JPH0658095A - Segment connection of shield tunnel - Google Patents

Abstract

(57) [Abstract] [Purpose] It is a method to easily connect the shield tunnel segments. [Structure] This is a method of applying adhesive to the joint surfaces of the shield tunnel segments to connect the segments to each other. [Effect] The segment connecting process is simplified, and the segment structure is also simplified.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to connecting segments in shield tunnels.

[0002]

2. Description of the Related Art Conventionally, in a method for connecting segments in a shield tunnel, joints / metal fittings or bolt boxes are provided on the segments, and the segments are connected by bolts and nuts. At this time, in order to prevent water from flowing in from the segment connecting surface, a water blocking sealing material was attached to the segment connecting surface.

[0003]

Problems to be Solved by the Invention The prior art has the following problems. <B> In order to connect the segments by tightening them with bolts and nuts, it is necessary to align the bolt holes with each other and tighten the nuts there. This work had to be done for all the bolts, and the work was difficult. <B> It takes a long time to connect the segments to each other, and it is not possible to perform the forward work until the work is completed, which requires a long construction period. The larger the tunnel, the larger the number of bolts and the longer the excavation cycle. <C> It is difficult to mechanize segment connection work such as bolt hole alignment and nut tightening. <D> The structure of the segment is complicated because a joint, a metal fitting, and a bolt box are provided in the segment.

[0004]

It is an object of the present invention to provide a method for easily connecting segments in a shield tunnel. Another object of the present invention is to provide a method for connecting segments that does not require a seal for stopping water in a shield tunnel. It is another object of the present invention to provide a segment connecting method in which the segment structure of the shield tunnel is simple.

[0005]

According to the present invention, in a segment connecting method for a shield tunnel, a segment is arranged in the peripheral portion of the excavated ground, and an adhesive is applied to the joint surface of the segment to connect the segments. This is a segment connection method for shield tunnels.

[0006]

Embodiments of the present invention will be described below with reference to FIGS. <a> Shield tunnel 1 In FIG. 4, the ground is excavated by the cutter 6, and the segment 2 is assembled around the excavation periphery to form the shield tunnel 1.
Build and go. The segment 2 is arranged around the excavation periphery to construct the segment ring 3, and further excavation is performed to crimp the segment 2 to the adjacent segment ring 3. At that time, by extending the shield jack 5, the segment is crimped to the existing segment ring 3 in the axial direction of the tunnel. In FIG. 1, the joint portion of the segment ring 3 is arranged in a zigzag pattern with the segments 2 displaced from each other.

<B> Segment 2 The segment 2 has an A segment 1 whose joint surfaces are radial.
1, 21, the K segments 13, 23 inserted at the end of the assembly of the segment ring 3, and the B segments 12, 22 inserted between the A and K segments. Fig. 2 shows the closing method in the cross section of the K segment,
The K segment 13 is formed in a V shape so that both joint surfaces are narrowed outward so that the K segment 13 can be inserted into the segment ring 3 from the inside direction of the tunnel. When the K segment 13 is inserted, both the adjacent B segments 12 are spread out to give an axial force in the segment ring direction. FIG. 3 shows an axial insertion and closing method of the K segment, and the K segment 23 is inserted from the axial direction of the tunnel at the end of assembling the segment ring 3. When the K segment is inserted, the adjacent B segment is spread out and an axial force is applied in the segment ring direction.

<C> Connection between segments An adhesive is applied to the joint surface of the segment 2 to connect the segments to each other. When the adhesive is present on the joint surface and the segments are pressure-bonded to each other, the adhesive is spread over the joint surface, and the adhesive adheres to the entire joint surface. As a result, the connection of the segments is strengthened, and the function of stopping water is also performed at the same time. Therefore, it is not necessary to attach a seal for stopping water. Further, it is not necessary to provide a joint / metal fitting or a box on the segment, and fixing work with a bolt / nut for connecting these is not necessary, so the work is extremely simple. The adhesive is suitable for adhering concrete to each other, steel to each other, or concrete to steel, and preferably has a short curing time.

[0009]

As described above, the present invention can obtain the following special effects. <A> Just attach the adhesive to the joint surface of the segment,
Since the segments can be connected to each other, the work process of the segments can be extremely shortened. <B> Since it is not necessary to provide a fitting, a metal fitting, or a box on the segment, the structure of the segment is simplified. <C> Since the segment connecting process is simplified, the shield tunnel work process is easily mechanized. <D> Adhesion of segments and water blocking can be performed in one operation.

[Brief description of drawings]

FIG. 1 is a three-dimensional view of a shield tunnel.

FIG. 2 is a structural diagram of a segment ring.

FIG. 3 is a structural diagram of another segment ring.

FIG. 4 is a construction diagram of a shield tunnel.

Claims (1)

[Claims] 1. A shield tunnel segment connecting method, wherein a segment is arranged in a peripheral portion of an excavated ground, an adhesive is applied to a joint surface of the segment, and the segments are connected to each other. Segment connection method.