JPS6033196Y2 - Tunnel lining segment joint device - Google Patents

Description

[Detailed explanation of the invention] This invention is a tunnel lining segment buried underground (
This invention relates to a joint device for connecting segments (hereinafter referred to as "segments"), and its purpose is to provide a device that can be installed easily and quickly, mainly when connecting small-diameter segments.

Conventionally, when connecting segments, a method is generally known in which joint fittings are directly fastened together with bolts at the connecting portion.

However, this method requires time and effort to tighten the bolts,
Alternatively, when tightening the bolts, excessive force is applied to the joint fittings, which may cause the joint fittings to twist or peel off.

In addition, a device in which male and female fittings are fitted and wedged has been proposed, but there is room for improvement in terms of fixing to the segment and manufacturing.

This idea was devised to deal with the above problems.

Hereinafter, explanation will be given based on the illustrated embodiment.
The female joint metal fitting 2 is shaped by bending it into a letter shape, and an elongated insertion hole 4 is bored horizontally in the base piece 3 at the central portion thereof.

The female joint fitting 2 is buried in concrete so that one end surface of the segment 1 in the circumferential direction is flush with the base piece 3.

Furthermore, the ends of the leg pieces 5, 5 on both sides of the female joint fitting 2 are bent so as to narrow the gap between them, and an anchor reinforcing bar or the like is sandwiched and welded between the ends of the bent leg pieces. Fittings 2
be buried in concrete.

Then, an internal space 7 that opens to the surface of the segment 1 is formed within the wall surfaces of the base piece 3 and both leg pieces 5, 5 of the female joint fitting 2.

On the other hand, the male joint fitting 8 is formed by bending the reinforcing bar into a U-shape,
The leg portions 10 of the male joint fitting 8 are arranged such that the base portion 9 of the central portion protrudes from the other end surface of the segment 1 in the circumferential direction and has a U-shape when viewed from the front and back directions of the segment.
, 10 are buried in concrete, that is, the anchor reinforcing bars 11 are sandwiched and welded between both legs, and the male joint fitting 9 is buried in concrete.

When the base 9 of the male joint fitting 8 of one of the adjacent segments 1 and 1 is inserted into the insertion hole 4 of the base piece 3 of the other female joint fitting 2, the base 9 of the male joint fitting protrudes into the internal space 7. Therefore, a wedge 12 is driven between the base piece 3 and the base 9 from the internal space opening to connect the segments 1, 1.

The present invention has the above-mentioned structure, and the base piece of one segment female joint fitting is flush with the connecting end surface, and the insertion hole is bored there, and the base piece of the female joint fitting of the other segment protrudes from the connecting end surface of the other segment. The base of the male fitting is made of reinforcing steel bent into a U-shape and has a rounded surface when viewed from the insertion side, so insertion into the insertion hole of the female fitting can be done smoothly and quickly, and the base piece and The segments can be reliably connected simply by driving a wedge between them and the base, and the male and female fittings have a simple structure, are easy to weld to reinforcing bars, and are easy to place within the formwork. The proposed joint device has great practical value not only in the manufacture of segments but also in construction.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, with FIG. 1 being a cross-sectional view and FIG. 2 being a longitudinal sectional view. 1... Segment, 2... Female joint fitting, 3... Base piece, 4... Insertion hole, 5...
... Leg, 6 ... Reinforcing bar, 7 ... Internal space, End ... Male joint fitting, 9 ... Base, 10 ... ... Legs, 11 ... Reinforcing bars, 12
······wedge.

Claims (1)

[Scope of utility model registration request] An insertion hole is drilled in the base piece at the center of the female joint fitting, which is made by bending a plate into a U-shape, and the ends are bent so as to narrow the leg pieces on both sides. A reinforcing bar is sandwiched and welded between the ends of one leg, and a female joint fitting is buried in concrete so that the base piece and the end face of the segment are flush with one end face of the segment. An internal space opening to the surface of the segment is formed between the leg piece and the base of the central part of the male joint fitting made by bending the reinforcing bar into a U shape so that it protrudes from the other end surface of the segment. The legs on both sides of the male joint fitting are buried in concrete, and a reinforcing bar is sandwiched and welded between the tips of both legs, and this base piece is inserted into the base piece of the female joint fitting of one segment of the adjacent segment. A joint device for tunnel lining segments, characterized in that a wedge is driven between the base of the male joint fitting of the other segment that is inserted into the hole and protrudes into the internal space and is connected thereto.