JP6931872B2 - Pipeline rehabilitation method and pipe rehabilitation member - Google Patents

Description

The present invention relates to a pipeline rehabilitation method, and more particularly to a pipeline rehabilitation method and a pipe rehabilitation member for rehabilitating an existing pipe having a rectangular cross section.

An example of a conventional method for rehabilitating a pipeline of this kind is disclosed in Patent Document 1. The technique of Patent Document 1 is a synthetic resin segment consisting of an inner surface plate, side plates erected on both sides extending in the circumferential direction of the inner surface plate, and end plates erected on both ends extending in the pipe length direction of the inner surface plate. Is assembled by connecting in the circumferential direction and the pipe length direction, and the existing pipe is rehabilitated. When rehabilitating an existing pipe having a rectangular cross section using the technique of Patent Document 1, a rectangular parallelepiped segment is used for the four sides of the rectangle, and the four corners of the rectangle are bent according to the shape. Bending segments are used.

Japanese Unexamined Patent Publication No. 2016-108723

However, in the technique of Patent Document 1, short segments of about 300 to 600 mm are fastened with bolts and nuts to form an annular body, so that construction is troublesome. This becomes more remarkable as the size of the existing pipe becomes larger.

Therefore, a main object of the present invention is to provide a novel pipeline rehabilitation method and pipe rehabilitation member.

Another object of the present invention is to provide a pipeline rehabilitation method and a pipe rehabilitation member capable of improving workability when rehabilitating an existing pipe having a rectangular cross section.

The first invention is a pipeline rehabilitation method for rehabilitating an existing pipe having a rectangular cross section, including a flat plate having a length corresponding to the side length of the existing pipe, and the back side of the flat base. Includes a plurality of straight members to which a plurality of ribs extending in the longitudinal direction are formed and a reinforcing member is attached, and a curved plate-shaped substrate curved according to the shape of the corner portion of the existing pipe. A plurality of corner members in which a plurality of ribs extending in the longitudinal direction are formed on the back side of the member, and a plurality of connectors having an insertion portion fitted between the straight member and the ribs of the corner member are prepared, and the straight member and the corner member are provided. This is a pipeline rehabilitation method in which a pipe body is formed along the inner surface of an existing pipe by using a connecting body in which the above pipes are alternately connected in the circumferential direction by a connector.

In the first invention, as a pipe rehabilitation member for forming a pipe body, a straight member arranged in a straight portion (four side portions) of an existing pipe and a corner member arranged in a corner portion are used. This linear member includes a flat substrate having a length corresponding to the side length of the existing pipe. That is, the straight member is set to a length that allows the corner members to be connected by one straight member. Then, a plurality of ribs extending in the longitudinal direction are formed on the back surface side of the flat plate-shaped substrate, and a reinforcing member is attached in advance. On the other hand, the corner member includes a curved plate-shaped substrate that is curved according to the shape of the corner portion of the existing pipe, and a plurality of ribs extending in the longitudinal direction are formed on the back surface side of the curved plate-shaped substrate. Then, a pipe body along the inner surface of the existing pipe is formed by using a connecting body in which the straight member and the corner member are alternately connected in the circumferential direction. That is, a pipe body is formed by connecting each corner member with one straight member. Further, in the first invention, when connecting the straight member and the corner member in the circumferential direction, a connector having an insertion portion fitted between the ribs of the straight member and the corner member is used.

According to the first invention, since the corner members are connected by one straight member, the labor of construction can be reduced and the workability is improved as compared with the case where short members are connected to produce a pipe. Further, since the reinforcing member is attached to the straight member, the rigidity of the straight portion of the pipe body can be increased, and the deformation of the straight portion of the pipe body and the lifting when the filler is injected can be prevented.

Further, at the time of construction, it is not necessary to bend the highly rigid member, and only the straight member and the corner member are assembled, so that a large-scale pipe making device for bending the highly rigid member becomes unnecessary. Therefore, the construction becomes easy and the construction can be performed manually.

Further, according to the first invention, as compared with the use of fastening members such as bolts and nuts, the straight member and the corner member can be easily connected, and the pipe making operation can be smoothly performed.

The second invention is dependent on the first invention, and the reinforcing member is used as a spacer for providing a predetermined space between the straight member and the existing pipe.

According to the second invention, the spacer is installed only by constructing the pipe body using the straight member. Therefore, the step of installing the spacer in the existing pipe in advance becomes unnecessary, and the construction man-hours can be reduced.

The third invention is dependent on the first or second invention, and uses a reinforcing member having a flat plate portion extending substantially on the back surface side of the flat plate-shaped substrate of the straight member.

According to the third invention, the entire surface including the longitudinal direction and the width direction of the straight member is reinforced, and the strength of the rehabilitation tube can be improved.

The fourth invention is subordinate to the third invention, and uses a reinforcing member having a rising portion that rises from the flat plate portion toward the opposite side to the flat plate-shaped substrate.

According to the fourth invention, a space having a predetermined height can be formed between the flat plate portion and the inner surface of the existing pipe. Further, the contact area between the straight member and the inner surface of the existing pipe can be reduced, that is, the contact area between the existing pipe and the filler can be increased, and the adhesion strength between the existing pipe and the filler can be increased.

