JP7290252B2 - Pipe rehabilitation member - Google Patents

Description

The present invention includes a lining member and a connecting member that connects the side edges of the lining member, and is used in a pipeline 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 is disclosed in Patent Document 1. In the technique of Patent Document 1, a pipe rehabilitation member is composed of a lining member (strip member) and a connecting member (connecting member). When rehabilitating an existing pipe, the lining member is spirally wound along the inner surface of the existing pipe, and adjacent side edges of the spirally wound lining member are connected by a connecting member to form a spiral pipe. By forming, a spiral pipe (lining pipe) is constructed in the existing pipe. When the lining member is spirally wound, a gap corresponding to the fitting margin of the connecting member is provided between adjacent side edges of the lining member. The connecting member is attached from the inner surface side of the lining member and constitutes the inner surface of the helical tube together with the lining member.

Japanese Patent No. 6559920

In the technique of Patent Document 1, it is necessary to provide a gap of a predetermined size between the adjacent side edges of the lining member, so there is the problem that it is difficult to position the lining member when it is spirally wound.

SUMMARY OF THE INVENTION Therefore, a primary object of the present invention is to provide a novel pipe rehabilitation member.

Another object of the present invention is to provide a pipe rehabilitation member that facilitates the production of a helical pipe.

A first invention is a pipe rehabilitation member used in a pipeline rehabilitation method in which a lining member is spirally wound in a manhole to manufacture a spiral pipe, and the spiral pipe is fed into an existing pipe, the lining comprising: 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. A strip plate-shaped lining base having a surface and first engaging portions formed on both sides of the other main surface of the lining base, and the connecting member is formed on the strip plate-shaped connecting base and the connecting base. and a second engaging portion engaged with each of the first engaging portions. The second engaging portion includes a second protrusion extending in the longitudinal direction of the connecting base, and a second protrusion formed on one side surface of the second protrusion and configured to be the first locking piece. In a state in which the adjacent side edges of the lining member are connected by the connecting member, the side edges of the adjacent lining base bodies are abutted against each other at the connecting portion. The pipe rehabilitation members are such that one locking piece faces outward from the side edge of the lining base, and the second locking piece faces inward from the side edge of the lining base.

In the first invention, the pipe rehabilitation member includes a lining member and a connecting member, and is used in a pipeline rehabilitation method in which a spiral pipe is produced in a manhole and the produced spiral pipe is fed into an existing pipe. . The lining member includes a strip-shaped lining base having one main surface forming the inner surface of the helical tube, and first engaging 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 the adjacent side edges of the lining member. A second engaging portion is formed and engaged with each of the first engaging portions. The first engaging portion has a first ridge extending in the longitudinal direction of the lining base and a first locking piece formed on one side surface of the first ridge, and the second engaging portion has a connecting base. and a second locking piece engaged with the first locking piece. In a state in which the adjacent side edges of the lining member are connected by the connecting member, the side edges of the adjacent lining base bodies are butted against each other at the connecting portion, and the side edges of the lining base bodies are centered on the first engagement. The stop pieces face outward and the second locking pieces face inward. That is, at the connecting portion between the side edges of the lining member, the first engaging portion of the lining member is sandwiched by the second engaging portion of the connecting member, and the lining member has the first engaging portion and the second engaging portion. Engagement with the abutment causes the side edges of the adjacent lining substrates to approach each other.

According to the first invention, since the side edges of the lining base are abutted against each other, the lining member can be easily positioned when forming the spiral tube, and the spiral tube can be easily manufactured. Further, at the connecting portion between the side edges of the lining members, the first locking pieces of the lining member are directed outward and the second locking pieces of the connecting member are directed inward with respect to the side edge of the lining base body. As a result, a force acts in a direction in which the side edges of the adjacent lining base bodies approach each other, and the side edges of the lining base bodies can be properly fixed in a state of being brought into close contact with each other.

A second invention is according to the first invention, in which a gap is formed on the other side surface of the first protrusion in a state in which the adjacent side edges of the lining member are connected by the connecting member.

