JPH0941889A - Connecting structure for segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the speed and reduce the labor of work. SOLUTION: The connecting structure for a segment 100 is provided with a spin plate 11 and a frame body 20 connected to its peripheral edge section. Edge sections 21a, 22a of the frame body 20 are protruded on the inner face side of the segment 100, and many pin holes 21b, 22b are provided on the edge sections 21a, 22a. The edge sections 21a, 22a of the segment 100 and the edge sections 21a, 22a of the adjacent segment 100 are connected by connecting members 40 constituted of pins 41 inserted into pin holes 21b, 21b, 22b, 22b and clips 42 pinching the edge sections 21a, 21a, 22a, 22a connected by the pins 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a segment in which a cylindrical wall body is extended in the axial direction of an excavation hole, and more particularly to a segment that can speed up construction and save labor. Regarding joint structure.

[0002]

2. Description of the Related Art Generally, when constructing a tunnel, an excavation hole is formed and a lining is provided to support a wall surface of the excavation hole. A rectangular arc-shaped segment in plan view is used for this lining, and this segment is provided around the axis of the drilling hole and continuously in the axial direction to form a tubular wall body. To do. The tubular wall body serves as a lining for supporting the wall surface of the excavation hole.

FIG. 6 is a diagram showing a composite segment which is one of typical conventional segments.
0 means a frame 2 on the periphery of a steel skin plate 1.
And the concrete 3 is filled inside the frame body 2. Further, bolt holes 2c and 2d are formed at both ends (main girder plate 2a) in the axial direction of the excavation hole and both ends (joint plate 2b) in the circumferential direction of the frame body 2, respectively. A so-called bolt box 4, which is a space for mounting a bolt, is provided at a position corresponding to the bolt holes 2c and 2d on the peripheral edge of the concrete 3 inside.

The joining of the composite segment 10 is performed by inserting the bolt 8 into the bolt hole 2d of the joint plate 2b of the segments 10 and 10 which are adjacent to each other in the circumferential direction and fastening them by bolts. For the segments 10 and 10 that are adjacent to each other in the axial direction, bolts (not shown) are inserted into the bolt holes 2c of the main girder plate 2a and bolted.

[0005]

However, in the lining with such a segment 10, it takes a lot of time and labor to tighten the bolt 8 at each bolt fastening point. Therefore, it is difficult to further shorten the construction period. On the other hand, however, there is a growing demand for faster construction and labor saving.

In view of the above circumstances, it is an object of the present invention to provide a segment and a lining method using the segment which can further speed up construction and save labor.

[0007]

According to a first aspect of the present invention, there is provided a joining structure for a segment, comprising a frame body at a peripheral portion thereof, which is provided around a shaft line of a drilling hole and is continuously provided in the axial direction to form a cylindrical wall. A joint structure of segments forming a body, wherein an edge portion of a frame is projected on an inner peripheral surface side of the segment, and a large number of pin holes are provided along the edge portion on the edge portion of the frame body. The pin hole is aligned with the pin hole of the adjacent segment, and the edges of the frame bodies of both adjacent segments are connected to the pin and the edge of the frame body of both adjacent segments. It is characterized in that they are connected by a connecting member consisting of a clip that holds the parts.

Therefore, when the cylindrical wall is formed by surrounding the segments around the axis of the excavation hole and continuously connecting them in the axial direction, the segments are joined to each other at the edges of the frame which are aligned with each other. Since the pin of the connecting member can be inserted into the pin hole and the both edges can be held by the clips of the connecting member, the segment can be assembled easily and quickly.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the segment of the present embodiment is a synthetic segment 100 made of steel plate and concrete, and the synthetic segment 100 has a skin plate 11 made of steel. Skin plate 1
1, a rectangular steel plate is curved in an arc shape according to the curvature of the inner wall surface of the excavation hole 5 as shown in FIG. 1, and a rectangular frame body 20 is provided on the periphery of the skin plate 11. ,
As shown in FIG. 2, the outer surface side of the skin plate 11 is joined so as to form a concrete filled space S1. The concrete filling space S1 is filled with filling concrete 30. In addition, at the center of the inner surface 11a of the skin plate 11, the segment grip 1
2 is attached to the inner surface 1 of the skin plate 11
1a side, that is, the frame body 2 on the inner peripheral surface side of the composite segment 100
The edges 21a and 22a of 0 are projected inward from the inner surface 11a of the skin plate 11.

