JPH11152994A - Segment joint and connection structure of segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment joint wherein rationalization of segment assembling is contrived, the segment assembling can be automated and a cross section loss part is not formed in a segment. SOLUTION: The segment joint is provided with a female joint 22 provided on at least one end face of each end face 10a in opposition to adjacent segments 10, 10, and a male joint 24 fitted to the female joint 22. The male joint 24 has a ring-like gap 22a in which at least the interior part thereof is diameter- reduced, and the male joint 24 has a cylindrical fitting part 24a, which is fitted to the gap 22a in a state where at least the edge is diameter-reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment joint for connecting segments forming an inner wall of a tunnel such as a subway, a road, water and sewage, electric power, a communication road, a common ditch, and a segment using the segment joint. In the connection structure.

[0002]

2. Description of the Related Art FIG. 11 is an exploded perspective view of an example of a tunnel formed by using a conventional segment joint, and FIG.
13 is a sectional view taken along the line AA of FIG. In these figures, the segment 10 is formed of a rectangular reinforced concrete plate having a predetermined thickness, and the reinforced concrete plate is curved in an arc so as to form a part of a cylinder.

[0003] A joint plate 12 made of a steel plate is integrally provided at a predetermined interval at each end of the four circumferences of the segment 10, and a through hole 12 a is formed in the joint plate 12. Joint plate 12
When the segments 10 are assembled into a cylindrical shape, the segments 10 are provided at positions overlapping each other between the adjacent segments 10, 10, and the through holes 12 a are provided at positions communicating with the overlapping joint plates 12, 12.

At each end of the four circumferences of the segment 10, a core box 14 formed of a box-like depression is provided adjacent to the inside of the joint plate 12.

[0005] The segment 10 is assembled in a staggered cylindrical shape with a waterproof seal in the interior of a tunnel or the like, and a bolt 16 is inserted into a core box 14 on one side of the joint plates 12 from the inside. The screw part is inserted into the through hole 1 of the joint plate 12.
2a, and the other core box 1 of the joint plates 12, 12
The nut 18 is put in the screw 4 and screwed to the threaded portion of the bolt 16, and the bolts 16 can be connected and integrated by tightening.

[0006]

By the way, when the segment 10 is assembled in the conventional segment joint, the bolt and nut 16,
Since the fastening work of 18 had to be performed, the fastening work was very troublesome, and the work time accounted for a large proportion of the shield excavation work time, which was one of the causes of the rapid construction of the shield. Further, there is a problem that automation (mechanization) is difficult due to complicated operations.

Further, in the conventional segment joint, the core box 14 must be provided on the inner peripheral surface side of the segment 10. Therefore, when the segment 10 is a concrete segment, it has a structure having a cross-sectional defect, and furthermore, the reinforcing rod is used. However, there was a problem that the arrangement of the components was complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can streamline segment assembly, reduce assembling work time, and automate segment assembly. It is an object of the present invention to provide a segment joint that does not form a joint.

[0009]

According to a first aspect of the present invention, there is provided a segment joint for solving the above-mentioned problems, comprising: a female joint provided on at least one of the opposing end surfaces of an adjacent segment; The female joint has a ring-shaped gap, the gap has at least a reduced diameter at the back, the male joint has a cylindrical fitting portion, The fitting portion is fitted in the gap with at least the tip portion reduced in diameter.

[0010] Here, the female joint may be provided on each of opposing end faces of the adjacent segments, or may be provided only on one end face. When the female joint is provided on each of the end faces, it is necessary to provide fitting portions for fitting to the female joint at both ends of the male joint.

In the case where the female joint is provided only on one of the opposed end surfaces of the adjacent segments, the male joint is integrally implanted and fixed on the other end surface with a screw or the like in advance. It is necessary to provide a fitting portion for fitting to the female joint at the protruding tip of the male joint.

It is preferable that the male joint has a cut in which a fitting portion is formed in a longitudinal direction. The male joint can be formed of a synthetic resin. As the synthetic resin, for example, a polyamide resin can be used. Of course, it may be made of metal. The segment may be a concrete segment or a steel segment.

When the segment is a concrete segment, the female joint is formed of metal or synthetic resin, and the female joint is embedded in the end face of the concrete segment, or a hole is directly formed in the end face of the concrete segment. Once formed, this hole can be directly used as a female joint.

When the female joint is embedded in the end face of the concrete segment, the female joint is preferably supported on the concrete segment by an anchor embedded in the segment. When the female joint is directly formed on the end face of the concrete segment, the inner peripheral surface of the female joint is covered with a thin steel plate, and the concrete around the female joint is reinforced with a metal wire or made of synthetic resin. It is preferable that the female joint is embedded in concrete and similarly reinforced with a metal wire.