According to the second aspect of the invention, since the tilting margin of the first engaging portion is ensured, the force required for engaging the first engaging portion and the second engaging portion can be reduced, and the connecting member is connected to the lining member. Easier to install parts.

A third invention is according to the first or second invention, wherein the lining member is formed on one side surface side of the first protrusion with a predetermined spacing from each of the first engagement portions. The connecting member is formed on the other side surface of the second protrusion with a predetermined gap from each of the second engaging portions, and is engaged with each of the third engaging portions. The third engagement portion has a third protrusion extending in the longitudinal direction of the lining base and a third locking piece formed on one side surface of the third protrusion. The portion has a fourth ridge extending in the longitudinal direction of the connecting base, and a fourth locking piece formed on one side surface of the fourth ridge and engaged with the third locking piece. When the adjacent side edges of the lining member are connected to each other, the third locking pieces are directed outward from the side edges of the lining base, and the fourth locking pieces are facing the side edges of the lining base. centered on each other.

According to the third invention, the side edges of the lining substrate can be fixed in a state of being brought into close contact with each other more appropriately. Further, the side edges of the lining member are engaged with each other by the double engagement including the engagement between the first engagement portion and the second engagement portion and the engagement between the third engagement portion and the fourth engagement portion. , the resistance to the tensile direction increases at this connecting portion. Therefore, even if the helical tube is displaced in the axial direction due to an earthquake or the like, deformation of the connecting portion is suppressed, and the water stopping function of the connecting portion can be maintained.

A fourth invention is according to the third invention, in which a gap is formed on the other side surface of the third ridge in a state in which the adjacent side edges of the lining member are connected by the connecting member.

According to the fourth invention, since the tilting margin of the third engaging portion is ensured, the force required for engaging the third engaging portion and the fourth engaging portion can be reduced, and the connecting member is connected to the lining member. Easier to install parts.

A fifth invention is according to any one of the first to fourth inventions, wherein the lining member is made of resin softer than the connecting member.

According to the fifth aspect of the invention, since the lining member is made of a resin softer than the connecting member, when the lining member is spirally wound, problems such as cracks in the lining member are less likely to occur. A helical tube with a size corresponding to can be appropriately formed.

According to this invention, since the side edges of the lining base are abutted against each other, the lining member can be easily positioned when forming the spiral tube, and the spiral tube can be easily manufactured. Further, at the connecting portion between the side edges of the lining members, the first locking pieces of the lining member are directed outward and the second locking pieces of the connecting member are directed inward with respect to the side edge of the lining base body. As a result, a force acts in a direction in which the side edges of the adjacent lining base bodies approach each other, and the side edges of the lining base bodies can be properly fixed in a state of being brought into close contact with each other.

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

1 is an illustrative view schematically showing how an existing pipe is rehabilitated using a pipe rehabilitating member according to an embodiment of the present invention; FIG. FIG. 2 is an illustrative view showing how the pipe rehabilitation member of FIG. 1 is used to form a helical pipe; FIG. 2 is a perspective view showing a lining member included in the pipe rehabilitation member of FIG. 1; 4 is a cross-sectional view showing the lining member of FIG. 3; FIG. 1. It is a perspective view which shows the connection member with which the pipe|tube rehabilitation member of FIG. 1 is provided. FIG. 6 is a cross-sectional view showing the connecting member of FIG. 5; FIG. 6 is a cross-sectional view showing how the side edges of the lining member of FIG. 3 are connected using the connecting member of FIG. 5 ; 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 helical pipe formed using the pipe rehabilitating member of FIG. 1 ;

Referring to FIG. 1, a pipe rehabilitation member 10 according to one embodiment of the present invention spirally winds a lining member 12 in a manhole 110 on the starting side to produce a spiral pipe (lining pipe) 102, It is used for a pipe line rehabilitation construction method of a root pushing type in which the manufactured spiral pipe 102 is sequentially fed into the existing pipe 100 . As will be described later in detail, this pipe rehabilitation member 10 is composed of a lining member 12 and a connecting member 14 that connects the side edges of the lining member 12 .

