JPH0526158Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention joins a pair of concrete members using an insert fitting embedded in one concrete member and a joining bolt secured to the other concrete member. In particular, it relates to the joint structure of the segments of the shield method.

[Prior art]

Conventionally, this type of insert metal fitting is generally known to consist of a main body part having a screw hole for screwing a joining bolt opened in the joint end face, and an anchor part formed at the inner end of the concrete member of this main body part. It is being

[Problems that this invention must solve] However, with this conventional insert fitting, the anchoring force within the concrete member is generated almost entirely in the anchor part, so the anchoring force is weak and insufficient to firmly join a pair of concrete members.

This idea was devised in view of the above-mentioned circumstances, and its purpose is to provide a structure that has a large anchoring force and can firmly join a pair of concrete members.

[Means for solving problems]

The concrete member joining structure of this invention is embedded in one concrete member, and the joining bolt 7 that passes through the through hole of the tightening plate 11 from the joining work recess 10 in the other concrete member is screwed together. A bifurcated anchor part 4 is formed on the insert metal fitting 1, and a spiral reinforcement 5 with a larger diameter than this metal fitting is attached to the outer circumference of the insert metal fitting 1 by means of fixing reinforcing bars 13 attached to the insert metal fitting 1 at the front and rear of the metal fitting body. It is characterized by being installed.

The joining strength of the concrete members is increased by the joining bolt passing through the insert fitting and the tightening plate.

〔Example〕

An embodiment of this invention will be described below with reference to FIG. 1, which is a diagram showing a state in which a pair of concrete members are joined.

The insert fitting 1 includes a main body part 3 having a screw hole 3a opened in a joining end surface 2a of one concrete member 2, and a bifurcated anchor part 4 formed at the inner end of the concrete member 2 of this main body part 3. and a spiral striation 5 provided on the outer periphery of the main body portion 3 and the anchor portion 4.

Note that here, the code 6 is the other concrete member,
7 is a bolt for joining, 8 is a pipe 10 for forming a through hole 9 is a recess for joining work, 11 is a tightening plate, 1
2 is an anchor, and 13 is a fixing reinforcing bar attached to the main body 3 and the anchor part 4 in order to fix the spiral bar 5 to the metal insert 1.

When joining a pair of concrete members 2 and 6 using the insert fitting 1 having such a configuration, the joining bolt 7 is inserted into the tightening plate by using the joining recess 10 of the other concrete member 6. This is done by inserting the metal insert into the through hole 9 of the concrete member, passing through the through hole, and screwing it into the screw hole 3a of the metal insert 1.

At this time, the anchoring force of the insert fitting 1 to the concrete member 2 is increased by the action of the spiral reinforcement 5, so that the tightening force by the joining bolt 7 can be increased, and the pair of concrete members 2 , 6 can be firmly joined.

FIG. 2 shows the insert fitting 1 with a segment 14, which is a concrete member, and a key segment 15.
This figure shows the state in which it is used for joining with.

Note that the spiral thread 5 has a diameter that is approximately the same as or slightly larger than the size of the anchor portion 4 of the metal insert 1, as shown in FIGS. 1 and 7.
In addition to being fixed by the fixing reinforcing bars 13 provided at the bifurcated base of the anchor part 4 and the end on the screw hole 3a side of the main body part 3, one end is fixed from the anchor part 4 as shown in FIG. It may also be fixed with a small diameter anchor part 4 and fixing reinforcing bars 13.

[Effect of idea]

One side of the joint is an insert fitting with spiral reinforcement attached to the outer periphery, and the other side is a through hole for the joining bolt and a recess for the joining work, resulting in an extremely simple structure, which makes it possible to reduce the manufacturing cost of the segment. The anchoring force within the concrete member is increased by providing spiral reinforcement using reinforcing bars attached to the outer periphery of the insert metal fitting, which has a threaded hole that forms a bifurcated anchor part into which the connecting bolt is screwed. be able to.

Therefore, it becomes possible to further strengthen the tightening connection by the connecting bolt between the concrete member having a through hole in the tightening plate through which the connecting bolt passes and the concrete member in which the insert fitting is embedded.

[Brief explanation of drawings]

Figure 1 is a sectional view showing how a pair of concrete members are joined by using the insert metal fitting of this invention, and Figure 2 shows the state where the insert metal fitting of this invention is used to connect a segment and a key segment, which are concrete members. The sectional view shown in FIG. 3 is a front view showing another embodiment of the metal insert. 1... Insert metal fitting, 2... Concrete member, 2a... Joint end surface, 3... Main body, 3a...
Screw hole, 4...Anchor part, 5...Spiral reinforcement, 6...Concrete member, 7...Joining bolt, 8...Pipe, 9...Through hole, 10...Concavity for joining work, 11... Tightening plate, 12...
...anchor, 13...fixing reinforcing bar, 14...segment, 15...key segment.

Claims (1)

[Scope of utility model registration request] A recess 1 buried in one concrete member and used for joining work in the other concrete member.
A bifurcated anchor portion 4 is formed in the insert fitting 1 into which the joining bolt 7 passed through the through hole of the tightening plate 11 from 0 is screwed, and a bifurcated anchor portion 4 is formed on the outer periphery of the insert fitting 1. A concrete member joining structure characterized in that the spiral reinforcing bars 5 are attached by fixing reinforcing bars 13 attached to the insert fitting 1 at the front and rear of the fitting body.