WO2019171801A1

WO2019171801A1 - Spacer for positional adjustment of a renewal pipe, and pipe renewal method employing same

Info

Publication number: WO2019171801A1
Application number: PCT/JP2019/002039
Authority: WO
Inventors: 神山　隆夫; 長谷川　武司; 史孝本田
Original assignee: 株式会社湘南合成樹脂製作所
Priority date: 2018-03-05
Filing date: 2019-01-23
Publication date: 2019-09-12
Also published as: KR20200128034A; JP7260185B2; JPWO2019171801A1; TW201942509A

Abstract

A plurality of spacers 50, 70 in which first and second wedge-shaped members are overlaid are disposed around the entire circumference between a renewal pipe 40 and an existing pipe 21 with a thickness corresponding to a gap between the renewal pipe and the existing pipe. The first wedge-shaped members of the spacers 70 disposed at the bottom of the renewal pipe or in the vicinity of the bottom of the renewal pipe are held by a holding member attached to a segment 1 of the renewal pipe, in such a way as to be capable of sliding in the length direction of the pipe. The first wedge-shaped members are held by the holding member in such a way that movement in a direction orthogonal to the length direction and the circumferential direction of the pipe is restricted, preventing the first wedge-shaped members from falling out from the segment under their own weight.

Description

Repositioned pipe position adjusting spacer and pipe rehabilitation method using the same

The present invention is for adjusting the position of a rehabilitation pipe that is inserted into a gap between an existing pipe and a rehabilitation pipe assembled by connecting segments in the existing pipe in the circumferential direction and the pipe length direction, and adjusting the position of the rehabilitation pipe relative to the existing pipe. The present invention relates to a spacer and a pipe rehabilitation method using the spacer.

When a large-diameter existing pipe such as a sewer pipe buried in the ground becomes obsolete, a repair method that repairs the pipeline by lining the inner peripheral surface without digging the existing pipe from the ground is practical It has become. In such a construction method, the above-described segments are connected in the circumferential direction to assemble a pipe unit, the pipe unit is connected in the pipe length direction via a connecting member, and a rehabilitated pipe is assembled in the pipe line. After the rehabilitation pipe is assembled in the existing pipe, a composite pipe is constructed by filling and hardening a filler such as grout between the existing pipe and the rehabilitation pipe.

In such a construction method, when the filler is injected between the existing pipe and the rehabilitated pipe, the rehabilitated pipe is made of a plastic material, so that the specific gravity is smaller than that of the filler and floats on the filler. In order to prevent this, every time the rehabilitation pipe is assembled to a predetermined length (for example, about 1 m), a spacer as described in Patent Document 1 below is inserted between the existing pipe and the rehabilitation pipe, and the rehabilitation pipe is moved downward. The filling material is injected by pressing and adjusting the position of the rehabilitation pipe.

In addition, the filler injected between the existing pipe and the rehabilitation pipe is large in the upper part of the rehabilitation pipe, and the rehabilitation pipe is pressed downward by the spacer described above, so that the filler is injected at the bottom of the rehabilitation pipe. It becomes difficult. Therefore, the layer thickness of the filler varies in the circumferential direction of the rehabilitation pipe, and the rehabilitation pipe may be subjected to different external pressures in the circumferential direction due to the filler and may be deformed. In order to prevent deformation of the rehabilitation pipe, as shown in Patent Documents 2 and 3 below, a support work is assembled inside the rehabilitation pipe.

In addition, a holding member is fixed to the segment so that the spacer inserted between the existing pipe and the rehabilitation pipe does not fall from the segment, and the spacer is held by the holding member (Patent Document 4 below). .

JP 2005-265070 A JP-A-7-268853 JP 2015-24561 A JP 2017-25976 A

However, it is often difficult for an operator to enter the rehabilitation pipe, and it is difficult to assemble a support work in the rehabilitation pipe. In addition, after the filler has hardened, there is a problem that the support work must be disassembled and removed from the rehabilitation pipe.

In addition, by inserting a spacer between the existing pipe and the rehabilitation pipe in the lower part of the existing pipe to form a gap all around the existing pipe and the rehabilitation pipe, and then injecting a filler there It may be possible to increase the strength of the rehabilitation pipe and to omit the work of assembling the support in the rehabilitation pipe. However, it is often difficult to secure a gap with a predetermined thickness by inserting a spacer in the bottom or near the bottom of the existing pipe and the rehabilitation pipe.

The present invention was made in order to solve such problems, and it is possible to inject a filler over the entire circumference by inserting a spacer into the bottom or near the bottom of the existing pipe and the renovated pipe, It is an object of the present invention to provide a spacer for adjusting the position of a rehabilitating pipe that can prevent the rehabilitation pipe from being deformed without reassembling the rehabilitation pipe and to rehabilitate the existing pipe, and a pipe rehabilitation method using the rehabilitation pipe.

The present invention (Claim 1)
A spacer for adjusting the position of a rehabilitation pipe inserted into a gap between the existing pipe and a rehabilitation pipe assembled by connecting segments in the circumferential direction and the pipe length direction in the existing pipe and adjusting the position of the rehabilitation pipe with respect to the existing pipe. ,
A first wedge having a side wall formed so as to be slidably held in the tube length direction by being fitted in a guide groove of a holding member fixed to the segment, and having a locking tooth on an inclined surface inclined at a predetermined angle A member,
The first wedge-shaped member has an inclined surface inclined at the same angle as that of the first wedge-shaped member, and is movable in the insertion direction with respect to the first wedge-shaped member and not movable in the opposite direction. A locking tooth that engages with the locking tooth of the wedge-shaped member has a second wedge-shaped member formed on the inclined surface,
The first and second wedge-shaped members are stacked with the inclined surfaces aligned so that the respective locking teeth engage with each other,
A convex portion or a concave portion extending in the tube length direction is formed on the side wall surface of the first wedge-shaped member, and the convex groove or concave portion of the side wall surface is fitted into the guide groove surface of the holding member facing the side wall surface. A concave portion or a convex portion is formed, and movement of the first wedge-shaped member in a direction orthogonal to the pipe length direction and the circumferential direction is limited by the concave-convex fitting.