The pipe rehabilitation member 10 can be used to rehabilitate various existing pipes 100 made of reinforced concrete, synthetic resin and metal. 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 helical pipe 102, and consists of a long band plate-shaped lining member 12 and a spirally wound lining member 12 on the adjacent side. and a long band plate-shaped connecting member 14 that connects the edges. In this embodiment, the lining member 12 has a fitting portion (first fitting portion 22) with the connecting member 14 on the outer surface side when the lining member 12 is spirally wound. It is attached to the lining member 12 from the outer surface side of the wound lining member 12 . The outer diameter of the helical 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 a long member that is a main component of the helical tube 102 and includes a strip-shaped base (lining base) 20 . One main surface 20a of the base 20 is a surface forming the inner surface of the helical tube 102 and is a smooth surface. The width of the substrate 20 is, for example, 75 mm, and the thickness (thickness) of the substrate 20 is, for example, 3 mm.

On the side of the other main surface 20b of the base body 20, that is, on both sides of the outer surface side when the lining member 12 is spirally wound, there are first coupling members 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 first engaging portions 24 formed on both side edge portions of the other main surface 20b of the base 20, and a first engaging portion 24 formed inside the first engaging portion 24 in the width direction of the base 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 engages with a second engaging portion 54 of the connecting member 14, which will be described later. This first engaging portion 24 has a first ridge 28 extending in the longitudinal direction of the base 20 . A first locking piece 30 is formed at the tip of one side surface 28a of the first projection 28 (the inner surface in the width direction of the base 20). The other side surface 28b of the first ridge 28 is an inclined surface that inclines inward in the width direction of the base 20 as the distance from the base 20 increases.

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

In addition, a displacement absorbing portion 36 is formed in the center portion of the base 20 in the width direction by slackening a portion of the base 20 in the width direction so as to protrude toward the other main surface 20b. The thickness of the displacement absorbing portion 36 is substantially the same as the thickness of other portions of the base 20 . The displacement absorbing portion 36 is formed so as to swell in the width direction with increasing distance from the main surface 20a. have 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. A gap 42 is formed between the proximal ends of the displacement absorbing portions 36 . The width of the gap 42 is, for example, 1 mm.

Since the base body 20 has the displacement absorbing portions 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 at the displacement absorbing portions 36 . Therefore, when the helical pipe 102 is fed into the existing pipe 100 as will be described later, the deformation of the displacement absorbing portion 36 allows the helical pipe 102 to follow the bends, bends and steps of the existing pipe 100 . . Further, when an earthquake occurs after construction, the displacement absorbing portion 36 expands and absorbs the axial displacement, so that the deformation at the connection portion between the side edges of the lining member 12 is suppressed, and the lining member 12 is prevented from being deformed. The fitting between the first fitting portion 22 and the second fitting portion 52 of the connecting member 14 is properly maintained.

Further, since the displacement absorbing portion 36 has the two bent portions 38 and the connecting portion 40 having a smaller curvature than the bent portion 38, the size of the displacement absorbing portion 36 in the height direction (radial direction of the helical tube 102) can be reduced. It is possible to increase the extendable width in the width direction (the axial direction of the helical tube 102) of the displacement absorbing portion 36 while suppressing it. Furthermore, by providing the gap 42 between the proximal ends of the displacement absorbing portions 36, the displacement absorbing portions 36 can be contracted in the width direction. Furthermore, since the displacement absorbing portion 36 is formed so as to swell in the width direction as it separates from the main surface 20a, the width direction outer surface of the displacement absorbing portion 36 can also serve as an anchor portion 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 rigid vinyl chloride resin. The first fitting portion 22 including the first engaging portion 24 and the third engaging portion 26 and the displacement absorbing portion 36 are formed over the entire length of the base 20 in the longitudinal direction. In this case, the lining member 12 is preferably made of polyolefin resin such as polyethylene resin and polypropylene resin. The lining member 12 of this embodiment is made of high density polyethylene resin.

