JP6867968B2 - Pipe structure of pipe rehabilitation method - Google Patents

Description

The present invention relates to a pipe structure of a pipe rehabilitation method, and particularly relates to a pipe structure of a pipe rehabilitation method in which a reinforcing material is arranged in a gap between adjacent ribs of a strip-shaped body.

Conventionally, in the pipe structure of the pipe rehabilitation method for rehabilitating an existing pipe buried in the ground, for example, a strip is spirally and continuously wound around the inner wall surface of the existing pipe, and the strip is also formed. In some cases, a reinforcing material is placed in the gap between the ribs adjacent to the body, and a filler is filled between the inner peripheral surface of the existing pipe and the strip-shaped body.
As a reinforcing material for the tubular structure, there is one provided with anti-slip means in the longitudinal direction of the strip-shaped body, which is provided with an acute-angled biting portion at a portion in contact with the strip-shaped body.

Japanese Patent No. 35999359

However, conventionally, in the pipe structure of the pipe rehabilitation method, when the reinforcing material wound around the spiral gap between the adjacent ribs of the strip-shaped body is not a fixed position but a different position for each winding. In addition, for example, when a part of the reinforcing material is in contact with the strip, another part of the reinforcing material is floating from the strip, or the pitch of the wound reinforcing material is different for each winding. , The strength of each part of the spiral strip is likely to vary, which may reduce the strength of the tubular structure, and improvement has been desired.

Therefore, in the present invention, the reinforcing material arranged in the gap between the adjacent ribs of the strip-shaped body is held at a specific position to prevent the strength from being varied in each part of the spiral strip-shaped body, and the tubular body structure is formed. The purpose is to prevent a decrease in the strength of an object.

The present invention relates to a long strip, a fitting recess on one side of the strip extending in the longitudinal direction, a fitting protrusion on the other end extending in the longitudinal direction of the strip, and the strip. A strip-shaped body including rib portions composed of a plurality of ribs extending in the longitudinal direction of the strip plate and standing side by side at predetermined intervals in the lateral direction of the strip plate is provided on one surface, and the strip-shaped body is spirally formed. The fitting recesses that are continuously wound and adjacent to each other and the fitting protrusions are fitted to connect the strips, and the spirally wound strips are adjacent to each other on the outer peripheral surface. A reinforcing material is provided in the gap between the ribs, and the tips of the plurality of ribs of the spirally wound strip are arranged in contact with the inner peripheral surface of the existing pipe and wound in the spiral shape. In the pipe structure of the pipe rehabilitation method, which is formed by filling a filler between the rotated strip and the existing pipe, the reinforcing material is held at a specific position in the gap between the adjacent ribs. It is characterized by being provided with a fastener for holding a reinforcing material.
The reinforcing material holding fastener is provided on a pair of rising portions and the tip portions of the adjacent ribs, which rise from the holding portion, which is the bottom portion, and the holding portion with a separation width substantially equal to the diameter of the reinforcing material. It has a pair of engaging portions to be engaged, and the rising portion is provided with a support portion extending to the opposite rising portion side, and the reinforcing material is provided in the internal space between the pair of rising portions. It exhibits a structure in which the reinforcing material is held at a specific position by the pair of rising portions, the holding portion, and the supporting portion while accommodating the material.
Further, the support portion is formed by making a U-shaped cut in the rising portion, and is bent so as to be narrowed toward the center side of the holding portion by bending with a bent portion having no break. It presents a structure.

In the present invention, since the reinforcing material is held at a specific position in the gap between the adjacent ribs of the strip-shaped body by the reinforcing material holding fastener, it is possible to prevent the strength from being varied in each part of the spiral strip-shaped body. , It is possible to prevent a decrease in the strength of the tubular structure.