The present invention (Claim 5)
A pipe rehabilitation method in which segments are connected in the circumferential direction and pipe length direction, and a rehabilitation pipe is laid in an existing pipe,
Holding a first wedge-shaped member having locking teeth formed on an inclined surface inclined at a predetermined angle on a holding member fixed to the segment;
The first wedge-shaped member has an inclined surface inclined at the same angle as that of the first wedge-shaped member, and is movable in the insertion direction with respect to the first wedge-shaped member and not movable in the opposite direction. A second wedge-shaped member having a locking tooth that engages with a locking tooth of the wedge-shaped member is formed on the inclined surface, and is superimposed on the first wedge-shaped member so that the respective locking teeth engage with each other. Inserting the gap between the existing pipe and the rehabilitation pipe,
By moving the second wedge-shaped member in the insertion direction with respect to the first wedge-shaped member, the thickness of the entire spacer in which the first and second wedge-shaped members are overlapped increases stepwise. Adjusting, and
And a step of injecting a filler between the rehabilitation pipe and the existing pipe,
The spacers that overlap the first and second wedge-shaped members are inserted at a plurality of positions so that a gap is generated over the entire circumference between the rehabilitation pipe and the existing pipe,
The holding member for holding the first wedge-shaped member of the spacer arranged at the bottom of the rehabilitated tube or in the vicinity of the bottom is fitted to the side wall of the first wedge-shaped member so that the first wedge-shaped member is connected to the tube length. A guide groove is formed to hold it slidable in the direction,
A convex portion or a concave portion extending in the tube length direction is formed on the side wall surface of the first wedge-shaped member slidably held in the guide groove, and the side wall surface is formed on the guide groove surface facing the side wall surface. A concave portion or a convex portion is formed to be concavo-convex with the convex portion or concave portion of the dent, and movement of the first wedge-shaped member in a direction perpendicular to the pipe length direction and the circumferential direction is limited by the concave-convex fitting. To do.

According to the present invention, since the first wedge-shaped member of the spacer is held so as to be slidable in the tube length direction, the first wedge-shaped member is held so as to protrude outside the rehabilitation tube and is slid inside. Can do. Therefore, it becomes easy to install the rehabilitation pipe so that the first wedge-shaped member protrudes from the bottom of the rehabilitation pipe or near the bottom using the protruding first wedge-shaped member as a mark. Further, since the first wedge-shaped member is restricted from moving in the direction perpendicular to the pipe length direction and the circumferential direction, even if the first wedge-shaped member comes near the bottom or the bottom of the rehabilitation pipe, It is easy to form a gap with the existing pipe by installing a spacer near the bottom or near the bottom of the rehabilitation pipe. Therefore, a gap can be formed over the entire circumference between the rehabilitation pipe and the existing pipe, and the existing pipe can be renewed by injecting the filler between the rehabilitation pipe and the existing pipe over the entire circumference. It becomes possible.

It is the perspective view which showed the structure of the segment used for the assembly of a rehabilitation pipe | tube. It is a perspective view which shows the state which connected the segment to the circumferential direction and assembled the pipe unit. It is explanatory drawing which showed the state which connects the segment of a pipe unit in a pipe length direction using a connection member. It is explanatory drawing which shows the state which lays a renovated pipe in an existing pipe. It is sectional drawing which shows a mode that a filler is inject | poured into the clearance gap between the outer periphery of a renovated pipe, and the inner wall face of an existing pipe. It is a perspective view which shows the structure of the 1st wedge-shaped member of the spacer inserted in the upper part of a rehabilitation pipe | tube. It is a perspective view which shows the structure of the 2nd wedge-shaped member of the spacer inserted in the upper part of a rehabilitation pipe | tube. It is explanatory drawing which showed the state which moves the 2nd wedge-shaped member of the spacer inserted in the upper part of a rehabilitation pipe | tube, and adjusts the thickness of the whole spacer. It is the perspective view which showed the state which attaches the spacer inserted in the upper part of a rehabilitation pipe | tube to a segment. It is a front view of the spacer holding member holding the spacer inserted in the upper part of a rehabilitation pipe | tube. It is a side view of the spacer holding member holding the spacer inserted in the upper part of a rehabilitation pipe. It is a perspective view which shows the structure of the 1st wedge-shaped member of the spacer inserted in the bottom part of a rehabilitation pipe | tube, or the bottom vicinity. It is a perspective view which shows the structure of the 2nd wedge-shaped member of the spacer inserted in the bottom part of a rehabilitation pipe | tube, or the bottom vicinity. It is explanatory drawing which showed the state which moves the 2nd wedge-shaped member of the spacer inserted in the bottom part of a rehabilitation pipe | tube, or the bottom part vicinity, and adjusts the thickness of the whole spacer. It is a perspective view of the spacer holding member holding the spacer inserted in the bottom part of a rehabilitation pipe | tube, or the bottom vicinity. It is a front view of the spacer holding member holding the spacer inserted in the bottom part of a rehabilitation pipe | tube, or the bottom vicinity. It is the perspective view which showed the state which attaches the spacer holding member holding the spacer inserted in the bottom part of the rehabilitation pipe | tube to the bottom part vicinity to a segment. It is the perspective view which showed the state which slides in the insertion direction the spacer inserted in the bottom part of a rehabilitation pipe | tube, or the bottom vicinity. FIG. 15 is a cross-sectional view taken along the line AA in FIG. 14 showing a state in which the first wedge-shaped member of the spacer inserted in the bottom portion or near the bottom portion of the rehabilitation pipe is held by the holding member. It is explanatory drawing which showed the process of inserting a spacer in the bottom part of a rehabilitation pipe | tube. It is explanatory drawing which shows the state which inserted the spacer in the uppermost part and bottom part of a rehabilitation pipe | tube. It is sectional drawing which shows the other Example of uneven | corrugated fitting of the side wall surface of a 1st wedge-shaped member, and the guide groove surface of a holding member. It is sectional drawing which shows the further another Example of the uneven | corrugated fitting of the side wall surface of a 1st wedge-shaped member, and the guide groove surface of a holding member.

