JP2000257390A - Segment for shield tunnel and shield tunnel lining using the segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a segment for a shield tunnel which can be joined without using a metal fitting. SOLUTION: A recess type connector 26 made of a resin is embedded in a segment main body and a ring joining end face on one side of this segment main body in the central direction of lining, while a projection type connector made of a resin which fits in with the recess type connector 26 is embedded in a piece joining end face on the other side. The recess type connector 26 is constituted of a female type tubular part 28 and an anchor part 29 formed integrally in the rear part of the female type tubular part 28, and it is embedded with the fore end of the female type tubular part 28 opened in the ring joining end face on one side. The projection type connector is constituted of a male type projecting part to be pressed in the female type tubular part 28 and of an anchor part formed integrally in the rear part of the male type projecting part, and it is embedded with the male type projecting part projected from the ring joining end face of the other side.

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 and a shield tunnel lining using the segment.

[0002]

2. Description of the Related Art In general, a shield tunnel is constructed by assembling circular arc segments obtained by dividing a lining shape having a circular cross section into a plurality at a rear end side of a shield excavator, and sequentially extending a circular ring lining in a tunnel axial direction. The shield excavator is propelled by applying a reaction force to this.

The conventional segment used in this type of shield tunnel is arc-shaped, and is a joining of the lining in a circumferential direction, that is, a joining of pieces and a tunnel of a lining ring which is extended in each bending process. The joint in the axial direction, that is, the joint between the rings is all performed by a rigid joint using bolts and nuts.

[0004]

Such a conventional shield tunnel segment requires a large number of metal fittings because the connection between the rings and between the pieces is connected by bolts and nuts, and the assembly process is difficult. There is a problem that it is difficult to perform automatic assembling due to a large amount of work, and the cost is high because it is necessary to insert-mold an anchor nut and a pipe for forming a bolt insertion hole with high precision.

An object of the present invention is to provide a shield tunnel segment that can be joined without using a metal fitting and a shield tunnel lining using the segment.

[0006]

The features of the shield tunnel segment according to the present invention for solving the above-mentioned conventional problems and achieving the intended object are as follows. A resin-made concave coupling tool having a female cylinder portion and an anchor portion integrally formed at a rear portion of the female cylinder portion on the joint surface between the rings, and a male press-fitted into the female cylinder portion. A resin-made convex coupling having a projection and an anchor formed integrally with a rear portion of the male projection; And the male hinge projection is buried in the convex hinge connector so as to protrude therefrom.

A concave fitting portion is provided on the segment body and a joining end face between the pieces in the lining circumferential direction of the segment body. It is preferable to provide a convex fitting portion made of resin that fits into the concave fitting portion.

[0008] When the concave hinge connector made of resin and the convex hinge connector made of resin are provided on the joint surface between the rings as described above, the joining can be performed by fitting the unevenness, and the automatic assembly can be performed. Will be possible. Further, when the concave connecting member and the convex connecting member are made of resin, they are not corroded, are lightweight, and can reduce the cost.

In addition, by providing a concave fitting portion and a convex fitting portion fitted to the concave portion on the joining end face between the pieces at both ends in the lining circumferential direction of the segment main body, it is possible to form a hinge by fitting unevenness. Yes, automatic assembly becomes possible.

A feature of the shield tunnel lining according to the present invention is a shield tunnel lining in which a lining ring assembled in a ring shape by a plurality of segment bodies is joined in a tunnel axial direction. A resin-made concave coupling tool having a female cylindrical portion and an anchor portion formed integrally with a rear portion of the female cylindrical portion on each ring joining surface on the tunnel axial side of the female cylindrical tube; A convex connector made of resin having a male protrusion press-fitted into the portion and an anchor portion integrally formed at the rear portion of the male protrusion; The male connector is press-fitted and connected to the female cylindrical portion by opening the tip of the male connector to the joint surface between the rings, projecting the male protrusion in the convex connector, and burying the male protrusion. It is in.

By providing the resin-made concave connecting member and the resin-made convex connecting member on the joint surface between the rings of the segment bodies as described above, the joint can be formed by fitting the concave and convex portions, and the shield tunnel cover can be formed. Automatic assembly of the work becomes possible. Further, when the concave connecting member and the convex connecting member are made of resin, they are not corroded, are lightweight, and can reduce the cost.

