JP7260185B2 - Spacer for adjusting the position of rehabilitating pipes and pipe rehabilitating construction method using the same - Google Patents

Description

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

When large-diameter existing pipes such as sewage pipes buried in the ground have deteriorated, a repair method that repairs the pipe line by lining the inner surface without digging the existing pipe from the ground is practical. has been made In such a construction method, the above-described segments are connected in the circumferential direction to assemble a pipe unit, and the pipe units are connected in the pipe length direction via connecting members to assemble a rehabilitating pipe in the pipeline. After assembling the rehabilitating pipe into the existing pipe, a filler such as grout is filled between the existing pipe and the rehabilitating pipe and hardened to construct a composite pipe.

When a filler is injected between the existing pipe and the rehabilitated pipe by such a construction method, since the rehabilitated pipe is made of a plastic material, it has a lower specific gravity than the filler and floats on the filler. In order to prevent this, a spacer as described in Patent Document 1 below is inserted between the existing pipe and the rehabilitated pipe each time the rehabilitated pipe is assembled to a predetermined length (for example, about 1 m) to lower the rehabilitated pipe. The filling material is injected by pressing and adjusting the position of the rehabilitating pipe.

In addition, a large amount of filler is injected between the existing pipe and the rehabilitated pipe at the top of the rehabilitated pipe. become difficult. Therefore, the layer thickness of the filling material varies in the circumferential direction of the rehabilitating pipe, and the rehabilitating pipe may be subjected to different external pressures in the circumferential direction due to the filling material, resulting in deformation. In order to prevent this deformation of the rehabilitating pipe, as shown in Patent Documents 2 and 3 below, shoring is assembled inside the rehabilitating pipe.

Moreover, in order to prevent the spacer inserted between the existing pipe and the rehabilitation pipe from falling from the segment, a holding member is fixed to the segment, and the spacer is held by this holding member (Patent Document 4 below). .

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

However, it is often difficult for workers to enter the rehabilitation pipe, and assembling the shoring in the rehabilitation pipe is a difficult task. There is also the problem that the shoring must be dismantled and removed from the rehabilitation pipe after the filler has hardened.

Also, in the lower part of the existing pipe, a spacer is inserted between the existing pipe and the rehabilitated pipe to form a gap along the entire circumference between the existing pipe and the rehabilitated pipe. It is also conceivable to increase the strength of the rehabilitated pipe and omit the work of assembling the shoring inside the rehabilitated pipe. However, it is often difficult to secure a gap of a predetermined thickness by inserting a spacer at or near the bottom of the existing pipe and the rehabilitated pipe.

The present invention was made in order to solve such problems, and a filler can be injected over the entire circumference by inserting a spacer at or near the bottom of the existing pipe and the rehabilitated pipe. To provide a spacer for adjusting the position of a rehabilitating pipe capable of rehabilitating an existing pipe by preventing deformation of the rehabilitating pipe without assembling a shoring in the rehabilitating pipe, and a pipe rehabilitation construction method using the spacer.

The present invention (claim 1) is
A spacer for adjusting the position of a rehabilitated pipe that is inserted into a gap between an existing pipe and a rehabilitated pipe assembled by connecting segments in the existing pipe in the circumferential direction and the pipe length direction, and that adjusts the position of the rehabilitated pipe with respect to the existing pipe. ,
A first wedge having a side wall which is fitted in a guide groove of a holding member fixed to the segment and slidably held in the pipe length direction, and has locking teeth formed on an inclined surface inclined at a predetermined angle. a shaped member;
The first wedge-shaped member has an inclined surface inclined at the same angle as the inclination angle of the first wedge-shaped member, and is movable in the insertion direction with respect to the first wedge-shaped member and cannot be moved in the opposite direction. a second wedge-shaped member having locking teeth formed on the inclined surface that engage with the locking teeth of the wedge-shaped member of
the first and second wedge-shaped members are superimposed with their ramps aligned so that their respective locking teeth engage;
The side wall surface of the first wedge-shaped member is formed with projections or recesses extending in the pipe length direction, and the guide groove surface of the holding member facing the side wall surface is fitted with the projections or recesses of the side wall surface. A concave portion or a convex portion is formed so that the concave-convex fitting restricts movement of the first wedge-shaped member in a direction orthogonal to the pipe length direction and the circumferential direction.