Hereinafter, the present invention will be described based on examples shown in the accompanying drawings. INDUSTRIAL APPLICABILITY The present invention is suitable for rehabilitating or repairing existing large-diameter pipes such as sewer pipes, water pipes, tunnels, and agricultural waterways. In this embodiment, the rehabilitation pipe is described as having a circular cross-sectional shape perpendicular to the pipe length direction, but it is needless to say that the present invention can also be applied to rehabilitation pipes having shapes other than circular.

FIG. 1 shows the structure of a rehabilitation pipe segment 1 (hereinafter simply referred to as a segment). The segment 1 includes an inner surface plate 101 constituting the inner peripheral surface of the rehabilitated pipe,

side plates

102 and 103 having the same shape vertically arranged on both sides extending in the circumferential direction of the inner surface plate 101, and the tube length direction of the inner surface plate 101. An integrally molded block-shaped member made of plastic comprising

end plates

104, 105 having the same shape vertically extending at both ends extending in the same direction and

inner plates

106, 107 having the same shape standing at equal intervals. It is.

In this embodiment, the segment 1 has a shape that is curved into a predetermined angle that divides the circumference into a plurality of equal parts, for example, an arc of 60 degrees that divides the circumference into six parts. However, the segment is not limited to an arc shape or a fan shape, and should be a rectangular parallelepiped or a shape that is rounded and bent at right angles according to the cross-sectional shape of the existing pipe, its size, or the repair location of the existing pipe. You can also.

The

side plates

102 and 103 and the inner plate 106 have

circular insertion holes

102a, 103a and 106a for passing through the connecting member 11 configured as bolts and nuts 12 (FIG. 3) for connecting the segment 1 in the tube length direction. A plurality are formed at equal intervals in the circumferential direction. A plurality of notches 107a into which the connecting member 11 can be inserted are also formed in the internal plate 107 at equal intervals.

The

end plates

104 and 105 are formed with a plurality of

circular insertion holes

104a and 105a for passing connection members such as bolts connecting the segments 1 in the circumferential direction. The segment abuts the end plate 105 of the other segment and the end plate 104 of the other segment, and inserts the bolt 6 and the nut 7 through the work holes 102b and 103b formed in the

side plates

102 and 103, and the bolt 6 and the nut 7 are inserted. It can be connected in the circumferential direction by screwing (FIG. 3).

In addition, a plurality of

notches

102c, 103c, 106b for allowing a filler to be described later to pass therethrough are formed at the upper edges of the

side plates

102, 103 and the inner plate 106, and the circumferential positions of the notches 106b formed in the inner plate 106 Is different from the circumferential positions of the

notches

102c, 103c formed in the

side plates

102, 103.

When the segments are sequentially connected in one circumferential direction, a ring-shaped tube unit 10 as shown in FIG. 2 can be assembled. The tube unit 10 has a shape obtained when a circular tube is cut into a ring with a predetermined width D perpendicular to the tube length direction X, and its outer diameter is a little smaller than the inner diameter of an existing tube to be rehabilitated. Yes. The segment corresponds to a member obtained when the tube unit 10 is divided into a plurality (preferably equally divided) in the circumferential direction C along the cut surface along the radial direction R.

In FIG. 2, the inner surface plate 101, the

side plates

102 and 103, and the

end plates

104 and 105, which are the main structural members of the segment 1, are illustrated, and the reinforcing structures such as the

inner plates

106 and 107 avoid complexity. Therefore, illustration is omitted.

As shown in FIG. 3, a plurality of nuts 12 are fixed to each segment of the tube unit 10 using bolts 13. For example, when connecting the segment 1a to the segment 1b in the tube length direction, a connecting member 11 is used in which a threaded portion 11a that is screwed with a nut 12 is formed at one end and a head 14 having a collar 14a is fixed at the other end. . The

side plates

103 and 102 of both segments 1a and 1b are butted together, and the connecting member 11 is passed through the insertion hole 102a of the side plate 102 of the segment 1a, the insertion hole 106a of the inner plate 106, and the notch 107a of the inner plate 107, and the screw portion 11a. When screwed into the nut 12 fixed to the segment 1b, the connecting member 11 and the nut 12 are connected. When the connecting member 11 is screwed into the nut 12 until the collar 14a of the head 14 is in pressure contact with the leftmost inner plate 106 of the segment 1a, both the segments 1a and 1b are bolted and connected in the tube length direction.

