JP7117231B2 - Rehabilitation pipe straightening method and rehabilitation pipe support device - Google Patents

Description

The present invention provides a method for correcting the position and cross-sectional shape of a rehabilitating pipe before filling a space between an existing deteriorated pipe and a rehabilitating pipe placed inside the existing pipe with a back-filling material, and this method. It relates to a workable rehabilitation pipe shoring system.

In order to rehabilitate existing pipes such as aged sewer pipes, it is known to arrange rehabilitation pipes inside the existing pipes. A backfilling material such as mortar is filled between the existing pipe and the rehabilitated pipe, but before this backfilling material is filled, a shoring device is installed on the rehabilitated pipe at intervals in the axial direction of the rehabilitated pipe. be done.

The shoring device of Patent Document 1 has an annular frame and a plurality of jacks supported by the frame at intervals in the circumferential direction. A wale member is bridged between the jacks of the adjacent shoring devices. A wale member is pressed against the inner surface of the rehabilitation pipe by a jack. The screw rod of the topmost jack penetrates the upper wall of the rehabilitated pipe and contacts the upper wall of the existing pipe.

Since the radially inward pressure acting on the rehabilitation pipe is received by the wale member when the backfilling material is filled, the deformation of the rehabilitation pipe can be prevented. Moreover, since the threaded rod of the highest jack is in contact with the upper wall surface of the existing pipe, it is possible to prevent the rehabilitated pipe from rising.

There is also known a shoring system in which a long horizontal shoring and a vertical shoring which can be expanded and contracted by jacks are connected by clamps without using an annular frame. The vertical shoring penetrates the upper wall of the rehabilitating pipe, with its upper end abutting the upper wall of the existing pipe and its lower end abutting the bottom wall of the rehabilitating pipe via a wale member. Both ends of the horizontal shoring are in contact with the right and left side walls of the rehabilitation pipe via wale members. Horizontal shoring and vertical shoring prevent deformation of the rehabilitating pipe when the lining material is filled, and vertical shoring prevents the rehabilitating pipe from floating.

JP-A-10-121565

When the planar shape of the existing pipe is curved (curved when viewed from above), the rehabilitated pipe does not follow the curved shape and deviates laterally from the central axis of the existing pipe in an attempt to maintain a straight state. Resulting in. When the curvature of the existing pipe is large, the rehabilitated pipe is pressed against one side wall surface of the existing pipe, and its cross-sectional shape may be deformed from the original circular shape to an oblong elliptical shape.
If the rehabilitated pipe is offset in the horizontal direction with respect to the existing pipe, the thickness of the lining material on the left and right sides becomes uneven, resulting in a decrease in strength. In addition, if the lining material is filled while the cross-sectional shape of the rehabilitating pipe is deformed into an elliptical shape, the flow cross-sectional area is reduced.
The shoring device provided with the annular frame of Patent Document 1 and the shoring device provided with the above-mentioned long shoring do not have the function of correcting such horizontal deflection and deformation of the cross-sectional shape of the rehabilitation pipe. .

The present invention has been made in order to solve the above-mentioned problems, and a rehabilitation pipe is arranged inside an existing pipe having a curved planar shape, and the rehabilitation pipe is horizontally displaced from the center axis of the curved portion of the existing pipe. A method for correcting the position of the rehabilitating pipe in the curved portion before filling a space between the existing pipe and the rehabilitating pipe with a back-filling material in a state where the rehabilitating pipe is positioned,
A stretchable first shoring provided with a first jack is installed in the rehabilitation pipe in a horizontal or inclined position, and in this installed state, the first shoring is a pair of horizontally facing each other in the rehabilitation pipe. One end of the first shoring penetrates one of the side wall portions far from the center axis of the existing pipe, and one end of the first shoring hits one side wall surface of the existing pipe facing the one side wall portion, and the first shoring a first shoring installation step in which the other end of the shoring contacts the other side wall portion of the pair of side wall portions of the rehabilitating pipe via a waling member extending in the axial direction of the rehabilitating pipe;
Next, by extending the first support with the first jack, the other side wall portion of the rehabilitating pipe is pushed and moved toward the other side wall surface of the existing pipe, thereby causing the center of the rehabilitating pipe to move. a straightening step of matching or approaching the central axis of the existing pipe when viewed from above;
characterized by comprising

According to the above method, even when a rehabilitation pipe is placed on a curved existing pipe, the central axis of the rehabilitation pipe is aligned with or brought close to the central axis of the existing pipe. It is possible to secure high strength.

