JPS5817870B2 - Reinforced concrete construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforced concrete construction method.

In conventional reinforced concrete IJ-t-i, when an earthquake occurs, the pillars on the lowest floor cannot withstand the heavy pressure of the upper floors and swell in all directions, resulting in cracks and the collapse of the concrete. ing.

The purpose of this invention is to eliminate the above-mentioned drawbacks.The purpose of this invention is to completely prevent the expansion of reinforcing bars due to heavy pressure, thereby constructing strong and robust reinforced concrete, while also making construction extremely easy. This is due to improved efficiency.

In order to achieve the above object, the present invention bends an elongated strip-shaped iron plate into an annular shape, and provides a protruding edge protruding from one edge of a through hole bored at the overlapping portion of both ends thereof to penetrate into the other side. A reinforcing ring consisting of a reinforcing ring, a hook bolt that is inserted through the transparency, and a metal elastic plate having chevron-shaped bent portions at both ends, and reinforcing bars to be installed inside a structure such as a column are arranged in a circle at predetermined intervals. At the same time, the reinforcing ring is wrapped around one or every few stirrups fixed on the outer periphery, and the metal elastic plate is joined to the inside of the overlapping portion of both ends, and a hook bolt is inserted through the reinforcing ring, and the hook of the hook bolt is inserted. The reinforcing ring is fixed to the reinforcing bars by locking the parts to the reinforcing bars and tightening them with nuts, and then concrete is poured.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, numeral 1 is a reinforcing ring, 2 is a hook bolt, and 3 is a reinforcing ring.
indicates a metal elastic plate, and the reinforcing ring 1 is formed by bending a long and thin strip-shaped iron plate to form a ring having a predetermined diameter.
A projecting edge 5 is provided on one periphery of the hole to fit into the through hole of the other side.

The hook bolt 2 has a semi-annular hook portion 6 at its tip and a protruding flange 8 between the hook portion 6 and the male threaded portion γ.
This is provided.

The metal elastic plate 3 is provided with chevron-shaped bent portions 9, 9 at both ends thereof, with respective tips 9', 9' protruding to the opposite side, and a transparent hole 10 is bored in the center.

When constructing reinforced concrete for columns, etc., the reinforcing bars (a) placed inside the structure are arranged in a circle with a predetermined interval between them, and stirrups are fixed to the outer circumference at appropriate intervals. , the reinforcing ring 1 is wrapped around every one or every few of the stirrups, and the metal elastic plate 3 is joined to the inside of the overlapping portion of both ends.

The reinforcing ring 1 is fixed to the reinforcing bar a by inserting the hook bolt 2 into the opening 10 and the through holes 4, 4 of the reinforcing ring 1, locking the hook portion 6 to the reinforcing bar a, and tightening with nuts 11. After that, concrete was poured.

Note that the reference numeral 12 in the figure indicates a washer.

As described above, the present invention arranges reinforcing bars in a structure in a circular manner with predetermined intervals between each reinforcing bar.

Since a reinforcing ring is fixed to each stirrup or every few stirrups fixed on the outer periphery, the strength against heavy pressure and bending moment is significantly increased. There is no fear that the reinforcing bars will bulge outward.

In particular, this invention [in this case, a metal elastic plate is bonded to the inside of the overlapping portions at both ends of the reinforcing ring and tightened with hook bolts, so the overlapping portions can be firmly attached, and the overlapping portions Since the protruding edge protruding from one side fits into the transparent part of the other side, the tensile strength is also significantly increased.

In addition, since it is firmly fixed to the reinforcing steel by the angle-shaped bent part of the metal elastic plate and the hook part of the hook bolt, when pouring concrete, the work can be carried out smoothly without fear of the reinforcing ring shifting. The operation of fixing the reinforcing ring is also extremely simple, so that work efficiency can be improved.

Moreover, by increasing or decreasing the number of reinforcing rings through strength calculations, it is possible to construct reinforced concrete with a desired strength.

Additional relationship This invention is patented in Patent No. 1111698 (%Koshō 57-
Publication No. 912) Improvement of reinforced concrete construction method (This is an additional invention related to the nuclear power plant side (in this case, it is equipped with an annular reinforcing ring formed of an elongated iron plate and hook bolts that fasten both ends of the ring, The reinforcing bars installed in a structure such as the above are arranged in a circle at predetermined intervals, and the reinforcing ring is wrapped around each stirrup or every few stirrups fixed to the outer periphery of the reinforcing bars, and the reinforcing rings are perforated at the overlapped portions of both ends. The reinforcing ring is fixed to the reinforcing bars by inserting the hook bolt into the provided through hole, and locking the hook part of the hook bolt to the reinforcing bar and tightening it with a nut, and then pouring concrete. However, a protruding edge that fits into the other through hole is provided on one periphery of the through hole bored in the overlapping part of both ends of the reinforcing ring to increase the tensile strength at the overlapping part. The reinforcing ring can be firmly fixed to the reinforcing bars by folding a metal elastic plate with a chevron-shaped bent part inside the overlapping part and tightening it with hook bolts, further increasing the strength at the nuclear power plant. It is something.

[Brief explanation of drawings]

The drawings show an embodiment of the reinforced concrete construction method according to the present invention. Figure 1 is a front view of a part of the reinforced concrete with the reinforcing ring fixed, and Figure 2 is a partial front view of the reinforcing ring. FIG. 3 is a plan view of the hook bolt and the elastic metal plate. 1 - Reinforcement ring, 2 - Hook bolt, 3 - Elastic metal plate,
4-through hole, 5-protruding edge, 6-hook portion, 9-angular bent portion, a-reinforcing bar, b-stirrup.

Claims (1)

[Claims] 1. A long and thin strip-shaped iron plate is bent into an annular shape, and one periphery of a through hole is bored at the overlapped portion of both ends. A ring, a hook bolt inserted into the through hole, and a metal elastic plate having chevron-shaped bent portions at both ends, and reinforcing bars to be installed in a structure such as a column are arranged in a circle at predetermined intervals, and the outer periphery of the metal elastic plate is provided. The reinforcing ring is wrapped around one or every few stirrups fixed to the steel, the metal elastic plate is joined to the inner side of the overlapping portion at both ends, the hook bolt is inserted, and the hook portion of the hook bolt is attached to the reinforcing steel. A method of constructing reinforced concrete, characterized in that a reinforcing ring is fixed to a reinforcing bar by locking the reinforcing ring and tightening it with a nut, and then concrete is poured.