In order to rehabilitate the existing pipe using the segment 1 configured as described above, first, as shown in FIG. 4, the segment 1 is carried into the existing pipe 21 through the manhole 20, and the segments are sequentially arranged in the circumferential direction. The pipe unit 10 is assembled by connecting. Subsequently, the pipe unit 10 is sequentially connected in the pipe length direction using the connecting member 11 and the nut 12 by the method shown in FIG. 3, and the renovated pipe 40 is laid in the existing pipe 21. A filler 30 such as grout is injected between the existing pipe 21 and the rehabilitation pipe 40.

In the pipe rehabilitation work, after the rehabilitation pipe 40 is laid in the existing pipe 21, as shown in FIG. 5, an injection hole 41a is drilled in the segment 1, and the injection hose 41 is used through this injection hole 41a. Filler 30 is injected into the gap between rehabilitation pipe 40 and existing pipe 21. At this time,

spacers

50 and 70 are spaced between the rehabilitation pipe 40 and the existing pipe 21 so that the filler 30 is injected between the rehabilitation pipe 40 and the existing pipe 21 with a predetermined layer thickness over the entire circumference. Arranged.

The spacer 50 is arranged in the upper part of the rehabilitation pipe 40. The first wedge-shaped member 51 whose upper surface is shown in FIG. 6a and the second wedge-shaped member 52 whose lower surface is shown in FIG. It is composed of layers. If the thickness of the spacer 50 is insufficient, the raising member 53 shown in FIG. 7 is used to increase the thickness of the spacer 50 as a whole.

In the first wedge-shaped member 51 of the spacer 50, a groove 51a is formed at the center, and a large number of locking teeth 51b are formed at a predetermined pitch along the inclined surface at the bottom. A plurality of elongated holes 51c for allowing the filler 30 to pass therethrough are formed between the groove 51a and the

side walls

51d and 51e on both sides, and a protrusion 51g is formed on the front side of the insertion.

The second wedge-shaped member 52 of the spacer 50 has an inclined surface inclined at the same angle as the inclination angle of the first wedge-shaped member 51, and a convex portion 52a fitted to the groove 51a, followed by an elastically deformable piece. 52g is formed. A plurality (for example, two) of locking teeth 52b are formed on the lower surface of the elastic deformation piece 52g at an integer multiple of the pitch of the locking teeth 51b. Each of the locking

teeth

51b and 52b has a sawtooth shape having an inclined surface and a vertical surface, and is a tooth surface that can move only in one direction when the vertical surfaces are engaged. In addition, an elongated hole 52c that is aligned with the elongated hole 51c of the first wedge-shaped member 51 is formed between the convex portion 52a and the

side walls

52d and 52e on both sides.

The first wedge-shaped member 51 is inclined at a predetermined angle (about 10 °) so that the back side in the insertion direction is higher, and the second wedge-shaped member 52 is the same as the inclination angle of the first wedge-shaped member 51. Since the reverse wedge shape is inclined at an angle, when the convex portions 52a of the second wedge-shaped member 52 are fitted and overlapped with the grooves 51a of the first wedge-shaped members inclined at the same angle, FIG. As shown in FIG. 5, the locking

teeth

51b and 52b are engaged with each other, and the lower surface 51f of the first wedge-shaped member 51 and the upper surface 52f of the second wedge-shaped member are parallel to each other.

In FIG. 7, when the second wedge-shaped member 52 is pushed in the A direction, the locking

teeth

51b and 52b move in the A direction with the inclined surfaces engaged, but the vertical surfaces engage in the opposite direction. Movement is prevented. Accordingly, by pushing the second wedge-shaped member 52 in the A direction, the thickness H of the entire spacer 50 is stepped at a small pitch corresponding to the inclination angle of the first and second wedge-shaped

members

51, 52. Can be increased. Further, since the elastic deformation piece 52g is elastically deformed, when the elastic deformation piece 52g is lifted, the engagement between the locking

teeth

51b and 52b is released. Therefore, the second wedge-shaped member 52 is moved in the direction opposite to the A direction, and the spacer 50 The thickness of can be reduced. As shown in FIG. 2, the first wedge-shaped member 51 is attached to the segment using the spacer holding member 60 described below before assembling the tube unit 10 or after assembling the tube unit 10. Keep it.

The spacer holding member 60 that holds the first wedge-shaped member 51 of the spacer 50 has

flat surfaces

60a and 60b in the tube length direction (front-rear direction), as shown in FIGS. 8, 9a, and 9b. Thus, a groove 60c having a width t1 is formed in the central portion over the entire length in the circumferential direction (left-right direction). The width t1 of the groove 60c is set to the same value as the thickness of each of the

side plates

102 and 103 and the

inner plates

106 and 107 of the segment 1. With this setting, as shown in FIG. 8, the spacer holding member 60 can be fixed to the inner plate 107 by, for example, pressing the inner plate 107 into the groove 60 c of the spacer holding member 60.

Further,

grooves

60d and 60e having a width t2 are formed at both ends of the spacer holding member 60 in the left-right direction. The width t2 of the

grooves

60d, 60e is set to the same value as the wall thickness of the

side walls

51d, 51e of the first wedge-shaped member 51, and the distance t3 between the outer surfaces of the

grooves

60d, 60e of the spacer holding member 60 is It is set equal to the lateral width of the first and second wedge-shaped

members

51 and 52. With such a setting, the first wedge-shaped member 51 can be fixed and held on the spacer holding member 60 by press-fitting the first wedge-shaped member 51 into the

grooves

60d and 60e of the spacer holding member 60. .

The spacer 50 and the spacer holding member 60 described above are used from the upper part to the center part of the rehabilitation pipe 40. The lower part of the rehabilitation pipe 40, particularly the bottom part or the vicinity of the bottom part, is shown in FIGS. 10a and 10b. A spacer 70 and a spacer holding member 80 as shown in FIGS. 12a and 12b are used.