FIG. 1 is a perspective view of each device provided during pipe manufacturing by the pipe rehabilitation method. (Example 1) FIG. 2 is a perspective view of a filler supply device provided at the time of filling the filler in the pipe rehabilitation method. (Example 1) FIG. 3 is a cross-sectional view of the strip-shaped body. (Example 1) FIG. 4 is a perspective view when an adhesive for connecting the fitting concave portion and the fitting convex portion adjacent to each other of the strip is applied. (Example 1) FIG. 5 is a partial cross-sectional perspective view in which the pipe structure is installed in the existing pipe. (Example 1) FIG. 6 is a perspective view of the reinforcing material holding fastener. (Example 1) FIG. 7 is a partial perspective view of a strip-shaped body in which a reinforcing material holding fastener is arranged. (Example 1) FIG. 8 is a schematic enlarged cross-sectional view of a strip-shaped body in which the reinforcing material holding fastener is arranged. (Example 1) FIG. 9 is a perspective view of the reinforcing material holding fastener. (Example 2) FIG. 10 is a partial perspective view of a strip-shaped body in which a reinforcing material holding fastener is arranged. (Example 2) FIG. 11 is a schematic enlarged cross-sectional view of a strip-shaped body in which the reinforcing material holding fastener is arranged. (Example 2) FIG. 12 is a schematic enlarged cross-sectional view of a strip-shaped body in which the reinforcing material holding fastener is arranged. (Example 3) FIG. 13 is a schematic enlarged cross-sectional view of a strip-shaped body in which the reinforcing material holding fastener is arranged. (Example 4) FIG. 14 is a perspective view of a reinforcing material holding fastener on which the reinforcing material is held. (Example 5)

According to the present invention, the reinforcing material is held at a specific position in the gap between the adjacent ribs of the spiral strip, and the strength of each part of the spiral strip is prevented from being varied, and the tubular structure is constructed. The purpose of preventing a decrease in strength is realized by arranging a reinforcing material holding fastener for holding the reinforcing material in a specific position in a gap between adjacent ribs of a spirally wound strip-shaped body. is there.

1 to 8 show Example 1 of the present invention.
As shown in FIGS. 1 and 2, in the pipe rehabilitation method, the existing pipe 1 buried in the ground is rehabilitated without excavating the ground (for example, the road surface) 2, and the ground 2 is rehabilitated. A pipe structure (rehabilitation pipe) 5 is attached to the inner peripheral surface of the existing horizontal pipe 1 arranged from the installed manhole 3 to the underground space 4 inside.
In implementing the pipe rehabilitation method, as each device, a strip-shaped body supply device 6 installed on the ground 2, a pipe making device 7 installed from the manhole 3 to the underground space 4, and a hydraulic unit 8 installed on the ground 2. A reinforcing material supply device 9 installed on the ground 2 and a filler supply device 10 installed on the ground 2 are provided.

The strip-shaped body supply device 6 supplies the strip-shaped body (strip) 11 from the manhole 3 to the pipe making device 7.
The pipe making device 7 includes a pipe making machine 12 and a pipe making cage 13 that can be assembled in the underground space 4, introduces the strip 11 from the strip supply device 6 into the pipe making machine 12, and then introduces the strip 11 Is forcibly curved by the pipe making cage 13 and sequentially wound in a spiral shape to form a pipe structure (rehabilitation pipe) 5.
The hydraulic unit 8 generates the hydraulic pressure to be supplied to the pipe making device 7, and drives the pipe making device 7 by the hydraulic pressure.