The frame 20 is made of steel, and has main girder plates 21 and 21 forming both ends in the axial direction of the excavation hole 5 (direction of arrows A and B in FIG. 1) and the circumference of the excavation hole 5 around the axis. The joint plates 22 and 22 form both ends in the direction (arrow C and D in FIG. 1).

A large number of pin holes 21b, 22b are provided around the edges 21a, 22a of the frame body 20 along the edges 21a, 22a. In the present embodiment, the edges of the main girder plate 21 are formed. The pin holes 21b are arranged at substantially equal intervals in 21a, and the pin holes 22b are arranged at substantially equal intervals at the edge portion 22a of the joint plate 22.

The composite segment 100 is provided around the axis of the excavation hole 5 (direction of arrows C and D in FIG. 1) and continuously in the direction of the axis (directions of arrows A and B in FIG. 1) to form a cylindrical wall body. 9
00 is formed and is in the axial direction (arrow A, B direction in FIG. 1)
The composite segments 100, 100 adjacent to each other press the main girder plates 21, 21 against each other. Also, the main girder plate 2
The pin holes 21b and 21b of Nos. 1 and 21 are aligned so as to communicate with each other, and the edge portions 21a and 21a of the main girder plates 21 and 21 are connected.
Are connected by a large number of connecting members 40. As shown in FIG. 3, the connecting member 40 is formed by bending a pin 41 that is inserted into the pin holes 21b and 21b and a metal rod that extends from the base end of the pin 41. Edge 21
It is composed of a clip 42 for sandwiching a and 21a.
The clip 42 is formed in a U-shape when viewed from the side as shown in FIG. 4, and elastically clamps it.

Further, as shown in FIG. 1, the composite segment 1 adjacent around the axis of the drill hole 5 (direction of arrows C and D in FIG. 1).
00 and 100 press the joint plates 22 and 22 against each other, and the pin holes 22a of the joint plates 22 and 22 are aligned so as to communicate with each other. Edges 22 of the joint plates 22, 22
a and 22a are connected by the same connecting member 40 as described above, that is, the pin 41 of the connecting member 40 is inserted into the pin holes 22b and 22b as shown in FIG.
The clips 42 of the joint plates 22 and 22 have edges 22a and 22a.
It holds a.

The composite segment 100 and the like have the above structure. An embodiment of a method of lining the excavation hole 5 using the segment 100 and the like shown in FIG. 1 will be described below.

First, the excavation hole 5 is excavated by a shield machine (not shown). This shield machine is well known, and after assembling the composite segment 100 with the rear erector, the ends of a large number of propulsion jacks also provided at the rear part are brought into contact with the front end of the assembled composite segment 100. The synthetic segment 100 receives a reaction force to propel the shield machine and excavate the face of the excavation hole 5 with the front cutter.

Assembly of composite segment 100 by an erector is generally illustrated in FIG.
Around the axis CT of the excavation hole 5 (directions of arrows C and D in FIG. 5) to form a ring 500, and as shown in FIG. 1, similarly to the side of the excavation direction of the ring 500 (direction of arrow A in FIG. 1). The ring 500 of FIG.
It is performed so as to extend in the direction of arrow A).

When the next ring 500 is to be continuously connected to the end surface of the existing tubular wall body 900, each composite segment 100 forming the end surface is formed in the excavating direction (see the figure) by a large number of propulsion jacks of the shield machine. It is prevented from separating in the direction of arrow A). Therefore, first, the next segment 100
The propulsion jack of the part that should be connected in series is shortened to form a segment installation space for one piece. Next, the erector is attached to the segment holding metal fitting 12 of the composite segment 100, and the erector transports the composite segment 100 to the space.

The main girder plate 21 of the composite segment 100 is pressed against the main girder plates 21, 21 of the composite segment 100, 100 forming the end face of the existing tubular wall 900.
The pin holes 21b, 21b of the main girder plates 21, 21 are arranged so as to coincide with each other.

Therefore, as shown in FIG. 3, the pin 41 of the connecting member 40 is inserted into the corresponding pin holes 21b and 21b of the main girder plates 21 and 21, and the clip 42 is inserted into the main girder plate 21 and 21. The edges 21a and 21a of 21 are fitted. Then, the main girder plates 21 and 21 are constrained by the pin 41 from moving in the direction orthogonal to the axis CT of the excavation hole 5 shown in FIG. 5, so that as shown in FIG. The attached composite segment 100 is axially illustrated in FIG.
Movements other than the direction of arrow A are restricted. Also, the main girder plate 2
Clips 42 shown in FIG. 3 prevent the movements of 1 and 21 in the direction of arrow A in FIG.