The present invention (claim 5) is
A pipe rehabilitation method for laying a rehabilitation pipe in an existing pipe by connecting segments in the circumferential direction and the pipe length direction,
a step of holding a first wedge-shaped member having locking teeth formed on an inclined surface inclined at a predetermined angle to a holding member fixed to the segment;
The first wedge-shaped member has an inclined surface inclined at the same angle as the inclination angle of the first wedge-shaped member, and is movable relative to the first wedge-shaped member in the insertion direction, but not in the opposite direction. A second wedge-shaped member having locking teeth formed on an inclined surface that engage with the locking teeth of the wedge-shaped member is superimposed on the first wedge-shaped member so that the respective locking teeth are engaged. a step of inserting into 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 overall thickness of the spacer in which the first and second wedge-shaped members are overlapped increases stepwise, adjusting;
a step of injecting a filler between the rehabilitation pipe and the existing pipe,
The spacers in which the first and second wedge-shaped members are superimposed are inserted in a plurality of positions so that a gap is generated along the entire circumference between the rehabilitating pipe and the existing pipe,
A holding member for holding the first wedge-shaped member of the spacer disposed at or near the bottom of the rehabilitating pipe is fitted with the side wall of the first wedge-shaped member to extend the first wedge-shaped member to the pipe length. A guide groove is formed to hold it slidably in the direction,
The side wall surface of the first wedge-shaped member slidably held in the guide groove is formed with a protrusion or a recess extending in the pipe length direction, and the guide groove surface facing the side wall surface has a side wall surface. A concave portion or a convex portion is formed to fit the convex portion or concave portion of the first wedge-shaped member in a direction perpendicular to the pipe length direction and the circumferential direction. do.

According to the present invention, the first wedge-shaped member of the spacer is held so as to be slidable in the pipe length direction. can be done. Therefore, using the protruding first wedge-shaped member as a mark, it becomes easy to install the rehabilitating pipe so that the first wedge-shaped member is at or near the bottom of the rehabilitating pipe. In addition, since the movement of the first wedge-shaped member in the direction orthogonal to the pipe length direction and the circumferential direction is restricted, even if the first wedge-shaped member comes to the bottom or near the bottom of the rehabilitating pipe, the segment is formed by its own weight. It is easy to form a gap between the rehabilitating pipe and the existing pipe by installing a spacer at or near the bottom of the rehabilitating pipe. Therefore, a gap can be formed along the entire circumference between the rehabilitated pipe and the existing pipe, and the existing pipe can be rehabilitated by injecting the filler over the entire circumference between the rehabilitated pipe and the existing pipe. be possible.

FIG. 4 is a perspective view showing the structure of a segment used for assembling the rehabilitation pipe; Fig. 10 is a perspective view showing a state in which the pipe unit is assembled by connecting the segments in the circumferential direction; FIG. 4 is an explanatory diagram showing a state in which segments of a pipe unit are connected in the pipe length direction using a connecting member; FIG. 4 is an explanatory diagram showing a state in which a rehabilitating pipe is laid in an existing pipe; FIG. 4 is a cross-sectional view showing how a filler is injected into a gap between the outer circumference of a rehabilitated pipe and the inner wall surface of an existing pipe. FIG. 4 is a perspective view showing the structure of the first wedge-shaped member of the spacer inserted in the upper portion of the rehabilitation pipe; FIG. 10 is a perspective view showing the structure of a second wedge-shaped member of the spacer that is inserted into the upper portion of the rehabilitation pipe; FIG. 10 is an explanatory diagram showing a state in which the thickness of the entire spacer is adjusted by moving the second wedge-shaped member of the spacer inserted in the upper part of the rehabilitation pipe. FIG. 10 is a perspective view showing a state in which a spacer inserted in the upper part of the rehabilitation pipe is attached to the segment; FIG. 4 is a front view of a spacer holding member holding a spacer inserted in the upper part of the rehabilitation pipe; FIG. 4 is a side view of a spacer holding member holding a spacer inserted in the upper part of the rehabilitation pipe; FIG. 4 is a perspective view showing the structure of the first wedge-shaped member of the spacer inserted at or near the bottom of the rehabilitation pipe. FIG. 4 is a perspective view showing the structure of a second wedge-shaped member of the spacer inserted at or near the bottom of the rehabilitation pipe; FIG. 10 is an explanatory diagram showing a state in which the thickness of the entire spacer is adjusted by moving the second wedge-shaped member of the spacer inserted at or near the bottom of the rehabilitation pipe. FIG. 4 is a perspective view of a spacer holding member holding a spacer inserted at or near the bottom of a rehabilitation pipe; FIG. 4 is a front view of a spacer holding member that holds a spacer inserted at or near the bottom of a rehabilitation pipe; FIG. 4 is a perspective view showing a state where a spacer holding member holding a spacer inserted at or near the bottom of a rehabilitation pipe is attached to a segment. FIG. 4 is a perspective view showing a state in which a spacer inserted at or near the bottom of the rehabilitation pipe is slid in the insertion direction; FIG. 15 is a cross-sectional view taken along line AA in FIG. 14 showing a state in which the first wedge-shaped member of the spacer inserted at or near the bottom of the rehabilitation pipe is held by the holding member; FIG. 4 is an explanatory view showing a step of inserting a spacer into the bottom of the rehabilitation pipe; FIG. 4 is an explanatory view showing a state in which spacers are inserted into the top and bottom of the rehabilitating pipe; FIG. 10 is a cross-sectional view showing another embodiment of the concave-convex fitting between the side wall surface of the first wedge-shaped member and the guide groove surface of the holding member; FIG. 10 is a cross-sectional view showing still another embodiment of the concave-convex fitting between the side wall surface of the first wedge-shaped member and the guide groove surface of the holding member;