In the segment joint described above, the end faces of the segments adjacent to each other between the rings can be connected to each other. In this case, the end faces on the inter-piece side of the segments adjacent to the inter-piece side are formed stepwise so as to mesh with each other, and portions of the end faces facing in the inter-ring direction are connected to each other by the segment joint. May be connected.

[0016]

1 is an exploded perspective view of a part of an inner wall of a tunnel formed by using a segment joint according to one embodiment of the present invention, and FIG. 2 is a segment joint according to one embodiment of the present invention. FIG. 3 is an enlarged sectional view of a segment joint according to another embodiment of the present invention, and FIG. 4 is an explanatory view showing a state before connection of a segment joint according to one embodiment of the present invention. FIG. 5 is an explanatory view showing a state after connection of the segment joint according to the embodiment of the present invention.

The segment 10 is formed of a rectangular plate-shaped reinforced concrete plate having a predetermined thickness, and the reinforced concrete plate is curved in an arc shape so as to be connected in a cylindrical shape to form an inner wall of a tunnel. The rings between the segments 10 (in the axial direction of the tunnel) are connected by the segment joint 20 according to the present invention. A tenon is provided between the pieces (circumferential direction) of the segments 10 and fitted together. In some cases, only the pieces may be connected using a conventional segment joint.

The segment joint 20 according to the present invention comprises a pair of female joints 22 provided on the respective end faces 10a, 10a of the segments 10, 10 adjacent to each other between the rings.
And the adjacent segments 1 fitted to the female joint 22 respectively.
And a male joint 24 for connecting 0, 10 integrally.

The female joint 22 has a ring-shaped gap 22a, and the gap 22a is reduced in diameter at least at the back. The diameter may be reduced linearly, curvilinearly, or a combination thereof.
The female joint 22 may be formed by separately forming the outer peripheral portion 22b and the central portion 22c and welding them together, or by integrally forming the outer peripheral portion 22c and the central portion 22d by casting or the like. May be. Female joint 22 is anchor 2
8 may be supported inside the segment 10.

The male joint 24 is formed of a cylindrical member, and both ends are fitting portions 24a, 24a to be fitted to the female joint 22. The outer diameter of the fitting portions 24a, 24a is
Is substantially the same as the inner diameter near the entrance of the gap 22a.
In addition, the thickness of the fitting portion 24a is the gap 22a of the female joint 22.
It is slightly larger. A cut 24b is formed in the fitting portion 24a in a cross-section, for example, in the longitudinal direction. As the material of the male joint 24, a synthetic resin such as a polyamide resin can be used. Of course, the male joint 24 may be made of metal.

FIG. 6 is a sectional view of a segment joint according to another embodiment of the present invention. In this embodiment, the segment 10 is made of concrete, and the female joint 22 is made of a hole formed directly on the end face 10a of the concrete segment. The inner wall of the female joint 22 is covered with a thin steel plate, and the concrete around the female joint 22 is reinforced by a metal wire 22d.

FIG. 7 is a perspective view showing a segment joint according to still another embodiment of the present invention, and FIG. 8 is an explanatory view showing a case where a male joint is fitted to the female joint of FIG. In this embodiment, the segment 10 is a steel segment processed from a steel plate, and the female joint 22 is also formed from a processed steel plate. The female joint 22 is welded and integrated with the steel segment 10. The male joint 24 is the same as that of the above embodiment.

The segment joint 20 described above connects the segments 10 as follows. That is, first,
When the end face on the inter-ring side of one segment 10 approaches the end face on the inter-ring side of the other segment 10 with the male joint 24 interposed therebetween and the segment 10 is pressed, the female joint of both segments 10, 10 is pressed. Male joint 2 in gap 22
The four fitting portions 24a, 24a are inserted while their diameters are reduced, and the two segments 10, 10 are firmly connected. In addition, it is preferable to sandwich a water-stop seal (not shown) between the end faces of the segments 10, 10 in order to improve the water-stop performance.

FIG. 9 is a sectional view of a segment joint showing still another embodiment of the present invention. In this embodiment, one of the two segment pieces to be connected is fixed to the locking member 30 in advance by a "screw" on only one side. Similar effects can be expected in this embodiment.

FIG. 10 is an exploded perspective view of a part of an inner wall of a tunnel showing another embodiment in which pieces of a segment are connected by using a segment joint according to the present invention. The above-described segment joint 20 connects the end faces 10a, 10a on the inter-ring side of the segments 10, 10 adjacent on the inter-ring side, but as shown in FIG. The end faces of the segments 10, 10 between the pieces may be formed stepwise so as to mesh with each other, and portions of the end faces facing in the direction between the rings may be connected to each other by the segment joint.

