is arranged on the outer surface side of the helical pipe, and the protrusion is formed on the other main surface of the connecting base included in the connecting member, so that when the helical pipe is fed into the existing pipe, the inner surface of the existing pipe is The contact area between the outer surface of the helical tube and the outer surface of the helical tube is reduced. Thereby, insertion resistance of the helical tube can be reduced, and damage to the helical tube due to sliding contact with an existing tube can also be reduced. Therefore, the helical pipe produced in the manhole can be appropriately fed into the existing pipe.

The above objects, 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.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustrative view schematically showing how an existing pipe is rehabilitated using a pipe rehabilitation member that is an embodiment of the invention. 2 is an illustrative view showing how a spiral pipe is formed using the pipe rehabilitation member of FIG. 1. FIG. FIG. 2 is a perspective view showing a lining member included in the pipe rehabilitation member of FIG. 1. FIG. FIG. 4 is a sectional view showing the lining member of FIG. 3; It is a perspective view which shows the connection member with which the pipe rehabilitation member of FIG. 1 is equipped. FIG. 6 is a sectional view showing the connecting member of FIG. 5; 6 is a sectional view showing how the side edges of the lining member in FIG. 3 are connected to each other using the connecting member in FIG. 5. FIG. FIG. 6 is a sectional view showing a connecting portion between the lining member of FIG. 3 and the connecting member of FIG. 5; FIG. 2 is a cross-sectional view showing how an existing pipe is rehabilitated with a spiral pipe formed using the pipe rehabilitation member of FIG. 1. FIG.

Referring to FIG. 1, a pipe rehabilitation member 10 which is an embodiment of the present invention is constructed by winding a lining member 12 in a starting side manhole 110 in a spiral shape to form a spiral pipe (lining pipe) 102. It is used in a push-in type pipe rehabilitation method in which the manufactured spiral pipe 102 is sequentially fed into the existing pipe 100. As will be described in detail later, the pipe rehabilitation member 10 includes a lining member 12 and a connecting member 14 that connects side edges of the lining member 12 to each other.

The pipe rehabilitation member 10 can be used to rehabilitate various types of existing pipes 100, such as those made of reinforced concrete, synthetic resin, and metal, and is particularly suitable for pipes 100 of 300 mm in length, in which it is difficult for workers to enter and work. It is suitably used for rehabilitation of sewer pipes having a medium diameter of 1000 mm or less. However, the pipe rehabilitation member 10 can also be used for rehabilitation of an existing pipe 100 having a diameter exceeding 1000 mm.

As shown in FIG. 2, the pipe rehabilitation member 10 is a member for forming a spiral pipe 102, and includes a long strip-shaped lining member 12 and a spirally wound lining member 12 on adjacent sides. It includes a connecting member 14 in the form of a long strip that connects the edges. In this embodiment, the lining member 12 is provided with a fitting portion (first fitting portion 22) with the connecting member 14 on the outer surface side when wound spirally, and the connecting member 14 is wound spirally. It is attached to the lining member 12 from the outer surface side of the wound lining member 12. Note that the outer diameter of the spiral pipe 102 formed using the pipe rehabilitation member 10 is set to be slightly smaller than the inner diameter of the existing pipe 100. The configurations of the lining member 12 and the connecting member 14 will be specifically described below.

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

On each side of the other main surface 20b of the base body 20, that is, on both sides of the outer surface when the lining member 12 is spirally wound, there are first holes that are fitted with second fitting portions 52 of the connecting member 14, which will be described later. A fitting portion 22 is formed. The first fitting portion 22 includes a first engaging portion 24 formed on both side edges of the other main surface 20b of the base body 20, and a first engaging portion 24 formed on the inner side of the first engaging portion 24 in the width direction of the base body 20. It includes an engaging portion 24 and a third engaging portion 26 formed at a predetermined interval.