The spacer 70 is configured by vertically stacking a first wedge-shaped member 71 whose upper surface is shown in FIG. 10a and a second wedge-shaped member 72 whose lower surface is shown in FIG. 10b. In the first wedge-shaped member 71, a groove 71a is formed at the center, and a large number of locking teeth 71b are formed at the bottom of the first wedge-shaped member 71 at a predetermined pitch on an inclined surface inclined at a predetermined angle. Further, a plurality of long holes 71c for allowing the filler 30 to pass therethrough are formed between the groove 71a and the

side walls

71d and 71e on both sides, and abuts the side plate 102 of the segment 1 on the front side in the insertion direction (tube length direction). Thus, a protrusion 71g is formed to limit the movement of the first wedge-shaped member 71 in the insertion direction. Further, on the outer wall surfaces of the

side walls

71d and 71e,

convex portions

71h and 71i projecting in the circumferential direction (left-right direction) are formed over the entire length direction (tube length direction).

The second wedge-shaped member 72 of the spacer 70 is provided with a convex portion 72a that fits into the groove 71a of the first wedge-shaped member 71, and a locking tooth 72b is formed on the inclined surface of the convex portion 72a. It is formed at a pitch that is an integral multiple of the pitch of the locking teeth 71b of the wedge-shaped member 71. Each of the locking

teeth

71b and 72b has a sawtooth shape having an inclined surface and a vertical surface, and is a tooth surface that can move only in one direction when the vertical surfaces are engaged. A plurality of elongated holes 72c for allowing the filler 30 to pass therethrough are formed between the convex portion 72a and the

side walls

72d and 72e on both sides.

The first wedge-shaped member 71 is inclined at a predetermined angle (about 2 to 5 °) so that the back side in the insertion direction is higher, and the second wedge-shaped member 72 is inclined with respect to the first wedge-shaped member 71. The first and second wedge shapes are formed by fitting the groove 71a of the first wedge-shaped member 71 with the convex portion 72a of the second wedge-shaped member 72. When the

members

71 and 72 are superposed, as shown in FIG. 11, the grooves 71a inclined at the same angle and the locking

teeth

71b and 72b formed on the convex portion 72a engage with each other, and the first wedge-shaped member The lower surface 71f of 71 and the upper surface 72f of the 2nd wedge-shaped member 72 become parallel. The width of the spacer 70 along the circumferential direction of the first and second wedge-shaped

members

71 and 72 is the same as the width t3 of the first and second wedge-shaped

members

51 and 52 of the spacer 50, respectively. ing.

Since the spacer 70 is actually disposed at the lower part of the rehabilitation pipe, for example, when the spacer 70 is disposed at the bottom, the first wedge-shaped member 71 has a second shape as illustrated in FIGS. The first wedge-shaped member 71 is shown below the second wedge-shaped member 72 in FIG. 11 in order to be arranged on the upper side of the wedge-shaped member 72 but for comparison with the spacer 50. Similarly, a spacer holding member 80 for holding a first wedge-shaped member 71, which will be described later, is also shown in FIGS. 12a, 12b, and 13 to 15 upside down with respect to the actually disposed posture. .

In FIG. 11, when the second wedge-shaped member 72 is pushed in the A direction, the locking

teeth

71b and 72b engage in the inclined surfaces and move in the A direction, but the vertical surfaces engage in the opposite direction. Movement is prevented. Accordingly, by pushing the second wedge-shaped member 72 in the A direction, the thickness h of the entire spacer 70 is stepped at a small pitch corresponding to the inclination angle of the first and second wedge-shaped

members

71, 72. Can be increased. The first wedge-shaped member 71 is divided into segments using the spacer holding member 80 before the tube unit 10 is assembled or after the tube unit 10 is assembled, similarly to the first wedge-shaped member 51 of the spacer 50. Keep it attached.

The spacer holding member 80 for holding the first wedge-shaped member 71 of the spacer 70 has

flat surfaces

80a and 80b in the tube length direction (front-rear direction) as shown in FIGS. A groove 80c having a width t1 is formed over the entire length in the circumferential direction (left-right direction). The width t1 of the groove 80c is set to the same value as the thickness of each of the

side plates

102 and 103 and the

inner plates

106 and 107 of the segment 1, similarly to the groove 60c of the spacer holding member 60. With this setting, as shown in FIG. 13, the spacer holding member 80 can be fixed to the inner plate 107 by, for example, pressing the inner plate 107 into the groove 80 c of the spacer holding member 80.

Further,

outer walls

80f and 80g are formed on both sides in the circumferential direction (left and right direction) of the spacer holding member 80, and

inner walls

80h and 80i are provided on the inner side thereof, and between the outer walls and the inner walls, the spacer 70

Guide grooves

80j and 80k are formed which are fitted with the

side walls

71d and 71e of the first wedge-shaped member 71 and slide the first wedge-shaped member 71 in the insertion direction. Further,

protrusions

80d and 80e are formed on the outer groove surfaces of the

guide grooves

80j and 80k (inner surfaces of the

outer walls

80f and 80g), and the right side guide groove surface of the guide groove 80j is formed by the bottom surface 80m and the protrusion 80d of the guide groove 80j. Is formed with a concave portion 80p that fits with the convex portion 71h of the first wedge-shaped member 71. In addition, a concave portion 80q that fits with the convex portion 71i of the first wedge-shaped member 71 is formed on the left side guide groove surface of the guide groove 80k by the bottom surface 80n of the guide groove 80k and the protrusion 80e.