The fifth invention is subordinate to any one of the first to fourth inventions, and uses a reinforcing member formed of a punching metal having a plurality of holes formed in a metal plate.

According to the fifth invention, since the reinforcing member has a plurality of holes, the filler can be easily spread over the entire back surface side of the straight member.

The sixth invention is subordinate to any one of the first to fifth inventions, and uses a corner member having a reinforcing member attached to the back surface side of the curved plate-shaped substrate.

According to the sixth invention, the strength of the corner portion of the rehabilitation tube can be increased as needed.

The seventh invention is subordinate to any one of the first to sixth inventions, and forms a tubular body by arranging the connecting bodies in a spiral winding manner.

In the seventh invention, a connecting body of a straight member and a corner member is spirally wound to form a temporary pipe, and adjacent side edges of the temporarily made connecting body are connected to each other in the pipe axis direction. To form a tube.

The eighth invention is dependent on the seventh invention, and when connecting adjacent side edges of the connecting body in the pipe axis direction, a long strip-shaped joiner longer than the peripheral length of the pipe body is used.

According to the eighth invention, by using a long joiner, it is possible to reduce the number of connection points between the joiners, so that the workability is improved.

The ninth invention is dependent on the seventh or eighth invention, and when connecting a straight member and a corner member in the circumferential direction, a connector having an elastic portion that can be expanded and contracted in the circumferential direction is used.

According to the ninth invention, even if the member position is deviated in the circumferential direction when the connecting body of the straight member and the corner member is spirally wound to make a temporary pipe, this misalignment is corrected. Can be done.

A tenth invention is a pipe rehabilitation member used for rehabilitating an existing pipe having a rectangular cross section, which includes a flat plate having a length corresponding to the side length of the existing pipe, and is provided on the back side of the flat base. , A straight member in which a plurality of ribs extending in the longitudinal direction are formed and a reinforcing member is attached , and a curved plate-shaped substrate curved corresponding to the shape of the corner portion of the existing pipe, on the back side of the curved plate-shaped substrate. A pipe rehabilitation member comprising a corner member having a plurality of ribs extending in the longitudinal direction, and a straight member and a connector having an insertion portion fitted between the ribs of the corner member.

According to the tenth invention, the rigidity of the straight portion of the tubular body can be increased, and the deformation of the straight portion of the tubular body and the lifting at the time of injecting the filler can be prevented. Further, since the corner members can be connected by one straight member, the labor of construction can be reduced and the workability is improved as compared with the case where short members are connected to form a pipe. Further, as compared with the use of fastening members such as bolts and nuts, the straight member and the corner member can be easily connected, and the pipe making work can be smoothly performed.

The eleventh invention is subordinate to the tenth invention, and the corner member includes a reinforcing member attached to the back surface side of the curved plate-shaped substrate.

According to the eleventh invention, the strength of the corner portion of the rehabilitation tube can be increased as needed.

According to the present invention, since the corner members are connected by one straight member, the labor of construction can be reduced and the workability is improved as compared with the case where short members are connected to produce a pipe. Further, since the reinforcing member is attached to the straight member, the strength of the straight portion of the pipe body can be increased, and the deformation of the straight portion of the pipe body and the lifting when the filler is injected can be prevented.

Further, when constructing the pipe body, it is not necessary to bend the highly rigid member, and only the straight member and the corner member are assembled, so that a large-scale pipe making device for bending the highly rigid member becomes unnecessary. Therefore, the construction becomes easy and the construction can be performed manually.

The above-mentioned object, other object, feature and advantage of the present invention will become more apparent from the detailed description of the examples described below with reference to the drawings.

It is a schematic diagram which shows the state which the existing pipe was rehabilitated by the pipeline rehabilitation method which is one Example of this invention. It is a front view which shows an example of a linear member. It is sectional drawing which shows the linear member of FIG. It is a perspective view which shows the member main body of the linear member of FIG. It is sectional drawing which shows the member main body of FIG. It is sectional drawing which shows the reinforcing member provided with the linear member of FIG. It is a top view which shows the reinforcing member of FIG. It is a perspective view which shows an example of a corner member. It is sectional drawing which shows the corner member of FIG. It is a perspective view which shows an example of a connector. It is a side view which shows the connector of FIG. It is a perspective view which shows an example of a joiner. It is sectional drawing which shows the joiner of FIG. It is a schematic diagram for demonstrating the pipeline rehabilitation method, and is the schematic diagram which shows the lower connection body and the upper connection body formed by connecting a straight member and a corner member with a connector. It is a schematic diagram which shows the process which follows FIG. It is a schematic diagram which shows the process which follows FIG. It is a schematic diagram which shows the process which follows FIG. FIG. 5 is an illustrated diagram showing a step following FIG. 17, showing a state in which a filler is filled between an existing pipe and a pipe body to form a rehabilitated pipe. It is sectional drawing which shows another example of the linear member. It is a side view which shows an example of the reinforcing member attached to a corner member. It is a front view which shows the reinforcing member of FIG. It is a schematic diagram which shows the end structure of the corner member provided with the reinforcing member of FIG. It is an exploded perspective view which shows an example of the connector which has a telescopic part. It is an exploded perspective view which shows another example of the connector which has a telescopic part. It is a schematic diagram for demonstrating another embodiment of the pipeline rehabilitation method, and is the schematic diagram which shows the state which the connected bodies formed in an annular shape are arranged side by side in the pipe axis direction. It is a schematic diagram which shows the process which follows FIG.