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on embodiments shown in the accompanying drawings. INDUSTRIAL APPLICABILITY The present invention is suitable for rehabilitating or repairing large-diameter existing pipes such as sewage pipes, water supply pipes, tunnels, or agricultural waterways. In this embodiment, the rehabilitating pipe is described as having a circular cross-sectional shape perpendicular to the pipe length direction, but the present invention can of course be applied to a rehabilitating pipe having a shape other than a circular shape.

FIG. 1 shows the structure of a rehabilitating pipe segment 1 (hereinafter simply referred to as segment). Segment 1 comprises an inner plate 101 forming the inner peripheral surface of the rehabilitated pipe, side plates 102 and 103 of the same shape erected vertically on both sides extending in the circumferential direction of the inner plate 101, and the inner plate 101 in the pipe length direction. An integrally molded block-shaped member made of plastic, consisting of end plates 104 and 105 of the same shape erected vertically at both ends extending to the same direction and a plurality of inner plates 106 and 107 of the same shape erected at equal intervals. is.

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

The side plates 102, 103 and the inner plate 106 are provided with circular insertion holes 102a, 103a, 106a for passing connecting members 11 and nuts 12 (FIG. 3) configured as bolts for connecting the segments 1 in the pipe length direction. A plurality of them are formed at equal intervals in the circumferential direction. The internal plate 107 is also formed with a plurality of cutouts 107a into which the connecting members 11 can be inserted at regular intervals.

The end plates 104 and 105 are formed with a plurality of circular insertion holes 104a and 105a through which connecting members such as bolts connecting the segments 1 in the circumferential direction are passed. The end plate 105 of the segment is brought into contact with the end plate 104 of another segment, the bolt 6 and nut 7 are inserted through the work holes 102b and 103b formed in the side plates 102 and 103, and the bolt 6 and nut 7 are inserted. They can be connected in the circumferential direction by screwing them together (Fig. 3).

In addition, a plurality of notches 102c, 103c, and 106b are formed in the upper edges of the side plates 102 and 103 and the internal plate 106 to allow passage of a filling material, which will be described later. are different from the positions of the notches 102c and 103c formed in the side plates 102 and 103 in the circumferential direction.

A ring-shaped pipe unit 10 as shown in FIG. 2 can be assembled by sequentially connecting the segments for one turn in the circumferential direction. The pipe unit 10 has a shape obtained by cutting a circular pipe into round slices of a predetermined width D perpendicular to the pipe length direction X, and its outer diameter is slightly smaller than the inner diameter of the existing pipe to be rehabilitated. there is A segment corresponds to a member obtained by dividing (preferably equally dividing) the pipe unit 10 into a plurality of pieces in the circumferential direction C along a cutting surface along the radial direction R.

2, the inner 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. Therefore, illustration is omitted.