The first engaging portion 24 is a portion that is engaged with a second engaging portion 54 of the connecting member 14, which will be described later. The first engaging portion 24 has a first protrusion 28 extending in the longitudinal direction of the base body 20. A first locking piece 30 is formed at the tip of one side surface 28a (inner surface in the width direction of the base body 20) of the first protrusion 28. Further, the other side surface 28b of the first protrusion 28 is an inclined surface that slopes inward in the width direction of the base body 20 as the distance from the base body 20 increases.

The third engaging portion 26 is a portion that is engaged with a fourth engaging portion 56 of the connecting member 14, which will be described later. This third engaging portion 26 has a third protrusion 32 extending in the longitudinal direction of the base body 20. A third locking piece 34 is formed at the tip of one side 32a (inner surface in the width direction of the base body 20) of the third protrusion 32. Further, at the tip of the other side surface 32b of the third protrusion 32, an inclined surface is formed that slopes inward in the width direction of the base body 20 as the distance from the base body 20 increases.

Further, a displacement absorbing portion 36 is formed in the center portion of the base body 20 in the width direction, 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. The thickness of the displacement absorbing portion 36 is approximately the same as the thickness of the other portions of the base body 20. The displacement absorbing portion 36 is formed to swell in the width direction as it moves away from the main surface 20a, and includes bent portions 38 formed on both sides in the width direction, and a connecting portion 40 that connects the bent portions 38 to each other. has. The connecting portion 40 is formed to have a smaller curvature than the bent portion 38, and the inner surface 40a of the connecting portion 40 is a flat surface. Further, a gap 42 is formed between the base end portions of the displacement absorbing portion 36. The width of the gap 42 is, for example, 1 mm.

Since the base body 20 has the displacement absorbing portion 36 in this manner, the helical tube 102 formed using the lining member 12 is easily deformed in the axial direction and the bending direction in the portion of the displacement absorbing portion 36. Therefore, when the helical tube 102 is fed into the existing pipe 100 as described later, the displacement absorbing portion 36 is deformed so that the helical tube 102 can follow the bends, bends, and stepped portions of the existing pipe 100. . Further, when an earthquake occurs after construction, the displacement absorbing portion 36 expands and absorbs the axial displacement, so deformation at the connecting portion between the side edges of the lining member 12 is suppressed, and the lining member 12 The fitting between the first fitting part 22 and the second fitting part 52 of the connecting member 14 is maintained appropriately.

Furthermore, since the displacement absorbing portion 36 has the two bent portions 38 and the connecting portion 40 having a smaller curvature than the bent portions 38, the size of the displacement absorbing portion 36 in the height direction (radial direction of the spiral tube 102) can be reduced. The extensible width of the displacement absorbing portion 36 in the width direction (the axial direction of the helical tube 102) can be increased while suppressing the displacement. Further, by providing the gap 42 between the base end portions of the displacement absorbing portion 36, the displacement absorbing portion 36 can also be shrunk in the width direction. Furthermore, since the displacement absorbing portion 36 is formed to expand in the width direction as it moves away from the main surface 20a, the outer surface of the displacement absorbing portion 36 in the width direction can also be used as an anchor for the filler 104 (see FIG. 9). Function.

Such a lining member 12 is integrally molded, for example, by extrusion molding of synthetic resin such as polyethylene resin and hard vinyl chloride resin. The first fitting part 22 including the first engaging part 24 and the third engaging part 26 and the displacement absorbing part 36 are formed over the entire length of the base body 20 in the longitudinal direction. At this time, the lining member 12 is preferably formed of polyolefin resin such as polyethylene resin and polypropylene resin. The lining member 12 in this embodiment is made of high density polyethylene resin.