With reference to FIG. 1, the pipeline rehabilitation method according to an embodiment of the present invention is a method for rehabilitating an existing pipe (rectangular tube) 100 having a rectangular cross section, and is a strip-shaped pipe rehabilitation method. The pipe body 102 is formed in the existing pipe 100 by using the members. By injecting a filler into the gap between the pipe body 102 and the existing pipe 100, the existing pipe 100 and the pipe body 102 are integrated into a rehabilitated pipe.

As will be described in detail later, in this pipeline rehabilitation method, the pipe rehabilitation members are arranged in the straight member 10 arranged in the straight portion (four sides) 100a of the existing pipe 100 and in the corner portion (four corners) 100b. The corner member 12 to be formed is used. Then, a pipe body 102 along the inner surface of the existing pipe 100 is formed by using a connecting body in which the straight member 10 and the corner member 12 are alternately connected in the circumferential direction. In this first embodiment, the tubular body 102 is formed by arranging the coupling bodies in a spiral winding manner and connecting the adjacent side edges of the coupling bodies in the pipe axis direction.

The pipeline rehabilitation method according to the present invention can be applied to rehabilitation of various existing pipes 100 such as reinforced concrete pipes, synthetic resin pipes and metal pipes, and in particular, medium-sized and large-sized pipes having a side length of 800 mm-3000 mm. Suitable for rehabilitation of sewer pipes with caliber. In the following description, it is assumed that a reinforced concrete pipe having a square cross section having a side length of 2000 mm is rehabilitated.

First, the members used in this pipeline rehabilitation method will be described. In this embodiment, a straight member 10, a corner member 12, a connector 14, a joiner 16, and the like are used as the pipe rehabilitation member forming the pipe body 102.

As shown in FIGS. 2 and 3, the straight member 10 is a member for rehabilitating the straight portion 100a of the existing pipe 100, and includes a member main body 20 made of synthetic resin and a reinforcing member 22 made of metal. The member main body 20 is manufactured by cutting, for example, a long strip integrally formed by extrusion molding of a synthetic resin such as hard vinyl chloride into a predetermined length. The reinforcing member 22 is manufactured by processing a metal plate such as steel or stainless steel, and is placed on the back side of the member main body 20 before the straight member 10 is used for forming the pipe body 102 in a manufacturing factory or the like. It is attached. In this embodiment, the reinforcing member 22 is formed of a 2.3 mm thick punching metal made of SS400. Hereinafter, the configurations of the member main body 20 and the reinforcing member 22 will be specifically described.

As shown in FIGS. 4 and 5, the member body 20 of the linear member 10 includes a flat plate-shaped substrate 24. The first main surface 24a of the flat plate-shaped substrate 24 is a surface constituting the inner surface of the tubular body 102 and is a smooth surface. Further, a plurality of ribs 26 arranged at predetermined intervals in the width direction are formed on the second main surface 24b side (back surface side) of the flat plate-shaped substrate 24. The rib 26 is formed in a substantially T-shaped cross section, and exhibits an anchor function by being embedded in a filler 104 described later. Further, on both side edges of the flat plate-shaped substrate 24, a first engaging portion 28 to be fitted with a second engaging portion 62 of the joiner 16 described later is formed. The rib 26 and the first engaging portion 28 are formed over the entire length of the flat plate-shaped substrate 24 in the longitudinal direction.

The length of the flat plate-shaped substrate 24, that is, the member main body 20 in the longitudinal direction is set to a length corresponding to the side length of the existing pipe 100. That is, the straight member 10 has a length capable of connecting the corner members 12 with one straight member 10. The length (circumferential length) of the member main body 20 in the longitudinal direction is, for example, 1000 mm. The width (length in the pipe axis direction) of the member body 20 is, for example, 250 mm, and the height (length in the radial direction) thereof is, for example, 17.5 mm.

As shown in FIGS. 6 and 7, the reinforcing member 22 is a member for increasing the rigidity of the linear member 10 by being attached to the second main surface 24b side of the flat plate-shaped base 24 of the member main body 20. The reinforcing member 22 includes a rectangular flat plate portion 30 provided so as to extend substantially over the second main surface 24b side of the flat plate-shaped substrate 24. Hook-shaped portions 32 projecting toward the flat plate-shaped substrate 24 side (inner surface side) are provided on both side edges and the central portion of the flat plate portion 30. Further, on both side edges of the flat plate portion 30, a rectangular flat plate-shaped rising portion 34 that rises toward the opposite side (back surface side) of the flat plate-shaped substrate 24 is provided. In this embodiment, the hook-shaped portion 32 and the rising portion 34 are provided over the entire length of the flat plate portion 30 in the longitudinal direction. Further, a plurality of holes 36 penetrating in the thickness direction are formed in the flat plate portion 30, the hook-shaped portion 32, and the rising portion 34 in a predetermined arrangement mode.

