JP2003293697A - Tunnel lining segments and assembly method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To safely and stably assemble tunnel lining segments formed by disposing post tension system PC steel materials with connection devices at both ends in X-configuration. <P>SOLUTION: Newly installed segment pieces 100 are pressed against an existing segment ring 110 one by one from a heading side by shield jacks, PC steel materials disposed in X-configuration incorporated in the segment pieces 100 are connected to the PC steel bars 2a of the existing segment ring 110 and temporarily tensed and fixed. After the newly installed segment ring is assembled, the PC steel bars are normally tensed with a torque wrench for fixing. Thus the introduction of stresses into the propelling direction and circumferential direction of a tunnel and the fixing of the segment ring can be achieved simultaneously. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel lining segment and a method for assembling the segment.

[0002]

2. Description of the Related Art Conventionally, a tunnel lining segment which introduces prestress forms a segment ring, and a circumferential strand is inserted over one circumference, and a tension force is applied to the circumferential strand. The integral ring was formed by pressing it against the existing segment ring from the face of the face with a jack or the like to maintain its position, and connecting multiple rows of the integral ring in the tunnel propulsion direction.

At the time of forming the above-mentioned tunnel segment, (1) the segment is assembled while pressing it against the existing segment ring from the face of the face with a shield jack or the like, but the segment ring becomes stable only after the circumferential strand is inserted. However, there were unstable factors and it was a dangerous work. (2) Further, the propulsion direction is tense by inserting the tension members through the plurality of rows of segment rings, but the work is not easy. (3) Since the circumferential tension of the segment ring is performed at one location on the circumference, it takes time and effort to insert the circumferential strand, the notch provided in the segment of the fixing part is large, and strong heavy equipment is used for tension. It was necessary to attach a jack, and workability was poor.

[0004]

SUMMARY OF THE INVENTION The present invention makes use of the mechanically excellent characteristics of a segment in which PC steel material is arranged in an X shape in the tunnel propelling direction, and uses a plurality of bundles of PC steel material. It is an object of the present invention to develop a segment for tunnel lining that solves the above-mentioned stability problem, and to provide an improved technique for safely and stably assembling the segment ring.

[0005]

The present invention has been made to solve the above problems, and its technical means is to pass the X-direction in the tunnel propulsion direction through substantially the center of the segment.
The present invention provides a tunnel lining segment, which is provided with post-tension type PC steel material provided in a letter shape inside the segment and provided with connecting tools at both ends.
Here, “arranged in an X shape in the tunnel propelling direction” means that diagonal PC steel materials having the same positive and negative inclination angles with respect to the tunnel propelling direction are arranged in the segment development view, respectively. I ’m happy to belong
As for the entire segment, it means that the PC steel material is arranged so as to form a rhombic mesh.

The method of assembling this segment is as follows. That is, the PC steel material is arranged in an X shape in the tunnel propelling direction through the substantially central portion of the segment, and the tunnel lining segment provided with the connection at both ends of the PC steel material is used. Press the pieces one by one from the face side to the existing segment ring with the shield jack, connect the PC steel material embedded in the pressed segment piece to the PC steel material end of the existing segment ring, and put on temporary tensioning assumption, and then make a new segment for one round. After the ring is assembled, the PC steel material is permanently tightened and fixed by a torque wrench to simultaneously introduce and fix the stress in the tunnel propelling direction and the circumferential direction of the segment. Is the way.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic front view of a segment piece 100 according to one embodiment of the present invention. The segment piece 100 contains a PC steel material 2 in an X shape in the tunnel propelling direction, and a connecting tool 3 is provided at one end of the PC steel material 2. The segment pieces 110 of the existing segment ring adjacent to the segment piece 100 are in contact with the segment piece 100 in a staggered arrangement, and the PC steel materials 2 are arranged at positions where they can be connected to each other.