By forming the lining member 12 from a polyolefin resin such as polyethylene resin, it becomes possible to fusion-bond the ends of the lining member 12 in the longitudinal direction, thereby appropriately ensuring the strength and smoothness of this joint. . In addition, since polyolefin resin is more flexible than rigid vinyl chloride resin or the like, the lining member 12 made of polyolefin resin can be easily wound spirally. Therefore, the helical pipe 102 having a size corresponding to the existing pipe 100 having a middle diameter of 300 mm or more and 1000 mm or less (that is, a relatively small diameter) can be appropriately formed. Furthermore, the displacement absorbing portion 36 is easily deformed, so that the helical tube 102 can easily follow the displacement during construction, earthquakes, and the like. Furthermore, polyolefin resin is excellent in wear resistance and chemical resistance. Durability such as chemical resistance is also improved.

As shown in FIGS. 5 and 6, the connecting member 14 is an elongated member for connecting side edges of the lining member 12 together. 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. It is configured so as not to be exposed on the inner surface side of the helical tube 102 .

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

The one main surface 50a of the base body 50 is a surface facing the other main surface 20b of the base body 20 of the lining member 12. On both sides of the one main surface 50a of the base body 50, the lining member 12 is first fitted. A second fitting portion 52 to be fitted with the fitting portion 22 is formed. The second fitting portion 52 includes a second engaging portion 54 and a fourth engaging portion 56 . The fourth engaging portions 56 are formed on both side edges of the one main surface 50 a of the base 50 . The second engaging portion 54 is formed inside the fourth engaging portion 56 in the width direction of the base 50 with a predetermined gap therebetween.

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

Also, on one main surface 50 a of the base 50 , a water stop portion 66 is provided between the second engaging portion 54 and the fourth engaging portion 56 and is formed in a belt shape from an elastic body such as an elastomer. The water stop portion 66 forms a gap between the one main surface 50a of the base 50 and the third portion of the lining member 12 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. It is sufficiently compressed by being sandwiched between it and the tip of the engaging portion 26 (see FIG. 9). As a result, watertightness is ensured at the connecting portion between 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 on both sides of the other main surface 50b of the base 50, there are formed semicircular cross-section extending in the longitudinal direction of the base 50, respectively. are formed. The ridges 68 are portions that come into contact with the inner surface of the existing pipe 100 when the helical pipe 102 is fed into the existing pipe 100 as will be described later.

A side projection 70 extending in the longitudinal direction of the base 50 and having a rectangular cross section is formed on each of the widthwise outer surfaces of the connecting member 14 (the other side 62b of the fourth projection 62 in this embodiment). This connecting member 14 functions as an anchor for the filler 104 .

Such connecting member 14 is integrally formed by extrusion molding of synthetic resin such as rigid vinyl chloride resin and polyethylene resin. The second fitting portion 52 including the second engaging portion 54 and the fourth engaging portion 56, the ridges 68, and the side ridges 70 are formed over the entire length of the base 50 in the longitudinal direction. At this time, it is preferable that the connecting member 14 is made of a synthetic resin such as a rigid vinyl chloride resin having a higher strength than that of a polyolefin resin. The connecting member 14 of this embodiment is made of rigid vinyl chloride resin. The water stop portion 66 is provided over the entire length in the longitudinal direction by being co-extruded with the connecting member 14 .

By forming the connecting member 14 from hard vinyl chloride resin having a high strength, compared to forming both the lining member 12 and the connecting member 14 from polyolefin resin, the rigidity of the entire helical tube 102 formed is improved. can be made In addition, the lining member 12 can be appropriately protected by the connecting member 14 when the helical pipe 102 is fed into the existing pipe 100 as will be described later. Furthermore, since the strength of the second fitting portion 52 is also increased, the fitting between the first fitting portion 22 and the second fitting portion 52 becomes difficult to come off, and the side edges of the lining member 12 can be firmly connected. . Therefore, deformation of the connecting portion is suppressed in the event of an earthquake or the like, and a water stopping function can be ensured. Furthermore, the rigid vinyl chloride resin has better moldability than the polyolefin resin, so that the connecting member 14 can be easily dimensioned, and the side edges of the lining member 12 can be reliably connected to each other. In addition, rigid vinyl chloride resins have higher adhesion to water stop materials than polyolefin resins.