In such a reinforcing member 22, the hook-shaped portion 32 is fitted between the ribs 26 of the member main body 20 or between the ribs 26 and the first engaging portion 28, and the tip of the rib 26 or the first engaging portion 28 is fitted. By being hooked on the portion, it is fixed to the member main body 20 to prevent it from coming off. Here, the reinforcing member 22 has a flat plate portion 30 that extends substantially over the second main surface 24b side of the flat plate-shaped substrate 24, so that the entire surface of the straight member 10 including the longitudinal direction and the width direction is reinforced. Further, since the reinforcing member 22 has the rising portion 34, a space having a predetermined height can be formed between the flat plate portion 30 and the inner surface of the existing pipe 100, and the contact area between the straight member 10 and the inner surface of the existing pipe 100 can be formed. (That is, the contact area between the existing pipe 100 and the filler 104 is increased), and the adhesion strength between the existing pipe 100 and the filler 104 can be increased. Further, since the reinforcing member 22 is formed with the plurality of holes 36, the filler 104 can be easily spread over the entire back surface side of the straight member 10.

Further, the reinforcing member 22 of this embodiment is formed so as to project toward the back surface side from the tip of the rib 26 of the member main body 20, and is used to provide a predetermined space between the straight member 10 and the existing pipe 100. Functions as a spacer. That is, the strength of the rehabilitation pipe can be improved by increasing the thickness of the filler 104, and the strength of the rehabilitation pipe can be improved by becoming a structural member itself. The protruding height of the reinforcing member 22 from the tip of the rib 26 is, for example, 42.5 mm.

As shown in FIGS. 8 and 9, the corner member 12 is a member for rehabilitating the corner portion 100b of the existing pipe 100, and includes a member main body 40 made of synthetic resin. The member main body 40 is manufactured, for example, by cutting a long strip integrally formed by extrusion molding of a synthetic resin such as hard vinyl chloride into a predetermined length and bending it to a predetermined curvature. At this time, the long strip-shaped body for forming the member main body 40 of the corner member 12 is the same as the long strip-shaped body for forming the member main body 20 of the straight member 10. That is, the member main body 40 of the corner member 12 has the same cross-sectional shape as the member main body 20 of the straight member 10.

Specifically, the member main body 40 of the corner member 12 includes a curved plate-shaped substrate 42 that is curved according to the shape of the corner portion 100b of the existing pipe 100. The first main surface 42a of the curved plate-shaped substrate 42 is a surface constituting the inner surface of the tubular body 102, and is a smooth surface. A plurality of ribs 44 arranged at predetermined intervals in the width direction are formed on the second main surface 42b side of the curved plate-shaped substrate 42. Further, a first engaging portion 46 to be fitted with the second engaging portion 62 of the joiner 16 is formed on both side edges of the curved plate-shaped substrate 42. The rib 44 and the first engaging portion 46 are formed over the entire length of the curved plate-shaped substrate 42 in the longitudinal direction. The radius of curvature of the corner member 12 (curved plate-shaped substrate 42) is, for example, 530 mm, and the arc length thereof is, for example, 1030 mm.

As shown in FIGS. 10 and 11, the connector 14 is a connecting member for connecting the end of the straight member 10 and the end of the corner member 12 in the longitudinal direction (circumferential direction). The connector 14 has a plurality of insertion portions 50 fitted between the ribs 26 of the straight member 10 and between the ribs 44 of the corner member 12. Each insertion portion 50 is formed in a groove shape including a rectangular bottom plate 50a and two side plates 50b rising from both side edges of the bottom plate 50a. Further, each insertion portion 50 is connected by a base portion 52 extending in the width direction. The first main surface 52a of the base portion 52 constitutes the inner surface of the pipe body 102 together with the first main surface 24a of the straight member 10 or the first main surface 42a of the corner member 12. Further, on both side edges of the base 52, a first engaging portion 54 to be fitted with the second engaging portion 62 of the joiner 16 is formed. Such a connector 14 is manufactured, for example, by injection molding a synthetic resin such as hard vinyl chloride.

When connecting the straight member 10 and the corner member 12 in the longitudinal direction, after the adhesive having a water blocking property is applied to each insertion portion 50 of the connector 14, each insertion portion 50 is between the ribs 26 or 44. It is fitted into and adhesively joined. At this time, the bottom plate 50a of the insertion portion 50 comes into surface contact with the second main surface 24b of the straight member 10 or the second main surface 42b of the corner member 12, and the side plate 50b comes into surface contact with the rib 26 or the side surface of the rib 44. .. By connecting the straight member 10 and the corner member 12 in the circumferential direction by using such a fitting type connector 14, the straight member 10 and the corner member 12 can be easily connected as compared with using a fastening member such as a bolt and a nut, and the pipe body can be connected. The pipe making work of 102 can be performed smoothly.

As shown in FIGS. 12 and 13, the joiner 16 is for connecting the adjacent side edges of the connecting body in which the straight member 10 and the corner member 12 are connected by the connector 14 in the width direction (tube axis direction). It is a long connecting member. The joiner 16 includes a long strip-shaped joiner substrate 60. The first main surface 60a of the joiner substrate 60 constitutes the inner surface of the tubular body 102 together with the first main surface 24a of the straight member 10 or the first main surface 42a of the corner member 12. Further, on both side edges of the joiner substrate 60, a second engaging portion 62 is formed which is fitted to each of the first engaging portions 28, 46, 54 of the straight member 10, the corner member 12, and the connector 14. A water blocking material 64 is provided on the second engaging portion 62.