Preferably, the one side wall portion of the rehabilitating pipe abuts the one side wall surface of the existing pipe, and the straightening step is performed in a state in which the cross-sectional shape of the rehabilitating pipe is deformed into an elongated ellipse. returns the cross-sectional shape of the rehabilitating pipe to the original circular or circular shape.
According to the above method, a sufficient flow cross-sectional area can be ensured by making the cross-sectional shape of the rehabilitating pipe circular or nearly circular.

Preferably, further following the straightening step, an extendable second shoring provided with a second jack is installed in the rehabilitation pipe in a vertical or inclined position so as to intersect the first shoring, In this installed state, the second shoring penetrates the upper wall portion of the rehabilitation pipe, the upper end of the second shoring hits the upper wall surface of the existing pipe, and the lower end of the second shoring touches the upper wall of the rehabilitation pipe. A second shoring installation step is provided in which the first shoring and the second shoring are connected by a clamp to the bottom wall portion through another wale member extending in the axial direction of the rehabilitation pipe. there is
According to the above method, deformation of the rehabilitated pipe can be suppressed by the first and second shorings, the rehabilitated pipe can be stably supported, and floating can be prevented during backfilling.

Preferably, said first shoring is arranged horizontally and said second shoring is arranged vertically, and further following said second shoring installation step,
By extending the second shoring with the second jack while gradually contracting the first shoring with the first jack, the bottom wall portion of the rehabilitation pipe is pressed against the bottom wall surface of the existing pipe, thereby A rehabilitating pipe bottom wall portion fixing step of making the cross-sectional shape of the pipe a vertically long elliptical shape;
The first jack is further contracted to release the restraint of the rehabilitation pipe by the first shoring, the state of connection between the first shoring and the second shoring by the clamp is released, and the first shoring is removed. a rehabilitated pipe shape restoration step of restoring the cross-sectional shape of the rehabilitated pipe to the original circular shape or a shape close to a circular shape by moving downward;
The one end of the first shoring is applied to the one side wall surface of the existing pipe, the first shoring is extended by the first jack, and the other end of the first shoring is waled. a rehabilitating pipe reinforcing step of contacting the other side wall portion of the rehabilitating pipe via a member;
It has
According to the above method, by fixing the bottom wall portion of the rehabilitating pipe to the existing pipe, the rehabilitating pipe can be more stably supported when the lining material is filled.

Preferably, a first gripping portion for gripping the first shoring and a second gripping portion for gripping the second shoring of the clamp are rotatable relative to each other; The shoring is installed horizontally, the second shoring is installed vertically in the second shoring installation step, and further, following the second shoring installation step,
By extending the second shoring with the second jack while gradually contracting the first shoring with the first jack, the bottom wall portion of the rehabilitation pipe is pressed against the bottom wall surface of the existing pipe, thereby A rehabilitating pipe bottom wall portion fixing step of making the cross-sectional shape of the pipe a vertically long elliptical shape;
By rotating the first shoring around the clamp and adjusting the length by the first jack, the one end of the first shoring is moved to the one side of the existing pipe at a position higher than the clamp. While abutting the wall surface, the other end of the rehabilitating pipe is brought into contact with the other side wall portion of the rehabilitating pipe via the wale member at a position lower than the clamp, thereby moving the rehabilitating pipe to the original circle or a rehabilitated pipe shape restoration/reinforcement step of restoring the rehabilitated pipe to a shape close to a circle and reinforcing the rehabilitated pipe;
It has
According to the above method, a rehabilitating pipe that has been deformed into an elongated elliptical shape can be returned to its original circular or circular shape by a relatively simple process, and the rehabilitating pipe can be stably supported when the lining material is filled. can do.

In the first shoring installation step, the first shoring is arranged at an angle of less than 45° with respect to the horizontal plane, and the one end of the first shoring is positioned higher than the central axis of the rehabilitation pipe. It hits the one side wall surface of the existing pipe, and the other end of the first support is attached to the other side wall portion of the rehabilitation pipe via the wale member at a position lower than the central axis of the rehabilitation pipe. hit,
In the step of installing the second shoring, the second shoring is inclined with respect to the vertical plane at an angle of less than 45° and is installed in a posture orthogonal to the first shoring.
According to the above method, since the rehabilitating pipe is supported with respect to the existing pipe at two points higher than its central axis, the rehabilitating pipe can be stably supported when the lining material is filled.