As shown in FIGS. 7 and 8, when the adjacent side edge portions of the spirally wound lining member 12 are connected by the connecting member 14, the main surfaces 20a of the base body 20 of the lining member 12 are aligned with each other. The side edges of the substrate 20 are butted against 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 moved to the first fitting portion 22 of the lining member 12 in the longitudinal direction. are fitted in order. Then, the first locking piece 30 and the third locking piece 34 of the first fitting portion 22 are locked by the second locking piece 60 and the fourth locking piece 64 of the second fitting portion 52, respectively. The side edges of the lining member 12 are connected by the connecting member 14 .

In this embodiment, when the side edges of the lining member 12 are connected by the connecting member 14, that is, when the helical 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 helical tube 102 . Therefore, since the number of seams appearing on the inner surface of the spiral tube 102 can be reduced, the inner surface of the spiral tube 102 can be made smooth, and the flow-down performance of the spiral tube 102 can be improved. In addition, since only the lining member 12 made of polyethylene resin (polyolefin resin) is exposed on the inner surface of the spiral tube 102, durability such as abrasion 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 by the connecting member 14, the side edges of the adjacent bases 20 are butted against each other at the connecting portion, and the first locking pieces 30 of the lining member 12 are connected to the base 20. , and the second locking pieces 60 of the connecting member 14 are directed inward with the side edge of the base 20 as the center. That is, the first engaging portion 24 of the lining member 12 is sandwiched between the second engaging portions 54 of the connecting member 14 at the connecting portion between the side edges of the lining member 12 . Therefore, due to the engagement between the first engaging portion 24 and the second engaging portion 54, a force acts on the lining member 12 in the direction in which the side edges of the adjacent substrates 20 approach each other (the direction in which they come into close contact). Therefore, the lining member 12 can be fixed with the side edges of the base body 20 of the lining member 12 being properly 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 are directed outward from the side edges of the base body 20, and the fourth locking pieces of the connecting member 14 are aligned. 64 face inward, and the fourth engaging portion 56 of the connecting member 14 sandwiches the third engaging portion 26 of the lining member 12 . Therefore, in the lining member 12, in addition to the engagement between the first engagement portion 24 and the second engagement portion 54, the engagement between the third engagement portion 26 and the fourth engagement portion 56 also causes A force acts in a direction in which side edges of adjacent substrates 20 approach each other. Therefore, the side edges of the base body 20 of the lining member 12 can be fixed in a state of being more appropriately brought into close contact with each other.

Further, as described above, double engagement including engagement between the first engagement portion 24 and the second engagement portion 54 and engagement between the third engagement portion 26 and the fourth engagement portion 56 is possible. Since the side edges of the lining members 12 are connected by , the resistance to the tensile direction (the direction in which the lining members 12 separate from each other) increases at this connecting portion. Therefore, even if the helical tube 102 is displaced in the axial direction due to an earthquake or the like, deformation of the connection portion (the first fitting portion 22 and the second fitting portion 52) can be suppressed, and the water shutoff portion 66 can stop water. function can be ensured. Further, since the connection strength is ensured by the double engagement, the first engagement portion 24, the second engagement portion 54, the third engagement portion 26 and the fourth engagement portion 56 are arranged in order to increase the connection strength. There is no need to increase the thickness, and the thickness can be made uniform with other parts, that is, the thickness of the entire member can be made uniform, which facilitates molding.

Furthermore, since the other side surface 28b of the first protrusion 28 of the first engaging portion 24 is an inclined surface, in a state where the side edges of the lining member 12 are connected by the connecting member 14, the first protrusion 28b is inclined. A gap 80 is formed on the side of the other side surface 28 b of the line 28 . When the first engaging portion 24 and the second engaging portion 54 are engaged with each other, the first engaging portion 24 made of polyethylene is mainly elastically deformed toward the other side surface 28b and tilted. The tilt margin of the first engaging portion 24 is ensured by . Therefore, the force (pushing force) required for engagement between the first engaging portion 24 and the second engaging portion 54 can be reduced, making it easier to attach the connecting member 14 to the lining member 12 .