By forming the lining member 12 from polyolefin resin such as polyethylene resin, it becomes possible to fusion-bond the ends of the lining member 12 in the longitudinal direction, and the strength and smoothness of this joint can be appropriately ensured. . Moreover, since polyolefin resin is flexible, the lining member 12 formed of polyolefin resin can be easily wound into a spiral shape. Therefore, it is possible to appropriately form the helical pipe 102 of a size (that is, a relatively small diameter) corresponding to the existing pipe 100 having a medium diameter of 300 mm or more and 1000 mm or less. Further, the displacement absorbing portion 36 becomes easier to deform, and the spiral pipe 102 becomes easier to follow the displacement during construction, earthquakes, and the like. Furthermore, since polyolefin resin has excellent abrasion resistance and chemical resistance, by forming the lining member 12 that constitutes the inner surface of the helical tube 102 from a polyolefin resin, the abrasion resistance and chemical resistance of the helical tube 102 can be improved. Durability such as durability is also improved.

As shown in FIGS. 5 and 6, the connecting member 14 is a long member for connecting the side edges of the lining member 12. This connecting member 14 is a member that is attached from the outer surface side (the other main surface 20b side) of the lining member 12 as described above, and when the spiral tube 102 is formed using the lining member 12 and the connecting member 14, It is arranged on the outer surface side of the spiral tube 102 and is configured not to be exposed on the inner surface side of the spiral tube 102.

The connecting member 14 includes a band-shaped base (connecting base) 50. The width of the base 50 is, for example, 30 mm, and the thickness of the base 50 is, for example, 3 mm.

One main surface 50a of the base 50 is a surface facing the other main surface 20b of the base 20 of the lining member 12, and a first fitting of the lining member 12 is provided on each of both sides of the one main surface 50a of the base 50. A second fitting portion 52 that fits into the fitting portion 22 is formed. This second fitting part 52 includes a second engaging part 54 and a fourth engaging part 56. The fourth engaging portion 56 is formed on both side edges of one main surface 50a of the base body 50. The second engaging portion 54 is formed inside the fourth engaging portion 56 in the width direction of the base body 50 and spaced apart from the fourth engaging portion 56 by a predetermined distance.

The second engaging portion 54 has a second protrusion 58 extending in the longitudinal direction of the base body 50. A second locking piece 60 that locks the first locking piece 30 of the lining member 12 is formed at the tip of one side 58a (inner side in the width direction of the base body 50) of the second protrusion 58. Ru. On the other hand, the fourth engaging portion 56 has a fourth protrusion 62 extending in the longitudinal direction of the base body 50. A fourth locking piece 64 that locks the third locking piece 34 of the lining member 12 is formed at the tip of one side 62a (inner side in the width direction of the base body 50) of the fourth protrusion 62. Ru.

Further, on one main surface 50a of the base body 50, a water stop portion 66 formed in a band shape from an elastic body such as elastomer is provided between the second engaging portion 54 and the fourth engaging portion 56. When the first fitting portion 22 of the lining member 12 and the second fitting portion 52 of the connecting member 14 are fitted together, this water stop portion 66 connects one principal surface 50a of the base 50 to the third portion of the lining member 12. By being sandwiched between the distal end portion of the engaging portion 26, it is sufficiently compressed (see FIG. 9). This ensures watertightness at the connecting portions of the side edges of the lining member 12.

On the other hand, the other main surface 50b of the base 50 is a surface facing the inner surface of the existing pipe 100, and each side of the other main surface 50b of the base 50 has a semicircular cross section extending in the longitudinal direction of the base 50. A protrusion 68 is formed. This protrusion 68 becomes a part that comes into contact with the inner surface of the existing pipe 100 when the spiral pipe 102 is fed into the existing pipe 100 as described later. By forming the protrusions 68 on both sides of the other main surface 50b of the base body 50, the protrusions 68 contact the inner surface of the existing pipe 100 in a well-balanced manner.

Furthermore, a side protrusion 70 having a rectangular cross section and extending in the longitudinal direction of the base body 50 is formed on each outer side surface in the width direction of the connecting member 14 (in this embodiment, the other side surface 62b of the fourth protrusion 62). This connecting member 14 functions as an anchor portion for the filler 104.

