JP2596680B2 - Segment joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment joining structure suitable for joining plate-shaped segments constituting a wall of a tunnel when a tunnel is constructed by a shield method or the like.

[0002]

2. Description of the Related Art The shield method is a method in which a ground is excavated by a shield machine, a number of concrete segments are installed on the inner surface of the ground behind the ground, and these are joined to each other to construct a tunnel.

[0003] The segment used is a plate-like body having a constant thickness that curves along the inner surface of the ground of the excavation hole, and its plan view shape is generally a rectangular shape such as a rectangle, but a hexagonal shape. Has also been adopted.

In recent years, there has been an increasing demand for flat finishing of the inner surface of the tunnel. For this reason, a long bolt for joining having male and female threads formed on both ends of the segment is penetrated in the joining direction. Techniques have been developed in which bolts are fastened by screw connection and no processing is required on the inner surface of the segment.

[0005]

However, if the joining surfaces of the segments are always in a direction orthogonal to the joining direction, the bolts penetrating the segments to be newly joined are different from the bolts passing through the existing segments. Fastening is possible because it is coaxial, but if the joining surface is slightly inclined, the new bolt will not be coaxial with the existing bolt, making it impossible to fasten Occurs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a joining structure of segments that enables fastening even when a new bolt is not coaxial with an existing bolt. The purpose is.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and a plate-like segment constituting a wall or the like of a tunnel is arranged between the first segments on the other side.
One end face of the second segment other respect (joining surface)
The bolts formed in the first segment are bolted through the through-holes extending in the direction of construction of the tunnel formed in the second segment by matching the end faces (joining surfaces) on the other side.
By fitting into the through hole extending in the construction direction of the
A structure in which the two segments are joined to each other, wherein the through hole has a diameter that allows the bolt to pass through, and a recess is formed on the surface to be joined of the through hole formed in the first segment; In this recess, the first segment
Supports the bolt penetrated by the formed through hole, and screws
A connecting member to which the member is detachably attached is provided.
The second member is attached to the screw member attached to the connecting member of
A bolt penetrated into a through hole formed in the segment is fastened.

[0008]

According to the present invention, since the joining surface of the other segment to which the existing first segment is joined is slightly inclined, the second segment newly joined to the bolt penetrating the first segment is formed. Even if the bolts penetrating through the second segment do not become coaxial, the bolts on the second segment side are fastened to the screw members unrelated to the bolts on the first segment side, so that the joining between the two segments can be performed. It is possible.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a plurality of segments 1 according to the method of the present embodiment.
The figure shows a case where a part of a cylindrical tunnel wall being constructed by joining is viewed from the inner surface side. Incidentally, the segments 1 in this case are hexagonal, symmetrical in the left and right (in the actual installation state, the front and rear direction of the tunnel) and vertically, and are joined to each other in a state where the left and right symmetry lines are aligned in the circumferential direction of the tunnel. .

In FIG. 1, the joining direction (tunnel construction direction) of each segment 1 is to the left, and the right and left sides of both end faces in the width direction of the segment 1 are joined to the joined surface 2. Bonding surface 3 to be formed.

As shown in FIG. 2, a through-hole 4 extending in the width direction (joining direction) is formed in the segment 1 by filling a steel pipe 5. In this case, the two through holes 4 are formed at equal distances from the upper and lower symmetry lines of the segment 1 with an interval therebetween. And
Around each through hole 4 of the surface 2 to be joined, a circular recess 6 is formed which slightly expands toward the surface 2 to be joined. At the bottom of the recess 6, a connecting member composed of a steel plate 7 having a hole 7a for opening the through hole 4 and a ring-shaped collar 8 having a threaded portion 8a formed on the inner periphery is embedded. ing.

Reference numeral 9 in FIG. 2 denotes a bolt used for joining the segments 1 together. The bolt 9 has a male screw portion 10 formed at one end of a bolt body 9 a and a bolt head 11 at the other end, and its length is substantially the same as the width of the segment 1. The diameter of the bolt body 9a is sufficiently smaller than the inner diameter of the through hole 4 (steel pipe 5). In other words, the through hole 4 is set to a diameter that allows the bolt body 9a to be in a loose state.

Reference numeral 12 in FIG. 2 denotes a disk-shaped block (screw member) into which the bolt 9 can be screwed. At the center of the block 12, a female screw portion 13 that fits with the male screw portion 10 of the bolt 9 is formed, and a screw portion 14 that fits with the screw portion 8 a of the collar 8 is formed on the outer periphery. In addition, a plurality of concave portions 15 for rotating the block 12 around an axis are formed on one end surface of the block 12.

The structure necessary for joining the segments 1 has been described above. The segments 1 are joined as follows. In FIGS. 1 and 3, a segment indicated by reference numeral 1A is an existing first segment, and a segment indicated by reference numeral 1B is newly joined to a second segment 1B.
Assume that the second segment 1B is joined to the first segment 1A. In the first segment 1A, a bolt 9 has already been passed through each through hole 4 as described below, and the first segment 1A has been joined to the right segment 1 in FIG. Head 1
1 is stored in the recess 6.