Another aspect of the present invention is a shoring device installed in the rehabilitation pipe before filling the space between the existing pipe and the rehabilitation pipe arranged inside the existing pipe with a backfilling material,
a horizontal first shoring with a first jack; a vertical second shoring with a second jack; and a clamp connecting said first shoring and said second shoring; A shoring penetrates one side wall of a pair of side walls facing each other in the rehabilitating pipe, and one end of the first shoring faces one side of the existing pipe facing the one side wall. The other end of the first shoring hits the wall surface, the other end of the first shoring hits the other side wall of the rehabilitation pipe via a wale member extending in the axial direction of the rehabilitation pipe, and the second shoring hits the wall of the rehabilitation pipe. It penetrates the upper wall portion, the upper end of the second shoring hits the upper wall surface of the existing pipe, the lower end of the second shoring extends to the bottom wall portion of the rehabilitating pipe, and extends in the axial direction of the rehabilitating pipe. It is characterized in that it hits via the wale raising member.
According to the above configuration, the rehabilitating pipe can be supported when the lining material is filled, and the horizontal deviation of the rehabilitating pipe with respect to the central axis of the existing pipe can be corrected by the first support.
Preferably, the lower end of the second shoring presses and fixes the bottom wall portion of the rehabilitating pipe against the bottom wall surface of the existing pipe.

Still another aspect of the present invention is a shoring device installed in a rehabilitation pipe before filling a space between the existing pipe and the rehabilitation pipe arranged inside the existing pipe with a backfilling material,
A first shoring inclined with respect to the horizontal plane with a first jack, a vertical second shoring with a second jack, and a clamp connecting the first shoring and the second shoring, The clamp has a first gripping portion that grips the first shoring and a second gripping portion that grips the second shoring, and the first gripping portion and the second gripping portion are relatively rotatable. wherein the first shoring penetrates one side wall of a pair of side walls facing each other horizontally in the rehabilitation pipe at a position higher than the clamp, and one end of the first shoring is higher than the clamp The other end of the first shoring hits one side wall of the existing pipe facing the one side wall at a position, and the other end of the first shoring hits the other side wall of the rehabilitating pipe at a position lower than the clamp. The second shoring penetrates the upper wall portion of the rehabilitating pipe, the upper end of the second shoring hits the upper wall surface of the existing pipe, and the second The lower end of the shoring abuts the bottom wall portion of the rehabilitation pipe via another wale extending in the axial direction of the rehabilitation pipe.
According to the above configuration, the rehabilitating pipe can be supported when the lining material is filled, and the horizontal deviation of the rehabilitating pipe with respect to the central axis of the existing pipe can be corrected by the first support.

Still another aspect of the present invention is a shoring device installed in a rehabilitation pipe before filling a space between the existing pipe and the rehabilitation pipe arranged inside the existing pipe with a backfilling material,
A first shoring with a first jack, inclined at an angle of less than 45° to the horizontal, and a second jack, inclined at an angle of less than 45° to the vertical and perpendicular to said first shoring. A second shoring and a clamp that connects the first shoring and the second shoring, wherein the first shoring is one of a pair of side wall portions that face each other in the horizontal direction in the rehabilitation pipe. The side wall is penetrated at a position higher than the clamp, one end of the first shoring hits one side wall surface of the existing pipe at a position higher than the clamp, and the other end of the first shoring is higher than the clamp. At a low position, it hits the other side wall portion of the rehabilitation pipe via a waling member extending in the axial direction of the rehabilitation pipe, and the second shoring penetrates the upper wall portion of the rehabilitation pipe, The upper end of the second shoring abuts the upper wall surface of the existing pipe, and the lower end of the second shoring abuts the bottom wall of the rehabilitating pipe via a wale member extending in the axial direction of the rehabilitating pipe.
According to the above configuration, the rehabilitating pipe can be supported when the lining material is filled, and the horizontal deviation of the rehabilitating pipe with respect to the central axis of the existing pipe can be corrected by the first support.

According to the present invention, even if the planar shape of the existing pipe is curved and the central axis of the rehabilitated pipe is deviated in the horizontal direction with respect to the central axis of the existing pipe, the rehabilitated pipe is straightened so that the back-filling material can be can be filled almost evenly to the left and right, and high strength can be ensured.