A plurality of nuts 12 are fixed to each segment of the tube unit 10 using bolts 13, as shown in FIG. For example, when connecting the segment 1a to the segment 1b in the pipe length direction, the connecting member 11 is used, which has a threaded portion 11a formed at one end thereof to be screwed with the nut 12, and a head portion 14 having a collar 14a at the other end. . The side plates 103 and 102 of both segments 1a and 1b are butted against each other, 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 internal plate 106, and the notch 107a of the internal plate 107, and the screw portion 11a is inserted. When the nut 12 fixed to the segment 1b is screwed, 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 portion 14 presses against the inner plate 106 at the leftmost end of the segment 1a, both segments 1a and 1b are bolted and connected in the pipe length direction.

In order to rehabilitate an existing pipe using the segment 1 configured as described above, first, as shown in FIG. The pipe unit 10 is assembled by connecting. Subsequently, the pipe units 10 are sequentially connected in the pipe length direction using the connecting members 11 and the nuts 12 by the method shown in FIG. 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. A filler 30 is injected into the gap between the rehabilitation pipe 40 and the existing pipe 21 . At this time, spacers 50 and 70 are provided between the rehabilitation pipe 40 and the existing pipe 21 so that the filler 30 is injected with a predetermined layer thickness over the entire circumference between the rehabilitation pipe 40 and the existing pipe 21. are placed.

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

The first wedge-shaped member 51 of the spacer 50 has a groove 51a formed in the center thereof, and a large number of engaging teeth 51b formed at a predetermined pitch along the inclined surface at the bottom thereof. A plurality of elongated holes 51c for passing the filler 30 are formed between the groove 51a and the side walls 51d and 51e on both sides, and a protrusion 51g is formed on the insertion front side.

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 has a convex portion 52a that fits into the groove 51a and an elastic deformation piece following the convex portion 52a. 52 g are formed. A plurality of (for example, two) locking teeth 52b are formed on the lower surface of the elastically deformable piece 52g at a pitch that is an integral multiple of the pitch of the locking teeth 51b. The locking teeth 51b and 52b each have a sawtooth shape with an inclined surface and a vertical surface, and when the vertical surfaces are engaged, the tooth surfaces are movable in only one direction. A long hole 52c aligned with the long hole 51c of the first wedge-shaped member 51 is formed between the protrusion 52a and the side walls 52d and 52e on both sides.

The first wedge-shaped member 51 is inclined at a predetermined angle (approximately 10°) so that the far side in the insertion direction is higher. Since it has an inverted wedge shape inclined at an angle, when the protrusion 52a of the second wedge-shaped member 52 is fitted into the groove 51a of the first wedge-shaped member inclined at the same angle and overlapped, the structure shown in FIG. , the locking teeth 51b, 52b are engaged with each other so that the lower surface 51f of the first wedge-shaped member 51 and the upper surface 52f of the second wedge-shaped member are parallel.

In FIG. 7, when the second wedge-shaped member 52 is pushed in the direction A, the locking teeth 51b and 52b engage with the inclined surfaces and move in the direction A, but in the opposite direction the vertical surfaces engage. movement is blocked. As a result, by pushing the second wedge-shaped member 52 in the direction A, the thickness H of the entire spacer 50 is changed stepwise at small pitches according to the inclination angles of the first and second wedge-shaped members 51 and 52. can be increased to Since the elastically deformable piece 52g is elastically deformed, when it is lifted, the locking teeth 51b and 52b are disengaged. thickness can be reduced. As shown in FIG. 2, the first wedge-shaped member 51 is attached to the segment using a spacer holding member 60, which will be described below, before or after assembling the tube unit 10. Keep

As shown in FIGS. 8, 9a and 9b, the spacer holding member 60 for holding the first wedge-shaped member 51 of the spacer 50 has planes 60a and 60b in the tube length direction (front-to-rear direction). A groove 60c having a width t1 is formed in the central portion over the entire length in the circumferential direction (horizontal direction). The width t1 of the groove 60c is set to the same value as the plate thicknesses of the side plates 102, 103 and the internal plates 106, 107 of the segment 1. As shown in FIG. With such a setting, the spacer holding member 60 can be fixed to the internal plate 107 by pressing the internal plate 107 into the groove 60c of the spacer holding member 60, as shown in FIG.

