JP2652118B2 - Partial concrete placement method for closed section material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of placing concrete in a closed section such as a steel pipe in the fields of construction, civil engineering, and bridges.

[0002]

2. Description of the Related Art In a structure using a closed section material such as a steel pipe column in a building or civil engineering, such as a steel pipe column, as shown in FIG. 8, a joint portion between a steel pipe column 1 and a beam 2 or as shown in FIG. When the horizontal steel pipe member 3 is supported by the pin support 4 or the like, depending on the applied stress, the steel pipe column 1 or the steel pipe member 3 may be used.
In order to prevent local buckling and deformation, concrete 5 or mortar may be partially introduced to increase the strength of this portion.

[0003] The most common method of this charging is to provide a charging port 7 on the side wall surface of a closed section member 6 which is a steel pipe as shown in FIG. Close with bottom plate 8.

When the concrete 5 is poured from the charging port 7 in this way, the concrete 5 is filled on the bottom plate 8.

[0005]

The bottom plate 8 is made of steel. When the bottom plate 8 is manufactured at a factory, the column must be cut at the bottom plate position. It takes time and effort to cut steel pipes accurately according to the cross-sectional shape, and it is very difficult to install the closed cross-section material 6 because it has openings only at the upper and lower ends. Have difficulty.

SUMMARY OF THE INVENTION An object of the present invention is to solve the inconveniences of the prior art and to provide a method of placing concrete in a closed section material in which concrete can be placed freely and easily at an arbitrary position.

[0007]

According to the present invention, in order to achieve the above object, an inlet is provided in a closed section material such as a steel pipe, and concrete is partially poured into the closed section material through the inlet. In the case, a flexible container having a flanged inlet portion engaging with the inlet is reduced in size by folding the whole except for the inlet portion, and inserted into the closed cross-section material from the inlet, And, it is spread in the closed section material, concrete is poured into the container from the inlet of the flexible container into the container, and the container filled with concrete is brought into close contact with the inner surface of the closed section material, and The container shall be provided with a projection to support the bottom surface.Furthermore, the injection port with flange of the container which is out of the input port of the closed section material shall be cut and removed after placing concrete, and the input port shall be closed. The gist is also It is.

[0008]

According to the first and third aspects of the present invention, concrete is partially cast into the inside of a closed section material via a flexible container, and the flexible container has a closed section. By simply providing an inlet in the material, it can be easily installed inside the closed section material through this inlet.

According to the second aspect of the present invention, in addition to the above-mentioned functions, even a container filled with concrete and subjected to a load is stably accommodated in the closed section material by supporting the bottom surface with the projection. .

[0010]

1 to 3 are perspective views of each step showing one embodiment of the method for partially concrete-casting a closed section material according to the present invention. In the drawings, reference numeral 6 denotes a closed section material such as a steel pipe. The provision of the inlet 7 on the wall is the same as the conventional example shown in FIG.

On the other hand, as shown in FIG.
A flexible container 11 made of a flexible material such as vinyl is prepared. The flexible container 11 was provided with an injection port 10 made of a hard member and having a flange 9 to be engaged with the input port 7.

The cross-sectional shape of the flexible container 11 may be adapted to the cross-sectional shape of the closed cross-section member 6, but may be larger. Further, the upper surface may be a closed container having a closed upper surface, but the upper surface may be a cage-like container having an opening.

As shown in FIG. 7, a screw hole is provided below the inlet 7 of the closed section material 6, and a screw 12 is inserted through the screw hole.
Is inserted into the closed section 6, and the head of the screw 12 is adhesively fixed to the closed section 6. In this way, the screw
Reference numeral 12 denotes a projection protruding from the inner wall of the closed section member 6. In addition,
It is also possible to pass a reinforcing bar between the facing sections of the closed section member 6 and to cross the reinforcing bars in a cage shape in place of the screw 12.

As shown in FIG. 6, the flexible container 11 is reduced in size by folding the whole except for the inlet 10 with the flange 9. Then, as shown in FIG. 1, it is inserted into the inside of the closed section material 6 from the input port 7.

Then, as shown in FIG.
Is spread out in the closed section 6, with the flange 9 of the inlet 10, which extends out of the closed section 6, overlapping the periphery of the inlet 7.

Now that the setting is completed, the flexible container
When the concrete 5 is poured into the container 11 from the inlet 10 of the container 11, the outer periphery of the flexible container 11 filled with the concrete 5 is in close contact with the inner surface of the closed section material 6. Further, the flexible container 11 filled with the concrete 5 and subjected to a load is stably accommodated in the closed section member 6 because the bottom surface thereof is supported by the screws 12.

After hardening of the concrete 5, an injection port 10 with a flange 9 protruding from the input port 7 of the closed section material 6.
Is cut and removed, the inlet 7 is closed for repair, the screw 12 is pulled out, and the screw hole is closed.

[0018]

As described above, the method for partially casting concrete of a closed section material according to the present invention allows concrete to be freely and easily poured into an arbitrary position without providing a bottom plate. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first step showing one embodiment of a method of partially concrete-casting a closed section material according to the present invention.

FIG. 2 is a perspective view of a second step showing one embodiment of the method of placing concrete in a closed section material according to the present invention.

FIG. 3 is a perspective view of a third step showing one embodiment of the method of placing concrete in a closed section material according to the present invention.

FIG. 4 is a perspective view of a flexible container.

FIG. 5 is a cross-sectional view of an inlet of a flexible container.

FIG. 6 is a perspective view of a folded flexible container.

FIG. 7 is a longitudinal sectional side view showing an example of a projection provided on an inner wall of a closed section material.

FIG. 8 is an explanatory view of a column / beam joint.

FIG. 9 is an explanatory diagram of a pin support.

FIG. 10 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel pipe column 2 ... Beam 3 ... Steel pipe member 4 ... Pin support part 5 ... Concrete 6 ... Closed section material 7 ... Input port 8 ... Bottom plate 9 ... Flange 10 ... Injection port part 11 ... Flexible container 12 ... Screw

Claims (3)

(57) [Claims] 1. An injection port provided with a flange to be engaged with the input port when an input port is provided in a closed section material such as a steel pipe and concrete is partially poured into the closed cross section material through the input port. A flexible container having a portion, which is reduced in size by folding the whole except for the injection port portion, inserted into the closed cross-section material from the input port, and expanded in the closed cross-section material,
A method of placing concrete in a closed section material, wherein concrete is poured into the container from an inlet of the flexible container and the container filled with concrete is brought into close contact with the inner surface of the closed section material. 2. The method according to claim 1, wherein a projection for supporting the bottom surface of the container is provided on the inner wall of the closed section material. 3. The container according to claim 1, wherein the injection port portion with a flange of the container, which is protruded from the input port of the closed section material, is cut and removed after placing concrete, and the input port is closed. Partial concrete placement method for closed section material.