FIG. 2 is a plan cross-sectional view showing a bent portion of an old existing pipe and a rehabilitated pipe placed inside the existing pipe, showing a state before the shoring device according to the present invention is installed. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, showing a state in which the rehabilitated pipe hits the existing pipe and its cross-sectional shape is deformed into an oblong elliptical shape. FIG. 4 is a cross-sectional view showing a step of installing a horizontal first shoring in the rehabilitation pipe in the first embodiment of the present invention; FIG. 4 is a cross-sectional view showing a process of extending the first shoring and correcting the position and cross-sectional shape of the rehabilitation pipe. FIG. 4 is a cross-sectional view showing a process of installing a vertical second shoring in the rehabilitation pipe and connecting the second shoring to the first shoring with a clamp. FIG. 4 is a cross-sectional view showing a process of extending the second support and contracting the first support to press the bottom wall portion of the rehabilitating pipe against the bottom wall surface of the existing pipe and transforming the rehabilitating pipe into a vertically long elliptical shape; be. FIG. 11 is a cross-sectional view showing a step of releasing the restraint of the rehabilitating pipe by the first shoring and returning the cross-sectional shape of the rehabilitating pipe to a circular shape by further contracting the first shoring and moving it downward. FIG. 4 is a cross-sectional view showing a step of reinforcing a rehabilitation pipe by extending the first shoring and restraining the rehabilitation pipe with the first shoring and the second shoring. FIG. 4 is an exploded perspective view showing jacks mounted on the first shoring and the second shoring; FIG. 4 is a perspective view showing a clamp that grips the first shoring and the second shoring; FIG. 9 is a cross-sectional view showing steps performed by the shoring device according to the second embodiment of the present invention instead of the steps of FIGS. 7 and 8; It is a perspective view of a clamp used in the second embodiment. FIG. 10 is a cross-sectional view showing a step of installing the inclined first shoring in the existing pipe in the third embodiment of the present invention; FIG. 4 is a cross-sectional view showing a process of extending the first shoring and correcting the position and cross-sectional shape of the rehabilitation pipe. FIG. 4 is a cross-sectional view showing a step of installing a second shoring structure that intersects and slopes with the first shoring structure in the rehabilitation pipe, and connecting the second shoring structure to the first shoring structure with a clamp.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 10. FIG. In FIG. 1, reference numeral 1 denotes an existing pipe, such as a sewage pipe, which has deteriorated and is buried underground. The existing pipe 1 is configured by connecting concrete pipes, for example, and has a curved planar shape (curved when viewed from above).

A rehabilitation pipe 2 extending along the existing pipe 1 is arranged in the existing pipe 1 . The rehabilitating pipe 2 is constructed by, for example, spirally winding a belt-like member made of resin, and connecting the edges of adjacent wound portions by fitting and connecting them directly or via a connecting member. However, the rehabilitating pipe 2 may be constructed by other methods such as assembling segments. It is preferable to use a pipe-making machine when connecting the belt-like members.

In the natural state, the rehabilitated pipe 2 has a circular cross-sectional shape and extends straight. Deviate left and right. In some cases, it hits either the left or right side wall surface of the existing pipe 1, and the cross-sectional shape is crushed into a vertically long ellipse.

After placing the rehabilitation pipe 2 inside the existing pipe 1, the space between the existing pipe 1 and the rehabilitation pipe 2 is filled with a backing material such as mortar (not shown). The rehabilitating pipe 2 is reinforced to correct the shape and to resist the filling pressure of the lining material. Details will be described below.

Step of installing first shoring First, as shown in FIG. 3, the first shoring 10 is installed horizontally in the rehabilitation pipe 2 at predetermined intervals in the axial direction. The first shoring 10 includes a pipe 11 made of steel pipe or the like and a first jack 15 .

As shown in FIG. 9, the first jack 15 has a first member 16, a second member 17, and an adjusting member 18. As shown in FIG.
The first member 16 has a receiving plate 16a and a tube 16b having one end fixed to the receiving plate 16a. A cylinder 16 b is inserted into the pipe 11 .
The second member 17 has a support plate 17a and a threaded rod 17b having one end fixed to the support plate 17a. The threaded rod 17b is inserted into the support tube 16b of the first member 16 and into the pipe 11 as well. The walnut member 3 (see FIG. 3) is supported by the support plate 17a via a support fitting (not shown). The wale member 3 extends in the axial direction of the rehabilitation pipe 2 and bridges between the first shorings 10 arranged at intervals.
The adjustment member 18 has a nut portion 18a that is screwed onto the threaded rod 17b, and an operation portion 18b that protrudes radially outward from the nut portion 18a.