Such a connecting member 14 is integrally molded, for example, by extrusion molding of synthetic resin such as hard vinyl chloride resin and polyethylene resin. The second fitting portion 52 including the second engaging portion 54 and the fourth engaging portion 56, the protrusion 68, and the side protrusion 70 are formed over the entire length of the base body 50 in the longitudinal direction. At this time, the connecting member 14 is preferably formed of a synthetic resin such as hard vinyl chloride resin, which has greater strength than polyolefin resin. The connecting member 14 in this embodiment is made of hard vinyl chloride resin. Note that the water stop portion 66 is provided over the entire length in the longitudinal direction by coextrusion with the connecting member 14.

By forming the connecting member 14 from a hard vinyl chloride resin with high strength, the overall rigidity of the formed spiral tube 102 is improved compared to forming both the lining member 12 and the connecting member 14 from a polyolefin resin. can be done. Further, when the spiral pipe 102 is fed into the existing pipe 100 as described later, the lining member 12 can be appropriately protected by the connecting member 14. Furthermore, since the strength of the second fitting part 52 is increased, it becomes difficult for the first fitting part 22 and the second fitting part 52 to come loose from each other, and the side edges of the lining member 12 can be firmly connected to each other. . Therefore, deformation of this connecting part is suppressed in the event of an earthquake, etc., and the water stop function can be ensured. Furthermore, hard vinyl chloride resin has better moldability than polyolefin resins, makes it easier to obtain the dimensions of the connecting member 14, and allows the side edges of the lining member 12 to be reliably connected to each other. In addition, hard vinyl chloride resin has higher adhesion to water-stopping materials than polyolefin resins.

As shown in FIGS. 7 and 8, when the adjacent side edges of the spirally wound lining member 12 are connected by the connecting member 14, one main surface 20a of the base body 20 of the lining member 12 is The side edges of the base body 20 are brought into contact with each other so that they are flush with each other. Then, by pushing the connecting member 14 from the outer surface side of the spirally wound lining member 12, the second fitting portion 52 of the connecting member 14 is inserted into the first fitting portion 22 of the lining member 12 in the longitudinal direction. Fit them in sequence. Then, the first locking piece 30 and the third locking piece 34 of the first fitting part 22 are respectively locked by the second locking piece 60 and the fourth locking piece 64 of the second fitting part 52. Then, the side edges of the lining member 12 are connected to each other by the connecting member 14.

In this embodiment, when the side edges of the lining member 12 are connected to each other by the connecting member 14, that is, when the spiral tube 102 is formed, the side edges of the base body 20 of the lining member 12 are directly abutted against each other, and the connecting member 14 is not exposed on the inner surface side of the spiral tube 102. Therefore, the number of seams appearing on the inner surface of the helical tube 102 can be reduced, so the inner surface of the helical tube 102 can be made smooth, and the flow performance of the helical tube 102 can be improved. Furthermore, since only the lining member 12 made of polyethylene resin (polyolefin resin) is exposed on the inner surface of the spiral tube 102, the durability such as wear resistance and chemical resistance of the spiral tube 102 is also improved. .

Further, in a state in which the side edges of the lining member 12 are connected to each other by the connecting member 14, the side edges of adjacent base bodies 20 are butted against each other at the connecting portion, and the first locking piece 30 of the lining member 12 is connected to the base body 20. The second locking pieces 60 of the connecting member 14 face each other inward around the side edges of the base body 20 . That is, at the connecting portion between the side edges of the lining member 12, the first engaging portion 24 of the lining member 12 is sandwiched between the second engaging portion 54 of the connecting member 14. Therefore, a force is applied to the lining member 12 in the direction in which the side edges of the adjacent base bodies 20 approach each other (in the direction in which they come into close contact) due to the engagement between the first engaging part 24 and the second engaging part 54. Therefore, the side edges of the base body 20 of the lining member 12 can be fixed in a state in which they are brought into close contact with each other.

