JPH06346694A - Structure of joint for concrete segment - Google Patents

Abstract

PURPOSE:To make works easy for connecting concrete segments together even in the case of automatic erection, and to shorten the time required for execution of work. CONSTITUTION:While connection in the tunnel-wise direction is made by generally-practiced chuck-in method, connection in the ring-wise direction is made by connection of projectile push-out pins 5 provided to the inside of a concrete segment 2 on one side and chucks 4 provided to the concrete segment 2 on the other side for thrusting-in by oil pressure of the push-out pins 5 therein. In the tunnel-wise direction, fixing pins 3 are inserted into the chucks 4 and are thrust therein by jacking thrust for erection, and in the ring-wise direction, the push-out pins 5 are thrust by means of oil pressure or the like into the chucks 4 buried in an adjoining segment for connection. Thereby, erection can be executed easily and certainly even in the case of automatic erection without hindrance by connecting pins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for concrete segments used in a shield tunnel for joining each concrete segment by automatic assembly.

[0002]

Prior Art and Problems to be Solved by the Invention
Conventionally, as a joint structure of this type of concrete segment, a structure in which the segment rings in each concrete segment are fastened by a chuck pin projecting and fixed to a connecting end face has been already put into practical use.

However, when this chuck pin is used for a segment joint or a so-called piece-to-piece joint, it cannot be installed because it interferes with the assembly of each segment in the ring direction and the tunnel direction in automatic assembly. .

That is, as shown in FIG. 2, the chucking pins R and P, which are chuck pins for fastening, are 90 degrees apart from each other in the ring direction and the tunnel direction on the connecting end face of each segment.
It sticks out at an angle of °. Therefore, either of the pins interferes with the assembly in the ring direction or the tunnel direction.

Therefore, conventionally, the fastening of each segment in the tunnel direction, that is, the fastening of the segment ring and the segment ring is performed by the chuck pin, and the fastening of each segment in the ring direction is performed by bending bolts. I was going.

The present invention was devised in view of the above-mentioned circumstances, and the purpose thereof is to easily perform the work of connecting both concrete segments to be connected to each other even in the automatic assembly, thereby shortening the connecting work time. An object of the present invention is to provide a joint structure for a concrete segment that can be used.

[0007]

According to the present invention, each concrete segment is joined in the tunnel direction by a general chuck pin method, and each concrete segment is joined in the ring direction in one concrete segment. And a chuck portion provided on the other concrete segment of the concrete segment so that the push-out pin can be protruded and press-fitted by hydraulic pressure or the like.

According to this structure, the fixed pin is inserted into the chuck portion in the tunnel direction in the tunnel direction and pushed by the jack thrust, and the push-out pin is embedded in the adjacent segment in the ring direction. By press-fitting into the chuck portion with a device such as hydraulic pressure, it is possible to perform the joining so that the joining pins do not get in the way and the assembling work can be performed easily and surely even in the automatic assembling.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete segment joint structure of the present invention will be described below with reference to the illustrated embodiments.

Both concrete segments 2 are buried in the connecting end face portions of both concrete segments 2 to be connected.
Coupling structure 1 configured to connect to each other (see FIG. 1)
Is a fixing pin 3 provided on one of the concrete segments 2 to be connected,
Each of the concrete segments 2 is joined by the chuck portion 4 provided on the other concrete segment 2 of the two concrete segments 2 to be connected so that the fixing pin 3 can be inserted by pushing with a jack thrust.
In the ring direction.

In addition, in both concrete segments 2 to be connected, a projecting push-out pin 5 provided in one concrete segment 2 and a push-out pin 5 are connected so that the push-out pin 5 can be projected by a hydraulic pressure or the like and press-fitted. By the chuck portion 4 provided on the other concrete segment 2 in both concrete segments 2 to be
It is configured to join in the tunnel direction in each concrete segment 2.

The fixing pin 3 and the chuck portion 4 in this embodiment are provided with one anchor bar 6 which is located inside the concrete segment 2 behind them. Also,
The push-out pin 5 is slidably provided in the storage box 7 so that it can be projected by a device such as hydraulic pressure. Note that the storage box 7 here is provided with two anchor bars 6.

When the concrete segment joint structure 1 having the above-mentioned structure is adopted and the respective concrete segments 2 are joined in the shield construction method, for example, the following is performed.

First, the joining of each concrete segment 2 in the tunnel direction is performed by inserting the fixing pin 3 into the chuck portion 4 when assembling the segment and pushing it in with the jack thrust.

Next, when joining each concrete segment 2 in the ring direction, a push-out pin 5 is press-fitted into a chuck portion 4 embedded in an adjacent segment by a hydraulic device or the like (not shown).

As a result, even if the concrete segments 2 are joined in the ring direction and the tunnel direction by automatic assembly, the joining pins do not get in the way and can be joined easily and reliably.

Although the present invention has been described with reference to the existing chuck pin type joint in the above-mentioned embodiment, the present invention
A structure using a steel plate instead of the chuck pin can be similarly implemented.

[0018]

According to the present invention, since each pin of the pin joint for performing automatic assembly is composed of the fixed pin and the push-out type pin, both the ring joint and the segment joint can be assembled only by pushing the chuck. it can.

Therefore, the joint structure of the concrete segment of the present invention is suitable for automatic assembly, and the device of the shield machine can be made economical as compared with the bolt fastening system.

[Brief description of drawings]

FIG. 1 is a schematic view showing a joint structure of a concrete segment of the present invention.

FIG. 2 is a schematic view showing a conventional joint structure of a concrete segment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Joint structure, 2 ... Concrete segment, 3 ... Fixed pin, 4 ... Chuck part, 5 ... Extruding pin, 6 ... Anchor bar.

Claims (1)

[Claims] 1. A joint structure, which is embedded in the connection end surface portions of both concrete segments to be connected and is configured to connect the both concrete segments, wherein one concrete segment of the both concrete segments to be connected is Joining in the ring direction of each concrete segment by a fixed pin provided and a chuck part provided on the other concrete segment of both concrete segments to be connected so that the fixed pin can be inserted by pushing with a jack thrust. And a projecting push-out pin provided in one concrete segment in both concrete segments to be connected, and this push-out pin can be pushed in by projecting by hydraulic pressure or the like. Joint structure of concrete segments, characterized in that the chuck portion provided in the other of the concrete segment in both the concrete segment to be the coupling is configured to perform bonding to the tunnel direction in the respective concrete segments.