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 the first 1 and the width of the second wedge-shaped members 51 and 52. With such a setting, the first wedge-shaped member 51 can be fixed and held in 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 portion to the central portion of the rehabilitating pipe 40, and the lower portion of the rehabilitating pipe 40, particularly the bottom or near the bottom, as shown in FIGS. 10a and 10b. A spacer 70 and a spacer retaining 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 top side is shown in FIG. 10a and a second wedge-shaped member 72 whose bottom side is shown in FIG. 10b. A groove 71a is formed in the center of the first wedge-shaped member 71, and a large number of locking teeth 71b are formed at a predetermined pitch on a sloped surface inclined at a predetermined angle at the bottom of the groove 71a. Between the groove 71a and the side walls 71d and 71e on both sides, a plurality of elongated holes 71c for passing the filler 30 are formed. A protrusion 71g is formed to limit the movement of the first wedge-shaped member 71 in the insertion direction. In addition, on the outer wall surfaces of the side walls 71d and 71e, convex portions 71h and 71i projecting in the circumferential direction (lateral direction) are formed over the entire length direction (pipe 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. The inclined surface of the convex portion 72a has locking teeth 72b. The pitch is an integral multiple of the pitch of the locking teeth 71b of the wedge-shaped member 71. As shown in FIG. The locking teeth 71b and 72b each have a sawtooth shape with an inclined surface and a vertical surface, and when the vertical surfaces are engaged, the tooth surfaces are movable in only one direction. A plurality of elongated holes 72c for allowing the filler 30 to pass are formed between the protrusion 72a and the side walls 72d and 72e on both sides.

The first wedge-shaped member 71 is inclined at a predetermined angle (approximately 2 to 5°) so that the depth side in the insertion direction is higher. , the groove 71a of the first wedge-shaped member 71 and the protrusion 72a of the second wedge-shaped member 72 are fitted to form the first and second wedge-shaped members. When the members 71 and 72 are superimposed, as shown in FIG. 11, the groove 71a inclined at the same angle and the locking teeth 71b and 72b formed on the projection 72a are engaged with each other to form the first wedge-shaped member. The lower surface 71f of 71 and the upper surface 72f of the second wedge-shaped member 72 are parallel. The circumferential widths of the first and second wedge-shaped members 71 and 72 of the spacer 70 are the same as the width t3 of the first and second wedge-shaped members 51 and 52 of the spacer 50, respectively. ing.

Spacer 70 is actually located at the lower portion of the rehabilitation pipe, so that, for example, when located at the bottom, first wedge-shaped member 71 is positioned at the second, as shown in FIGS. The first wedge member 71 is shown below the second wedge member 72 in FIG. Similarly, in FIGS. 12a, 12b, and 13 to 15, a spacer holding member 80 for holding a first wedge-shaped member 71, which will be described later, is shown upside down from its actual position. .

In FIG. 11, when the second wedge-shaped member 72 is pushed in the direction A, the locking teeth 71b and 72b engage with the inclined surfaces and move in the direction A, but in the opposite direction the vertical surfaces engage. movement is blocked. As a result, by pushing the second wedge-shaped member 72 in the direction A, the thickness h of the entire spacer 70 is changed stepwise at small pitches according to the inclination angles of the first and second wedge-shaped members 71 and 72. can be increased to It should be noted that the first wedge-shaped member 71, like the first wedge-shaped member 51 of the spacer 50, is attached to the segment using the spacer holding member 80 before or after the tube unit 10 is assembled. keep it installed.

As shown in FIGS. 12a and 12b, the spacer holding member 80 for holding the first wedge-shaped member 71 of the spacer 70 has planes 80a and 80b in the pipe length direction (front-to-rear direction). A groove 80c having a width t1 is formed along the entire length in the circumferential direction (horizontal direction). The width t1 of the groove 80c is set to the same value as the plate thicknesses 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. FIG. With such a setting, the spacer holding member 80 can be fixed to the internal plate 107 by pressing the internal plate 107 into the groove 80c of the spacer holding member 80, as shown in FIG.

In addition, outer walls 80f and 80g are formed on both sides of the spacer holding member 80 in the circumferential direction (horizontal direction), and inner walls 80h and 80i are provided inside the outer walls 80f and 80g. Guide grooves 80j and 80k are formed to fit 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. In addition, protrusions 80d and 80e are formed on the outer groove surfaces of the guide grooves 80j and 80k (inner side 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 of the guide groove 80j and the protrusion 80d. A concave portion 80p is formed in the first wedge-shaped member 71 so as to engage with the convex portion 71h. A concave portion 80q 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 projection 80e.

As shown in FIG. 15, the width w1 of the guide grooves 80j and 80k in the circumferential direction is determined by 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 projection amount w2 of the portions 71h and 71i. With this 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. It can be slid back and forth in the pipe length direction.

