JP2002038898A - Junction method of underground structure lining element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of connecting an underground structure lining element for shortening a time of connection between divided lining elements and for assuring a sufficient internal space of the element. SOLUTION: Splicing joint plates 10a, 10b are stationarily sited between a back end of a precedent separate lining element 4-1 and a forward end of a subsequent separate lining element 4-2 and, the element 4-1 is combined to the element 4-2 by joining the plates 10a, 10b and the elements 4-1, 4-2 with an adhesive 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a lining element for constructing an underground structure, and more particularly to a method for joining a lining element for constructing an underground structure.
When constructing an underground structure that crosses the running path by laying a large number of lining elements in parallel on the ground below the vehicle running path such as railroad tracks and roads, it is divided into multiple sections in the longitudinal direction. The present invention relates to a method for joining engineering elements.

[0002]

2. Description of the Related Art As one of the underpass construction methods for constructing an underground structure (tunnel) crossing a track, a road, or the like, a URT (Under) using a hollow box-shaped element made of steel.
Railway / Road Tunnelling
Method) is known. In this method, a large number of steel lining elements are arranged in parallel and sequentially penetrate into the ground, and then the ground part divided inside the element row is excavated, and the element row is used as an underground structure. is there.

[0003] Each lining element is divided longitudinally,
In the starting shaft, the succeeding divided element is joined to the preceding divided element, and is sequentially penetrated into the ground. Conventionally, a method of joining the divided lining elements has been adopted in which a joint fitting previously attached to each of the divided lining elements is sandwiched by an attaching plate and fastened by bolts and nuts.

[0004] The element may be driven by propulsion,
Generally, the vehicle is penetrated into the ground by traction, and the traction force increases as the traction distance increases, so that the load acting on the joint increases. As a result, the size of the joint fitting increases, and the number of joints also increases. For this reason, in the conventional joining method, not only a great amount of time is required for joining, but also the space inside the element is hindered, and the excavator may not be able to be pulled out.

[0005]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above technical background, and has the following objects. An object of the present invention is to provide a method of joining lining elements for building underground structures, which can shorten the time required for joining divided lining elements and can secure a sufficient internal space of the elements. .

[0006]

In order to achieve the above object, the present invention employs the following means. That is, the present invention relates to a method for joining a lining element which is divided into a plurality of pieces in the longitudinal direction and penetrates into the ground when constructing an underground structure, and wherein the pre-divided covering is previously penetrated into the ground. A method of joining a lining element for underground structure construction, comprising joining a rear end portion of a lining element and a tip end portion of a later dividing lining element that runs backward and penetrates the ground with an adhesive. It is in.

More specifically, an attachment plate is fixedly arranged between the rear end of the preceding divisional lining element and the tip end of the succeeding divisional lining element. By joining the lining element with the adhesive,
Each divided lining element is joined.

It is preferable that a frame-shaped sealing member is attached to the joining surface of the attachment plate, and the adhesive is injected into a space surrounded by the sealing member. Further, the contact plate is fixedly arranged on each of the inner surface and the outer surface of the joining portion, and the adhesive is injected into the gap on the contact plate side from an injection hole provided in one of the contact plates, This adhesive is allowed to flow through the communication hole provided in the divided lining element into the gap on the other attachment plate side, and the adhesive is discharged until the adhesive flows out from the confirmation hole provided in the attachment plate. It can also be injected.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a URT method performed using a lining element, and is an example of constructing an underground structure in a ground below a track 1. In the URT method, starting shafts 2
And an arrival shaft 3 are provided.
, Many steel lining elements 4 are sequentially penetrated into the ground in parallel.

[0010] Adjacent lining elements 4 are connected to each other at the time of penetration by joints (not shown) provided along the longitudinal direction. After penetration, each element 4
Concrete is poured into the inside, and the ground 5 inward divided by the element rows is excavated to construct an underground structure (tunnel) using the element rows. In general, the lining element 4 has a box shape, that is, a square cross section. However, as disclosed in JP-A-11-247579, a method using a square cross section and a U-shaped cross section is used. There is also.