[0026]

According to the first to twelfth aspects of the present invention, 2
By simply pressing the male joint between the two segments and pressing it, the fitting portion of the male joint deforms and penetrates into the gap between the female joints, and the two segments are connected. The operation is facilitated, and the construction period of the segment assembly is significantly reduced. Also, automation of segment assembly is facilitated.

Further, according to the first to twelfth aspects of the present invention, since the strength against the pulling force acting on the segments is very large, the connection of the segments is hardly loosened, and there are also problems of lowering the water stoppage and seismic resistance. There is no effect.

Further, according to the invention as set forth in claim 4 or 5, since the fitting portion of the male joint easily penetrates into the gap of the female joint, the segment can be easily and reliably formed without requiring a strong pressing force. There is an effect that it can be assembled.

Further, according to the present invention, even if a large force acts on the female joint, it is difficult for the female joint to come off from the segment, so that the segments supporting the female joint are firmly connected to each other. It has the effect of being connected.

According to the ninth aspect of the present invention, even if a large force acts on the female joint, the female joint is not easily broken.
There is an effect that the segments supporting the female joint are firmly connected to each other.

Further, according to the present invention, it is only necessary to overlap the segments in the tunnel axis direction (inter-ring direction) and press them.
There is an effect that the segment rings are easily connected to each other, and no manual fastening work is required.

Further, according to the present invention, there is an effect that the outer diameter of the female joint can be reduced and eccentricity can be easily dealt with.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a part of a tunnel inner wall formed using a segment joint according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a segment joint according to an embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a segment joint according to another embodiment of the present invention.

FIG. 4 is an explanatory view showing a state before connection of the segment joint according to the embodiment of the present invention;

FIG. 5 is an explanatory diagram showing a state after connection of the segment joint according to the embodiment of the present invention;

FIG. 6 is a sectional view of a segment joint according to another embodiment of the present invention.

FIG. 7 is a perspective view of a segment joint showing still another embodiment of the present invention.

FIG. 8 is an explanatory diagram of a case where a male joint is fitted to the female joint of FIG. 7;

FIG. 9 is a sectional view of a segment joint showing still another embodiment of the present invention.

FIG. 10 is an exploded perspective view of a part of a tunnel inner wall showing another embodiment in which pieces of a segment are connected by using a segment joint according to the present invention.

FIG. 11 is an exploded perspective view of an example of a tunnel formed using a conventional segment joint.

FIG. 12 is a partially enlarged view of FIG. 11;

FIG. 13 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 Reference Signs List 10 segment 10a end face 20 segment joint 22 female joint 22a gap 22b outer peripheral portion 22c outer central portion 22d metal wire 24 male joint 24a fitting portion 24b cut 28 anchor 30 locking member

Claims (12)

[Claims] 1. A female joint provided on at least one end face of opposing end faces of adjacent segments;
A male joint fitted to the female joint, the female joint having a ring-shaped gap, the gap having at least a reduced diameter at the back, and the male joint having a cylindrical fitting. A segment joint having a mating portion, wherein the fitting portion is fitted into the gap with at least a tip portion reduced in diameter. 2. The female joint according to claim 1, wherein a female joint is provided on each of opposing end faces of the adjacent segments, and the male joint has the fitting portions at both ends. Segment fitting. 3. A female joint is provided on one end face of the opposing end faces of the adjacent segments, and the male joint is integrally implanted and fixed on the other end face. The segment joint according to claim 1. 4. The segment joint according to claim 1, wherein a fitting portion of the male joint has a cut formed in a longitudinal direction. 5. The segment joint according to claim 1, wherein said male joint is formed of a synthetic resin or metal. 6. The concrete segment, wherein the female joint is formed of metal or synthetic resin, and the female joint is embedded in the end face of the concrete segment. Item 1
The segment joint according to any one of claims 1 to 5. 7. The segment joint according to claim 6, wherein an anchor is embedded in the concrete segment, and the female joint is supported by the concrete segment by the anchor. 8. The segment joint according to claim 1, wherein the segment is a concrete segment, and the female joint comprises a hole formed in the end face of the concrete segment. 9. The segment joint according to claim 8, wherein an inner peripheral surface of the female joint is covered with a thin steel plate, and concrete around the female joint is reinforced by a metal wire. 10. The segment joint according to claim 1, wherein the segment is a steel segment, and the female joint is formed integrally with the steel segment. 11. A segment connecting structure, wherein the end faces on the inter-ring side of the segments adjacent to the inter-ring side are connected by the segment joint according to claim 1. 12. An inter-piece end surface of a segment adjacent to an inter-piece side is formed in a stepped shape so as to mesh with each other, and a portion of the end surface facing the inter-ring direction is formed. A segment connection structure, wherein the segments are connected by the segment joint according to 10.