Similarly, at the connecting portion between the side edges of the lining member 12, the third locking pieces 34 of the lining member 12 face outward from each other with the side edge of the base body 20 as the center, and the fourth locking piece of the connecting member 14 64 are turned inward toward each other, and the third engaging portion 26 of the lining member 12 is sandwiched between the fourth engaging portion 56 of the connecting member 14. Therefore, in addition to the engagement between the first engagement part 24 and the second engagement part 54, the lining member 12 also has the following effects due to engagement between the third engagement part 26 and the fourth engagement part 56. A force acts in a direction in which the side edges of adjacent base bodies 20 approach each other. Therefore, the side edges of the base body 20 of the lining member 12 can be fixed in a state where they are brought into close contact with each other more appropriately.

Further, as described above, double engagement including the engagement between the first engagement part 24 and the second engagement part 54 and the engagement between the third engagement part 26 and the fourth engagement part 56 Since the side edges of the lining members 12 are connected to each other by this, the resistance force in the tensile direction (the direction in which the lining members 12 are separated from each other) is increased in this connected portion. Therefore, even if axial displacement acts on the helical tube 102 during an earthquake, deformation of the connecting portions (first fitting portion 22 and second fitting portion 52) can be suppressed, and water can be stopped by the water stop portion 66. Functionality can be ensured. Furthermore, since the connection strength is ensured by double engagement, the first engagement portion 24, the second engagement portion 54, the third engagement portion 26, and the fourth engagement portion 56 are connected in order to increase the connection strength. There is no need to increase the wall thickness, and the wall thickness can be made equal to other parts, that is, the entire member can be made to have a uniform thickness, making it easy to mold.

Furthermore, since the other side surface 28b of the first protrusion 28 of the first engaging portion 24 is an inclined surface, when the side edges of the lining member 12 are connected by the connecting member 14, the first protrusion A gap 80 is formed on the other side surface 28b side of the strip 28. When the first engaging part 24 and the second engaging part 54 are engaged, the first engaging part 24 made of polyethylene mainly elastically deforms and tilts toward the other side surface 28b, but the gap 80 exists. Thus, the amount of fall of the first engaging portion 24 is ensured. Therefore, the force (pushing force) required for engagement between the first engaging part 24 and the second engaging part 54 can be reduced, and the connecting member 14 can be easily attached to the lining member 12.

Similarly, when the side edges of the lining member 12 are connected by the connecting member 14, a gap 82 is formed on the other side surface 32b of the third protrusion 32. When the third engaging part 26 and the fourth engaging part 56 are engaged, the third engaging part 26 mainly elastically deforms and tilts toward the other side surface 32b. A margin for the joint portion 26 to fall is ensured. Therefore, the force required for engagement between the third engaging portion 26 and the fourth engaging portion 56 can be reduced, and the connecting member 14 can be easily attached to the lining member 12.

Furthermore, when the side edges of the lining member 12 are connected to each other by the connecting member 14, the tip of the protrusion 68 formed on the base body 50 of the connecting member 14 is the outermost part of the lining member 12 in the radial direction of the spiral tube 102. (in this embodiment, the outer surface of the connecting portion 40 of the displacement absorbing portion 36). Therefore, when the spiral pipe 102 is fed into the existing pipe 100, the protrusion 68 comes into sliding contact with the inner surface of the existing pipe 100, and the lining member 12 does not come into sliding contact (or is difficult to come into sliding contact) with the inner surface of the existing pipe 100, so the connecting member 14 allows the lining member 12 to be properly protected. Furthermore, by forming the protrusion 68 on the other main surface 50b of the base 50 of the connecting member 14, when feeding the spiral pipe 102 into the existing pipe 100, the contact area between the inner surface of the existing pipe 100 and the outer surface of the spiral pipe 102 decreases. Thereby, the insertion resistance of the helical tube 102 can be reduced, and damage to the helical tube 102 due to sliding contact with the existing tube 100 can be reduced. In this embodiment, since the connecting member 14 is made of a hard vinyl chloride resin with high strength, the effect of protecting the lining member 12 and the effect of reducing damage to the helical tube 102 are more appropriately exhibited.