As shown in FIGS. 3, 4, 7, and 8, the strip 11 is made of, for example, hard vinyl chloride, and has a long and thin flat strip 14, and the length of the strip 14. The fitting recess 16 of the one side end portion 15 extending in the direction X, the fitting convex portion 18 of the other side end portion 17 extending in the longitudinal direction X of the strip plate 14, and the longitudinal direction of the strip plate 14 on one surface of the strip plate 14. It includes a rib portion 20 including a plurality of ribs 19 extending to X and standing side by side at predetermined intervals L1 in the lateral direction (both end portions direction) Y of the strip 14. As shown in FIG. 3, the plurality of ribs 19 are, for example, 11 and are formed at a height H1 and a predetermined interval L1. The number of ribs 19 can be arbitrarily set.
Further, the strip-shaped body 11 is hot-melted by superimposing and crimping one side end portion 15 and the other side end portion 17 of the strip plates 14 adjacent to each other in the vicinity of the fitting convex portion 18 on one surface of the strip plate 14. 21 is provided.
Further, as shown in FIG. 3, the strip-shaped body 11 is provided with a one-side end connecting protrusion 22 near the fitting recess 16 of the one-side end portion 15, and the fitting convex portion 18 of the other side end portion 17. The nearby rib 19 is provided with the other side end connecting protrusion 23 which is connected to the one side end connecting protrusion 22 adjacent to each other.
In the pipe making device 7, when the strip 11 is continuously wound in a spiral shape, one surface of the strip 14 is arranged as an outer peripheral surface toward the outside, and the strip 11 is adjacent to each other. The fitting recess 16 and the fitting protrusion 18 are fitted and connected.
As shown in FIG. 8, the rib 19 includes a strut portion 24 rising from the strip 14, and a flange portion 25 extending in a direction orthogonal to the strut portion 24 as a tip portion of the strut portion 24. Further, a gap 26 having a width W2 and a height H2 is formed between the adjacent ribs 19 and 19.
In the pipe structure 5, the strip 14 is spirally wound so as to be outward, and the tip surface of the flange portion 25, which is the tip of the plurality of ribs 19, is the existing pipe 1. It is placed in contact with the inner peripheral surface.

Further, as shown in FIG. 4, the pipe making device 7 is provided with an adhesive nozzle 27 constituting an adhesive automatic feeder (not shown). The adhesive B discharged from the adhesive nozzle 27 is wound around and firmly connects the fitting recess 16 and the fitting protrusion 18 of the strips 11 adjacent to each other.

As shown in FIG. 1, the reinforcing material supply device 9 supplies the reinforcing material 28 for reinforcing the spirally wound strip-shaped body 11 to the pipe making device 7 side. The reinforcing material 28 from the reinforcing material supply device 9 is introduced into the reinforcing material engaging roller 29 arranged near the pipe making device 7, and is adjacent to the reinforcing material 28 on one surface (outward side) of the spirally wound strip-shaped body 11. It is inserted and arranged in the gap 26 between the ribs 19 and 19. In addition, in the arrangement of the reinforcing material 28, it is also possible to arrange each gap 26 or a predetermined number of gaps 26.
As shown in FIG. 8, the reinforcing material 28 is made of, for example, aluminum, is formed into a rod-shaped body having a circular cross section, and is adjacent to the rib 19 on one surface (outer side) of the band-shaped body 11 wound in a spiral shape. The gap 26 between 19 is formed to have a diameter D smaller than the width W2 and the height H2 (D <W2, D <H2). Therefore, in the state as it is, the reinforcing member 28 is in a floating state in the gap 26 between the adjacent ribs 19 and 19 of the spirally wound strip-shaped body 11, and is in a state of being easy to move. It may not fit in a fixed position.