First, the concave portion 15 is directed to the surface 2 to be joined, and the block 12 is screwed into the collar 8 using the concave portion 15 and mounted. That is, the screw portion 14 of the block 12
Into the threaded portion 8a of the collar 8.

Next, the joining surface 3 of the second segment 1B
To the surface 2 to be joined of the first segment 1A, and while maintaining that state, a new bolt 9
a) is passed through each through hole 4 of the second segment 1B from the male screw portion 10 side. At this time, the bolt body 9a is passed through the washer 16 and the backing plate 17.

Then, the male screw portion 10 is screwed into the female screw portion 13 of the block 12 screwed into the collar 8 of the first segment 1A. Thereby, the head 1 of the bolt 9
1 is a plate 7 through a washer 16 and a backing plate 17.
, And the second segment 1B is
It is attracted in the direction A and both are joined.

Thereafter, the color 8 of the second segment 1B
Then, after the new block 12 is mounted, the next segment 1 can be joined in the same manner as described above.

According to the method of the present embodiment, first, the segments 1 are joined to each other by the bolts 9 penetrating the segments 1 over the joining surfaces 3 and the surfaces 2 to be joined, so that the inner surface of the flat tunnel wall is obtained. Can be.

Also, for example, the existing first segment 1
Since the joining surface of the segment to which A is joined is slightly oblique, the bolts 9 are accordingly adjusted as shown in FIG.
Is penetrated diagonally and newly joined segments 1B
Even if the bolts 9 do not become coaxial with the bolts 9, the new bolts 9 are fastened to the block 12 irrespective of the existing bolts 9, so that the segments 1 A and 1 B can be joined together. .

The bolt shown in the above embodiment,
The structure of the guide member, such as a fogger, is merely an example, and various changes can be made based on design requirements and the like.

[0022]

As described above, according to the segment joining structure of the present invention, the plate-like segments constituting the wall of the tunnel and the like are connected to each other with respect to the joining surface of one first segment to the other. Align the joining surfaces of the second segments,
A bolt penetrated through a through hole formed in the second segment and extending in the construction direction of the tunnel is attached to the first segment.
Fits in a through hole extending in the construction direction of the tunnel formed in
By engaged, a structure for joining the two segments together with the through hole is a diameter of the bolt and loosely fits state, a through hole formed in the first segment
Said the recess in the joining surface side formed, on the recess, before
The bolt penetrated through the through hole formed in the first segment.
Connection supporting the screw and detachably mounting the screw member
A member, and the screw attached to the connecting member.
The member penetrates through the through hole formed in the second segment
Characterized in that is a bolt is tightened, since the bonding surface of the other segments in which the first segment of the existing are joined is slightly skewed, were passed through the first segment bolts Even if the bolt penetrating the second segment to be newly joined does not become coaxial, the second segment can be used for a screw member unrelated to the bolt on the first segment side.
Since the segment side bolts are fastened, the two segments can be joined together.

[Brief description of the drawings]

FIG. 1 is a side view of a part of a cylindrical tunnel wall being constructed by joining a plurality of segments according to an embodiment of the present invention, as viewed from an inner surface side.

FIG. 2 is a sectional view showing a bolt penetrating through a segment and a block mounted in a recess.

FIG. 3 is a cross-sectional view showing a state where segments are joined together.

FIG. 4 is a cross-sectional view showing a state where a second segment is joined to a first segment in which a bolt is inclined.

[Explanation of symbols]

 1A 1st segment 1B 2nd segment 2 Joined surface 3 Joining surface 4 Through hole 6 Depression 9 Bolt 12 Block (screw member)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Munetaka Ozeki 2-6-21 Yaesu, Chuo-ku, Tokyo Rose Bay Yaesu Building Inside Ishikawajima Building Materials Co., Ltd. (72) Inventor Hiroki Someya 2-chome Yaesu, Chuo-ku, Tokyo No. 6-21 Rose Bay Yaesu Building Ishikawajima Building Materials Co., Ltd. (56) References JP-A-51-78036 (JP, A)

Claims (1)

(57) [Claims] 1. A plate-shaped segment forming a wall of a tunnel or the like is connected to the other end of one of the first segments.
One side of the other second segment with respect to the surface (surface to be joined)
End faces (joining surfaces) of the tunnels formed in the second segment and passed through through holes extending in the construction direction of the tunnel, and bolts of the tunnel formed in the first segment
A structure in which both segments are joined to each other by being fitted into a through hole extending in the construction direction , wherein the through hole has a diameter that allows the bolt to pass freely, and a through hole formed in the first segment. The joints of
A recess is formed on the surface side, and the first segment is formed in the recess.
Supports the bolts penetrated by the through holes formed in the
And a connecting member to which the screw member is detachably attached,
Further, the screw member attached to the connecting member,
A segment joining structure, wherein a bolt penetrated in a through hole formed in the second segment is fastened.