Further, in the central portion of the joiner substrate 60, a U-shaped groove portion 66 protruding from the second main surface 60b of the joiner substrate 60 and a wave-shaped portion connecting the second main surfaces 60b to each other so as to cover the entire groove portion 66 are formed. An elastic portion including the flexible portion 68 is formed. Such an expansion / contraction portion can be expanded / contracted according to the deformation of the groove portion 66, and by breaking (dividing) the groove portion 66 in the width direction, a large expansion / contraction according to the deformation of the flexible portion 68 becomes possible.

The joiner substrate 60, the second engaging portion 62, and the groove portion 66 of the joiner 16 are integrally molded by, for example, extrusion molding of a synthetic resin such as hard vinyl chloride. Further, the flexible portion 68 is formed of, for example, a polyolefin-based resin such as polyethylene, and is fixed to the joiner substrate 60. The second engaging portion 62, the water blocking material 64, the groove portion 66, and the flexible portion 68 are formed over the entire length of the joiner substrate 60 in the longitudinal direction.

The length of the joiner 16 in the longitudinal direction is not particularly limited, but is preferably at least longer than the peripheral length of the tubular body 102, and is a connecting body of the straight member 10 and the corner member 12 that are spirally wound and temporarily formed. It is more preferable to have a length capable of connecting the side edges with one joiner 16. This is because if the length of the joiner 16 is short, the number of places where the ends of the joiner 16 are connected to each other increases accordingly. That is, by using the long joiner 16, the number of connection points between the joiners 16 can be reduced, and the workability is improved. Further, by connecting the straight member 10 and the corner member 12 in the pipe axis direction by using such a fitting type joiner 16, it is possible to connect the straight member 10 and the corner member 12 more easily as compared with using a fastening member such as a bolt and a nut. , The pipe making work of the pipe body 102 can be smoothly performed.

Subsequently, with reference to FIGS. 1 and 14-18, an example of a pipeline rehabilitation method for rehabilitating the existing pipe 100 using the pipe rehabilitation member as described above will be specifically described.

When rehabilitating the existing pipe 100, first, pipe rehabilitation members such as a straight member 10, a corner member 12, a connector 14 and a joiner 16 and necessary tools and machines are prepared on the ground near the rehabilitation section of the existing pipe 100. .. Further, the inside of the existing pipe 100 is cleaned in advance using a high pressure washer or the like.

Next, the pipe body 102 is constructed in the existing pipe 100. That is, the existing pipe 100 is arranged by spirally winding a connecting body in which the straight member 10 and the corner member 12 are alternately connected in the circumferential direction and connecting the side edges thereof in the pipe axial direction. A tubular body 102 is formed along the inner surface of the.

Specifically, as shown in FIG. 14, the lower connecting body 70 constituting the lower part of the pipe body 102 and the upper connecting body 72 forming the upper part of the pipe body 102 are assembled on the ground. Each of the lower connecting body 70 and the upper connecting body 72 is formed by connecting the corner members 12 to both ends of the straight member 10 by using, for example, a connector 14, and as described later, the pipe body 102 in the existing pipe 100 The tubular body 102 is formed by combining with the linear members 10 constituting both side portions of the above. Assemble the lower connecting body 70 and the upper connecting body 72 in the number required for forming the pipe body 102.

Next, as shown in FIG. 15, the lower connecting body 70 is carried into the existing pipe 100 (omitted in FIGS. 15 to 17), and the lower connecting body 70 is moved in the pipe axial direction along the lower inner surface of the existing pipe 100. Place them side by side. At this time, the lower connecting body 70 is arranged so as to extend slightly diagonally with respect to the direction orthogonal to the pipe axis direction, assuming a spiral shape.

Subsequently, as shown in FIG. 16, the upper connecting body 72, the straight member 10, the connector 14, and the like are carried into the existing pipe 100. Then, using the connector 14, the straight members 10 are connected to both ends of the lower connecting body 70, and the upper connecting body 72 is connected to these straight members 10. At this time, the upper connecting body 72 connects the straight member 10 connected to one end portion and the other end portion of the adjacent lower connecting bodies 70 in an oblique direction. As a result, the connecting body in which the straight member 10 and the corner member 12 are alternately connected in the circumferential direction is arranged so as to spirally wind. That is, the spiral pipe 74 along the inner surface of the existing pipe 100 is temporarily manufactured by the long connecting body connecting the straight member 10 and the corner member 12.

Subsequently, as shown in FIG. 17, the first engaging portions 28,46,54 of the straight member 10, the corner member 12, and the connector 14 and the second engaging portion 62 of the joiner 16 are fitted together to form a spiral tube. The adjacent side edges of 74 are connected by a spirally wound joiner 16. As a result, a pipe body 102 having the same cross-sectional dimension over the entire length of the rehabilitation section is formed in the existing pipe 100.

When the pipe body 102 is formed in the existing pipe 100, a filler (backing material) 104 is injected between the inner surface of the existing pipe 100 and the outer surface of the pipe body 102, and as shown in FIGS. 1 and 18. The existing pipe 100 and the pipe body 102 are integrated to form a rehabilitation pipe. After that, the rehabilitation work of the existing pipe 100 is completed by appropriately carrying out the tidying up work and the like.

