JPH09317201A - Reinforcement method of bearing load of concrete wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the strength of a wall and to improve the bearing load by driving a plurality of anchor bolts in a wall surface, screwing nuts, and tightening them with the prescribed torque as a reinforcement method of a concrete wall of a building. SOLUTION: In a building made of reinforced concrete or steel framed concrete, the axis is agreed with both faces 12, 13 of a concrete wall 11, and a plurality of anchor bolts 14 are driven. A locking part 21 is provided on a tip of a base part 20 of the anchor bolts 14, and nuts 15 are tightened into a screw with the prescribed torque through a washer 16. The tension generated in the anchor bolts 14 compresses a reinforcement range 17 in the periphery of the base part 20 in a conical shape, the strength of the concrete wall 11 is increased and the bearing load is improved. The axis of the anchor bolts on each surface may be shifted or the anchor bolts may be driven on either surface. The reinforcement method of the bearing load is very simple in constitution, and the cost can be greatly reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a reinforced concrete structure (RC structure) or a steel frame reinforced concrete structure (SRC structure).
The present invention relates to a concrete wall proof stress reinforcement method that is suitable for application to the like.

[0002]

2. Description of the Related Art Conventionally, for example, reinforced concrete construction (RC
Structure) or a steel reinforced concrete structure (SRC structure) or the like, when reinforcing a concrete wall, iron plates 101, 101 are applied to both sides of the concrete wall 100 as shown in FIG. 102
It was common to fasten it to the wall 100 by fastening it with the nut 103. Note that reference numeral 104 is a washer.

[0003]

However, in the conventional method for reinforcing a concrete wall as described above, since two iron plates 101 having a size substantially covering the entire surface of the wall 100 are required,
There was a problem that the cost was increased.

An object of the present invention is to solve the above problems and to provide a method for reinforcing the proof stress of a concrete wall, which can significantly reduce the cost.

[0005]

The present invention is a method for reinforcing the yield strength of a concrete wall, which is configured as follows in order to solve the above-mentioned technical problems. That is, the concrete wall proof stress reinforcement method of the present invention is characterized in that a plurality of anchor bolts are driven into a wall surface of a concrete wall of a building, and a nut is fastened to the anchor bolts to generate a predetermined tension in the anchor bolts. And

The concrete wall proof stress reinforcement method of the present invention comprises the above-mentioned essential components, but is also applicable when the following components are added in addition to these components. The constituent elements are that the anchor bolt is driven into both sides of the wall, the anchor bolt has the center axis aligned with the anchor bolt on the opposite surface, or the building is reinforced concrete construction or steel reinforced concrete construction. Is.

In the concrete wall proof stress reinforcement method of the present invention, since the surrounding concrete is compressed by the tension generated in the anchor bolt, the strength of the wall is increased and the proof stress is improved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a concrete wall proof stress reinforcing method according to the present invention will be described in detail with reference to illustrated embodiments.

FIG. 1 shows a state in which a proof stress reinforcing method for concrete walls according to the present invention (hereinafter referred to as proof stress reinforcing method) is applied. This proof stress reinforcement method is applied when reinforcing the concrete wall 11 of a reinforced concrete structure (RC structure) or a steel frame reinforced concrete structure (SRC structure), for example. A plurality of anchor bolts 14 are driven into.

As the anchor bolt 14, a commercially available one can be used. In this example, the base portion 20 and
The one having a locking portion 21 provided at one end of the base portion 20 and a screw 22 provided at the other end of the base portion 20 is used.

The anchor bolt 14 has an appropriate length according to the thickness of the concrete wall 11.
The position where the anchor bolt 14 is driven is set, for example, so that the central axis lines of the anchor bolt 14 of one wall surface 12 of the concrete wall 11 and the anchor bolt 14 of the opposite wall surface 13 coincide with each other as shown in the figure.

After the anchor bolt 14 is driven in, the anchor bolt 14 protruding from the concrete wall 11
The nut 15 is fastened to the screw 22 at the tip of the through a washer 16 with a predetermined torque. Then, anchor bolt 1
In a state where the locking portion 21 of No. 4 is locked inside the concrete wall 11, the base portion 20 is pulled toward the nut 15 side, and a predetermined tension is generated in the base portion 20.

This tension compresses the frustoconical reinforcing area 17 around the base 20 as shown by the hatched portion in FIG. 2, so that the strength of the concrete wall 11 increases and the yield strength improves. Here, by appropriately setting the interval at which the anchor bolts 14 are driven, the reinforcing range 17 can be expanded to the entire concrete wall 11, and thus the yield strength of the entire concrete wall 11 can be improved.

In this proof stress reinforcing method, as described above, the anchor bolts 14 are driven into the wall surfaces 12 and 13 of the concrete wall 11, and the nuts 15 are attached to the anchor bolts 14.
Since it is only fastened with a predetermined torque, the configuration is very simple and the cost can be greatly reduced.

In the above-described embodiment, the anchor bolts 14 and 14 are driven into the wall surfaces 12 and 13 on both sides of the concrete wall 11 so that the central axes coincide with each other, but as shown in FIG. Anchor bolt 14, 1
It is also possible to drive the 4 with being offset from each other. In addition, one surface of the concrete wall 11, that is, the wall surface 12 or the wall surface 13
The anchor bolt 14 may be driven in only at the position.

[0016]

As described above, according to the method for reinforcing the strength of a concrete wall according to the present invention, a plurality of anchor bolts are driven into a concrete wall surface of a building, and the nuts are fastened to the anchor bolts. Since it is possible to improve the yield strength of the concrete wall only by generating the tension of, the configuration can be made very simple, which enables a significant cost reduction.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a concrete wall proof stress reinforcing method according to the present invention is applied.

FIG. 2 is a diagram showing a compression range by anchor bolts.

FIG. 3 is a view showing another embodiment of the method for reinforcing the yield strength of a concrete wall according to the present invention.

FIG. 4 is a diagram showing a method of reinforcing yield strength of a concrete wall according to a conventional example.

[Explanation of symbols]

 11 Concrete wall 12, 13 Wall surface 14 Anchor bolt 15 Nut 16 Washer 17 Reinforcing range 20 Base 21 Locking portion 22 Screw

Front page continuation (72) Inventor Katsura Kobayashi 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Co., Ltd. (72) Yuzo Ichijo 2--10-2 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industrial Co., Ltd. (72) Inventor Shinji Kato 2-10-10 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Co., Ltd. (72) Inventor Yuji Hirota 2-26-10 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd.

Claims (4)

[Claims] 1. A method for reinforcing the strength of a concrete wall, wherein a plurality of anchor bolts are driven into a wall surface of a concrete wall of a building, and a nut is fastened to the anchor bolt to generate a predetermined tension in the anchor bolt. . 2. The method for reinforcing the yield strength of a concrete wall according to claim 1, wherein the anchor bolts are driven into both sides of the wall. 3. The method for reinforcing the yield strength of a concrete wall according to claim 2, wherein the central axis of the anchor bolt coincides with the anchor bolt on the opposite surface. 4. The method for reinforcing the proof stress of a concrete wall according to claim 1, wherein the building is a reinforced concrete structure or a steel frame reinforced concrete structure.