Further, in this embodiment, the other main surface 50b of the base body 50 of the connecting member 14 is also located at the end of the lining member 12 in the radial direction of the spiral tube 102 when the side edges of the lining member 12 are connected by the connecting member 14. Located outside the outside. Therefore, when the spiral pipe 102 is fed into the existing pipe 100, the lining member 12 can be more reliably protected by the connecting member 14.

Next, with reference to FIGS. 1 and 9, an example of a pipe rehabilitation method for rehabilitating an existing pipe 100 using the pipe rehabilitation member 10 as described above will be specifically described. In this embodiment, the existing pipe 100 between the departure side manhole 110 and the destination side manhole 112 is rehabilitated.

When rehabilitating the existing pipe 100, first, the pipe making machine 114 is installed in the starting side manhole 110, and the pipe rehabilitation member 10 including the lining member 12 and the connecting member 14 is installed on the ground near the starting side manhole 110. . It is preferable that the lining member 12 and the connecting member 14 are individually wound into rolls and prepared and installed. Note that the inside of the existing pipe 100 is cleaned in advance using a high-pressure washer or the like.

Next, as shown in FIG. 1, a spiral pipe 102 is constructed within the existing pipe 100. That is, the lining member 12 and the connecting member 14 are supplied from the ground to the pipe making machine 114 installed in the starting side manhole 110, and the spiral pipe 102 formed using this pipe making machine 114 is inserted into the existing pipe from inside the starting side manhole 110. 100 in order. In the pipe making machine 114, the lining member 12 is spirally wound so that the side edges of the base body 20 of the lining member 12 are brought into contact with each other, and the connecting member 14 is attached from the outer surface side of the lining member 12. The spiral pipe 102 is manufactured by connecting the adjacent side edges of the pipes.

Here, when the lining member 12 is spirally wound to form a pipe, the side edges of the base body 20 of the lining member 12 are brought into contact with each other, so that the positioning of the lining member 12 is facilitated, and the pipe production process is facilitated. easy. In addition, the lining member 12 is provided with a fitting portion for the connecting member 14 on the other main surface 20b side (outer surface side) of the base body 20, and the connecting member 14 is attached from the outer surface side of the spirally wound lining member 12. It is possible. For this reason, pipe manufacturing work is difficult with pipe rehabilitation members where connecting members are attached from the inner surface of the lining member.A helical pipe of a size (that is, a relatively small diameter) corresponding to the existing pipe 100 with a medium diameter of 300 mm or more and 1000 mm or less Even if it is 102, it is easy to make a pipe. Moreover, since the spiral tube 102 is formed using two members, the lining member 12 and the connecting member 14, after the lining member 12 is rotated and positioned, the side edges of the lining member 12 are connected and fixed by the connecting member 14. can do. Therefore, when forming the helical tube 102, it is easy to match the circumferential lengths (diameters) of adjacent lining members 12, and the helical tube 102 can be formed with a uniform diameter over the entire length in the axial direction.

The helical pipe 102 produced by the pipe making machine 114 is extruded from the pipe making machine 114 in order from the produced part, and is sent into the existing pipe 100 toward the reaching side manhole 112 while rotating. At this time, since the connecting member 14 is arranged on the outer surface side of the spiral pipe 102 and the protrusion 68 is formed on the other main surface 50b of the base 50 of the connecting member 14, the inner surface of the existing pipe 100 and the spiral pipe 102 The contact area with the outer surface of the Thereby, insertion resistance of the helical tube 102 can be reduced, and damage to the helical tube 102 due to sliding contact with the existing tube 100 can also be reduced. Therefore, the spiral pipe 102 can be appropriately fed into the existing pipe 100. Further, since the tip of the protrusion 68 is located outside the outermost part of the lining member 12, the lining member 12 can be appropriately protected by the connecting member 14.

