JP2002089191A - Segment for tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment for a tunnel, enhancing workability by making a segment body lightweight, reducing costs, appropriately also serving as a pipe wherethrough a liquid flows, and optimally used to regenerate an existing sewer pipe buried in the ground in particular. SOLUTION: The segment for the tunnel is constituted in such a manner that many arc-shaped segment bodies 1 are coupled together while aligning in the peripheral and axial directions of the tunnel for the purpose of forming the peripheral wall of the tunnel. Each of the segment bodies 1, integrally formed of a synthetic resin, is provided with a peripheral wall part 2 forming the peripheral wall of the tunnel, an arc-side wall part 3 extended outward along the arc of the wall part 2, and an edge-side wall part 4 extended outward along the arc-side edge of the wall part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel segment formed by connecting a large number of arc-shaped segment bodies in a circumferential direction and an axial direction of a tunnel to form a circumferential wall of the tunnel. .

[0002]

2. Description of the Related Art Such a tunnel segment is constructed, for example, by sequentially assembling the segment bodies while excavating underground to form a peripheral wall of the tunnel to construct a sewer pipe, or a protective peripheral wall for high-voltage electric wires and various cables. Conventionally, the segment body is formed of steel, concrete, or the like, and a reinforcing wall is provided inside a peripheral wall forming a peripheral wall of the tunnel. .

[0003]

Therefore, in the conventional tunnel segment, the segment body is heavy, the workability is poor, and the cost is high. In addition, a reinforcing wall protrudes inside the tunnel peripheral wall. For example, in order to use the tunnel as a pipe for flowing liquid such as sewage, various problems such as additional work for smoothing the inner peripheral wall of the tunnel are required. was there.

The present invention focuses on such a conventional problem. The object of the present invention is to improve the workability by reducing the weight of the segment body, to reduce the cost, and to provide a pipe for liquid flow. It is an object of the present invention to provide a tunnel segment suitable for rehabilitation of an existing sewer pipe buried underground, in particular.

[0005]

[Structure] According to a first feature of the present invention, as shown in FIGS. 1 to 5, a large number of arc-shaped segment bodies 1 are arranged in the circumferential direction and the axial direction of a tunnel T. A tunnel segment configured to form a peripheral wall of the tunnel T by being connected side by side, wherein each of the plurality of segment main bodies 1 forms a peripheral wall portion 2 forming a peripheral wall of the tunnel T; An arc side wall portion 3 extending outward along the arc of the peripheral wall portion 2
And an end side wall portion 4 extending outward along the arc side end of the peripheral wall portion 2 and integrally formed of synthetic resin.

[0006] The characteristic structure of the invention of claim 2 is shown in Figs.
As illustrated in FIG. 7, a grout injection cylinder 5 for injecting grout G to the outside of the peripheral wall portion 2 is provided so as to extend integrally from the peripheral wall portion 2 to the outside.

[0007] The characteristic structure of the invention of claim 3 is shown in FIGS.
As illustrated in FIG. 2, an engagement concave portion 11 is provided on one end side of the arc-shaped end sides of the peripheral wall portion 2,
An engaging convex portion 12 is provided on the other end side, and the engaging concave portion 11 and the convex portion 12 are formed in shapes that can engage with each other.

[0008] As described above, reference numerals have been used to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

According to the first aspect of the present invention, each of the plurality of segment bodies forming the peripheral wall of the tunnel is connected to the peripheral wall forming the peripheral wall of the tunnel and the arc of the peripheral wall. Conventionally, it is provided with an arc-shaped side wall portion extending outward along the outer side and an edge side wall portion extending outward along the arc-side edge of the peripheral wall portion, and is integrally formed of synthetic resin. It is extremely lightweight and easy to construct compared to those made of steel pipe or concrete, and the cost is low.Moreover, the peripheral wall forming the peripheral wall of the tunnel is reinforced by the arc side wall and the end side wall. Therefore, the structure is relatively strong despite being made of synthetic resin. Since the arc-side wall and the edge-side wall for reinforcing the peripheral wall extend outside the peripheral wall, when the segment body is connected to form a tunnel, the arc-side and the edge-side wall are formed. The part is located outside the tunnel peripheral wall, and the inside of the tunnel is mainly located on the smooth peripheral surface part. Is unnecessary and effective, and when used for rehabilitation of existing sewer pipes buried underground, it becomes extremely rational.