Further, the first wedge-shaped member 71 is fitted to the holding member 80 so that the projections 71h and 71i of the first wedge-shaped member 71 are fitted into the recesses 80p and 80q of the spacer holding member 80. 15, the wedge-shaped member 71 is limited in movement in the vertical direction, that is, in the direction Y perpendicular to the pipe length direction X and the circumferential direction C. As shown in FIG. Therefore, even if the first wedge-shaped member 71 is held upside down in FIG.

With such a configuration, a process of inserting spacers at a plurality of positions so as to generate a gap along the entire circumference between the rehabilitating pipe and the existing pipe to construct the rehabilitating pipe in the existing pipe will be described.

The spacers 50 and 70 are rehabilitated with the existing pipe 21 as shown in FIG. Insert between tubes 40 .

In this embodiment, the spacers are inserted at a plurality of positions so that gaps are generated along the entire circumference between the rehabilitating pipe and the existing pipe. Therefore, a spacer 50 is used from the upper portion to the central portion of the rehabilitating pipe 40, and a spacer 70 is used at the bottom portion or near the bottom portion of the rehabilitating pipe 40. As shown in FIG. 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 spacer 70 to hold the first wedge-shaped member 71 .

First, to lift the bottom of the rehabilitation pipe 40 from the existing pipe 21, a 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 of the rehabilitation pipe is inserted into the rehabilitation pipe 40 so that the first wedge-shaped member 71 protrudes 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 existing rehabilitation pipe 40 is installed so that the first wedge-shaped member 71 protruding from the segment 1 is used as a mark and the first wedge-shaped member 71 is at the bottom of the rehabilitation pipe 40. Installation within the pipe 21 is facilitated.

Even if the first wedge-shaped member 71 is held so as to protrude from the outside of the segment 1 in this way, the first wedge-shaped member 71 can slide in the pipe length direction, and as shown in the bottom row of FIG. Since it can be moved until it finally abuts on the side plate 102 of the segment 1, the inserted first wedge-shaped member 71 does not collide with the next connected segment.

16, even if the first wedge-shaped member 71 is moved to the bottom of the rehabilitating pipe 40, the protrusion 71h of the side wall of the first wedge-shaped member 71, 71i and the grooves 80p and 80q of the guide grooves of the spacer holding member 80 are engaged with each other to move the first wedge-shaped member 71 in a direction Y (vertical direction in the drawing) orthogonal to the pipe length direction X and the circumferential direction C. is restricted, the first wedge-shaped member is prevented from falling off the segment 1 (see the cross-sectional views within the circular phantom lines in the first row of FIGS. 15 and 16).

Subsequently, as shown in the second row of FIG. 16, the second wedge-shaped member 72 is aligned with the inclined surface of the first wedge-shaped member 71 so that the first wedge-shaped member 71 and the existing pipe 21, using a crowbar, a rubber hammer, etc., and pushing the second wedge-shaped member 72 between the first and second wedge-shaped members 71, The spacer 70 is slid in the direction of arrow A until the entire thickness of the spacer 70 with the 72 superimposed thereon reaches the desired thickness h1.

Subsequently, as shown in the bottom row 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 crowbar, a rubber hammer, or the like. Let This movement is performed until the projection 71g of the first wedge-shaped member 71 abuts within the recess 102d (not shown in FIG. 1) formed in the side plate 102 of the segment 1. As shown in FIG. Since the protrusion 71g abuts on the recess 102d formed in the side plate 102 of the segment 1, further movement of the first wedge-shaped member 71 in the pipe length direction is restricted. Also, 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 of the first and second wedge-shaped members 71 and 72 in the pipe length direction is set longer than the length D of the segment 1 in the pipe length direction. Therefore, since the spacer 70 extends in the pipe length direction over the entire bottom portion of the segment and supports the segment, deformation of the rehabilitating pipe can be prevented.

Since the spacer 70 is inserted into the bottom of the rehabilitating pipe 40 in this way, as shown in FIG. insert. In that case, since the gap with the existing pipe 21 increases toward the top, the second wedge-shaped member 72 is moved further inside than shown in the bottom of FIG. 16 .

Subsequently, as shown in FIG. 5, spacers 50 are inserted in the gap between the rehabilitation pipe 40 and the existing pipe 21 from the vicinity of the central portion to the upper portion of the rehabilitation pipe 40 at intervals in the circumferential direction. Adjust thickness.