Similarly, in a state where the side edges of the lining member 12 are connected by the connecting member 14, a gap 82 is formed on the side of the other side surface 32b of the third ridge 32. As shown in FIG. When the third engaging portion 26 and the fourth engaging portion 56 are engaged with each other, the third engaging portion 26 is mainly elastically deformed and tilted toward the other side surface 32b. The collapsing margin of the joining portion 26 is ensured. Therefore, the force required for engaging the third engaging portion 26 and the fourth engaging portion 56 can be reduced, making it easier to attach the connecting member 14 to the lining member 12 .

Furthermore, in a state where the side edges of the lining member 12 are connected by the connecting member 14 , the tip of the projection 68 formed on the base 50 of the connecting member 14 is the outermost portion of the lining member 12 in the radial direction of the spiral tube 102 . It is located outside (in this embodiment, the outer surface of the connecting portion 40 of the displacement absorbing portion 36). Therefore, when the helical pipe 102 is fed into the existing pipe 100, the ridge 68 is in sliding contact with the inner surface of the existing pipe 100, and the lining member 12 is not in sliding contact with the inner surface of the existing pipe 100 (or is less likely to be in sliding contact). 14 allows the lining member 12 to be adequately protected. Further, by forming the protrusion 68 on the other main surface 50b of the base 50 of the connecting member 14, when the helical tube 102 is fed 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. decreases. As a result, 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 pipe 100 can be reduced. In this embodiment, since the connecting member 14 is made of hard vinyl chloride resin having a high strength, the effect of protecting the lining member 12 and the effect of reducing damage to the helical tube 102 are exhibited more appropriately.

In this embodiment, the other main surface 50b of the base 50 of the connecting member 14 is also the maximum of the lining member 12 in the radial direction of the helical tube 102 in a state where the side edges of the lining member 12 are connected by the connecting member 14. Located outside than outside. Therefore, when the helical 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 pipeline 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 manhole 110 on the departure side and the manhole 112 on the arrival side is to be rehabilitated.

When rehabilitating an existing pipe 100, first, a pipe making machine 114 is installed in a manhole 110 on the starting side, and a pipe rehabilitation member 10 including a lining member 12 and a connecting member 14 is installed on the ground in the vicinity of the manhole 110 on the starting side. . The lining member 12 and the connecting member 14 may be individually wound into rolls 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 helical pipe 102 is constructed inside 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 helical pipe 102 formed using this pipe making machine 114 is inserted into the existing pipe from inside the starting side manhole 110. 100 will be sent in sequence. 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 butted against each other, and the connecting member 14 is attached from the outer surface side of the lining member 12. The helical tube 102 is manufactured by connecting the adjacent side edges of the . The helical pipe 102 manufactured by the pipe-making machine 114 is pushed out from the pipe-making machine 114 in order from the pipe-manufactured portion, and fed into the existing pipe 100 toward the reach-side manhole 112 while rotating.

Here, when the lining member 12 is spirally wound to produce a pipe, the side edges of the base body 20 of the lining member 12 are butted against each other. easy. Also, the lining member 12 has a fitting portion with 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, a helical pipe having 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, which is difficult to manufacture with a pipe rehabilitation member to which a connecting member is attached from the inner surface side of the lining member. Even with 102, pipe production is easy. In addition, since the helical 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 peripheral length (aperture) of the adjacent lining members 12, and the helical tube 102 having a uniform aperture over the entire length in the axial direction can be formed.

After constructing the helical pipe 102 over the entire length of the rehabilitation section of the existing pipe 100 , a filling material 104 is subsequently 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 in which the existing pipe 100 and the helical pipe 102 are integrated as shown in FIG. 9 is formed. After that, the rehabilitation work for the existing pipe 100 is completed by appropriately performing clean-up work and the like.