As shown in FIG. 15, the circumferential width w1 of the

guide grooves

80j and 80k is the wall thickness w3 of the

side walls

71d and 71e of the first wedge-shaped member 71 of the spacer 70 and the protrusions formed on the

side walls

71d and 71e. It is slightly larger than the value (w2 + w3) obtained by adding the protrusion amounts w2 of the

portions

71h and 71i. With such setting, the

side walls

71d and 71e of the first wedge-shaped member 71 are fitted into the

guide grooves

80j and 80k of the spacer holding member 80, and the first wedge-shaped member 71 is moved along the

guide grooves

80j and 80k. Can slide back and forth in the tube length direction.

The first wedge-shaped member 71 is fitted to the holding member 80 so that the

convex portions

71h and 71i are fitted to the

concave portions

80p and 80q of the spacer holding member 80. The movement of the one wedge-shaped member 71 in the vertical direction, that is, the direction Y perpendicular to the tube length direction X and the circumferential direction C in FIG. Therefore, even if the first wedge-shaped member 71 is held upside down in FIG. 15, the first wedge-shaped member 71 is prevented from falling downward by its own weight from the spacer holding member 80.

With such a configuration, the process of inserting the spacers at a plurality of positions and constructing the rehabilitation pipe in the existing pipe so that a gap is generated over the entire circumference between the rehabilitation pipe and the existing pipe will be described.

When the tube unit 10 is connected in the tube length direction and the length of the rehabilitated tube 40 in the tube length direction is about 0.6 m, for example, as shown in FIG. Insert between tubes 40.

In this embodiment, the spacer is inserted into a plurality of positions so that a gap is generated over the entire circumference between the rehabilitated pipe and the existing pipe. Therefore, the spacer 50 is used from the upper part to the center part of the rehabilitation pipe 40, and the spacer 70 is used at the bottom part of the rehabilitation pipe 40 or the lower part near the bottom part. Before assembling the tube unit 10 or after assembling the tube unit 10, the

spacer holding member

60 or 80 is fixed to the inner plate 107 of the segment at the spacer insertion position, and the first wedge-shaped member of the spacer 50 is fixed there. 51 or the first wedge-shaped member 71 of the spacer 70 is held.

First, in order to lift the bottom of the rehabilitation pipe 40 from the existing pipe 21, the first spacer is inserted into the bottom of the rehabilitation pipe. The first wedge-shaped member 71 of the spacer 70 inserted into the bottom portion of the rehabilitation pipe is projected to the outside from the segment 1 of the rehabilitation pipe 40 into which the spacer is inserted, as shown in the uppermost part of FIG. It is held by the holding member 80. By holding in this way, the rehabilitating tube 40 is already installed so that the first wedge-shaped member 71 comes to the bottom of the rehabilitating tube 40 with the first wedge-shaped member 71 protruding from the segment 1 as a mark. It becomes easy to install in the tube 21.

Thus, even if the first wedge-shaped member 71 is held so as to protrude from the outside of the segment 1, the first wedge-shaped member 71 can be slid in the tube length direction, as shown in the lowermost stage of FIG. Since it can be moved until it finally comes into contact with the side plate 102 of the segment 1, the inserted first wedge-shaped member 71 does not collide with the next connected segment.

Further, as illustrated in the first stage of FIG. 16, even if the first wedge-shaped member 71 is moved so as to come to the bottom of the rehabilitation pipe 40, the convex portion 71 h on the side wall of the first wedge-shaped member 71, The first wedge-shaped member 71 moves in the direction Y (vertical direction in the figure) perpendicular to the tube length direction X and the circumferential direction C by the concave / convex fitting of the

recesses

80p and 80q of the guide groove of 71i and the spacer holding member 80. Therefore, the first wedge-shaped member is prevented from falling from the segment 1 (see the cross-sectional views in the first phantom line in FIGS. 15 and 16).

Subsequently, as shown in the second row of FIG. 16, the first wedge-shaped member 71 is formed by aligning the inclined surface of the second wedge-shaped member 72 with the inclined surface of the first wedge-shaped member 71. Is pushed into the gap between the existing pipe 21 using a bar, a rubber hammer or the like, and the second wedge-shaped member 72 is replaced with the first and second wedge-shaped members 71, as shown in the third row of FIG. Slide in the direction of arrow A until the thickness of the entire spacer 70 overlaid with 72 becomes the desired thickness h1.

Subsequently, as shown in the bottom of FIG. 16 and FIG. 17, the first wedge-shaped member 71 is simultaneously moved in the B direction and the second wedge-shaped member 72 is moved in the A direction using a bar, a rubber hammer, or the like. Let This movement is performed until the projection 71g of the first wedge-shaped member 71 comes into contact with a recess 102d (not shown in FIG. 1) formed in the side plate 102 of the segment 1. Since the projection 71g contacts the recess 102d formed on the side plate 102 of the segment 1, the first wedge-shaped member 71 is restricted from moving further in the tube length direction. Further, since the projection 71g enters the recess 103d of the side plate 103 of the segment to be connected next, it is prevented from colliding with the segment to be connected next. The length L in the tube length direction of the first and second wedge-shaped

members

71 and 72 is set longer than the length D of the segment 1 in the tube length direction. Therefore, since the spacer 70 extends in the tube length direction to the entire bottom of the segment to support the segment, the rehabilitation tube can be prevented from being deformed.