Also, the joined synthetic segment 100
Is pressed and supported on the tubular wall 900 side by the propulsion jack.

The subsequent composite segments 100 are also connected to the end surface of the tubular wall body 900 like the composite segment 100. At that time, the joint plate 22 of the composite segment 100 is brought into close contact with the joint plate 22 of the composite segment 100 previously provided, and is connected by the connecting member 40. The connection by the connecting member 40 is performed by the mutual main girder plates 2 described above.
Similar to the connection of 1 and 21, matched pin holes 22b and 22
As shown in FIG. 3, the pin 41 of the connecting member 40 is inserted into b and the clip 42 is inserted into the edge portion 22 of the joint plates 22 and 22.
a and 22a.

Thus, as shown in FIG. 5, after the seven composite segments 100 are provided around the key segment 110, the ring 500 is formed by fitting the key segment 110 into the last remaining gap.

Therefore, as shown in FIG. 1, the adjacent composite segments 100 are joined together by inserting the pin 41 of the connecting member 40 into the pin holes 21b and 22b as shown in FIG.
The clip 42 is connected to the main girder plates 21, 21 or the joint plate 22,
Since it is made by fitting it to the edges 21a, 21a, 22a, 22a of 22, it is possible to assemble the composite segment 100 much easier and faster than in the conventional case where bolts are fastened. . As a result, it is possible to speed up the construction and save labor.

Further, as shown in FIG. 5, a secondary lining 200 such as mortar spraying is applied to the inner surface side of the cylindrical wall 900. By this secondary lining 200, the connecting force between the adjacent synthetic segments 100, 100 is increased, and the strength of the tubular wall body 900 is increased. Therefore, the tubular wall body 90
It is possible to improve the strength of the lining consisting of 0 and the secondary lining 200, and thus to improve the yield strength of the tunnel.

In the segment 100 of the above-described embodiment, as shown in FIG. 2, the synthetic segment 100 in which the inside of the frame 20 is filled with the filling concrete 30 is used, but it is composed of the skin plate 11, the frame 20 and the like. It may be a steel segment.

The secondary lining 200 does not necessarily need to be sprayed with mortar, and it is needless to say that it may be of any type as long as the strength of the cylindrical wall 900 is improved.

[0027]

According to the first aspect of the present invention, the segments can be easily and quickly assembled, so that high-speed construction and labor saving can be achieved.

[Brief description of drawings]

FIG. 1 illustrates one embodiment of the segment of the present invention.

FIG. 2 is a front sectional view of the segment of FIG.

3 is a view showing a connecting member connecting the segments of FIG. 1. FIG.

FIG. 4 is a side view showing a clip of the connecting member of FIG.

5 is a front view showing a state where a tubular wall body is assembled by the segment of FIG. 1. FIG.

FIG. 6 is a diagram showing an example of a conventional segment.

[Explanation of symbols]

5 ... Excavation hole, 20 ... Frame body, 21a ... Edge portion, 21b ... Pin hole, 22a ... Edge portion, 22b ... Pin hole, 40 ... Connecting member,
41 ... Pin, 42 ... Clip, 100 ... Composite segment, 900 ... Cylindrical wall, CT ... Axis

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Okawa 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Corporation (72) Toshihiko Bessho 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Construction Co., Ltd. (72) Inventor Ei Takeshi 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Construction Co., Ltd.

Claims (1)

[Claims] 1. A joint structure of segments, which comprises a frame body at a peripheral edge thereof, is circumferentially provided around an axis of an excavation hole, and is continuously provided in the axial direction to form a cylindrical wall body. On the inner peripheral surface side, the edge portion of the frame body is projected, and in the edge portion of the frame body, a large number of pin holes are provided along the edge portion, and the pin hole is of an adjacent segment. An edge portion of the frame bodies of both of the adjacent segments which is matched with the pin hole, and a pin which is inserted into the pin hole and a clip which is connected to the pin and holds the edge portions of both of the frame portions of the adjacent segment. The joining structure of the segments is characterized by being connected by a connecting member made of.