JP2790957B2 - Segment ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a ring composed of segments.

[0002]

2. Description of the Related Art A ring of a segment used for a shield tunnel is usually constructed by assembling an A-shaped segment symmetrically in order from the bottom, then incorporating a B-shaped segment symmetrically, and finally inserting a K-shaped segment. Assembled. As a type of inserting the K-shaped segment, there are a standard type in which the ring is inserted from the center of the ring toward the outer periphery and an axial insertion type (hereinafter referred to as a wedge type) in which the ring is inserted in the axial direction of the tunnel. All three types of A type, B type and K type
It is necessary to prepare different types of segments, and when using a wedge type as the K-shaped segment, it is necessary to further change the shape of the left and right B-shaped segments. Taking into account the irregular shaped segments used for curve construction, it is necessary to prepare a large number of segments.

[0003]

The preparation of segments having a large number of shapes as described above hinders the efficiency of tunnel construction. The present invention reduces the types of prepared segment shapes.

[0004]

SUMMARY OF THE INVENTION The present invention has both wedge-type structural features and standard-type utilization efficiency, wherein the mutual segment joint surfaces are inclined with respect to the tunnel axial direction. A segment ring that can be assembled without using a K-type segment by using two B-type segments adjacent to each other , one type as an A-type segment, one type as a B-type segment, It is possible to assemble the segment ring only by preparing a total of two types of segments. Further, if the deformed segments are used in such a structure, the segments can be assembled even if the same deformed segments are left and right and up and down, so that the utilization efficiency is increased.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B show the configuration of a segment ring of a straight portion according to the present invention, wherein FIG. 1A is an elevation view and FIG.

[0007] Four A-shaped segments 1 of the same shape are assembled, one of the two B-shaped segments is incorporated with the left B-shaped segment 2A, and finally the right B-shaped segment 2 is assembled.
B is inserted from the face side to complete the assembly of the ring.
B of left B-type segment 2A and right B-type segment 2B
The joint surfaces connecting the mold segments mutually form the joint surface 3 in a shape inclined in the tunnel axial direction. In the standard segment, the left B-shaped segment 2A and the right B-shaped segment 2B have the same shape and can be interchanged.

FIG. 1 shows the structure of a segment ring.
1 type as A type segment, 1 type as B type segment
It has been described that a ring is constituted only by two types of segments having a total of two shapes. Since the deformed segment used for the curved portion of the tunnel has no K-shaped segment, it can be easily assembled regardless of the position where the maximum width or the minimum width is arranged.

The configuration of the segment ring according to the conventional method will be described with reference to FIGS. 2 and 3 for reference.

FIGS. 2A and 2B show the structure of a segment ring using a standard type K-shaped segment in a conventional method, wherein FIG. 2A is an elevational view and FIG. 2B is a plan view.

In this case, since the left B-shaped segment 2A and the right B-shaped segment 2B have the same shape, one type of B-shaped segment may be used, but the K-shaped segment 4 is required.

FIG. 3 shows the structure of a segment ring using a wedge-type K-shaped segment in a conventional method.
Is an elevation view and (b) is a plan view.

In this case, since the shapes of the left B-type segment 2A and the right B-type segment 2B are different, two types of B-type segments are required. In addition, a K-type segment 4 is required. Is inserted from the face side.

[0014]

According to the present invention, the types of the shapes of the segments constituting the segment ring can be reduced. Also, the deformed segments of this ring configuration can be assembled in any combination.

[Brief description of the drawings]

FIG. 1 shows a configuration of a segment ring of the present invention,
(A) is an elevation view and (b) is a plan view.

FIG. 2 shows a configuration of a segment ring using a conventional standard type K-shaped segment, wherein (a) is an elevation view,
(B) is a plan view.

FIG. 3 shows a configuration of a segment ring using a conventional wedge-type K-shaped segment, (a) is an elevation view,
(B) is a plan view.

[Explanation of symbols]

1 A segment, 2A left B segment,
2B · · · right B-shaped segment, 3 · · · joint surface, 4 · · K
Type segment

Claims (1)

(57) [Claims] 1. A plurality of A-type segments and two adjacent
B-type segment phase
Only the segment joint faces of each other are inclined with respect to the tunnel axis direction.
Beveled segment ring.