As described above, according to this embodiment, since each corner member 12 is connected by one straight member 10, it is possible to reduce the labor of construction as compared with connecting short members to form a pipe. Workability is improved. Further, since the reinforcing member 22 is attached to the straight member 10, the rigidity of the straight portion of the tubular body 102 can be increased, and the deformation of the straight portion of the tubular body 102 and the lifting when the filler 104 is injected can be prevented. ..

Further, when constructing the pipe body 102, it is not necessary to bend the highly rigid member, and the straight member 10 and the corner member 12 are simply assembled using the connector 14 and the joiner 16, so that a large scale for bending the highly rigid member is required. No need for pipe making equipment. Therefore, the construction becomes easy and the construction can be performed manually.

Further, since the reinforcing member 22 included in the straight member 10 is used as a spacer for providing a predetermined space between the straight member 10 and the existing pipe 100, the spacer can be obtained only by constructing the pipe body 102 using the straight member 10. Will be installed. Therefore, the step of installing the spacer in the existing pipe 100 in advance becomes unnecessary, and the construction man-hours can be reduced. Further, the rehabilitation pipe in which the existing pipe 100 and the pipe body 102 are integrated is also reinforced by the reinforcing member 22. Therefore, there is no need for a reinforcing step of installing reinforcing bars or spacers on the inner surface of the existing pipe 100 to improve the strength of the rehabilitated pipe, which is performed when the strength of the existing pipe 100 is low.

The specific configuration or shape of the pipe rehabilitation member such as the straight member 10, the corner member 12, the connector 14, and the joiner 16 described above (ribs 26,44, engaging portions 28,46,54,62, reinforcing member 22, etc.) ) Is just an example and can be changed as appropriate.

For example, as shown in FIG. 19, the reinforcing member 22 attached to the straight member 10 may have a simple shape. The reinforcing member 22 shown in FIG. 19 includes a long strip-shaped substrate 80, and hook-shaped portions 82 projecting toward the flat plate-shaped substrate 24 side are formed on both side edges of the substrate 80. For example, the reinforcing member 22 is attached to both side edges on the back surface side of the member body 20 so as to extend over the entire length of the member body 20 in the longitudinal direction. Further, the reinforcing member 22 is formed so as to project toward the back surface side from the tip of the rib 26 of the member main body 20, and functions as a spacer for providing a predetermined space between the straight member 10 and the existing pipe 100. However, the reinforcing member 22 does not necessarily have to be used as a spacer, and may be attached to the member main body 20 so as to fit in the position up to the protruding height of the rib 26.

Further, a reinforcing member may be attached to the corner member 12. Since the corner member 12 has a curved shape in which the back surface side is convex, it is strong against external pressure due to its arch effect, and deformation of the member is unlikely to occur. However, by attaching a reinforcing member, the corner member 12 can be made stronger against external pressure. Therefore, the tubular body 102 can be made highly rigid over the entire length in the circumferential direction.

20 and 21 show an example of the reinforcing member 84 attached to the corner member 12. The reinforcing member 84 includes a rectangular curved plate-shaped curved plate portion 86 provided so as to extend along substantially the entire side of the second main surface 42b of the curved plate-shaped base 42 of the corner member 12. At both ends of the curved plate portion 86, hook-shaped portions 88 projecting toward the curved plate-shaped base 42 side and rectangular flat plate-shaped rising portions rising toward the opposite side of the curved plate-shaped base 42 are provided on both side edges thereof. 90 is provided. Further, a plurality of holes 92 penetrating in the thickness direction are formed in the curved plate portion 86 and the rising portion 90 in a predetermined arrangement mode.

In such a reinforcing member 84, as shown in FIG. 22, the hook-shaped portion 88 is fitted between the rib 44 of the member main body 40 of the corner member 12 and the first engaging portion 46, and the first engaging portion 84 is engaged. By being hooked on the tip end portion of the portion 46, it is fixed to the member main body 40 to prevent it from coming off. Here, the reinforcing member 84 has a curved plate portion 86 that extends substantially over the second main surface 42b side of the curved plate-shaped substrate 42, so that the entire surface of the corner member 12 including the longitudinal direction and the width direction is reinforced. NS. Further, since the reinforcing member 84 has the rising portion 90, a space having a predetermined height can be formed between the curved plate-shaped substrate 42 and the inner surface of the existing pipe 100, and the corner member 12 and the inner surface of the existing pipe 100 can be formed. The contact area can be reduced to increase the adhesion strength between the existing pipe 100 and the filler 104. Further, since the reinforcing member 84 is formed with the plurality of holes 92, the filler 104 can be easily spread over the entire back surface side of the corner member 12. Further, the reinforcing member 84 is formed so as to project toward the back surface side from the tip of the rib 44 of the member main body 40, and functions as a spacer for providing a predetermined space between the corner member 12 and the existing pipe 100.