[0012]

1 to 11 show an embodiment of a shield tunnel segment and a shield tunnel lining using the segment according to the present invention. This example shows an example in which the present invention is applied to a polygonal shield tunnel lining.

As shown in FIGS. 1 and 2, the shield tunnel lining 1 of this embodiment has an outer shape formed into a regular decagon, and has four types of square segments, that is, three ordinary segments 2, 2. Segments 3a, 3b and 1
Each lining ring 1
a, 1a... are assembled respectively.

As shown in FIGS. 3 and 4, the ordinary segment 2 is composed of two adjacent flat surfaces 10 on the outer peripheral surface of the lining 1.
a, 10b on the outer surface side are formed in a mountain shape integrally having planar portions 11a, 11b.
The length of Ob is a length that constitutes the entire length of one side of the polygon on the outer surface of the lining 1.

As shown in FIGS. 5 and 6, similar to the above-mentioned ordinary segment 2, two segments 10a, 1 adjacent to each other on the outer peripheral surface of the lining 1
The outer surface of the lining 1 has a length corresponding to the total length of one side of the polygon of the outer surface of the lining 1. The length of the other flat portion 11a is approximately half the length of the one side,
The well 11a is longer on the wellhead side than on the face side.

Also, the other segment 3 for the final connection concave portion.
As shown in FIGS. 1 and 2, b is formed into a target shape with the above-mentioned segment 3a for the final connection concave portion, and the final connection segment insertion space a formed between both segments 3a and 3b has a face side. It is getting wider.

The final insertion segment 4 is the space a
The lining ring 1a is completed by inserting the lining 1a into the lining 1a as shown in FIGS.
Are formed in a mountain shape integrally with planar portions 11a and 11b having two adjacent flat surfaces 10a and 10b on the outer surface side of the outer peripheral surface of the two flat portions 11a and 1b.
The length of 1b is approximately half the length of one side of the outer surface of the lining 1, and each of the planar portions 11a and 11b is formed wider on the face side.

The joining surfaces 23a and 23b between the pieces at both ends are
Each is formed at the same angle as the radial direction of the lining 1, and a groove-shaped concave fitting portion 24 is formed on one of the inter-piece joint surfaces 23 a in the thickness direction toward the segment width direction. A convex fitting portion 25 having a shape that fits into the concave fitting portion 24 is integrally provided on the inter-joint surface 23b.

A pair of resin-made concave hinge connectors 2 are provided at the center sides of the inter-piece connecting surfaces 23a and 23b, respectively.
4a and a resin-made convex hinge connector 25a are embedded.

On the other hand, a concave connecting tool 26 and a convex connecting tool 27
And are buried.

As shown in FIGS. 9 (A) and 9 (B), the concave connecting member 26 is composed of a female tubular portion 28 and an anchor portion 29 formed integrally with the rear portion of the female tubular portion 28. The female cylindrical portion 28 is buried in one piece joint end face 23a with the tip end opened. On the inner periphery of the female cylindrical portion 28, two projecting portions 30 projecting inward are provided. The anchor part 29 is formed in a bottomed cylindrical shape.

As shown in FIGS. 10 (A) and 10 (B), the convex connector 27 has a cylindrical male projection 31 which is press-fitted into the female cylinder 28, and a rear part of the male projection 31. And the anchor portion 32 formed integrally therewith, and the male protrusion 31 is embedded so as to protrude from the joint end face 23b between the other pieces. The anchor part 32 is formed in a bottomed cylindrical shape.

The resin-made concave connector 26 described above is embedded in the joint surface 33a between the rings of one of the segments 2, 3a, 3b, 4 with the distal end of the female cylindrical portion 28 opened. . On the other inter-ring joint surface 33b, the above-mentioned resin-made convex connecting member 27 is embedded with its male protrusion 31 protruding.

The outer diameter of the male projection 31 is slightly larger than the inner diameter of the female cylinder 28.

Further, each segment 2, 3a, 3b, 4
Each of the joint surfaces 23a, 23b, 33a, and 33b has a groove 34 for fitting a sealing material in a continuous arrangement.

