JPH08135385A - Buried joint of rc segment for lining shield tunnel - Google Patents

Abstract

PURPOSE: To provide a buried joint of an RC segment for shield tunnel lining process which makes it possible to mechanize the assembling of the RC segment, and forms no defective part in the section to the RC segment. CONSTITUTION: This buried joint is used being buried in an RC segment for shield tunnel lining process, and it has a female type fitting body 22, a male type fitting body 24 fitted to the female type fitting body 22, and a driving mechanism 26 to move forward and backward the male type fitting body 24 to the female type fitting body 22. The female type fitting body 22 is provided in one side RC segment 10, while the female type fitting body 24 and the driving mechanism 26 are provided in the neighboring other side RC segment 10. The female type fitting body 22 and the male type fitting body 24 are opposed through a border between a pair of RC segements 10 and 10, and at least a part of the operating part 40 of the driving mechanism 26 is exposed to a space at the inside of the other side RC segment 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield tunnel lining RC segment used for the construction of subways, roads, water and sewage systems, electric power, communication roadways, common ditch, etc. There are also)) joints.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional shield tunnel lining R
FIG. 8 is a partial perspective view showing a part of RC segments connected using a joint of C segment, and FIG. 8 is a sectional view taken along the line AA of FIG. 7. As shown in these drawings, the shield tunnel lining RC segment 10 is formed of a rectangular plate-like body having a predetermined thickness, and is curved in an arc shape so as to form a part of a cylinder.

Joint plates 12 made of steel plates are integrally provided at predetermined intervals at each of four ends of the RC segment 10.
Through holes (not shown) are formed in the joint plate 12.
The joint plates 12 are provided at positions where the adjacent RC segments 10 and 10 overlap each other when the RC segments 10 are assembled into a tubular shape, and the through holes overlap.
It is provided at a position where they communicate with each other.

At each of the four ends of the RC segment 10,
A core box 14 formed of a box-shaped recess is provided adjacent to the inside of the joint plate 12.

The RC segment 10 is assembled into a tubular shape inside a tunnel or the like, a bolt 16 is inserted into the core box 14 on one side of the joint plates 12, 12 from the inside, and the threaded portion of the bolt 16 is attached to the joint plate 12. Pass through the through-holes to obtain joint plates 12, 12
It is possible to connect and integrate the nut 18 into the other core box 14 by screwing the nut 18 into the screw portion of the bolt 16 and tightening.

[0006]

In the conventional joint described above, when assembling the RC segment, the bolts and nuts must be fastened in a narrow core box, so the fastening work is very troublesome. There is a problem that the automation (mechanization) is difficult.

Further, in the conventional joint, since the core box has to be provided on the inner peripheral surface side of the RC segment, RC
The segment has a structure with a cross-section defect,
Further, since the rebar is arranged by removing the defective portion, there is a problem that the RC segment may be cracked.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a joint which allows mechanization of the assembly of the RC segment and does not form a cross-section defect in the RC segment.

[0009]

An embedded joint for a shield tunnel lining RC segment according to claim 1 for solving the above problems is used by being embedded in a shield tunnel lining RC segment. A female fitting body, a male fitting body fitted to the female fitting body, and a drive mechanism for moving the male fitting body forward and backward toward the female fitting body. The combined body is provided in one RC segment, the male fitting body and the drive mechanism are provided in the other adjacent RC segment, and the female fitting body and the male fitting body are in the pair of RC segments. And an operating portion of the drive mechanism is exposed to a space inside the other RC segment.

Here, a male fitting portion is provided at the tip of the male fitting body, a rod-shaped body is extended to the rear side of the male fitting portion, and a screw portion and a worm wheel portion are provided on the rod-shaped body. And rotatably supporting the threaded portion on a nut-shaped metal fitting attached to the RC segment directly or via another member, and meshing one or more worms of the drive mechanism with the worm wheel portion, The operation portion may be connected to the worm.

In this case, even if the worm is rotated with a small force, the worm wheel portion, and by extension, the male fitting body, is swiftly rotated and can be moved forward and backward toward the female fitting body.