After constructing the helical pipe 102 over the entire length of the rehabilitation section of the existing pipe 100, a filler 104 is then injected between the inner surface of the existing pipe 100 and the outer surface of the helical pipe 102. By solidifying the filler 104, a rehabilitated pipe (composite pipe) 106 is formed in which the existing pipe 100 and the spiral pipe 102 are integrated, as shown in FIG. Thereafter, the rehabilitation work for the existing pipe 100 is completed by carrying out cleaning work and the like as appropriate.

When forming the rehabilitated pipe 106, the side protrusions 70 of the connecting member 14 and the displacement absorbing portion 36 of the lining member 12 exert an anchor effect, making it difficult for the helical pipe 102 to come off from the filler 104. The fixing strength between the filler 104 and the filler 104 is improved. Therefore, the existing pipe 100 and the spiral pipe 102 can be firmly integrated by the filler 104.

As described above, according to this embodiment, the connecting member 14 is arranged on the outer surface side of the helical tube 102, and the protrusion is formed on the other main surface 50b of the base body 50 included in the connecting member 14, so that the helical tube 102 When feeding into the existing pipe 100, the contact area between the inner surface of the existing pipe 100 and the outer surface of the helical pipe 102 is reduced. Thereby, the insertion resistance of the helical tube 102 can be reduced, and damage to the helical tube 102 due to sliding contact with the existing tube 100 can be reduced. Therefore, the spiral pipe 102 produced within the starting-side manhole 110 can be appropriately fed into the existing pipe 100.

Further, since the tip of the protrusion 68 is located outside the outermost part of the lining member 12, the lining member 12 can be appropriately protected by the connecting member 14. Further, since the other main surface 50b of the base body 50 is located outside the outermost part of the lining member 12, the lining member 12 can be more reliably protected by the connecting member 14.

Furthermore, since the lining member 12 is made of flexible polyethylene resin (polyolefin resin), it is easy to wind the lining member 12 in a spiral shape, and the spiral pipe 102 of a size corresponding to the existing pipe 100 of medium diameter can be appropriately wound. can be formed into Furthermore, since the connecting member 14 is made of a hard vinyl chloride resin with high strength, the rigidity of the entire spiral tube 102 can be improved, and the effect of protecting the lining member 12 and the effect of reducing damage to the spiral tube 102 is more appropriate. It is demonstrated.

Note that the specific configuration or shape of the pipe rehabilitation member 10 (lining member 12 and connecting member 14) described above may be such that the connecting member 14 can be attached from the outer surface side of the lining member 12, and can be changed as appropriate. be.

For example, in the above embodiment, the lining member 12 has two engaging parts (the first engaging part 24 and the third engaging part 26) as the fitting part (first fitting part 22) with the connecting member 14. ), but the number of engaging portions may be one. Similarly, the connecting member 14 has two engaging parts (the second engaging part 54 and the fourth engaging part 56) as the fitting part (second fitting part 52) with the lining member 12; There may be only one engaging portion. Further, among the fitting parts formed on the lining member 12 and the connecting member 14, one fitting part can be formed in the shape of a groove, and the other fitting part can be formed in the shape of a protrusion that is fitted into the fitting part.

Further, in the above embodiment, the connecting member 14 has two protrusions 68 formed on both sides of the base body 50, but the number of protrusions 68 may be one or three or more. For example, if one protrusion 68 is provided, it may be provided at the center in the width direction of the other main surface 50b of the base 50, and if three protrusions 68 are provided, it may be provided on the other main surface 50b of the base 50. It may be provided at the center in the width direction and at both sides.

