JPH06316943A - Method of forming air space in building structure - Google Patents

Abstract

PURPOSE:To form air spaces for reducing the volume of concrete in a building structure by a simple method of execution, and to easily coordinate the shapes of the air spaces with the shapes structurally required in the building structure. CONSTITUTION:While a form for casting concrete 11 for a building structure therein is installed, an air bag 7 for forming an air space 4 inside the building structure is arranged. Then, the air bag 7 is inflated with air blown therein, and the concrete 11 is cast afterward into the form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air layer forming method for reducing the volume of concrete in a building structure.

[0002]

2. Description of the Related Art Heavy concrete building structures, such as the walls of garbage pits in incinerator plants,
A wall with a useless wall thickness is created due to the function of the pit.
Therefore, in the past, in order to reduce the volume of concrete on the wall, a wooden killing form was used, or wasteful concrete was poured.

[0003]

However, among the conventional construction methods, in the case of the wooden killing formwork, there is a problem that it takes time and labor to construct the killing formwork, and both construction methods increase the construction cost. There was also the problem of doing.

The present invention has been made in order to solve such conventional problems, and an object thereof is to provide an air layer forming method for a building structure which is simple in construction and inexpensive in cost.

[0005]

An air layer forming method for a building structure according to the present invention is an air bag for forming an air layer in a building structure while installing a formwork for pouring concrete for the building structure. Is placed, and air is sent into this air bag to expand it and pour concrete.

[0006]

[Function] With the above structure, compressed air is press-fitted into the air bag to inflate it to a predetermined size, and then concrete is poured into the formwork and solidified to form a wall with an air layer.
The volume of concrete can be reduced by this air layer. The size of the air layer can be adjusted depending on the size of the air bag inflated, and the shape of the air bag can be adjusted to the shape required for the structure of the building structure by the shape of the air bag.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of an example of a building structure constructed based on the air layer forming method of the present invention. In FIG. 1, 1 is a ceiling slab and 2 is a floor slab. A wall 3 is erected between the ceiling slab 1 and the floor slug 2, and an air layer 4 is formed in the wall 3 by the air layer forming method of the present invention to the extent that there is no problem in strength.

Next, an air layer forming method for the above-mentioned building structure will be described. FIG. 2 shows a cross-sectional view of a building structure based on the air layer forming method of the present invention. As shown in FIG. 2, a vinyl air bag 7 as shown in FIG. 3 is arranged in the molds 5 and 6 arranged in parallel. An air layer adjusting plate 8 is interposed on both sides of the air bag 7, and a separator 9 for maintaining a space between the molds 5 and 6 is inserted from one side of the molds 5 and 6 to the other side with the air bag 7 interposed therebetween. ing.
Further, even if the wedges 10 are inserted into both ends of the separator 9 and the concrete 11 is poured in, the molds 5 and 6 are prevented from opening.

An air compressor (not shown)
Press the compressed air into the air bag 7 and inflate it to the specified size. Adjust the size of the air layer 4 according to the shape and the size of the inflatable air bag 7,
The shape of the air layer 4 can be adapted to the shape required for the structure.

After the air bag 7 is inflated, concrete 11 is poured into the molds 5 and 6. After the pouring, when the concrete 11 is solidified, the wedge 10 is removed, the separator 9 is pulled out, and the molds 5 and 6 are fixed to the concrete 1
When peeled from 1, a wall 3 with an air layer 4 is formed. By forming the air layer 4 in this way, the concrete volume can be reduced by the amount of the air layer 4.

The air bag 7 is made of concrete 1
Leave it as it is after setting 1 or use air bag 7
The air bag 7 may be removed to take out the air bag 7 through an extraction hole (not shown).

Next, another embodiment of the air layer forming method of the present invention will be described. FIG. 4 is a plan sectional view of the building structure, and FIG. 5 is a longitudinal sectional view. In these drawings, reference numeral 12 denotes a retaining wall with standing piles 12A, and the retaining wall 12 is spaced at a constant interval. The mold 5 is installed, the air bag 7 is provided by the soil retaining wall 12, and a concrete layer is formed between the soil retaining wall 12 and the mold 5.

In the construction method of the above construction, a pile 12A is driven in to construct a fixed retaining wall 12 in advance, and the formwork 5 is arranged at a constant interval from the retaining wall 12, and the retaining wall 12 is fixed to the retaining wall 12. An air bag 7 is provided along with it. And
Concrete 11 is poured between the retaining wall 12 and the formwork 5. Even when the concrete 11 is poured in this way, the portion of the airbag 7 is the same as the above-mentioned embodiment.
Since one air layer is formed, the volume of the concrete 11 can be reduced accordingly.

[0014]

As described above, according to the present invention, with the above structure, it is possible to form the air layer for reducing the concrete volume of the building structure with a simple construction method and at a low cost. Further, the shape of the air layer can be easily adapted to the shape required for the structure of the building structure.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a building structure constructed based on an air layer forming method of the present invention.

FIG. 2 is a cross-sectional view of a building structure based on the air layer forming method of the present invention.

FIG. 3 is a perspective view of an air bag used in the air layer forming method of the present invention.

FIG. 4 is a plan sectional view of a building structure of another embodiment based on the air layer forming method of the present invention.

FIG. 5 is a vertical sectional view of a building structure of another embodiment based on the air layer forming method of the present invention.

[Explanation of symbols]

 4 Air layer 5 Formwork 7 Air bag 11 Concrete

Claims (1)

[Claims] 1. A formwork for pouring concrete for a building structure is installed, an air bag for forming an air layer is arranged in the building structure, and air is fed into the air bag to inflate it. An air layer forming method in a building structure characterized by pouring concrete.