The lining element 4 is divided into a plurality of parts in the longitudinal direction, and each divided lining element is joined by the starting shaft 2. FIG. 2 is a plan view schematically showing the joining method, FIG. 3 is a front view, and FIG. 4 is a side view. According to the present invention, the rear end portion of the preceding divided lining element 4-1 already penetrated into the ground while leaving only the rear end portion, and the subsequent divided lining element penetrated into the ground after trailing The contact plate 10 is disposed between the contact plate 10 and the front end of 4-2. The attachment plate 10 is made of the same steel as the element material, but if it has the same strength,
Other metallic materials can be used.

In this embodiment, there are two joining portions, that is, an upper portion and a lower portion of the element.
Are located on the inner and outer surfaces of each joint. Then, the attachment plate 10 and each of the divided lining elements are joined with an adhesive, so that the two divided lining elements 4-1 and 4-2 are joined.
Are joined together.

FIG. 5 et seq. Show details of the joining method, FIG. 5 is a plan view, FIG. 6 is a sectional view showing a state before the adhesive is injected, and FIG. 7 is a sectional view showing an adhesive injected state. Plates and bolts (not shown)
After the temporary joining with the nuts, the attachment plates 10a and 10b are arranged on the inner surface and the outer surface of the joining portion. And both attachment plates 1
0a and 10b are fixed by a plurality of countersunk bolts 11 penetrating the divided lining elements 4-1 and 4-2. Attached plate 10
As a means for fixing a and 10b, a hexagonal bolt can be used, but by using a flat head bolt as described above, the thickness of the joining portion can be reduced.

A frame-shaped sealing member 12 made of rubber or the like is fixed to the joining surface of the contact plates 10a and 10b. Therefore, the contact plates 10a and 10b are divided into separate lining elements 4-1.
, 4-2, voids 13a and 13b are formed. In order to secure a gap, the attachment plates 10a, 10b
A spacer 14 may be arranged between the lining element 4-1 and 4-2 as shown in the figure. Attached plates 10a, 10
b has an injection hole 15 and a confirmation hole 16 for adhesive, respectively, and one of the divided lining elements 4-1 is provided with a communication hole 17 communicating the gaps 13a and 13b.

An injection line (not shown) consisting of an injection machine loaded with an adhesive and an injection tube is connected to the injection hole 15,
A confirmation tube 18 is attached to the confirmation hole 16, and an adhesive 19 is injected into the gap 13a from the injection hole 15 as shown in FIG. Here, an acrylic adhesive or another material can be used as the adhesive. The adhesive 19 injected into the gap 13a also flows into the gap 13b via the communication hole 17. Then, when the outflow of the adhesive from the confirmation tube 18 is confirmed, the injection is completed, and thus the gaps 13a and 13b are filled with the adhesive.

According to the above embodiment, the attachment plates 10a,
A gap 1 between the base 10b and the divided lining elements 4-1 and 4-2
3a and 13b are formed, and an adhesive is injected into the gaps 13a and 13b, so that even if there is a plane error such as unevenness in the divided lining elements 4-1 and 4-2, this can be absorbed. The lining elements 4-1 and 4-2 can be firmly joined. Further, the joining by the adhesive is extremely simple, and the joining operation can be completed in a short time. In addition, even when the joining plates 10a and 10b are arranged on the inner surface and the outer surface of the joining portion and joined as in the above-described embodiment, the communication that connects the gaps 13a and 13b to the divided lining element 4-1. By providing the holes 17, the injection operation can be performed only once, and the bonding time can be reduced.

The thickness of the joint is determined by the contact plates 10a and 10a.
determined only by the thickness of b and the layer thickness of the adhesive 19,
Its thickness can be about 10 several millimeters,
Therefore, a sufficient space inside the element can be secured. Furthermore, when the shape of the underground structure has a circular portion, the posture of the element penetrating into the ground changes in angle from 0 to 90 degrees, but if the above joining method is applied, any penetration posture can be accommodated. And is not limited by the shape of the underground structure.

