JPH10280887A - Segment for shield tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a strength equal to a segment body to a joint part by providing a connecting edge on an edge parallel to the central axis of a tunnel within the periphery of a segment, and mutually connecting the segments by a bolt and a female screw. SOLUTION: A segment 1 constituting a shield tunnel is formed of an edge orthogonal to the central axial direction of the tunnel and an edge parallel thereto. A connecting piece 2 is provided on the extension surface of the shell of the segment 1 in the edge parallel to the tunnel central axis of the segment 1. A plurality of bolts 3 are protruded on the connecting edge 2 toward into the tunnel inner surface, and bolt through-holes 4 are provided in corresponding positions of the corresponding adjacent segment 1A. The segments 1 and 1A are butted, and the bolts 3 of the connecting edge 2 are inserted through the bolt through-holes 4. They are fastened from the inside by female screws to integrate the both. The strength and number of pieces of the bolts and the female screws are regulated, whereby the strength and rigidity equal to the segment body can be imparted to the joint part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield tunnel segment.

[0002]

2. Description of the Related Art The structure of a conventional joint of a shield tunnel segment is shown in FIG. That is, a configuration is adopted in which a bolt hole is opened in a plane parallel to the tunnel central axis of the segment a, and after the sides of the segment a are abutted, the bolt b is penetrated from one side and the nut c is tightened on the other side. .

[0003]

In the conventional shield tunnel segment, the insertion of bolts and the tightening of nuts are performed from the inside of the tunnel as described above. Due to such restrictions, the joint portion of the segment could not obtain the same strength as the segment body. Such weaknesses are compensated for by staggered assembly so that the joints of adjacent segments are not concentrated at the same location.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a shield tunnel segment capable of obtaining the same strength as the segment body even at the joint portion. Aim.

[0005]

In order to achieve the above object, a shield tunnel segment according to the present invention is a segment constituting a shield tunnel,
Within the periphery of the segment, on the side parallel to the central axis direction of the tunnel, a connection side protrudes on the extension surface of the outer shell of the shield tunnel, and at the corresponding position of this connection side and the corresponding segment, It features a segment for a shield tunnel, which is provided with joining means by bolts and female screws.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a shield tunnel segment according to an embodiment of the present invention.

<A> Shape of segment The present invention relates to a segment 1 constituting a shield tunnel, which is generally formed in an arc shape. However, in the case of a rectangular tunnel, any shape such as a flat segment 1 or an L-shaped segment 1 may be used. .

<B> Connection side. When assembled as a tunnel, the segment 1 is formed by a side perpendicular to the central axis of the tunnel and a side parallel to the central axis direction of the tunnel. In this, the connection side 2 protrudes from the side parallel to the center axis direction of the tunnel. The connection side 2 is formed at a position and a state extended on the extension surface of the outer shell of the segment 1.

<C> Bolt type. At the corresponding position of the connection side 2 and the corresponding adjacent segment 1A, a joining means between the segments 1 and 1A is provided.
When a bolt is used as the joining means, for example, FIG.
As shown in (1), a plurality of bolts 3 project from the connection side 2 toward the inner surface of the tunnel. On the other hand, a bolt through hole 4
Open. The opening position of the through hole 4 is a position corresponding to the projecting position of the bolt 3.

<D> Female screw type. For example, when a female screw is adopted as a joining means between the segments 1 and 1A, a female screw 5 is formed inside the connection side 2 as shown in FIG. On the other hand, a bolt through hole 4 is opened at a position corresponding to the adjacent segment 1A corresponding to the segment 1.

<E> Connection of segment 1 (Bolt type) In the case of the bolt type, the segment 1 in which the bolt 3 is protruded from the connection side 2 is assembled first. Then, the adjacent segment 1A in a state where the segment 1A
Is assembled from the inside. At the time of assembling, as shown in FIG. 2, the bolt 3 is passed through the bolt through hole 4 of the adjacent segment 1A and tightened with another nut 6 from the inside. Thus, both can be firmly integrated.

<F> Connection of segment 1 (Female thread type) In the case of the female thread type, the segment 1 in which the female thread 5 is formed on the connection side 2 is assembled first. Then, the adjacent segment 1A is assembled from the inside in a state of abutting against the side of the segment 1. At the time of assembling, the position of the bolt through hole 4 and the position of the female screw 5 are matched as shown in FIG. Then, another bolt 7 is penetrated from the inside through the bolt through hole 4 and is fastened to the female screw 5 of the connection side 2.
Thus, both can be firmly integrated.

<G> Installation of a patch plate. In either case of the bolt type or the female screw type, if the backing plate 8 is attached from the inside and tightened with bolts and nuts, the two segments 1 and 1A are further strongly integrated.
Although only the outer periphery of the segment 1 is shown in the drawing for the sake of explanation, a reinforcing plate is actually mounted on the inner side, so that the backing plate 8 can be mounted via such a reinforcing plate. It is.

[0014]

According to the shield tunnel segment 1 of the present invention as described above, the following effects can be obtained. <A> By adjusting the strength and the number of bolts and female screws which are the joining means of the segments, the joints of the segments can be given the same strength and rigidity as the main body. <B> The neutral axis of the joint portion can be set to a position that is aligned with or close to the neutral axis of the segment. Therefore, it is possible to prevent the occurrence of eccentric bending caused by the tensile force, and it is possible to adopt a rational structure. <C> A rational design can be performed in accordance with the performance of the segment with respect to the sectional force expected to generate positive bending, negative bending, and the like. <D> When the segment is used as it is as a stress material for a large-scale structure, if the joint strength is lower than that of the main body, the overall strength is also determined by the strength of the joint. However, with the segment of the present invention, such a problem can be solved because the strength and rigidity of the joint portion can be set to the same level as the main body portion.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of a shield tunnel segment of the present invention.

FIG. 2 is an explanatory view of the assembled state.

FIG. 3 is an explanatory view of another embodiment.

FIG. 4 is an explanatory view of the assembled state.

FIG. 5 is an explanatory view of a conventional segment assembling state.

Claims (3)

[Claims] 1. A segment constituting a shield tunnel, wherein a connection side protrudes on an extension of a shell of the shield tunnel on a side parallel to a central axis direction of the tunnel within a periphery of the segment, A shield tunnel segment constructed by providing joining means with bolts and female screws at the connection side and the corresponding position of the corresponding segment. 2. A segment forming a shield tunnel, wherein a connection side protrudes from an extension of a shell of the shield tunnel on a side parallel to a central axis direction of the tunnel in a periphery of the segment, Bolts protrude from this connection side and bolt through holes are opened at the corresponding positions of the corresponding segments. 3. A segment constituting a shield tunnel, wherein a connection side protrudes on an extension surface of an outer shell of the shield tunnel on a side parallel to a central axis direction of the tunnel within a periphery of the segment, A female thread is formed inside this connection side, and a bolt through hole is opened at the corresponding position of the corresponding segment.