That is, in the case of an existing sewage pipe with severe corrosion, it must be replaced with a new sewage pipe. To this end, the ground was excavated and the existing sewage pipe was removed, or a new sewage pipe was laid. Although ancillary work such as backfilling is required later, the use of the segment of the present invention makes it possible to rehabilitate the existing sewer pipe without requiring extensive ground excavation. Specifically, the peripheral wall of the tunnel is formed inside the existing sewer pipe using a segment body whose outer diameter is slightly smaller than the inner diameter of the existing sewer pipe when connected. Then, for example, a hole is formed in an appropriate location on the peripheral wall of the tunnel, and grout or the like is injected between the tunnel and the existing sewer pipe through the hole. In the grout injection portion, since the arc-side and end-side walls integrated with the peripheral wall of the segment body are located, when the grout hardens, via the arc-side and end-side walls, The peripheral wall of the segment body is firmly integrated with the existing sewer pipe.

In this way, since the outer periphery of the tunnel is reinforced by grout and the existing sewer pipe, even if the segment body forming the tunnel is made of synthetic resin, it can be applied to a large earth pressure or the like. Can compete sufficiently. Furthermore, by forming inside the existing sewer pipe,
Although the inner diameter of the tunnel is somewhat reduced, the peripheral wall is made of synthetic resin having a relatively small flow resistance, so that the flow velocity is higher than that of the existing sewer pipe, and it is possible to flow substantially the same amount of sewage per unit time. Therefore, even if the sewage pipe is severely corroded, it is possible to rehabilitate the sewage pipe without excavating the ground and effectively using the existing buried sewage pipe.

According to the characteristic structure of the second aspect of the present invention, the grout injection cylinder for injecting grout to the outside of the peripheral wall portion is integrally extended outward from the peripheral wall portion. By injecting grout using the grout injection cylinder, the grout can be reliably injected into a desired location, and when used for rehabilitation of the existing sewer pipe described above, the peripheral wall of the segment body is used. Can be more reliably integrated with the existing sewer pipe.

[0013] According to the characteristic configuration of the third aspect of the present invention, an engaging concave portion is provided on one end side of the arc-shaped both end sides of the peripheral wall portion, and an engaging convex portion is provided on the other end side. Is provided, and the engaging concave portion and the convex portion are formed in a shape that can be engaged with each other. Therefore, when connecting the segment body in the circumferential direction of the tunnel, the engaging concave portion and the convex portion are used. Thereby, the connection can be reliably performed in a predetermined posture, and in some cases, the segment bodies can be connected in the circumferential direction of the tunnel without using a connection tool such as a bolt or a nut.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tunnel segment according to the present invention will be described with reference to the drawings. This tunnel segment is used, for example, for rehabilitation of an existing sewage pipe buried underground, and as shown in FIG. 1, a large number of arc-shaped segment main bodies 1 are circumferentially and axially arranged. It is configured such that the peripheral wall of the tunnel T is formed by connecting them side by side. Each segment body 1
Are molded products made of synthetic resin, all the same size, and
As shown in FIG. 6, the peripheral wall portion 2 is formed in an arc shape so as to have a predetermined central angle α in a front view so as to form the peripheral wall of the tunnel T as shown in FIG.

