JPH0327131Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an opening reinforcement device for a concrete structure.

Conventionally, in order to provide the required strength to the openings of steel pipe concrete structures, complex reinforcement was required around the openings. In other words, as shown in Fig. 1, bent reinforcing bars 2 and circumferential bars 3 must be placed around the opening 1, which complicates design and construction, reduces workability, and impairs quality control. It was easy to invite thoroughness.

This idea was made in view of the above circumstances, and its purpose was to simplify the reinforcement around the opening.
The purpose of the present invention is to propose an opening reinforcement device that can improve quality by improving bar arrangement, workability, and reducing construction errors, and can reduce construction costs.

This will be explained below with reference to the illustrated embodiments.

In FIGS. 2 and 3, a circumferential reinforcement 3 is arranged around an opening 1 passing through a wall of a reinforced concrete structure. Two of these circumferential bars 3 are placed near the opening ends on both the front and back sides, and four circumferential bars 3 are placed on both the front and back sides of the wall.
The two ends of the reinforcing bars forming the layer are welded together. A lattice-shaped cross bar 4 is welded and arranged inside the circumferential bar 3, and a plurality of square steel pipes 5 are arranged in parallel facing the front and back opening directions in the space partitioned by the cross bar. In addition,
In this embodiment, eight rectangular steel pipes 5 are arranged, and no steel pipes 5 are installed in four fan-shaped spaces among the spaces partitioned by cross bars. Note that the steel pipe arranged in the opening is not limited to a rectangular one, and a circular steel pipe may be arranged in a space partitioned by a cross.

This opening reinforcement device has the above-mentioned configuration, and the opening has circumferential bars with cruciate bars fixed inside, and steel pipes are arranged in parallel in the space partitioned by the cruciate bars, so it is extremely effective. Demonstrates high shear strength. Therefore, there is no need to arrange complicated reinforcement around the opening.
Sufficient strength can be provided simply by fixing the reinforcing ends of the frame to the circumferential reinforcement. When this opening is used as a flow path for gas, fluid, etc., a flow path is formed by using the parallel steel pipes 5 as a flow path and communicating the ducts 6, 6 connected to both ends thereof.

To apply this reinforcing device to construct an opening in a concrete structure, cross reinforcements are made in advance according to the dimensions of the steel pipe to be piped, and welded to the circumferential reinforcements. This circumferential reinforcement is temporarily fixed at the opening position, and in this state is connected to the vertical reinforcement and horizontal reinforcement of the body part by welding or joints. After reinforcing and connecting, steel pipes are inserted and placed, and concrete is poured. In FIG. 3, t is the thickness of poured concrete. In addition,
To connect the reinforcing bars 2 and the circumferential reinforcing bars 3 of the frame body with a joint, for example, as shown in FIG. 4, screw couplers 7 are welded to the circumferential bars in advance in two directions, vertically and horizontally, and the two are screwed together.

This idea is as described above, and the reinforcement around the opening can be simplified, workability and quality can be improved, and construction costs can be reduced.

[Brief explanation of the drawing]

Figure 1 is a diagram of the conventional reinforcement arrangement around the opening, Figure 2
FIG. 3 is a front view and a side view showing the reinforcement arrangement around the opening of the embodiment, and FIG. 4 is a partial front view of circumferential reinforcement connected by a reinforcing bar screw coupler. 1...Opening, 2...Reinforcing bar, 3...Circumferential bar, 4
... Cruciform, 5 ... Square steel pipe, 6 ... Duct, 7
...Nejikatsu puller.

Claims (1)

[Scope of utility model registration request] Circumferential reinforcement surrounds the opening of the concrete structure, and this circumferential reinforcement is connected to the reinforcing steel of the structure, and lattice-shaped cross reinforcement is fixedly arranged inside the circumferential reinforcement. An opening reinforcement device for a concrete structure, characterized in that a plurality of steel pipes are arranged in parallel along the opening direction in a space partitioned by cross bars.