Even if the second wedge-shaped member 52 is superimposed on the first wedge-shaped member 51, the spacer 50 inserted in the upper part of the rehabilitating pipe is less likely to fall off. 51 and 52 are overlapped so that the first wedge-shaped member 51 is held by the spacer holding member 60 .

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 as shown in FIG. FIG. 17 shows a spacer 50 inserted at the top of the rehabilitation pipe with a spacer 70 inserted at the bottom.

The second wedge-shaped member 52 of the spacer 50 is provided with an elastic deformation piece 52g. direction to reduce the thickness of the spacer 50 . Therefore, by increasing or decreasing the thickness of the spacer 50, a plurality of spacers are arranged at predetermined intervals along the entire circumference between the rehabilitated pipe and the existing pipe with a thickness corresponding to the gap between the rehabilitated pipe and the existing pipe. be able to.

When the rehabilitation pipe 40 is assembled to a desired length (for example, about 5 m), as shown in FIG. Then, the filling material 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, the spacers 50 and 70 are inserted between the existing pipe 21 and the rehabilitation pipe 40 each time the rehabilitation pipe 40 is assembled by about 0.6 m, and the spacers 50 and 70 are extended by about 5 m. Once assembled, the process of injecting filler material 30 is repeated.

The filler 30 includes insertion holes 102a, 103a, and 106a formed in the side plates 102, 103 and the internal plates 106, 107, a cutout 107a, a cutout 102c formed in the upper edges of the side plates 102, 103 and the internal plate 106, It also flows in via 103c and 106b, and also flows into elongated holes 51c and 52c formed in spacer 50 and elongated holes 71c and 72c formed in spacer . In addition, since the notch 106b formed in the upper edge of the inner plate 106 has a different position in the circumferential direction than the notches 102c and 103c formed in the upper edges of the side plates 102 and 103, 30 can meander over the top of the segment to even out the injection of filler material 30 . After the filler 30 hardens, a firm composite pipe is constructed from the existing pipe 21, the filler 30, and the rehabilitated pipe 40.

In this embodiment, a plurality of spacers are arranged with a thickness corresponding to the gap between the rehabilitated pipe and the existing pipe at predetermined intervals along the entire circumference between the rehabilitated pipe and the existing pipe so that the rehabilitated pipe is not deformed. be done. Accordingly, the rehabilitating pipe is firmly held by the spacers all around, and deformation of the rehabilitating pipe due to the injected filling material is prevented by the spacers arranged in corresponding places. In this way, the spacer functions as a shoring to prevent deformation of the rehabilitating pipe, eliminating the need to assemble a shoring inside the rehabilitating pipe, making it possible to carry out pipe rehabilitation work efficiently.

The arrangement position of the spacers, the number of spacers to be used, their types, etc. are not limited to the above-described embodiment. Also, 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 with different density.

In the above-described embodiment, the outer wall surfaces of the side walls 71d and 71e of the first wedge-shaped member 71 of the spacer 70 are provided with the projections 71h and 71i, and the surfaces of the guide grooves 80j and 80k of the spacer holding member 80 facing the protrusions 71h and 71i are formed. 18a, concave portions 71r and 71s are provided in the outer wall surfaces of the side walls 71d and 71e, and convex surfaces of the guide grooves 80j and 80k facing the concave portions 71r and 71s are provided in the outer wall surfaces of the side walls 71d and 71e. The portions 80r and 80s may be provided to fit in a concave-convex manner. Alternatively, as shown in FIG. 18b, protrusions 71u and 71v are provided on the inner wall surfaces of the side walls 71d and 71e, and recesses 80u and 80v are provided on the opposing surfaces of the guide grooves 80j and 80k so that they are fitted to each other. may Further, in FIG. 18b, the concave portion may be provided on the inner wall surface, and the convex portion may be provided on the opposing guide groove surface.