Returning to FIG. 3, a through hole 2a is formed in the right and left side walls of the rehabilitating pipe 2 farther from the direction of the central axis 1x of the existing pipe 1 (the left side wall in FIG. 3). With the first shoring 10 horizontal, the pipe 11 of the first shoring 10 is passed through the through hole 2a of the rehabilitation pipe 2, and one end 11a of this pipe 11 (the end opposite to the first jack 15; one end of the first shoring 10) is in contact with the left side wall surface of the existing pipe 1, the first jack 10 is extended to extend its support plate 17a (the other end of the first shoring 10) and the wale member 3. It hits the side wall on the opposite side (right side) of the rehabilitation pipe 2 through the hole.

Straightening Step Next, the first jack 15 is further extended against the elasticity of the rehabilitating pipe 2 . As a result, as shown in FIG. 4, the right side wall portion of the rehabilitation pipe 2 is pushed by the wale member 3 and moves rightward. When the first jack 15 is further extended, the left side wall of the rehabilitation pipe 2 separates from the left side wall of the existing pipe 1 . The pipe 11 is provided with a scale 11b (shown only in FIG. 4) for measuring the distance from one end 11a thereof. Extend 1 jack 15.
L = (D ₁ -D ₂ )/2
However, D1 is the inner diameter of the existing pipe ₁ , and D2 is the inner diameter of the rehabilitation pipe ₂ .
As a result, the center axis 2x of the rehabilitating pipe 2 is aligned with or approaches the direction of the center axis 1x of the existing pipe 1 when viewed from above, and the cross-sectional shape of the rehabilitating pipe 2 returns to its original circular shape or a state close to it due to its own elasticity. .

Step of installing second shoring Next, as shown in FIG. 5, the second shoring 20 is vertically installed in the rehabilitation pipe 2 at predetermined intervals in the axial direction. The second shoring 20 comprises a pipe 21 and a second jack 15'. Since the second jack 15' has the same structure as that of the first jack 15, the same reference numerals are given to the components, and the detailed description thereof will be omitted.

A through hole 2b is formed in the upper wall portion of the rehabilitating pipe 2. As shown in FIG. With the second jack 15' facing down, the second shoring 20 is made vertical, the pipe 21 of the second shoring 20 is passed through the through hole 2b of the rehabilitation pipe 2, and the upper end 21a of this pipe 21 (the second shoring 20 upper end) is applied to the upper wall surface of the existing pipe 1. Then, the clamp 30 connects the first shoring 10 and the second shoring 20 in a state of crossing each other at 90°. Further, the second jack 15 ′ is extended, and the support plate 17 a (lower end of the second shoring 20 ) is brought into contact with the bottom wall of the rehabilitation pipe 2 via the wale member 4 .

The clamp 30 is of a known type and has a first gripping portion 31 and a second gripping portion 32 having the same structure. These gripping portions 31 and 32 have gripping holes 31a and 32a whose central axes intersect with each other at 90°. , 21 can be grasped.

As shown in FIG. 6, by further extending the second jack 15', the wale member 4 presses the bottom wall of the rehabilitation pipe 2 against the bottom wall of the existing pipe 1, thereby fixing the rehabilitation pipe. 2 is fixed to the existing pipe 1. By gradually contracting the first jack 15 of the first shoring 10 in the process of extending the second jack 15', the rehabilitating pipe 2 can be deformed into an elongated ellipse, and the rehabilitating pipe can be deformed in the process of this deformation. 2 is supported stably.

Rehabilitating Pipe Shape Restoration Step Next, as shown in FIG. By moving the first shoring 10 downward, the restraint of the rehabilitation pipe 2 by the first shoring 10 is released. As a result, the rehabilitated pipe 2 returns to its original circular shape while the bottom wall is fixed to the existing pipe 1 by the second shoring 20 . The original circular shape may be the cross-sectional shape of the rehabilitated pipe 2 immediately after the rehabilitated pipe 2 is formed in the curved portion of the existing pipe 1, or the cross section of the rehabilitated pipe 2 in the straight portion of the existing pipe 1 that is not the curved portion. It may be in shape.

Rehabilitating pipe reinforcement step Next, as shown in FIG. The side walls are reapplied and the clamps 30 reconnect the first shoring 10 and the second shoring 20 . By further extending the first jack 15 , the wale member 3 is brought into contact with the right side wall of the rehabilitation pipe 2 . As a result, the shoring device 5 is completed, and the rehabilitation pipe 2 is reinforced.