A pair of worms may be meshed with the worm wheel portion so that the worm wheel is held. It goes without saying that the worm wheel portion can be rotated even with one or more worms. When the worm wheel portion is meshed so as to be sandwiched by the pair of worms, when the worm rotates, the worm wheel portion has a good balance with respect to the worm, and the rotation is smoother. It should be noted that the pair of worms are designed to rotate in opposite directions.

The pair of worms may be driven and rotated separately. Furthermore, of the pair of worms,
One worm may be rotated (free rotation) with respect to the worm wheel in an idle state.

Further, the male fitting body may be housed in a case covering the male fitting body. In this case, the male fitting and the drive are protected from the concrete forming the RC segment.

The nut-shaped metal fitting may be supported by the case. In this case, the nut-like metal fitting is reliably supported in the RC segment.

The case may be connected and supported by an anchor fixed in the RC segment. In this case, the case is securely supported in the RC segment.

Further, it is preferable that the end portion of the operating portion has a polygonal shape. In this case, the operating portion can be easily rotated with a wrench or the like.

[0018]

In the invention according to claim 1, when the operating portion of the drive mechanism is operated in one direction, the male fitting body is moved forward by the driving mechanism and fitted into the female fitting body. When the operating part of the drive mechanism is operated in the other direction, the male fitting body is retracted by the driving mechanism and the female fitting body is pulled by the male fitting body.
The segment comes into close contact with the RC segment on the drive mechanism side together with the female fitting.

[0019]

1 is a partial perspective view of a joint according to an embodiment of the present invention, FIG. 2 is a perspective view of an RC segment, and FIGS.
Is a side view of a joint according to one embodiment of the present invention, and FIG. 5 is a plan view of the joint according to one embodiment of the present invention.

The RC segment 10 is composed of a rectangular plate having a predetermined thickness, and is curved in an arc shape so as to form a part of a cylinder. Inside the RC segment 10,
As shown in FIGS. 1 and 2, the joint 20 according to the present invention is provided in an embedded state.

The joint 20 includes a female fitting body 22, a male fitting body 24 fitted to the female fitting body 22, and a drive mechanism for moving the male fitting body 24 forward and backward toward the female fitting body 22. 26
Consists of

The female fitting 22 is one RC segment 1
It is provided within 0. Female fitting 2 shown in FIGS.
Although 2 is made of clothespins, it may have a shape as shown in FIG. Male fitting 24 and drive mechanism 2
6 is provided in the other adjacent RC segment 10. The female fitting body 22 and the male fitting body 24 are a pair of RCs.
The segments 10 and 10 face each other across the boundary.

A male fitting portion 28 is provided at the tip of the male fitting 24.
Is provided, a rod-shaped body 30 is extended on the rear side of the male fitting portion 28, a screw portion 32 and a worm wheel portion 34 are formed on the rod-shaped body 30, and the screw portion 32 is rotated by the nut-shaped metal fitting 36. Supported by the worm wheel portion 34, the worms 38, 38 of the drive mechanism 26 mesh with each other, and the worm 3
An operation unit 40 is connected to the units 8 and 38.

A pair of worms 38, 38 are meshed with the worm wheel portion 34 so as to sandwich the worm wheel portion 34. The pair of worms 38, 38 are adapted to rotate in opposite directions. The nut-like metal fitting 36 is supported by a case described later.

The male fitting 24 and the drive mechanism 26 are housed in a case 42 that covers them, and the RC segment 1
Protected from 0 forming concrete. The case 42 is an anchor 44 fixed in the RC segment 10.
It is connected to and supported by.

At least a part of the operating portion 40 of the drive mechanism 26 is exposed to the space inside the other RC segment 10. The end of the operation unit 40 is polygonal so that it can be easily rotated by a machine.

Next, the operation of this embedded joint will be described. First, the RC segment 10 is temporarily assembled in the tunnel in a cylindrical shape along the wall surface of the tunnel.