The assembling of the lining 1 using these segments 2, 3a, 3b and 4 is as shown in FIGS.
The concave fitting portion 24 and the convex fitting portion 25 are fitted on the inter-piece joint surfaces 23a and 23b of each segment to assemble them into a ring shape.

Thereafter, the lining ring 1a is extruded in the axial direction of the tunnel, and between the ring-to-ring joint surfaces with the previously assembled lining ring 1a, as shown in FIG. The male projection 31 of the convex connector 27 is press-fitted into the tubular section 28 to connect the male and female. At this time, since two protrusions 30 are protruded on the inner periphery of the female cylindrical portion 28, the outer periphery of the male protrusion 31 is compressed by the protrusions 30 and held so as not to be pulled out. .

[0028]

In the shield tunnel segment and shield tunnel lining according to the present invention, a resin-made concave connecting member and a resin-made convex connecting member are connected to the joint surfaces between the rings in the lining axial direction of the segment body. The fittings can be joined by fitting the concaves and convexes, and by connecting the lining rings by pressing the convex fittings into the concave fittings. This eliminates the need for such operations as bolting, and enables automatic assembly. Further, since the concave connecting member and the convex connecting member are made of resin, they are not corroded, are lightweight, and can be reduced in cost.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a shield tunnel lining according to the present invention.

FIG. 2 is a partially developed plan view of FIG.

FIG. 3 is a side view of an example of a rectangular segment according to the present invention.

FIG. 4 is a bottom view of the square segment shown in FIG. 3;

FIG. 5 is a side view of another example of the rectangular segment according to the present invention.

FIG. 6 is a bottom view of the square segment shown in FIG. 5;

FIG. 7 is a side view of still another example of the rectangular segment according to the present invention.

FIG. 8 is a bottom view of the square segment shown in FIG. 7;

FIG. 9A is a partially longitudinal side view of the concave connector used in this example, and FIG. 9B is a front view of FIG.

FIG. 10A is a front view of a convex connector used in the present example, and FIG. 10B is a partially longitudinal side view of FIG. 10A.

FIG. 11 is a partially longitudinal side view showing a fitted state of a concave connector and a convex connector used in the present example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield tunnel lining 1a ring 2 Ordinary segment 3a, 3b Segment for last connection concave part 4 Final insertion segment 10a, 10b Plane 11a, 11b Planar part 21 Ridge part 23a, 23b Joint surface between pieces 24 Concave part 24a Concave shape Hinge connector 25 Convex fitting portion 25a Convex hinge connector 26 Recessed connector 27 Convex connector 28 Female cylinder 29 Anchor 30 Projection 31 Male projection 32 Anchor 33a, 33b Joint surface between rings 34 Groove

Claims (3)

[Claims] 1. A resin-made concave connector having a female cylindrical portion and an anchor portion integrally formed at a rear portion of a male projecting portion on a joint surface between the rings on the tunnel axial direction side of the segment body. And a convex connector made of resin having a male projection press-fitted into the female cylindrical portion and an anchor formed integrally with a rear portion of the male projection. In the shield tunnel segment, the tip of the female cylindrical portion is opened to the joint surface between the rings, and the male protrusion is buried in the convex hinge connector. 2. A segment body, and a concave fitting portion is provided on a joining end face between one piece in a lining circumferential direction of the segment body, and the segment body is provided with a concave fitting portion on the other joining end face in a lining circumferential direction. The shield tunnel segment according to claim 1, further comprising a resin convex fitting portion that fits into the concave fitting portion. 3. A shield tunnel lining in which a lining ring assembled in a ring shape by a plurality of segment bodies is joined in a tunnel axial direction, wherein each of the ring joining surfaces on the tunnel axis direction side of the segment body is provided. A resin-made concave coupling tool having a female cylindrical portion and an anchor portion integrally formed at a rear portion of the female cylindrical portion; a male protrusion press-fitted into the female cylindrical portion; A resin-made convex coupling tool having an anchor part integrally formed at the rear part of the shaped projection part, and in the concave coupling tool, the distal end of the female cylindrical portion is opened to the inter-ring joint surface, A shield tunnel lining, wherein the male connector is press-fitted and connected to the female tubular portion with the male connector projecting and embedded in the convex connector.