Backing Material Filling Step Next, the space between the existing pipe 1 and the rehabilitation pipe 2 is filled with a backing material (not shown) such as mortar. At this time, the left side wall of the rehabilitation pipe 2 is penetrated and supported by the first shoring 10 and the right side wall is restrained via the wale member 3, and the upper wall of the rehabilitation pipe 2 is supported by the second shoring 20. Since the bottom wall portion is fixed to the bottom wall surface of the existing pipe 1 via the wale member 4, deformation of the rehabilitating pipe 2 due to the filling pressure of the lining material can be prevented. can be prevented from rising.
Since the rehabilitating pipe 2 is positioned at or near the center axis 1x of the existing pipe 1 when viewed from above, the lining material is filled substantially evenly on the left and right sides, and high strength can be ensured.
Further, since the cross-sectional shape of the rehabilitating pipe 2 is corrected to a circle or a shape close to a circle, a sufficient cross-sectional area for circulation can be secured.

Another embodiment of the present invention will now be described. In these embodiments, constituent parts corresponding to the preceding embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.
In the second embodiment shown in FIG. 11, a clamp 30' shown in FIG. 12 is used. This clamp 30' has a first gripping portion 31 and a second gripping portion 32 like the clamp 30 used in the first embodiment, but the first gripping portion 31 and the second gripping portion 32 are relatively It differs from the clamp 30 in that it is rotatable. The opposing pieces of the first gripping portion 31 and the second gripping portion 32 are rotatably connected to each other. As a result, the crossing angle of the gripping holes 31a and 32a and the crossing angle of the first support 10 and the second support 20 can be changed.

In the second embodiment, instead of the clamp 30 of the first embodiment, a clamp 30' in which the gripping portions 31 and 32 are relatively rotatable is used, and a through hole 2a' of the rehabilitation pipe 2 through which the first shoring 10 penetrates. is a long hole extending in the circumferential direction, the first shoring installation process shown in FIG. 3, the straightening process shown in FIG. 4, the second shoring installation process shown in FIG. A step similar to the wall fixing step is performed.

Rehabilitation Pipe Shape Restoration/Reinforcement Step Following the rehabilitation pipe bottom wall portion fixing step, as shown in FIG. 10 is moved downward, the first jack 15 is extended while rotating the first shoring 10 from the horizontal position, and the first shoring 10 is reattached to the second shoring 20 by the clamp 30' at the central axis of the rehabilitation pipe 2. connect. The first shoring 10 penetrates the left side wall of the rehabilitation pipe 2 at a position higher than the clamp 30'. One end 11a of the pipe 11 of the rehabilitating pipe 2 hits the left side wall of the existing pipe 1 at a position higher than the clamp 30', and the wale member 3 hits the right side wall of the rehabilitating pipe 2 at a position lower than the clamp 30'. there is As a result, the cross-sectional shape of the rehabilitating pipe 2 is restored to a circular shape, and the rehabilitating pipe 10 is reinforced by the shoring device 5, completing preparations for filling the lining material.
In the second embodiment, the first shoring 10 may be rotated and the first jack 15 may be extended without moving the connecting position by the clamp 30'.

13-15 show a third embodiment of the invention. In this embodiment, in the first shoring installation process shown in FIG. 13, the first shoring 10 is installed in the rehabilitation pipe 2 while being inclined from the horizontal plane. This angle of inclination is preferably less than 45°, for example about 30°. Others are the same as those of the first embodiment.
Next, in the correction step shown in FIG. 14, the first jack 15 of the first shoring 10 is extended to correct the position and cross-sectional shape of the rehabilitation pipe 2 .
Next, in the second shoring installation step shown in FIG. 15, the second shoring 20 is installed so as to be inclined from the vertical plane. The angle of inclination is preferably less than 45° to the vertical, for example approximately 30°, perpendicular to the first shoring 10 . Others are the same as those of the first embodiment.

In the third embodiment, the lining material is filled after the second shoring installation process shown in FIG. In this embodiment, since the rehabilitating pipe 2 is supported with respect to the existing pipe 1 at two positions higher than the central axis of the rehabilitating pipe 2, the rehabilitating pipe 2 can be stably supported when the lining material is filled. can.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit thereof.
The backing material may be filled after the second shoring installation step shown in FIG. 5 in the first embodiment.

INDUSTRIAL APPLICABILITY The present invention can be applied to correcting the position of a rehabilitated pipe placed in an existing deteriorated pipe such as a sewage pipe.