As shown in FIGS. 2 to 5, outside the peripheral wall portion 2, it extends integrally along the arc of the peripheral wall portion 2,
Further, a pair of arc side walls 3 formed so as to have a predetermined central angle α and a pair of end side walls 4 integrally extending along the arc side end of the peripheral wall 2 are formed. The pair of arc side walls 3 and the end side walls 4 are connected so as to form a rectangular box having the peripheral wall 2 as a bottom. In the center of the peripheral wall portion 2, a cylindrical grout injection cylinder 5 for injecting grout outside the peripheral wall portion 2 is integrally provided, and extends outward from the peripheral wall portion 2; The bottom of the grout injection cylinder 5 is closed by the peripheral wall 2.

Outside the peripheral wall portion 2, one arc-side reinforcing wall portion 6 substantially parallel to the arc side wall portion 3 is integrally provided with the grout injection cylinder 5 positioned at the center. Both ends of the arc-side reinforcing wall 6 are connected to the side wall 4. Outside the peripheral wall portion 2, three first-side reinforcing wall portions 7, 8, 9 that are substantially parallel to the end-side wall portion 4, that is, the first reinforcing wall portions 7, 8 that are located substantially at the center of the arc of the peripheral wall portion 2. The end side reinforcing wall 7 is integrally provided with the grout injection cylinder 5 positioned at the center, and the first side reinforcing wall 7 and each end side wall 4 are connected to each other. The second and third edge-side reinforcing wall portions 8, 9 are integrally provided between them, and both ends of each edge-side reinforcing wall portion 7, 8, 9 are connected to the arc side wall portion 3, respectively. ing.

One of the pair of end side wall portions 4, which is located on the left side in FIGS. 4 and 5, is located slightly inside from the end edges of the pair of arc side wall portions 3. In other words, a part of both arc side walls 3 is configured to protrude from the end side wall 4, and a space 11 is formed between the protruding arc side walls 3 as an engagement recess. 4 and 5, an upper edge 10 for engagement is integrally connected to an outer edge of the other end side wall portion 4 located on the right side in FIG. 4 and FIG. An engagement protrusion 12 is provided as an engagement protrusion formed in a shape.

In the pair of circular arc side walls 3, a first notch 13 for connection opened to the inside is provided at an intermediate position between the second end side reinforcing wall 8 and the end side wall 4. ,
Slightly inside the arc side wall 3, first partition walls 14 having both ends connected to the second end side reinforcing wall 8 and the end side wall 4 are integrally provided. And
The first partition wall portion 14, the second end side reinforcing wall portion 8, the end side wall portion 4, and the outer edge of the circular arc side wall portion 3 form the first edge.
The first connection spaces 16 are formed integrally with each other by being integrally connected by the top plate 15.

In the pair of circular arc side walls 3, the first and third
In the middle position between the end side reinforcing wall portions 7 and 9, second notches 17 for connection opened to the inside are provided, and both ends are slightly inside the arc side wall portion 3. And second partition wall portions 18 connected to the third end side reinforcing wall portions 7 and 9 are integrally provided. The second partition wall portion 18, the first end side reinforcing wall portion 7, the third end side reinforcing wall portion 9, and the outer edge of the arc side wall portion 3
The second connection space 20 is formed inside each other by being integrally connected by the second top plate 19.

In short, the segment main body 1 has a peripheral wall 2 for forming a peripheral wall of the tunnel T, and outside the peripheral wall 2, an arc side wall 3, an end side wall 4, an arc side reinforcing wall 6, The end side reinforcing wall portions 7, 8, 9 and the grout injection cylinder 5 are integrally provided. In other words, the arc side wall portion 3, the end side wall portion 4, the arc side reinforcing wall portion 6,
The peripheral wall portion 2 is located inside the end side reinforcing wall portions 7, 8, 9 and the grout injection cylinder 5, etc., and strictly speaking, the first and second connecting spaces 16, 20 are formed in a portion. Except for this, the inner peripheral portion is entirely formed by the peripheral wall portion 2 and is entirely a molded product made of a synthetic resin, preferably a molded product made of a high-rigidity reinforced synthetic resin mixed with a reinforcing material such as glass fiber or carbon fiber. It is configured.