Further, as a connector for connecting the straight member 10 and the corner member 12 in the circumferential direction, a connector having a telescopic portion that can expand and contract in the circumferential direction can also be used. When the temporary pipe is formed so as to spirally wind the connecting body of the straight member 10 and the corner member 12, the positions of the straight member 10 and the corner member 12 may shift in the circumferential direction as the temporary pipe advances. A connector having an elastic part is used to correct this misalignment. Therefore, the connector having the telescopic portion is arranged at a ratio of about one in several turns when the connecting body is spirally wound.

FIG. 23 shows an example of the connector 110 having the telescopic portion. The connector 110 shown in FIG. 23 includes a female first connector member 112, a male second connector member 114, and a cover member 116. The first connector member 112 includes a base 120 having a flat cylindrical socket shape with one end open. The first main surface of the base portion 120 constitutes the inner surface of the tubular body 102, and the first engaging portion 122 to be fitted with the second engaging portion 62 of the joiner 16 is formed on both side edges of the base portion 120. .. Further, at the other end of the base portion 120, a plurality of insertion portions 124 to be fitted between the ribs 26 of the straight member 10 or between the ribs 44 of the corner member 12 are formed.

On the other hand, the second connector member 114 includes a rectangular flat plate-shaped base portion 126. The first main surface of the base 126 constitutes the inner surface of the tubular body 102, and the first engaging portion 128 fitted with the second engaging portion 62 of the joiner 16 is formed on both side edges of the base 126. .. Further, at one end of the base portion 126, a plurality of insertion portions 130 to be fitted between the ribs 26 of the straight member 10 or between the ribs 44 of the corner member 12 are formed. Further, an insertion portion 132 that is slidably inserted into the base portion 120 of the first connector member 112 is formed at the other end of the base portion 126, and a rubber ring 134 is attached to the tip portion of the insertion portion 132.

Further, the cover member 116 is a member inserted between the base portion 120 and the base portion 126 so as to cover the exposed portion (recess) of the insertion portion 132, and includes a rectangular flat plate-shaped base portion 136. The first main surface of the base 136 constitutes the inner surface of the tubular body 102, and the first engaging portion 138 fitted with the second engaging portion 62 of the joiner 16 is formed on both side edges of the base 136. ..

Such a connector 110 can be expanded and contracted in the circumferential direction (fitting direction) by adjusting the insertion amount of the insertion portion 132 of the second connector member 114 with respect to the base portion 120 of the first connector member 112. That is, the base portion 120 and the insertion portion 132 serve as the expansion / contraction portion of the connector 110.

Further, FIG. 24 shows another example of the connector 110 having the telescopic portion. The connector 110 shown in FIG. 24 includes a female first connector member 140 and two male second connector members 142. The first connector member 140 includes a base portion 144 having a flat cylindrical socket shape with both ends open. The first main surface of the base portion 144 constitutes the inner surface of the tubular body 102, and the first engaging portion 146 fitted with the second engaging portion 62 of the joiner 16 is formed on both side edges of the base portion 144. ..

On the other hand, the second connector member 142 has the same shape as the above-mentioned second connector member 114. That is, a rectangular flat plate-shaped base portion 148 is provided, and a first engaging portion 150 is formed on both side edges of the base portion 148. Further, a plurality of insertion portions 152 are formed at one end of the base portion 148. Further, an insertion portion 154 that is slidably inserted into the base portion 144 of the first connector member 140 is formed at the other end of the base portion 148, and a rubber ring 156 is attached to the tip portion of the insertion portion 154.

Although not shown, the connector 110 shown in FIG. 24 includes a cover member that covers the exposed portion of the insertion portion 154. However, the cover member is not always necessary, and the exposed portion of the insertion portion 154 can be filled with putty or the like. This also applies to the connector 110 shown in FIG. 23.

Further, in the above-described embodiment, the tubular body 102 is formed by spirally winding the connecting body of the straight member 10 and the corner member 12, but the present invention is not limited to this. As in the embodiment shown in FIGS. 25 and 26, the tubular body 102 can also be formed by using the annular body 76 formed by the connecting body of the straight member 10 and the corner member 12.

In the pipeline rehabilitation method shown in FIGS. 25 and 26, a plurality of annular bodies 76 are formed by a connecting body in which straight members 10 and corner members 12 are alternately connected in the circumferential direction, and the plurality of annular bodies 76 are connected in the pipe axis direction. By arranging them side by side and connecting the side edges of the annular body 76 in the pipe axis direction, the pipe body 102 along the inner surface of the existing pipe 100 is formed.

Specifically, as shown in FIG. 25, first, the annular bodies 76 are arranged side by side in the pipe axis direction. At this time, similarly to the above-described embodiment for forming the spiral pipe 74, the lower connecting body 70 forming the lower part of the pipe body 102 and the upper connecting body 72 forming the upper part of the pipe body 102 are formed on the ground. assemble. Next, the lower connecting body 70 is carried into the existing pipe 100 (omitted in FIGS. 25 and 26), and the lower connecting bodies 70 are arranged side by side in the pipe axis direction along the lower part of the inner surface of the existing pipe 100. At this time, the lower connecting body 70 is arranged so as to extend in a direction orthogonal to the pipe axis direction. Subsequently, the upper connecting body 72 and the like are carried into the existing pipe 100, and both ends of the upper connecting body 72 and both ends of the lower connecting body 70 are connected in an annular shape by using the connector 14 and the straight member 10. As a result, the annular bodies 76 along the inner surface of the existing pipe 100 are arranged side by side in the pipe axis direction.