1 Existing pipe 1x Center axis of existing pipe 2 Rehabilitation pipes 2a, 2a', 2b Through hole 2x Center axis of rehabilitation pipe 3, 4 Wing member 5 Shoring device 10 First shoring 11a One end of pipe (first shoring end of work)
15 1st jack 15' 2nd jack 17a Support plate of 1st jack (other end of 1st shoring)
17a Support plate of second jack (lower end of second shoring)
20 Second shoring 21a Upper end of pipe (upper end of second shoring)
30, 30' clamp 31 first gripping portion 32 second gripping portion

Claims (9)

A rehabilitated pipe is arranged inside an existing pipe whose planar shape is curved, and in a state in which the rehabilitated pipe is horizontally deviated from the central axis of the curved portion of the existing pipe, a back wall is formed between the existing pipe and the rehabilitated pipe. A method for correcting the position of the rehabilitating pipe in the curved portion before filling with filling material,
A stretchable first shoring provided with a first jack is installed in the rehabilitation pipe in a horizontal or inclined position, and in this installed state, the first shoring is a pair of horizontally facing each other in the rehabilitation pipe. One end of the first shoring penetrates one of the side wall portions far from the center axis of the existing pipe, and one end of the first shoring hits one side wall surface of the existing pipe facing the one side wall portion, and the first shoring a first shoring installation step in which the other end of the shoring contacts the other side wall portion of the pair of side wall portions of the rehabilitating pipe via a waling member extending in the axial direction of the rehabilitating pipe;
Next, by extending the first support with the first jack, the other side wall portion of the rehabilitating pipe is pushed and moved toward the other side wall surface of the existing pipe, thereby causing the center of the rehabilitating pipe to move. a straightening step of matching or approaching the central axis of the existing pipe when viewed from above;
A rehabilitation pipe straightening method comprising: The one side wall portion of the rehabilitating pipe abuts the one side wall surface of the existing pipe, and the straightening step is performed in a state in which the cross-sectional shape of the rehabilitating pipe is deformed into an elongated ellipse. 2. The method of straightening a rehabilitated pipe according to claim 1, wherein the cross-sectional shape of the rehabilitated pipe is returned to the original circular shape or a shape close to a circular shape. Furthermore, following the correction process,
A telescopic second shoring provided with a second jack is installed in the rehabilitation pipe in a vertical or inclined position so as to cross the first shoring, and in this installed state, the second shoring is Penetrating through the upper wall of the rehabilitation pipe, the upper end of the second support hits the upper wall of the existing pipe, the lower end of the second support is aligned with the bottom wall of the rehabilitation pipe, in the axial direction of the rehabilitation pipe. 3. A second shoring installation step in which the first shoring and the second shoring are connected by clamps by contacting through another wale member extending to the The rehabilitation pipe straightening method described. the first shoring is horizontally arranged and the second shoring is vertically arranged;
Furthermore, following the second shoring installation step,
By extending the second shoring with the second jack while gradually contracting the first shoring with the first jack, the bottom wall portion of the rehabilitation pipe is pressed against the bottom wall surface of the existing pipe, thereby A rehabilitating pipe bottom wall portion fixing step of making the cross-sectional shape of the pipe a vertically long elliptical shape;
The first jack is further contracted to release the restraint of the rehabilitation pipe by the first shoring, the state of connection between the first shoring and the second shoring by the clamp is released, and the first shoring is removed. a rehabilitated pipe shape restoration step of restoring the cross-sectional shape of the rehabilitated pipe to the original circular shape or a shape close to a circular shape by moving downward;
The one end of the first shoring is applied to the one side wall surface of the existing pipe, the first shoring is extended by the first jack, and the other end of the first shoring is waled. a rehabilitating pipe reinforcing step of contacting the other side wall portion of the rehabilitating pipe via a member;
The rehabilitation pipe straightening method according to claim 3, characterized by comprising: A first gripping portion for gripping the first shoring and a second gripping portion for gripping the second shoring of the clamp are rotatable relative to each other. It is installed horizontally, and the second shoring is installed vertically in the second shoring installation step,
Furthermore, following the second shoring installation step,
By extending the second shoring with the second jack while gradually contracting the first shoring with the first jack, the bottom wall portion of the rehabilitation pipe is pressed against the bottom wall surface of the existing pipe, thereby A rehabilitating pipe bottom wall portion fixing step of making the cross-sectional shape of the pipe a vertically long elliptical shape;