In this way, since the spacer 70 is inserted into the bottom of the rehabilitating tube 40, as shown in FIG. 5, the spacer 70 is also inserted in the vicinity of the bottom of the rehabilitating tube 40 in the same manner as that inserted into the bottom. insert. In that case, since the gap with the existing pipe 21 becomes larger as it goes upward, the second wedge-shaped member 72 is moved further inside than shown in the lowermost stage of FIG.

Subsequently, as shown in FIG. 5, the spacer 50 is inserted into the gap between the rehabilitation pipe 40 and the existing pipe 21 at a circumferential interval from the vicinity of the center of the rehabilitation pipe 40 to the upper part thereof. Adjust the thickness.

Since the spacer 50 inserted in the upper part of the rehabilitation pipe is less likely to fall even if the second wedge-shaped member 52 is overlapped with the first wedge-shaped member 51, the first and second wedge-shaped members The first wedge-shaped member 51 is held on the spacer holding member 60 by superimposing 51 and 52.

As shown in FIG. 7, the thickness of the entire spacer 50 is adjusted by pushing the second wedge-shaped member 52 of the spacer 50 in the insertion direction. FIG. 17 shows a spacer 50 inserted at the top of the rehabilitation tube, along with a spacer 70 inserted at the bottom.

Since the second wedge-shaped member 52 of the spacer 50 is provided with an elastic deformation piece 52g, by lifting it, the engagement of the locking teeth is disengaged and the second wedge-shaped member 52 is opposite to the insertion direction. The thickness of the spacer 50 can be decreased by moving in the direction. Therefore, by increasing or decreasing the thickness of the spacer 50, a plurality of spacers are arranged at predetermined intervals with a thickness corresponding to the gap between the rehabilitated pipe and the existing pipe between the rehabilitated pipe and the existing pipe. be able to.

When the rehabilitation tube 40 is assembled to a desired length (for example, about 5 m), an injection hole 41a is drilled in the segment 1 at one end of the rehabilitation tube 40 as shown in FIG. Then, the filler 30 is injected into the gap between the rehabilitation pipe 40 and the existing pipe 21 using the injection hose 41. Furthermore, when extending the rehabilitation pipe 40, as described above, each time the rehabilitation pipe 40 is assembled by about 0.6 m, the

spacers

50 and 70 are inserted between the existing pipe 21 and the rehabilitation pipe 40 and about 5 m is inserted. Once assembled, the process of injecting filler 30 is repeated.

The filler 30 includes

insertion holes

102a, 103a, 106a formed in the

side plates

102, 103 and the

inner plates

106, 107, a notch 107a, and a notch 102c formed in the upper edges of the

side plates

102, 103 and the inner plate 106, It flows also through 103 c and 106 b, and also flows into the

long holes

51 c and 52 c formed in the spacer 50 and the

long holes

71 c and 72 c formed in the spacer 70. Further, since the circumferential position of the notch 106b formed on the upper edge of the inner plate 106 is different from the circumferential position of the

notches

102c and 103c formed on the upper edge of the

side plates

102 and 103, the filler 30 can meanderly flow over the top of the segment, making the injection of filler 30 uniform. After the filler 30 is hardened, a solid composite pipe composed of the existing pipe 21, the filler 30, and the rehabilitated pipe 40 is constructed.

In this embodiment, a plurality of spacers are arranged at a thickness corresponding to the gap between the rehabilitated pipe and the existing pipe at a predetermined interval over the entire circumference between the rehabilitated pipe and the existing pipe so that the rehabilitated pipe does not deform. Is done. Therefore, the rehabilitation pipe is firmly held by the spacer on the entire circumference, and the deformation of the rehabilitation pipe by the injected filler is prevented by the spacer arranged at the corresponding place. As described above, since the supporter has a function of preventing the rehabilitation pipe from being deformed by the spacer, it is not necessary to assemble the supporter in the rehabilitation pipe, and the pipe rehabilitation work can be performed efficiently.

In addition, the arrangement position of the spacers, the number of spacers to be used, and the types thereof are not limited to the above-described embodiments. Further, the number of spacers can be increased or decreased, and the spacers can be arranged at equal intervals in the circumferential direction, or can be arranged by changing the density.

Further, in the above-described embodiment, the

convex portions

71h and 71i are provided on the outer wall surfaces of the

side walls

71d and 71e of the first wedge-shaped member 71 of the spacer 70, and the surfaces of the

guide grooves

80j and 80k of the spacer holding member 80 opposed thereto. The

concave portions

80p and 80q are provided in the concave and convex portions, and as shown in FIG. 18A, the

concave portions

71r and 71s are provided on the outer wall surfaces of the

side walls

71d and 71e, and the

convex grooves

80j and 80k are opposed to the convex surfaces. The

portions

80r and 80s may be provided so that the concave and convex portions are fitted. Alternatively, as shown in FIG. 18b, convex portions 71u and 71v are provided on the inner wall surfaces of the

side walls

71d and 71e, and

concave portions

80u and 80v are provided on the surfaces of the

guide grooves

80j and 80k opposite to the convex portions 71u and 71v. May be. Further, in FIG. 18b, the concave portion may be provided on the inner wall surface, and the convex portion may be provided on the guide groove surface facing the concave portion.