The above embodiment is merely an example, and the present invention can be variously modified. For example, in the above-described embodiment, the dividing lining elements are joined by arranging the contacting plates on the inner surface and the outer surface of the joining portion. However, the present invention may be applied to a case where the contacting plates are arranged on only one surface and joined. Is included in the concept of. However, from the viewpoint of securing strength against bending, the above embodiment is a desirable mode.

In the above-described embodiment, the injection hole 15 is provided in the abutment plate 10a on the inner surface side of the joining portion, and the confirmation hole 16 is provided in the abutment plate 10b on the outer surface side. Board 1
A confirmation hole may be provided at 0a and an injection hole may be provided at the attachment plate 10b.

[0020]

As described above, according to the present invention, the time required for joining the divided lining elements can be reduced, and a sufficient internal space of the elements can be secured.

[Brief description of the drawings]

FIG. 1 shows a U implemented with a lining element.
It is a vertical direction sectional view showing RT method.

FIG. 2 is a plan view schematically showing a joining method.

FIG. 3 is a front view of the same.

FIG. 4 is a side view of the same.

FIG. 5 is a plan view showing details of a joining method.

FIG. 6 is a sectional view of the same, showing a state before an adhesive is injected.

FIG. 7 is a cross-sectional view showing an injection state of an adhesive.

[Explanation of symbols]

 4-1 and 4-2: Dividing lining element 10a, 10b: Abutment plate 11: Countersunk bolt 12: Seal member 13a, 13b: Void 14: Spacer 15: Injection hole 16: Confirmation hole 17: Communication hole 18: Confirmation Tube 19: Adhesive

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kiyoshi Kuwahara, Inventor 2-2-2 Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72) Inventor Daisuke Mishima 2-2-2, Yoyogi, Shibuya-ku, Tokyo No. Tohoku Japan Railway Company (72) Inventor Keiichi Takamura 2-3-5 Misaki-cho, Chiyoda-ku, Tokyo Inside Tekkaken Construction Co., Ltd. (72) Inventor Shigetsugu Takeda 2-5-Misakicho, Chiyoda-ku, Tokyo No. 3 Inside Tekkaken Construction Co., Ltd. (72) Motoaki Kurisu Inventor 2-3-5 Misakicho, Chiyoda-ku, Tokyo (72) Inventor Tsutomu Takeda Tsutomu Takeda 1-4-4 Yurakucho, Chiyoda-ku, Tokyo No. 1 Electrochemical Industry Co., Ltd. (72) Inventor Hideya Soma 1-4-1 Yurakucho, Chiyoda-ku, Tokyo F-term (reference) 2D05 5 BB03 DA11 EB00 GC02 KB04 KB10

Claims (4)

[Claims] 1. A method for joining a lining element which is divided into a plurality of pieces in the longitudinal direction and penetrates a ground when constructing an underground structure, wherein the lining element is preceded and penetrated into the ground. A method of joining a lining element for underground structure construction, comprising joining a rear end of the element and a tip of a later divided lining element that is trailingly penetrated into the ground with an adhesive. 2. A rear end of the preceding divisional lining element,
A bonding plate is fixedly disposed between the leading end portion of the subsequent divisional lining element, and each of the divisional lining elements is joined by joining the attachment plate and each divisional lining element with the adhesive. The method for joining lining elements for building underground structures according to claim 1, wherein 3. An underground structure construction according to claim 2, wherein a frame-shaped sealing member is attached to the joint surface of said contact plate, and said adhesive is injected into a space surrounded by said sealing member. How to join the lining element. 4. An adhesive plate is fixedly disposed on each of an inner surface and an outer surface of a joining portion, and the adhesive is injected into an opening provided on one of the adhesive plates into the gap on the side of the adhesive plate. Then, the adhesive is allowed to flow into the gap on the other attachment plate side through the communication hole provided in the divided lining element, and the adhesive flows out from the confirmation hole provided in the attachment plate until the adhesive flows out. 4. The method for joining a lining element for underground structure construction according to claim 3, wherein an adhesive is injected.