When forming the rehabilitating pipe 106 , the side projections 70 of the connecting member 14 and the displacement absorbing portion 36 of the lining member 12 exhibit an anchor effect, so that the helical pipe 102 is difficult to come off from the filler 104 . and the fixing strength of the filler 104 is improved. Therefore, the existing pipe 100 and the helical pipe 102 can be firmly integrated by the filler 104 .

As described above, according to this embodiment, the side edges of the base body 20 of the lining member 12 are abutted against each other, so that the lining member 12 can be easily positioned when forming the spiral tube 102. Easy to manage. Further, at the connecting portion between the side edges of the lining member 12, the first locking pieces 30 of the lining member 12 are directed outward with respect to the side edge of the base body 20, and the second locking pieces 60 of the connecting member 14 are aligned. are directed inward, a force acts in a direction in which the side edges of the adjacent bases 20 approach each other, and the side edges of the bases 20 of the lining member 12 can be properly fixed in a state of being in close contact with each other.

Further, the double engagement including the engagement between the first engagement portion 24 and the second engagement portion 54 and the engagement between the third engagement portion 26 and the fourth engagement portion 56 allows the lining member 12 to Since the side edges of the lining base body 20 are connected to each other, the side edges of the lining base body 20 can be fixed in a state of being more appropriately brought into close contact with each other. Therefore, even if the helical tube 102 is displaced in the axial direction due to an earthquake or the like, the deformation of the connecting portion is suppressed, and the water stopping function of the connecting portion can be maintained.

Furthermore, the lining member 12 has a fitting portion with the connecting member 14 on its outer surface side, and the connecting member 14 can be attached to the lining member 12 from the outer surface side of the lining member 12, so the length is 300 mm or more and 1000 mm or less. Even the helical pipe 102 having a size corresponding to the existing pipe 100 having a medium diameter of 100 mm can be easily manufactured. Therefore, the pipe rehabilitation member 10 can appropriately cope with rehabilitation of the existing medium-diameter pipe 100 .

In addition, since the helical tube 102 is formed using two members, the lining member 12 and the connecting member 14, it is easy to match the circumferential lengths of the adjacent lining members 12, and the helical tube has a uniform diameter over the entire length in the axial direction. 102 can be formed.

Furthermore, since the lining member 12 is made of flexible polyethylene resin (polyolefin resin), the lining member 12 can be easily spirally wound, and the helical pipe 102 having a size corresponding to the existing medium-diameter pipe 100 can be appropriately used. can be formed to In addition, since the connecting member 14 is made of hard vinyl chloride resin having a high strength, the rigidity of the spiral tube 102 as a whole can be improved.

Furthermore, the connecting member 14 is not exposed on the inner surface side of the helical tube 102 . Therefore, the inner surface of the helical tube 102 can be made smooth, and the flow-down performance of the helical tube 102 can be improved.

The specific configuration or shape of the above-described pipe rehabilitation member 10 (the lining member 12 and the connecting member 14) can be changed as appropriate as long as the connecting member 14 can be attached from the outer surface side of the lining member 12. be.

For example, in the above-described embodiment, the lining member 12 has two engaging portions (the first engaging portion 24 and the third engaging portion 26 ), but the number of engaging portions may be one. Similarly, the connecting member 14 has two engaging portions (second engaging portion 54 and fourth engaging portion 56) as fitting portions (second engaging portion 52) with the lining member 12. The number of engaging portions may be one.

Also, in the above embodiment, the connecting member 14 has two ridges 68 formed on both sides of the base 50, but the number of ridges 68 may be one or three or more. For example, if one ridge 68 is provided, it may be provided at the widthwise central portion of the other main surface 50b of the base 50, and if three ridges 68 are provided, the other main surface 50b of the base 50 may be provided. It may be provided in the width direction central portion and both side portions.

Furthermore, in the above embodiment, the gap 42 is formed between the base ends of the displacement absorbing portions 36 of the lining member 12, but this gap 42 does not necessarily have to be formed. Also, the thin film portion connecting the main surfaces 20a of the substrate 20 may be formed integrally so as to cover the gap 42, or the thin film portion may be attached later.

Furthermore, although not provided in the above embodiment, 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.