2 to 4 show an exemplary segment 100.
FIG. 6 is a process chart showing the assembling process of FIG. 2 to 4 show exploded views of the tunnel lining. As shown in FIG.
A new segment piece 100a is attached to the face of the existing segment ring 110. At this time, the excavating head 31 of the shield machine presses the segment piece 100a with the shield jack 33, and the PC is built in an X shape.
The steel material 2a is connected to the PC steel material 2a of the existing segment ring 110 using the electric torque wrench 34, and is temporarily tensioned. The cutting head 31 has a cutter bit 32 in contact with the face.

FIG. 3 shows a state in which another segment piece 100b is installed next to the segment piece 100a connected in FIG. Using the electric or air torque wrench 34, the P of the PC steel material 2 and the existing segment ring 110
The step of joining the C steel material 2a and temporarily tensioning it is the same as in FIG. Attach segment pieces one after another. In FIG. 4, one row of segment rings 100 is the existing segment ring 11
0 is connected to the PC steel material 2, and a tension force is introduced into the PC steel material 2 of the new segment ring 100 by the hydraulic torque wrench 43 or the like. In this way, proper prestress can be uniformly applied in the tunnel propelling direction and the circumferential direction of the segment.

[0011]

According to the present invention, the PC steel material is formed into an X shape in the segment piece and is connected to the existing PC steel material, so that the segment piece can be easily and safely connected to the existing segment ring and tensioned. it can. The segment piece can be fixed by temporarily tensioning the PC steel material. Since the tension is performed on the face side, no cutout is required on the inner surface of the segment. Each segment ring PC
By pretensioning the steel material, it is possible to reliably and uniformly introduce the pre-stress in the propulsion direction and the circumferential direction. Since the tension is performed with a torque wrench, the work required for the tension is simple and light, and there is an advantage that a small space is sufficient.

[Brief description of drawings]

FIG. 1 is a schematic front view of a segment piece of an embodiment.

FIG. 2 is an assembly process diagram of the segment piece of the embodiment.

FIG. 3 is an assembly process diagram of the segment piece of the embodiment.

FIG. 4 is an assembly process diagram of the segment piece of the embodiment.

[Explanation of symbols]

2 PC steel 3 connection device 31 drilling head 32 cutter bits 33 shield jack 34 Electric or Air Torque Wrench 43 Hydraulic torque wrench 100 new segment pieces 110 Existing segment ring

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuhiko Kinmori             Marunouchi 3-4-1 shares, Chiyoda-ku, Tokyo             Ceremony Company PS (72) Inventor Koji Ishii             Marunouchi 3-4-1 shares, Chiyoda-ku, Tokyo             Ceremony Company PS (72) Inventor Munetaka Ozeki             1-12-11 Yurakucho, Chiyoda-ku, Tokyo Stone             Kawashima Kenzai Kogyo Co., Ltd. (72) Inventor Hirohide Hashimoto             1-12-11 Yurakucho, Chiyoda-ku, Tokyo Stone             Kawashima Kenzai Kogyo Co., Ltd. (72) Inventor Masanori Wakabayashi             1-12-11 Yurakucho, Chiyoda-ku, Tokyo Stone             Kawashima Kenzai Kogyo Co., Ltd. F-term (reference) 2D055 GC03

Claims (2)

[Claims] 1. Arranged in the segment in an X shape with respect to the tunnel propulsion direction, passing through substantially the center of the segment,
A segment for tunnel lining, which is equipped with post-tensioning PC steel material with connecting tools at both ends. 2. A PC which uses the segment for tunnel lining according to claim 1 and presses each segment piece of a new segment ring from the face of the face to the existing segment ring with a shield jack and is built in the pressed segment piece. The steel material is connected to the end of the PC steel material of the existing segment ring and temporarily tensioned, and after the assembly of the new segment ring, the PC steel material is finally tensioned and fixed, and the stress in the tunnel propelling direction and the circumferential direction of the segment. A method of assembling a tunnel lining segment, characterized in that introduction and fixing are achieved at the same time.