Next, a method for forming a tunnel T using the segment body 1 and rehabilitating an existing sewer pipe will be described. First, as shown in FIG. 6, in the existing sewer pipe P buried underground, the plurality of segment main bodies 1 are sequentially arranged in the circumferential direction using the space 11 of the segment main body 1 and the engaging projections 12. Engage and assemble annularly.
Then, by repeating the above, and sandwiching a sealing material (not shown) between the adjacent annular segment main bodies 1 and utilizing the first and second notches 13 and 17, the inner connecting space 1 is used.
The adjacent segment bodies 1 from 6, 20 are fastened to each other using a connecting tool such as a bolt 21 and a nut 22 (see FIG. 3).

In this way, a large number of segment bodies 1 are connected side by side in the circumferential direction and the axial direction of the tunnel T, and the tunnel T is constructed in the existing sewer pipe P. Then, an appropriate one is selected from the grouting cylinders 5 provided in each segment body 1, and a hole communicating with the grouting cylinder 5 is formed from the inside, and the drilled hole and grout injection are formed. The grout is injected from inside using the cylinder 5. The injected grout G is filled between the peripheral wall 2 of each segment main body 1 and the sewage pipe P as shown in FIG.
With the curing of the sewage pipe P, a tunnel T made of synthetic resin is formed inside the sewage pipe P in a state of being integrated with the sewage pipe P, and the sewage pipe P is rehabilitated. The first and second connection spaces 16 and 20 are formed by using
Will be closed from the inside.

[Other Embodiments] (1) In the above embodiment, an example in which the existing sewer pipe P is rehabilitated using the segment main body 1 has been described. Thus, it can be used for various purposes, such as constructing or rehabilitating pipes for passing various liquids or constructing protective peripheral walls for high-voltage electric wires and various cables.

(2) In the above embodiment, the example in which the grout injection cylinder 5 is provided outside the peripheral wall portion 2 has been described. However, the grout injection cylinder 5 is not absolutely necessary. Alternatively, the grout injection cylinder 5 may be omitted, and in this case, for example, a grout injection hole may be formed in an appropriate portion of the peripheral wall portion 2 and grout may be injected from the hole. Become. In addition, the space 1 as the engagement concave portion
The same applies to 1 and the engagement protrusion 12 as an engagement protrusion, and the embodiment can be performed without the space 11 and the engagement protrusion 12. In this case, for example, a connecting tool such as a bolt or a nut may be used. In this case, the segment body 1 is connected in the circumferential direction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a construction state of a tunnel.

FIG. 2 is a perspective view of the segment main body viewed from the outside.

FIG. 3 is a perspective view of the segment main body viewed from the inside.

FIG. 4 is a sectional view of a segment main body.

FIG. 5 is a plan view of a segment main body.

FIG. 6 is a front view showing a construction state of a tunnel.

FIG. 7 is a sectional view of a main part showing a construction state of a tunnel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Segment main body 2 Peripheral wall part 3 Arc side wall part 4 End side wall part 5 Grout injection cylinder 11 Engagement concave part 12 Engagement convex part T Tunnel

Claims (3)

[Claims] 1. By connecting a large number of arc-shaped segment bodies in a circumferential direction and an axial direction of a tunnel,
A tunnel segment configured to form a peripheral wall of the tunnel, wherein each of the plurality of segment bodies includes a peripheral wall portion forming a peripheral wall of the tunnel and an outer side along an arc of the peripheral wall portion. An arc-shaped side wall portion extending, and an end side wall portion extending outward along an arc-side end of the peripheral wall portion,
A tunnel segment integrally formed of synthetic resin. 2. The tunnel segment according to claim 1, wherein a grout-injecting cylinder for injecting grout to the outside of the peripheral wall portion is integrally extended outward from the peripheral wall portion. 3. An engagement concave portion is provided on one end side and an engagement convex portion is provided on the other end side of the arcuate side edges of the peripheral wall portion. The tunnel segment according to claim 1 or 2, wherein the projections are formed in shapes that can engage with each other.