1 segment 10 pipe unit 21 existing pipe 30 filler 40 rehabilitation pipe 50 spacer 51 first wedge-shaped member 51b locking tooth 52 second wedge-shaped member 52b locking tooth 52g elastic deformation piece 53 raising member 60 spacer holding member 70 Spacer 71 First wedge-shaped member

71b Locking tooth

71d, 71e Side wall 71g Projection 71h, 71i Convex part 72 Second wedge-shaped member

72b Locking tooth

72d, 72e Side wall 80

Spacer holding member

80d,

80e Projection

80f,

80g Outer wall

80h,

80i Inner wall

80j,

80k Guide groove

80p, 80q Recess

Claims

A spacer for adjusting the position of a rehabilitation pipe inserted into a gap between the existing pipe and a rehabilitation pipe assembled by connecting segments in the circumferential direction and the pipe length direction in the existing pipe and adjusting the position of the rehabilitation pipe with respect to the existing pipe. ,
A first wedge having a side wall formed so as to be slidably held in the tube length direction by being fitted in a guide groove of a holding member fixed to the segment, and having a locking tooth on an inclined surface inclined at a predetermined angle A member,
The first wedge-shaped member has an inclined surface inclined at the same angle as that of the first wedge-shaped member, and is movable in the insertion direction with respect to the first wedge-shaped member and not movable in the opposite direction. A locking tooth that engages with the locking tooth of the wedge-shaped member has a second wedge-shaped member formed on the inclined surface,
The first and second wedge-shaped members are stacked with the inclined surfaces aligned so that the respective locking teeth engage with each other,
A convex portion or a concave portion extending in the tube length direction is formed on the side wall surface of the first wedge-shaped member, and the convex groove or concave portion of the side wall surface is fitted into the guide groove surface of the holding member facing the side wall surface. A spacer for adjusting the position of a rehabilitating tube, wherein a concave portion or a convex portion is formed, and movement of the first wedge-shaped member in a direction orthogonal to the pipe length direction and the circumferential direction is restricted by the concave-convex fitting.
The repositioned pipe position adjusting spacer according to claim 1, wherein the length of the first wedge-shaped member in the tube length direction is longer than the length of the segment in the tube length direction.
3. The rehabilitation pipe according to claim 1, wherein a protrusion that abuts the segment and restricts movement in the pipe length direction is formed on a front side of the first wedge-shaped member in the pipe length direction. Position adjustment spacer.
The segment has a plurality of inner plates, side plates standing on both sides extending in the circumferential direction of the inner plate, and inner plates standing on the upper surface of the inner plate inside the side plates, and the holding member is an internal The spacer for adjusting the position of the rehabilitation pipe according to any one of claims 1 to 3, wherein the spacer is attached to a plate.
A pipe rehabilitation method in which segments are connected in the circumferential direction and pipe length direction, and a rehabilitation pipe is laid in an existing pipe,
Holding a first wedge-shaped member having locking teeth formed on an inclined surface inclined at a predetermined angle on a holding member fixed to the segment;
The first wedge-shaped member has an inclined surface inclined at the same angle as that of the first wedge-shaped member, and is movable in the insertion direction with respect to the first wedge-shaped member and not movable in the opposite direction. A second wedge-shaped member having a locking tooth that engages with a locking tooth of the wedge-shaped member is formed on the inclined surface, and is superimposed on the first wedge-shaped member so that the respective locking teeth engage with each other. Inserting the gap between the existing pipe and the rehabilitation pipe,
By moving the second wedge-shaped member in the insertion direction with respect to the first wedge-shaped member, the thickness of the entire spacer in which the first and second wedge-shaped members are overlapped increases stepwise. Adjusting, and
And a step of injecting a filler between the rehabilitation pipe and the existing pipe,
The spacers that overlap the first and second wedge-shaped members are inserted at a plurality of positions so that a gap is generated over the entire circumference between the rehabilitation pipe and the existing pipe,
The holding member for holding the first wedge-shaped member of the spacer disposed at the bottom or near the bottom of the rehabilitation pipe is fitted to the side wall of the first wedge-shaped member so that the first wedge-shaped member is connected to the tube length. A guide groove is formed that is slidable in the direction,
A convex portion or a concave portion extending in the tube length direction is formed on the side wall surface of the first wedge-shaped member slidably held in the guide groove, and the side wall surface is formed on the guide groove surface facing the side wall surface. A concave portion or a convex portion is formed to be concavo-convex with the convex portion or concave portion of the dent, and movement of the first wedge-shaped member in a direction perpendicular to the pipe length direction and the circumferential direction is limited by the concave-convex fitting. Pipe rehabilitation method.
6. The pipe rehabilitation according to claim 5, wherein the first wedge-shaped member of the spacer disposed at the bottom of the rehabilitation pipe or near the bottom is held by the holding member so as to protrude outside the rehabilitation pipe. Construction method.
The tube according to claim 5 or 6, wherein the first wedge-shaped member of the spacer disposed in the bottom portion of the rehabilitated tube or in the vicinity of the bottom portion has a length in the tube length direction longer than a length in the tube length direction of the segment. Rehabilitation method.
A protrusion that is in contact with the segment and restricts the movement of the first wedge-shaped member in the tube length direction on the front side in the tube length direction of the first wedge-shaped member of the spacer disposed at the bottom of the rehabilitated tube or in the vicinity of the bottom. The pipe rehabilitation method according to any one of claims 5 to 7, wherein is formed.
The spacer disposed in the upper part of the existing pipe is provided with an elastic deformation piece for disengaging the engagement teeth of the first and second wedge-shaped members on the second wedge-shaped member, and the elastic deformation The second wedge-shaped member can be moved in the direction opposite to the insertion direction by elastically deforming the piece to disengage the engaging teeth of the first and second wedge-shaped members. The pipe rehabilitation method according to any one of 5 to 8.
The segment has a plurality of inner plates, side plates standing on both sides extending in the circumferential direction of the inner plate, and inner plates standing on the upper surface of the inner plate inside the side plates, and the holding member is an internal The pipe rehabilitation method according to any one of claims 5 to 9, wherein the pipe rehabilitation method is attached to a plate.