JPH0127223B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing a basement such as a shelter.

(Prior art and its problems) Conventionally, in the construction method of basements such as shelters, as shown in Figure 4, the required space is first excavated, a waterproof sheet a is laid on the floor surface, and then a waterproof sheet a is laid on the floor surface. Concrete B is poured on the concrete B, and formwork for the side walls and ceiling is then set and concrete is poured to form the side walls and ceiling, and the outer periphery of the concrete for the side walls etc. is covered with waterproof sheet A to form a waterproof layer. Common.

However, in this construction method, in order to form the above-mentioned waterproof layer, it is necessary to excavate an extra working space c than the space allotted for the basement, and it is necessary to excavate not only the underground space but also the working space c. , a considerable amount of free space is required even on the ground.

Therefore, when only the underground space appropriate for a basement can be secured, the above-mentioned waterproof layer cannot be formed using the conventional construction method, and there is a problem that the basement cannot be constructed.

(Problem) The present invention is a method for constructing a basement with concrete walls, so that the basement can be constructed as long as the underground space appropriate for the basement can be secured.
The object of the present invention is to enable members constituting the inner surface of walls to exhibit a waterproof function and a function as formwork for concrete, and to enable construction of the members from within.

(Means) The technical means of the present invention for solving the above problem is that in a method of constructing a basement such as a shelter having concrete walls, concrete is poured on the bottom of the excavated recess, and the inner wall of the basement is placed on the concrete. A side wall steel plate for a corner with an L-shaped cross section and a rectangular side having joints on the inside of both sides and receiving bars protruding inward at both the upper and lower ends. The inner wall of the basement is formed by erecting side wall steel plates in series and welding the joints together, and by bringing square steel plates into contact with each other from the inside of the receiving crosspiece, and by welding the joints together. The floor and ceiling of the basement walls are formed by welding steel plates and side wall steel plates, and then a concrete outer wall is formed around the outer periphery of this steel plate inner wall.

(effect) The technical means of the present invention works as follows.

The steel plates that make up the inner walls of the basement are welded together to form a box-like body, and this box-like body is erected on a concrete layer at the bottom of a pre-formed recess below the ground.

If this box-shaped body is placed at a predetermined position within the excavated recess, a gap will be created around the outer periphery of the box-shaped body that approximately coincides with the concrete wall, and the side walls of the box-shaped body will be used as formwork. During this time, concrete is poured in between to complete the basement, and in this completed state, the box-shaped body exhibits a waterproof effect.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

To construct a basement, a space equivalent to a concrete wall must be created between the steel plate side wall and the inner periphery of the excavated recess.
All you need is a basement, and if you can secure an underground space that roughly corresponds to a basement as a whole, you can build a basement.

Therefore, there is no need to excavate extra underground space, so a basement can be constructed at low cost.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

In this example, the present invention was implemented in a basement for a shelter or a safe.
An excavated recess is formed that roughly corresponds to the basement, concrete is poured on the floor, and after curing, a side wall 1 as shown in FIG. 1 is formed on the upper surface as a support beam for the floor 7 and ceiling 8. Rectangular side wall steel plates 4 and 5 with angle-shaped members 2 and 3 arranged at both upper and lower ends are arranged in a row.

There are two types of side wall steel plates 4 and 5, one for corners and one for sides, and the side wall steel plate 4 for corners is a rectangular steel plate with an L-shaped cross section, with both sides bent outward into an inverted L shape, and further, The end portion is bent inward into a substantially L-shape to form a joining channel 6, and the side wall steel plate 5 for side portions is formed by bending both sides of a rectangular steel plate in the same manner as the corner side wall steel plate 4. 6 was formed.

A first angle-shaped member 2 that receives the floor steel plate 9 is welded to the lower end of each of the side wall steel plates 4 and 5 from the outside so that one side thereof projects inwardly, and a second angle-shaped member 2 that receives the ceiling steel plate 10 at the upper end thereof is welded from the outside so that one side thereof projects inwardly. The chevron 3 is replaced by the first chevron 2.
It is welded in the same way.

As shown in FIGS. 1 and 3, these side wall steel plates 4 and 5 are erected in the procedure described above, and adjacent side wall steel plates 4 and 5 are
When the joining channels 6 are welded together, the entire area of the side wall 1 of the inner wall of the basement is completed.

Note that when the joining channels 6 are welded together, a concave groove portion 11 protruding outward from the side wall 1 is formed on the inner surface of the side wall 1, and this portion is covered with a cover plate 12 having a U-shaped cross section and a fit-in type. . Therefore, this recessed groove can be used as a space for wiring and piping, and after storing the wiring and piping, the cover plate 12 can be fitted to protect the inside.

Then, a plurality of rectangular floor steel plates 9 are laid on the first angle-shaped member 2, and the side parts of the adjacent floor steel plates 9 and the side wall steel plates 4 and 5 in contact with the steel plates 9 are welded, A floor surface 7 is formed.

Here, the entrance/exit 13 is placed in advance at a predetermined position on the side wall 1.
Needless to say, it is necessary to form a

Next, a plurality of rectangular ceiling steel plates 10 are attached to the side wall 1.
The ceiling is stretched over the second angle-shaped member 3 disposed at the upper end of the basement, and the side parts of the adjacent ceiling steel plates 10 and the side wall steel plates 4 and 5 in contact with the steel plates 10 are welded from inside the basement. 8, the box-shaped body A is completed and constitutes the inner wall of the basement.

As shown in FIG. 2, an opening 14 is formed which is surrounded by the ceiling steel plate 10 and the side wall 1 forming the groove 11, and a joining channel 6 is located vertically in the center of the groove 11. The upper end of the wrapped portion is slightly cut out, and a contact plate 15 is welded to the upper part from the inside, thereby forming the opening 14.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a box-shaped body that becomes the wall body of a basement in an embodiment of the present invention, Fig. 2 is a detailed view of a groove, Fig. 3 is a cross-sectional view of the basement, and Fig. 4 is a conventional example. It is an explanatory diagram, and in the figure, 1... side wall, 2... first angle-shaped member, 3... second angle-shaped member, 4... side wall steel plate for corner, 5... side wall steel plate for side part, 6... joint channel, 7...floor surface, 8...ceiling, 9...floor steel plate, 10...ceiling steel plate, A...box-shaped body, B...concrete wall, a
...waterproof sheet, b...concrete, c...work space.

Claims (1)

[Claims] 1. In the method of constructing a basement such as a shelter with concrete walls, concrete is poured on the bottom of the excavated recess, and parts corresponding to the corners and sides of the inside wall of the basement are joined on the concrete to the inside of both sides, respectively. A corner side wall steel plate having an L-shaped cross section and a rectangular side wall steel plate having a receiving bar projecting inward from both the upper and lower ends are erected in series, and the joints are welded to each other. The inner wall of the basement is formed using a rectangular steel plate, which is brought into contact with the receiving crosspiece from the inside, and these rectangular steel plates are welded to each other and to the side wall steel plate, thereby forming the floor and ceiling of the basement wall. A method of constructing a basement, such as a shelter, in which a concrete outer wall is formed around the outer periphery of the steel plate inner wall.