JPH0447030A - Basement made of precast concrete - Google Patents

Abstract

PURPOSE:To reduce cost by integrally connecting a basement wall made of precast concrete plates and a concrete base of an above-ground building to each other with connecting members made of steel. CONSTITUTION:The lower beams 1 are established on the ground, wall panels 2, 3 made of precast concrete are established on the beams 1, and respective wall panels 2, 3 and the beams 1 are connected together. Next, the upper beams 4 are established on the top ends of respective wall panels 2, 3, to construct a basement wall body 5, which is sunken to a specified depth while discharging soil inside the wall body 5, and base plate concrete 6 is placed at the bottom part. Next, connecting rods 11 are screwed into tubular nuts 10, 10 previously buried in the top end outer side face of the wall panels 2, 3, arrangement of reinforcement is performed outside thereof, and a concrete base 7 is constituted. It is thereby possible to reduce cost with no need of making a strong construction by integrating the basement wall body 5 and the concrete base 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a basement made of precast concrete plates, and in particular to the structure associated with the foundation of an above-ground building built on top of the basement.

BACKGROUND OF THE INVENTION Basement construction methods in which basement walls made of precast concrete plates are buried underground have been known for some time. In this case, when a building is constructed above the basement, a concrete foundation is further constructed around the basement, and the above-ground building is constructed on this concrete foundation.

Problems to be Solved by the Invention In the above-mentioned conventional basement and above-ground building structures, the bottom of the basement wall is usually supported by a foundation concrete slab cast on site, resulting in a highly strong underground structure.

When an above-ground building is constructed on top of this basement, another concrete foundation is constructed and constructed as described above, but these concrete foundations and basement walls are constructed without any relationship to each other. and therefore,
The foundation of an above-ground building must itself have a strong structure, which has the disadvantage of increasing costs accordingly.

The present invention aims to eliminate such conventional drawbacks.

Means for Solving the Problems In order to solve the above problems, the present invention is characterized in that the basement wall made of precast concrete plates and the concrete foundation of the above-ground building are integrally connected to each other by a steel connecting member.

According to the configuration of the present invention described above, the concrete foundation of the above-ground building is connected to the basement wall via the connecting member, so the strength is high, and this concrete foundation can be attached to the ground by itself as in the past. There is no need to build something strong enough to support the building.

Example Figure 2 and the following diagrams show the construction method for this type of basement according to the construction order. First, as shown in Figure 2, the lower beam (1) is installed on the ground, and then this lower beam is installed. As shown in Figure 3, install precast concrete wall panels (2>(3) on top of (1), and
are connected to each other, and each wall panel (2) (3) and the lower beam (1) are connected to each other. Furthermore, each wall panel (2) (3)
A lower beam (4) is installed at the upper end of the basement and the lower beam (4) is connected to each other to construct the basement wall (5) (Fig. 11). Next, as shown in FIG.
) is forced in, the soil inside is discharged, and the soil is allowed to sink to a predetermined depth, after which a concrete foundation slab (6) is poured at the bottom, as shown in Figure 4.

Next, as shown in Figure 6, after the basement wall (5) is constructed, a concrete foundation (7) is placed on the surrounding ground.
is constructed, and an above-ground building is constructed on this concrete foundation (7).

Figure 1 shows the connection structure between the basement wall (5) and the concrete foundation (7), and the concrete foundation (7) is
This is a cloth foundation consisting of cloth B (8) and a footing part (9). Cylindrical nuts (10) (10) are provided on the outer surfaces of the upper ends of the wall panels (2) and (3) constituting the basement walls, and are buried in advance so as to be exposed on the outer surfaces.
A steel connecting rod (11) equipped with a male screw is screwed into this cylindrical nut (10) and attached in advance in a state in which it protrudes outward. Thereafter, necessary reinforcement is placed on the outside to construct a concrete foundation (7), and the connecting rod (11) is buried integrally within the foundation (7).

At that time, it is desirable that the connecting rod (11) and the reinforcement in the concrete foundation (7) be tied together or welded together.

In addition, in Fig. 1, the lower beam (4) arranged at the upper end of the wall panel (2>(3) and connecting each wall panel is made of H-shaped steel, and its flange (12) is connected to the wall panel (2) ( 3)
The support plate (1) is installed parallel to each other on both the inside and outside of the
3), a base (15) is installed in which the seven lunges (14) (14) are arranged vertically in parallel. This foundation (15) is used, for example, to support floor beams of above-ground buildings.

Effects of the Invention As described above, according to the present invention, the basement wall made of precast concrete plates and the concrete foundation of the above-ground building are integrally connected to each other via the connecting member, so that the concrete foundation of the above-ground building is supported by the basement walls buried deep underground, increasing the bearing capacity of this concrete foundation, making it particularly effective in soft ground, for example; conversely, in the case of normal ground, concrete IJ - There is no need for the foundation itself to have a strong structure capable of supporting an above-ground building, and the number of construction steps can be reduced accordingly, or the basement walls can be reinforced by this fabric foundation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the main part showing the connection structure between the upper end of the basement wall and the cloth foundation, showing an embodiment of the present invention, and Figs. 2 to 4 are perspective views showing the construction method of a precast concrete basement. , FIG. 5, and FIG. 6 are also longitudinal cross-sectional views. (2) (3) External wall panel, (5) Basement wall, (7) Concrete foundation, (11) Connecting rod. Patent applicant: Sekisui House Co., Ltd. Representative Patent Attorney Hisayuki Tarumoto Figure 1 Figure 5 Figure 6 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] A precast concrete basement characterized by a basement wall made of precast concrete plates and a concrete foundation of an above-ground building integrally connected to each other by a steel connecting member.