Next, a rotating device (not shown) is fitted from the inside of the tunnel to the end of the operating portion 40, the rotating device is rotated in one direction, and the operating portion 40 is rotated in the direction indicated by arrow A. Then, the worms 38, 38 rotate in the directions indicated by arrows a, b. For this rotation, one or more gears are used between the worms 38, 38 (not shown). When the worms 38, 38 rotate in the directions indicated by arrows a, b,
The worm wheel portion 34 rotates in the direction indicated by the arrow B,
The male fitting 24 advances in the direction indicated by the arrow C while rotating the screw portion 32 in the nut-shaped metal fitting 36. When the male fitting portion 28 of the male fitting 24 comes into contact with the female fitting 22,
The opening 22a of the female fitting 22 is opened, and the female fitting 22 is opened.
The male fitting portion 28 of the male fitting 24 is fitted into the opening 22a of the.

Next, when the rotating device is rotated in the opposite direction and the operating portion 40 is rotated in the direction opposite to the direction indicated by the arrow A, the worms 38, 38 move in the direction opposite to the directions indicated by the arrows a, b. The worm wheel portion 34 rotates in the direction opposite to the direction indicated by the arrow B, and the male fitting 24 rotates in the screw portion 32.
Is retracted while being reversed in the nut-like metal fitting 36, the female fitting 22 is pulled by the male fitting 24, and the female fitting 2
The RC segment 10 on the second side is pulled by the RC segment 10 on the side of the drive mechanism 26, and closely contacts and connects to the RC segment 10 on the side of the drive mechanism 26.

[0030]

According to the present invention, the driving mechanism can be driven from the inner peripheral surface of the segment to fit the male fitting body to the female fitting body, so that the RC segment can be assembled mechanically. Has the effect of becoming.

Further, since the RC segment is not formed with a cross-section defective portion, there is an effect that the strength of the RC segment can be increased.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a joint according to an embodiment of the present invention.

FIG. 2 is a perspective view of an RC segment.

FIG. 3 is a side view of a joint (before fastening) according to an embodiment of the present invention.

FIG. 4 is a side view of a joint (after fastening) according to an embodiment of the present invention.

FIG. 5 is a plan view of a joint (before fastening) according to an embodiment of the present invention.

FIG. 6 is a perspective view of another example of the female fitting body according to the embodiment of the present invention.

FIG. 7 is a partial perspective view showing a part of RC segments connected by using a conventional RC tunnel joint for shield tunnel lining.

8 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 10 RC Segment 20 Joint 22 Female Fitting 24 Male Fitting 26 Drive Mechanism 28 Male Fitting Part 30 Rod-like Body 32 Screw Part 34 Worm Wheel Part 36 Nut-Shaped Metal Fitting 38 Worm 40 Operating Part 42 Case 44 Anchor

Claims (8)

[Claims] 1. A female fitting body, a male fitting body fitted to the female fitting body, and a male fitting body, which are used by being embedded in an RC segment for shield tunnel lining. And a drive mechanism for moving the combined body forward and backward toward the female fitting body, the female fitting body is provided in one RC segment, and the male fitting body and the driving mechanism are adjacent to each other in the RC. Provided in a segment, the female fitting body and the male fitting body face each other across the boundary of the pair of RC segments, and at least a part of the operating portion of the drive mechanism is the other RC segment. The RC pipe embedded joint for shield tunnel lining, which is exposed to the space inside. 2. A male fitting part is provided at the tip of the male fitting part, and a rod-shaped body is extended at the rear side of the male fitting part.
A threaded portion and a worm wheel portion are formed on the rod-shaped body, and the threaded portion is rotatably supported by a nut-shaped metal fitting on the RC segment directly or via another member, and the worm wheel portion includes a drive mechanism of the drive mechanism. The embedded joint according to claim 1, wherein a worm is meshed with the worm, and the operation portion is connected to the worm. 3. The embedded joint according to claim 2, wherein one or more or a pair of worms are meshed with the worm wheel portion so as to sandwich the worm wheel. 4. The embedded joint according to claim 3, wherein the pair of worms are adapted to rotate in opposite directions to each other. 5. The male fitting is housed in a case that covers the male fitting.
~ The embedded joint according to 4. 6. The embedded joint according to claim 5, wherein the nut-shaped metal fitting is supported by the case. 7. The embedded joint according to claim 5, wherein the case is connected to and supported by an anchor fixed in the RC segment. 8. The embedded joint according to claim 1, wherein an end portion of the operation portion has a polygonal shape.