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 teeth 71d, 71e Side wall 71g Projection 71h, 71i Protrusion 72 Second wedge-shaped member 72b Locking tooth 72d, 72e Side wall 80 Spacer holding member 80d, 80e Projection 80f, 80g Outer walls 80h, 80i Inner walls 80j, 80k Guide grooves 80p, 80q Concave portions

Claims (8)

A spacer for adjusting the position of a rehabilitated pipe that is inserted into a gap between an existing pipe and a rehabilitated pipe assembled by connecting segments in the existing pipe in the circumferential direction and the pipe length direction, and that adjusts the position of the rehabilitated pipe with respect to the existing pipe. ,
A first wedge having a side wall which is fitted in a guide groove of a holding member fixed to the segment and slidably held in the pipe length direction, and has locking teeth formed on an inclined surface inclined at a predetermined angle. a shaped member;
The first wedge-shaped member has an inclined surface inclined at the same angle as the inclination angle of the first wedge-shaped member, and is movable in the insertion direction with respect to the first wedge-shaped member and cannot be moved in the opposite direction. a second wedge-shaped member having locking teeth formed on the inclined surface that engage with the locking teeth of the wedge-shaped member of
the first and second wedge-shaped members are superimposed with their ramps aligned so that their respective locking teeth engage;
The side wall surface of the first wedge-shaped member is formed with projections or recesses extending in the pipe length direction, and the guide groove surface of the holding member facing the side wall surface is fitted with the projections or recesses of the side wall surface. A spacer for adjusting the position of a rehabilitating pipe, wherein a recessed portion or a protruding portion is formed so that the first wedge-shaped member is restricted from moving in a direction perpendicular to the longitudinal direction and the circumferential direction of the first wedge-shaped member. 2. The spacer for adjusting the position of a rehabilitating pipe according to claim 1, wherein the length of the first wedge-shaped member in the pipe length direction is longer than the length of the segment in the pipe length direction. 3. The rehabilitating pipe according to claim 1, wherein the first wedge-shaped member is formed with a projection that abuts on the segment and restricts movement in the pipe length direction on the front side in the pipe length direction. Spacer for position adjustment. The segment has an inner plate, side plates erected on both sides of the inner plate extending in the circumferential direction, and a plurality of inner plates erected on the upper surface of the inner plate inside the side plates. The spacer for adjusting the position of the rehabilitating pipe according to any one of claims 1 to 3, wherein the spacer is attached to a plate. A pipe rehabilitation method for laying a rehabilitation pipe in an existing pipe by connecting segments in the circumferential direction and the pipe length direction,
a step of holding a first wedge-shaped member having locking teeth formed on an inclined surface inclined at a predetermined angle to a holding member fixed to the segment;
The first wedge-shaped member has an inclined surface inclined at the same angle as the inclination angle of the first wedge-shaped member, and is movable relative to the first wedge-shaped member in the insertion direction, but not in the opposite direction. A second wedge-shaped member having locking teeth formed on an inclined surface that engage with the locking teeth of the wedge-shaped member is superimposed on the first wedge-shaped member so that the respective locking teeth are engaged. a step of inserting into 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 overall thickness of the spacer in which the first and second wedge-shaped members are overlapped increases stepwise, adjusting;
a step of injecting a filler between the rehabilitation pipe and the existing pipe,
The spacers in which the first and second wedge-shaped members are superimposed are inserted in a plurality of positions so that a gap is generated along the entire circumference between the rehabilitating pipe and the existing pipe,
A holding member for holding the first wedge-shaped member of the spacer disposed at or near the bottom of the rehabilitating pipe is fitted with the side wall of the first wedge-shaped member to extend the first wedge-shaped member to the pipe length. A guide groove is formed to hold it slidably in the direction,
The side wall surface of the first wedge-shaped member slidably held in the guide groove is formed with a protrusion or a recess extending in the pipe length direction, and the guide groove surface facing the side wall surface has a side wall surface. A concave portion or a convex portion is formed to fit the convex portion or concave portion of the first wedge-shaped member in a direction perpendicular to the pipe length direction and the circumferential direction. pipe rehabilitation method. 6. The pipe rehabilitation according to claim 5, wherein the first wedge-shaped member of the spacer arranged at or near the bottom of the rehabilitation pipe is held by the holding member so as to protrude outside the rehabilitation pipe. Construction method. 7. The pipe according to claim 5 or 6, wherein the first wedge-shaped member of the spacer arranged at or near the bottom of the rehabilitating pipe has a length in the pipe length direction longer than that of the segment in the pipe length direction. Rehabilitation method. The first wedge-shaped member of the spacer disposed at or near the bottom of the rehabilitating pipe has a protrusion that abuts against the segment and limits the movement of the first wedge-shaped member in the pipe length direction. The pipe rehabilitation method according to any one of claims 5 to 7, wherein is formed.

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