Further, in the above embodiment, the gap 42 is formed between the base end portions of the displacement absorbing portions 36 of the lining member 12, but this gap 42 does not necessarily need to be formed. Further, a thin film portion connecting the one main surfaces 20a of the base body 20 to each other so as to cover the gap 42 may be integrally molded, or may be provided by attaching the thin film portion later.

Furthermore, although not provided in the embodiments described above, a reinforcing member may be attached to the outer surface side (the other main surface 20b side) of the lining member 12 in order to increase the rigidity.

Furthermore, in the above-described embodiment, the pipe rehabilitation member 10 is used in a push-in type pipe rehabilitation method in which the spiral pipe 102 is fed into the existing pipe 100 while being rotated, but the present invention is not limited to this. The pipe rehabilitation member 10 is a tow-type pipe that is fed into the existing pipe 100 without rotating the helical pipe 102 by pulling the helical pipe 102 manufactured in the starting side manhole 110 from the arrival side manhole 112 side with a winch or the like. It can also be used in road rehabilitation methods.

Further, in the above-described embodiment, a composite pipe (rehabilitated pipe 106) is formed by integrating the existing pipe 100 and the spiral pipe 102 with the filler 104, but the present invention is not limited thereto. The pipe rehabilitation member 10 can also form a self-supporting pipe that maintains its strength independently from the existing pipe 100.

Note that the specific numerical values such as the dimensions listed above are merely examples, and can be changed as appropriate depending on the needs of product specifications and the like.

10... Pipe rehabilitation member 12... Lining member 14... Connection member 20... Base of lining member (lining base)
22...First fitting part 50...Base of connecting member (connecting base)
52...Second fitting part 68...Protrusion 70...Side protrusion 100...Existing pipe 102...Spiral pipe 104...Filler 106...Rehabilitated pipe

Claims (4)

A pipe rehabilitation member used in a pipe rehabilitation method in which a lining member is spirally wound inside a manhole to manufacture a spiral pipe, and the spiral pipe is fed into an existing pipe, the pipe rehabilitation member comprising:
The lining member includes a connecting member that is attached from the outer surface of the spirally wound lining member and connects adjacent side edges of the lining member,
The lining member is
a strip-shaped lining base having one main surface constituting the inner surface of the spiral tube; and a first fitting part formed on each of both sides of the other main surface of the lining base,
The connecting member is
A strip-shaped connecting base,
a second fitting part formed on one main surface of the connection base and fitted with the first fitting part; and a protrusion formed on the other main surface of the connection base and extending in the longitudinal direction of the connection base. Prepare,
The tip of the protrusion is located outside the outermost part of the lining member in the radial direction of the helical tube when the helical tube is formed by connecting adjacent side edges of the lining member by the connecting member. Pipe rehabilitation components located in A pipe rehabilitation member used in a pipe rehabilitation method in which a lining member is spirally wound inside a manhole to manufacture a spiral pipe, and the spiral pipe is fed into an existing pipe, the pipe rehabilitation member comprising:
The lining member includes a connecting member that is attached from the outer surface of the spirally wound lining member and connects adjacent side edges of the lining member,
The lining member is
a strip-shaped lining base having one main surface constituting the inner surface of the spiral tube; and a first fitting part formed on each of both sides of the other main surface of the lining base,
The connecting member is
A strip-shaped connecting base,
a second fitting part formed on one main surface of the connection base and fitted with the first fitting part; and a protrusion formed on the other main surface of the connection base and extending in the longitudinal direction of the connection base. Prepare,
The other main surface of the connecting base is formed from the outermost side of the lining member in the radial direction of the spiral tube in a state in which the adjacent side edges of the lining member are connected by the connecting member to form the spiral tube. Pipe rehabilitation components also located on the outside . The pipe rehabilitation member according to claim 1 or 2 , wherein the protrusions are formed on both sides of the other main surface of the connection base. The pipe rehabilitation member according to any one of claims 1 to 3 , further comprising a side protrusion formed on the outer side surface in the width direction of the connecting member.

Images