By rotating the first shoring around the clamp and adjusting the length by the first jack, the one end of the first shoring is moved to the one side of the existing pipe at a position higher than the clamp. While abutting the wall surface, the other end of the rehabilitating pipe is brought into contact with the other side wall portion of the rehabilitating pipe via the wale member at a position lower than the clamp, thereby moving the rehabilitating pipe to the original circle or a rehabilitated pipe shape restoration/reinforcement step of restoring the rehabilitated pipe to a shape close to a circle and reinforcing the rehabilitated pipe;
The rehabilitation pipe straightening method according to claim 3, characterized by comprising: In the first shoring installation step, the first shoring is arranged at an angle of less than 45° with respect to the horizontal plane, and the one end of the first shoring is positioned higher than the central axis of the rehabilitation pipe. It hits the one side wall surface of the existing pipe, and the other end of the first support is attached to the other side wall portion of the rehabilitation pipe via the wale member at a position lower than the central axis of the rehabilitation pipe. hit,
3. In the step of installing the second shoring, the second shoring is inclined at an angle of less than 45° with respect to the vertical plane and installed in a posture perpendicular to the first shoring. The rehabilitation pipe straightening method described in . Before filling the gap between the existing pipe and the rehabilitation pipe arranged inside the existing pipe with the backfilling material, in the shoring device installed in the rehabilitation pipe,
a horizontal first shoring with a first jack; a vertical second shoring with a second jack; and a clamp connecting said first shoring and said second shoring;
The first shoring penetrates one side wall portion of a pair of side wall portions that face each other in the horizontal direction in the rehabilitating pipe, and one end of the first shoring faces the one side wall portion of the existing pipe. abutting one side wall surface, the other end of the first shoring abutting the other side wall portion of the rehabilitating pipe via a waling member extending in the axial direction of the rehabilitating pipe;
The second shoring penetrates the upper wall portion of the rehabilitation pipe, the upper end of the second shoring contacts the upper wall surface of the existing pipe, and the lower end of the second shoring contacts the bottom wall portion of the rehabilitation pipe. , strikes through another wale member extending in the axial direction of the rehabilitation pipe ,
A shoring device for a rehabilitation pipe , wherein the lower end of the second shoring presses and fixes the bottom wall portion of the rehabilitation pipe against the bottom wall surface of the existing pipe . Before filling the gap between the existing pipe and the rehabilitation pipe arranged inside the existing pipe with the backfilling material, in the shoring device installed in the rehabilitation pipe,
A first shoring inclined with respect to the horizontal plane with a first jack, a vertical second shoring with a second jack, and a clamp connecting the first shoring and the second shoring,
The clamp has a first gripping portion that grips the first shoring and a second gripping portion that grips the second shoring, and the first gripping portion and the second gripping portion are relatively rotatable. can be,
The first shoring penetrates one side wall of a pair of side walls facing each other horizontally in the rehabilitation pipe at a position higher than the clamp, and one end of the first shoring is at a position higher than the clamp. Abutting on one side wall surface of the existing pipe facing the one side wall portion, the other end of the first support is attached to the other side wall portion of the rehabilitating pipe at a position lower than the clamp in the axial direction of the rehabilitating pipe. hitting via a wale member extending to
The second shoring penetrates the upper wall portion of the rehabilitation pipe, the upper end of the second shoring contacts the upper wall surface of the existing pipe, and the lower end of the second shoring contacts the bottom wall portion of the rehabilitation pipe. 1. A shoring device for a rehabilitation pipe, characterized in that it abuts through another wale member extending in the axial direction of said rehabilitation pipe. Before filling the gap between the existing pipe and the rehabilitation pipe arranged inside the existing pipe with the backfilling material, in the shoring device installed in the rehabilitation pipe,
A first shoring with a first jack, inclined at an angle of less than 45° to the horizontal, and a second jack, inclined at an angle of less than 45° to the vertical and perpendicular to said first shoring. A second shoring and a clamp connecting the first shoring and the second shoring,
The first shoring penetrates one side wall portion of a pair of side wall portions that face each other in the horizontal direction in the rehabilitation pipe at a position higher than the clamp, and one end of the first shoring is higher than the clamp. A wale member extending in the axial direction of the rehabilitating pipe abuts against one side wall surface of the existing pipe at a position, and the other end of the first support is attached to the other side wall of the rehabilitating pipe at a position lower than the clamp. hit through
The second shoring penetrates the upper wall portion of the rehabilitation pipe, the upper end of the second shoring contacts the upper wall surface of the existing pipe, and the lower end of the second shoring contacts the bottom wall portion of the rehabilitation pipe. 1. A shoring device for a rehabilitation pipe, characterized in that it abuts through a waling member extending in the axial direction of said rehabilitation pipe.

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