Subsequently, as shown in FIG. 26, the first engaging portions 28, 46, 54 of the straight member 10, the corner member 12, and the connector 14 constituting the annular body 76 and the second engaging portion 62 of the joiner 16 are subsequently attached. The side edges of the adjacent annular bodies 76 are fitted together and connected by an annular joiner 16. As a result, a pipe body 102 having the same cross-sectional dimension over the entire length of the rehabilitation section is formed in the existing pipe 100.

Even in the pipeline rehabilitation method for forming the annular body 76 as shown in FIGS. 25 and 26, the same action and effect as the above-mentioned pipeline rehabilitation method for forming the spiral pipe 74 can be obtained, the labor for construction can be reduced, and the construction can be performed. Improves sex.

In each of the above-described embodiments, the lower connecting body 70 and the upper connecting body 72 are assembled on the ground in order to reduce the work in the existing pipe 100 and efficiently form the pipe body 102. Not limited to. All the assembly work of the pipe body 102 can be performed in the existing pipe 100. That is, in the existing pipe 100, the straight member 10 and the corner member 12 may be alternately connected in the circumferential direction to be assembled in a spiral or an annular shape. Further, the number of the straight member 10 and the corner member 12 constituting the lower connecting body 70 and the upper connecting body 72 can be changed as appropriate.

Further, in each of the above-described embodiments, the joiner 16 having the telescopic portion is used, but the joiner 16 does not necessarily have to include the telescopic portion. Further, the side edge portions of the connecting body in which the straight member 10 and the corner member 12 are connected in the circumferential direction do not necessarily have to be connected by using the joiner 16, and the side edge portions of the connecting body are directly connected to each other. You can also do it.

The specific numerical values such as the dimensions mentioned above are merely examples, and can be changed as appropriate according to the needs of the product specifications and the like.

10 ... Straight member 12 ... Corner member 14,110 ... Connector 16 ... Joiner 22,84 ... Reinforcing member 24 ... Flat plate base 26,44 ... Rib 28,46,54 ... First engaging part 30 ... Flat plate part 34 ... Rising Part 42 ... Curved plate-shaped base 50 ... Insertion part 62 ... Second engaging part 74 ... Spiral tube 76 ... Ring body 100 ... Existing pipe 102 ... Tube body 104 ... Filler

Claims (11)

It is a pipeline rehabilitation method for rehabilitating an existing pipe with a rectangular cross section.
A plurality of straight members including a flat plate having a length corresponding to the side length of the existing pipe, having a plurality of ribs extending in the longitudinal direction formed on the back surface side of the flat plate and having a reinforcing member attached. When,
A plurality of corner members including a curved plate-shaped substrate curved corresponding to the shape of the corner portion of the existing pipe, and a plurality of ribs extending in the longitudinal direction are formed on the back surface side of the curved plate-shaped substrate .
A plurality of connectors having an insertion portion to be fitted between the ribs of the straight member and the corner member are prepared.
A pipeline rehabilitation method for forming a pipe body along the inner surface of an existing pipe by using a connecting body in which the straight member and the corner member are alternately connected by the connector in the circumferential direction. The use of the reinforcing member as a spacer for providing a predetermined space between the existing pipe and the linear member, pipe rehabilitating method of claim 1. The method for rehabilitating a pipeline according to claim 1 or 2 , wherein the reinforcing member has a flat plate portion extending substantially on the back surface side of the flat plate-shaped substrate. The method for rehabilitating a pipeline according to claim 3 , wherein the reinforcing member has a rising portion that rises from the flat plate portion toward the side opposite to the flat plate-shaped substrate. The pipeline rehabilitation method according to any one of claims 1 to 4 , wherein the reinforcing member is formed of punching metal. The pipeline rehabilitation method according to any one of claims 1 to 5 , wherein the corner member includes a reinforcing member attached to the back surface side of the curved plate-shaped substrate. The method for rehabilitating a pipeline according to any one of claims 1 to 6 , wherein the tubular body is formed by arranging the connecting body in a spiral winding manner. The method for rehabilitating a pipeline according to claim 7 , wherein when the adjacent side edges of the connecting body are connected to each other in the pipe axis direction, a long strip-shaped joiner longer than the peripheral length of the pipe body is used. The pipeline rehabilitation method according to claim 7 or 8 , wherein when the straight member and the corner member are connected in the circumferential direction, a connector having a telescopic portion that can expand and contract in the circumferential direction is used. A pipe rehabilitation member used for rehabilitation of existing pipes with a rectangular cross section.
A linear member containing a flat plate having a length corresponding to the side length of the existing pipe, having a plurality of ribs extending in the longitudinal direction formed on the back surface side of the flat base and having a reinforcing member attached .
A corner member including a curved plate-shaped substrate curved corresponding to the shape of the corner portion of the existing pipe, and a plurality of ribs extending in the longitudinal direction formed on the back surface side of the curved plate-shaped substrate, and a corner member.
A pipe rehabilitation member comprising a connector having an insertion portion fitted between the ribs of the straight member and the corner member. The pipe rehabilitation member according to claim 10, wherein the corner member includes a reinforcing member attached to the back surface side of the curved plate-shaped substrate.

Images