Therefore, in the first embodiment, as shown in FIGS. 7 and 8, the reinforcing member 28 is provided in the gap 26 between the adjacent ribs 19 and 19 of the spirally wound strip 11 and the ribs 19 and 19. A reinforcing material holding fastener 30 for holding at a specific position P in the gap 26 between them is arranged. In the first embodiment, the specific position P is, for example, on the center C of the gap 26, and the outer peripheral surface of the reinforcing member 28 is in contact with the strip 14 of the strip 11. The position of the state. The specific position P can be changed in various ways.
As shown in FIG. 6, the reinforcing material holding fastener 30 is, for example, a thin plate material formed into a U-shaped cross section, and the reinforcing material 28 is brought into contact with the outer peripheral surface of the reinforcing material 28 at the central portion. The holding portion 31 to be pressed, the pair of rising portions 32 and 32 rising so as to spread from both side ends of the holding portion 31, and the tip portions of the ribs 19 and 19 continuously adjacent to the pair of rising portions 32 and 32. It is provided with a pair of fastening portions 33 and 33 to be fastened to the flange portions 25 and 25, and is formed to have a predetermined length K. The rising portion 32 is formed at a height H3 smaller than the height H2 of the gap 26.
In the first embodiment, the engagement portion 33 is formed so as to sandwich the side end portion of the collar portion 25, and is formed by projecting from the rising portion 32 to a pair of engagement projections 34 and 34 and the tip of the collar portion 25. It consists of a pair of engagement tip pieces 35 and 35 formed at the site.
The reinforcing material holding fastener 30 is formed so that the width W3 of the holding portion 31 is smaller than the width W2 of the gap 26 between the adjacent ribs 19 and 19, and is arranged in the gap 26 between the adjacent ribs 19 and 19. Before this, the width W4 between the pair of engaging portions 33 and 33 is formed larger than the width W3 of the holding portion 31.
As a result, in the reinforcing material holding fastener 30, the pair of rising portions 32 and 32 is narrowed (indicated by the arrow of the alternate long and short dash line in FIG. 6), and the width W4 between the pair of engaging portions 33 and 33 is held. When the width of the portion 31 is reduced to substantially the same as the width W3 (shown in FIGS. 7 and 8), an elastic restoring force is generated on the pair of rising portions 32 and 32, and the elastic restoring force causes a pair of engagement. The attachment portions 33 and 33 are engaged to the side surface portions of the flange portions 25 and 25 of the adjacent ribs 19 and 19.
As shown in FIG. 6, the reinforcing material holding fastener 30 is formed to have a predetermined length K and is arranged at a predetermined space in the reinforcing material 28 in the gap 26 between the adjacent ribs 19 and 19, and the reinforcing material 28 is arranged. Is held at a specific position P for each winding.
The reinforcing material holding fastener 30 is inserted when the reinforcing material 28 is inserted into the gap 26 between the adjacent ribs 19 and 19 of the spirally wound strip-shaped body 14, or when the reinforcing material 28 is inserted. It is possible to place it after it has been done.

As shown in FIG. 2, the filler supply device 10 supplies the filler 36 between the inner peripheral surface of the existing pipe 1 and the strip 11, and includes the filler nozzle 37. The filler 36 is made of, for example, concrete or an adhesive.

Hereinafter, the pipe rehabilitation method according to the first embodiment will be described.
In the implementation of the pipe rehabilitation method, the strip 11 from the strip supply device 6 is supplied to the pipe making cage 13 of the pipe making device 7 in the underground space 4 via the manhole 3, and the strip 11 is the pipe making cage. It is spirally wound by 13 to make a tube.
Then, the reinforcing member 28 is inserted and arranged in the gap 26 between the adjacent ribs 19 and 19, and the reinforcing member 28 is pressed toward the strip 14 side in the gap 26 to be held at the specific position P. The reinforcing material holding fastener 30 is inserted and arranged.
Further, the tip surface of the flange portion 25, which is the tip end portion of the plurality of ribs 19, is in contact with the inner peripheral surface of the existing pipe 1, and the filler 36 is placed between the inner peripheral surface of the existing pipe 1 and the strip 11. It is filled to form a pipe structure (rehabilitation pipe) 5.
As a result, in the first embodiment, as shown in FIG. 8, the reinforcing material holding fastener 30 for holding the reinforcing material 28 at the specific position P is adjacent to the spirally wound strip-shaped body 11. Since it is arranged in the gap 26 between the ribs 19 and 19, the reinforcing material 28 is arranged in the same state at the specific position P for each winding in the spiral gap 26 between the adjacent ribs 19 and 19, and the strip-shaped body is formed. The strength of 11 can be maintained high, whereby the strength of the tubular structure 5 can be prevented from decreasing.