Moreover, in the above-described embodiment, the pipe rehabilitation member 10 is used in the pipe rehabilitation method of the pushing-down type in which the helical pipe 102 is fed into the existing pipe 100 while being rotated, but the pipe rehabilitation member 10 is not limited to this. The pipe rehabilitation member 10 is a traction type pipe that feeds the helical pipe 102 into the existing pipe 100 without rotating it 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 the road rehabilitation method.

Furthermore, in the above embodiment, the existing pipe 100 and the helical pipe 102 are integrated with the filler 104 to form a composite pipe (rehabilitation pipe 106), but the present invention is not limited to this. The pipe rehabilitation member 10 can also form a self-supporting pipe that maintains strength independently of the existing pipe 100 .

It should be noted that the specific numerical values such as the dimensions given above are merely examples, and can be appropriately changed according to the needs such as product specifications.

DESCRIPTION OF SYMBOLS 10... Pipe rehabilitation member 12... Lining member 14... Connection member 20... Base of lining member (lining base)
22 ... first fitting portion 24 ... first engagement portion 26 ... third engagement portion 28 ... first projection 30 ... first locking piece 32 ... second projection 34 ... second locking piece 50 ... connection Member base (connection base)
52 ... second fitting portion 54 ... second engaging portion 56 ... fourth engaging portion 58 ... third projection 60 ... third locking piece 62 ... fourth projection 64 ... fourth locking piece 80,82 ... Gap 100 ... Existing pipe 102 ... Spiral pipe 104 ... Filling material 106 ... Rehabilitation pipe

Claims (5)

A pipe rehabilitation member used in a pipeline rehabilitation method in which a helical pipe is produced by winding a lining member spirally in a manhole and the helical pipe is fed into an existing pipe,
the lining member; and a connecting member attached from the outer surface side of the spirally wound lining member to connect adjacent side edges of the lining member,
The lining member is
a strip-shaped lining base having one main surface forming the inner surface of the helical tube; and first engaging portions formed on both sides of the other main surface of the lining base,
The connecting member is
a band plate-shaped connection base; and second engagement portions formed on the connection base and engaged with the first engagement portions,
The first engaging portion has a first ridge extending in the longitudinal direction of the lining base and a first locking piece formed on one side surface of the first ridge,
The second engaging portion includes a second ridge extending in the longitudinal direction of the connecting base and a second locking piece formed on one side surface of the second ridge and engaged with the first locking piece. and
In a state in which the adjacent side edges of the lining member are connected by the connecting member, the side edges of the adjacent lining bases are butted against each other at the connecting portion, and the first locking piece is positioned on the side of the lining base. A pipe rehabilitation member, wherein the second locking pieces are directed inward with respect to a side edge of the lining base. 2. The pipe rehabilitation member according to claim 1, wherein a gap is formed on the other side surface side of said first ridge in a state in which said connecting member connects adjacent side edge portions of said lining member. The lining member further includes a third engaging portion formed on one side surface of the first protrusion with a predetermined gap from each of the first engaging portions,
The connecting member is formed on the other side surface of the second protrusion with a predetermined gap from each of the second engaging portions, and is engaged with each of the third engaging portions. further comprising
The third engaging portion has a third ridge extending in the longitudinal direction of the lining base and a third locking piece formed on one side surface of the third ridge,
The fourth engaging portion includes a fourth ridge extending in the longitudinal direction of the connecting base, and a fourth locking piece formed on one side surface of the fourth ridge and engaged with the third locking piece. and
In a state in which the adjacent side edges of the lining member are connected by the connecting member, the third locking pieces are directed outward from the side edges of the lining base body at the connecting portion, and the fourth locking pieces are arranged at the connecting portion. 3. The pipe rehabilitation member according to claim 1 or 2, wherein the stop pieces are directed inward from each other around the side edge of the lining base. 4. The pipe rehabilitation member according to claim 3, wherein a gap is formed on the other side surface side of said third protrusion in a state in which said connecting member connects adjacent side edge portions of said lining member. The pipe rehabilitation member according to any one of claims 1 to 4, wherein the lining member is made of resin softer than the connecting member.

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