JPS6043529A - Mat foundation and its construction - Google Patents

Abstract

PURPOSE:To permit direct setting of interiors of floor on the upside of a slab by a method in which a formwork is assembled along the periphery of the slab, many steel pipes for forming a hollow are set horizontally in parallel, and concrete is placed in to the space surrounded by the formwork. CONSTITUTION:A trench 11 is excavated along the peripheral footing portion of a slab and cobble stones 12 are laid in the trench 11 and on the building land surrounded by the trench 11. A moisture-proof sheet 16 is then laid over the whole surface of the cobble stones 12 on the building land. A formwork 13 is assembled along the periphery of the slab, reinforcing bars 14 are set, many steel tubes 15 for forming a hollow are horizontally set in parallel, and concrete is placed into the space surrounded by the formwork 13. The upside of the slab is leveled to enable the floor interior, e.g., carpet, mat, etc., to be directly set on the upside of the slab.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid foundation and its construction method.

Conventional solid foundations lay on the front of the slab. After excavating the ground, placing slabs and reinforcing, concrete was poured twice for the slab and foundation beams. However, with this construction method, the ground is excavated over the entire surface of the slab, which creates problems in disposing of the remaining soil.
It has the disadvantage of being expensive to discharge. Therefore, the method shown in Figure 1 has been considered as a construction method that solves this problem of disposal of residual soil. In the construction method shown in Fig. 1, a trench (2) is excavated only in the part where the foundation beam 11) passes;
) and the groove (2), then concrete is placed on the slab (3), and then the foundation beam (1) and the partition foundation (4) are placed. )
By pouring concrete in the area and excavating the trench (2);
The discharged soil is spread over the old ground GLI around the outer periphery of the foundation to obtain new ground OL2.

According to the method shown in Figure 1, only the area where the foundation beam (1) passes is excavated, and all the soil obtained through this excavation is distributed around the outside, which has the advantage of solving the problem of disposal of remaining soil. However, even with this construction method, concrete is poured separately into the slab (3), foundation beam (1), and partition foundation (4), so it is necessary to pour concrete on two sides. Formwork had to be built on the inside of the beam (11) and the partition foundation (4), which required a large amount of formwork, and if it rained during the construction period,
Rainwater accumulates inside the foundation beam +11, so there are drawbacks such as the need to drain water.

The present invention provides a solid foundation and its construction method that eliminate the above-mentioned conventional drawbacks, and the solid foundation of the present invention has a hollow part formed inside and the upper surface of the solid foundation is made of carpet. The method of the present invention is characterized in that it has a flat shape that allows for direct construction of floor interior materials such as earwood and tatami mats, and furthermore, the construction method of the present invention involves forming a trench by excavating only the foot part to be embedded into the ground. Then, a steel pipe for forming a hollow part is placed along with reinforcement on the electric panel surrounded by this groove, and concrete is poured, and after that, floor interior materials such as carpet and tatami mats can be directly applied to the upper surface of the concrete. It is characterized by leveling to make it flat.

The structure of the present invention will be explained below according to the construction order. First, as shown in Fig. 2, in order to secure the necessary penetration depth, a groove (1
1) is excavated, and a chestnut stone (12) is laid on this groove (11) and the electrical panel surrounded by the groove (11).

Next, as shown in Figure 3, formwork (1
3) and perform reinforcement (14), at which time a large number of steel pipes (15) (15) for forming hollow parts are arranged horizontally in parallel. As such a steel pipe (15), a thin-walled steel pipe commonly called a winding pipe is used. Further, a moisture-proof sheet (16) is spread over the entire surface of the chestnut stone (12) on the surface plate.

After assembling the reinforcement <14) and formwork (13) as described above, and installing the steel pipe (15) and moisture-proof sheathing (16), in the space surrounded by the formwork (13), Fourth
Concrete is poured as shown in the diagram, and then the slab (1
7) The upper surface (17a) is leveled with a self-leveling material or the like to make it flat so that a flooring material such as carpet or tatami can be directly applied to the upper surface (17a). still,
The ends of the steel pipes (15) are sealed with concrete. Also, in the groove (11), there is a concrete foot (
18) is formed, and finally, the soil obtained by excavating the trench (11) is used to backfill this trench (11) and to spread it over the field ground around the outer periphery of the slab (17) to create a new soil. Ground G
Obtain L2.

Since the solid foundation and its construction method of the present invention are as described above, in addition to the same advantages as shown in Fig. 1, in which the amount of excavated soil is small and there is no problem of disposal of remaining soil, the following effects can be obtained.

■Concrete pouring is only required once, significantly shortening the construction period.

■Since interior materials can be constructed on the top surface of the slab, there is no need to protrude the foundation beams like in the past (therefore, even if it rains during the construction period, rainwater will not accumulate, No water removal process is required.

■ Concrete on two sides, divided into slab part and foundation beam part.
Since there is no need to perform concrete pouring and the formwork only needs to be assembled on the outer periphery of the slab, the required formwork area is significantly reduced by about a third.

(2) As mentioned above, floor interior materials, etc. can be applied directly to the top surface of the slab, so there is no need for stacking stones or floor assemblies, and costs are significantly reduced.

■Same (because flooring materials can be installed directly on the top of the slab, floor vibrations, etc. are completely eliminated).

■The thickness of the slab part is large and it is hollow, so it has high heat retention.

■Since the interior is hollow, the amount of concrete is
It is only slightly more than the conventional solid foundation, and moreover,
Due to the hollow part, the weight is not very large,
There is no problem in using this type of solid foundation on soft ground.

■By laying a moisture-proof sheet on the back of the slab, you can completely eliminate moisture under the floor.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a conventional solid foundation, and FIGS. 2 and 3 are cross-sectional views showing a method of constructing a solid foundation according to the present invention.
FIG. 4 is a cross-sectional view of the main part of the solid foundation of the present invention. (1,1) - Groove, (14) - Reinforcement, (15) -・
- steel pipe, (7) - slab, (17a) - upper surface of slab,
(18) - Root foot. Patent Applicant: Block House Co., Ltd. Representative Patent Attorney Hisashi Tarumoto

Claims (1)

[Scope of Claims] (1) A solid foundation characterized by having a hollow part formed inside and the upper surface of the solid foundation having a flat shape to which floor interior materials such as carpets and tatami mats can be directly applied. . 2. Excavate only the foot part to be embedded into the ground to form a trench, place reinforcing and steel pipes for forming hollow parts on the building board surrounded by this trench, and pour concrete.
A method for constructing a solid foundation, characterized in that the upper surface of the concrete is then leveled to make it flat so that floor interior materials such as carpet and tatami mats can be directly applied.