9 to 11 show Example 2 of the present invention.
In the following examples, the parts that perform the same functions as those in the above-described first embodiment will be described with the same reference numerals.
The features of the second embodiment are as follows. That is, as shown in FIGS. 9 to 11, the reinforcing material holding fastener 30 has a holding portion 31 that contacts the outer peripheral surface of the reinforcing material 28 at the central portion and presses the reinforcing material 28, and both end portions of the holding portion 31. A pair of rising portions 32 and 32 that rise from the portion and a pair that are engaged to the lower surface of the flange portions 25 and 25 that are the tips of the ribs 19 and 19 that are continuously adjacent to the pair of rising portions 32 and 32. A pair of anchoring projecting pieces 41 and 41 as the engaging portions 33 and 33 of the above are provided.
According to the structure of the second embodiment, the same effect as that of the first embodiment is obtained, and since the fastening portion 33 is only the fastening protrusion 41, the structure of the reinforcing material holding fastener 30 can be simplified. Can be planned.

FIG. 12 shows Example 3 of the present invention.
The features of this Example 3 are as follows. That is, for example, in the reinforcing material holding fastener 30 according to the second embodiment described above, a pair of abutments protruding so as to be in contact with adjacent ribs 19 and 19 at an intermediate portion in the middle of the pair of rising portions 32 and 32. Parts 51 and 51 were formed.
According to the structure of the third embodiment, the pair of contact portions 51.51 at the intermediate portion between the flange portions 25/25 of the ribs 19/19 and the pair of rising portions 32.32 to which the reinforcing material holding fastener 30 is adjacent. Since it is supported in contact with the reinforcing member 28, the holding of the reinforcing member 28 can be made more solid.

FIG. 13 shows Example 4 of the present invention.
The features of this Example 4 are as follows. That is, two reinforcing members 28 and 28 are arranged in the gap 26 between the adjacent ribs 19 and 19.
In this case, one reinforcing member 28 is arranged at a corner portion between the strut portion 24 of one rib 19 and the band 14 as a specific position P, and the other reinforcing member 28 is arranged with the strut portion 24 of the other rib 19 and the band. The corner portion with the body 14 is arranged as the specific position P.
Then, the reinforcing material holding fastener 30 includes a holding portion 61 that simultaneously presses the two reinforcing materials 28 and 28, and a rising portion 62 and 62 that rises from both side ends of the holding portion 61 and generates an elastic restoring force. It is composed of a pair of engagement projecting pieces 63 and 63 as a pair of engagement portions 33 and 33 that are attached to the lower surfaces of the flange portions 25 and 25 of the adjacent ribs 19 and 19.
According to the structure of the fourth embodiment, even when the two reinforcing members 28 and 28 are arranged in the gap 26 between the adjacent ribs 19 and 19, the two reinforcing members 28 and 28 are placed at the specific positions P and P. It can be held at the same time, and it can have a simple structure.

FIG. 14 shows Example 5 of the present invention.
The features of Example 5 are as follows. That is, the reinforcing material holding fastener 30 is composed of a holding portion 71 as a bottom, a pair of rising portions 72 and 72, and a pair of engaging portions 73 and 73, and holds the reinforcing material 28 in the internal space 74. It is held by the unit 71.
Therefore, the bent portion 75 on the engaging portion 73/73 side is fixed to the rising portion 72/72 of the reinforcing material holding fastener 30 so as to hold and fix the reinforcing member 28 between the reinforcing member 28 and the holding portion 71. Support portions 77 and 77 are formed so that the tip portions 76 and 76 are inclined from 75 toward the center side of the holding portion 71. The support portions 77 and 77 are formed by making a U-shaped cut in the rising portion 72 and 72, and the tip portions 76 and 76 are directed toward the internal space 74 with the bent portion 75 and 75 having no cut as the center. Arranged at an angle. The tip portions 76 and 76 abut on the outer surface of the reinforcing member 28 to fix the reinforcing member 28 to the holding portion 71. The width of the internal space 74 near the holding portion 71 is set to be substantially the same as the diameter of the reinforcing member 28 or slightly larger than the diameter of the reinforcing member 28. Therefore, the specific position P of the reinforcing member 28 is on the holding portion 71 in the internal space 74.
According to the structure of the fifth embodiment, in the internal space 74 of the reinforcing material holding fastener 30, the reinforcing material 28 is firmly held by being sandwiched between the holding portion 71 and the tip portions 76 and 76 of the supporting portions 77 and 77. be able to.

The pipe structure of the pipe rehabilitation method according to the present invention can be applied not only to existing pipes but also to various other pipes.

1 Existing pipe 2 Ground 3 Manhole 4 Underground space 5 Pipe structure (rehabilitation pipe)
6 Band-shaped body supply device 7 Pipe-making device 8 Hydraulic unit 9 Reinforcing material supply device 10 Filler material supply device 11 Band-shaped body (strip)
12 Pipe making machine 13 Pipe making cage 14 Band plate 15 One side end of band plate 16 Fitting recess 17 Other side end of band plate 18 Fitting convex part 19 Rib 20 Rib part 21 Hot melt 22 One side end connection protrusion Part 23 Other side end connection protrusion 24 Rib strut 25 Rib collar (tip)
26 Gap between adjacent ribs 27 Adhesive nozzle 28 Reinforcing material 29 Reinforcing material engaging roller 30 Reinforcing material holding fastener 31 Reinforcing material holding fastener holding part 32 Reinforcing material holding fastener rising edge 33 Reinforcing material Engagement part of holding fastener 34 Engagement protrusion of the engagement part 35 Engagement tip piece of the engagement part 36 Filler 37 Filler nozzle B Adhesive

Claims (2)

The strip is formed by a long strip, a fitting recess on one side of the strip extending in the longitudinal direction, a fitting protrusion on the other end extending in the longitudinal direction of the strip, and one surface of the strip. A strip-shaped body including rib portions formed of a plurality of ribs extending in the longitudinal direction of the plate and standing side by side in the lateral direction of the strip plate at predetermined intervals is provided, and the strip-shaped body is continuously wound in a spiral shape. The fitting concave portion and the fitting convex portion that are rotated and adjacent to each other are fitted to connect the strip-shaped body, and the gap between the ribs adjacent to each other on the outer peripheral surface of the spirally wound strip-shaped body. The tip portions of the plurality of ribs of the spirally wound strip-shaped body are arranged in contact with the inner peripheral surface of the existing pipe, and the spirally wound strip-shaped body is provided. In the pipe structure of the pipe rehabilitation method, which is formed by filling a filler between the body and the existing pipe.
The gap between the adjacent ribs is provided with a reinforcing material holding fastener for holding the reinforcing material in a specific position .
The reinforcing material holding fastener is
The holding part, which is the bottom,
A pair of rising parts that rise from the holding portion with a separation width substantially the same as the diameter of the reinforcing material.
It has a pair of engaging portions that are engaged to the tips of the adjacent ribs.
The rising portion is provided with a support portion extending to the opposite rising portion side.
While accommodating the reinforcing material in the internal space between the pair of rising parts, the reinforcing material is held at a specific position by the pair of rising parts, the holding portion, and the supporting portion .
Pipe structure of pipe rehabilitation method. The support portion is formed by making a U-shaped cut in the rising portion, and is bent by a bent portion having no break so as to be inclined so as to narrow toward the center side of the holding portion. Characterized by that
The pipe structure of the pipe rehabilitation method according to claim 1.

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