JPH0444523A - precast concrete basement - Google Patents

Abstract

PURPOSE:To reduce costs by combining a basement wall of precast concrete plates and the concrete foundation of a ground building with steel coupling members. CONSTITUTION:The concrete foundation 7 is formed of a strip footing consisting of a strip 8 and footing 9. Cylindrical nuts 10 and 10 buried in advance are provided to the outside of the upper ends of wall panels 2 and 3 constituted of a basement wall so that they are exposed to the outside of them, steel coupling bars 11 provided with male screws are screwed in the cylindrical nuts 10, and they are mounted in advance in a state to project them outward. After that, the necessary reinforcing steel is placed to the outside thereof to construct the concrete foundation 7, and the coupling bars 11 are buried in the foundation 7 as a unit. According to the constitution, bearing force of the concrete foundation is increased, and the number of works can be reduced.

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 supported by a concrete foundation slab usually 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 like above, but these concrete foundations and basement walls are interrelated. Therefore, the foundation of an above-ground building must have a strong structure itself, 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 a basement wall made of precast concrete plates and a concrete foundation of an above-ground building are integrally connected to each other by a steel connecting member. According to the configuration of the present invention, the concrete foundation of the above-ground building is integrally connected to the basement wall via the connecting member, so the strength is high (this concrete foundation can be connected to the basement wall as in the past). There is no need to build something strong enough to support an above-ground building by itself.

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. (1) As shown in Figure 3, install precast concrete wall panels (2) and (3) on top of the wall panels (2) and (3).
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)
An upper beam (4) is installed at the upper end of the basement and the basement wall (5) is constructed by connecting them to each other (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 a cloth portion (8) and a footing B (9). On the outer surface of the upper end of the wall panel (2>(3) constituting the basement wall, a cylindrical nut (10) (10) is provided which is buried in advance so as to be exposed on the outer surface.
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 the 1st II, the upper beam (4) arranged at the upper end of the wall panel (2) (3) and connecting each wall panel is made of H-beam steel, and its flange (12) is connected to the wall panel (2) (3).
) are installed so that they are parallel to each other on both the inside and outside sides of the upper beam (4).
A base (15) is installed with the flanges (14) (14) arranged vertically parallel to each other via the base (13). 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 especially effective on soft ground, and conversely, in the case of normal ground, the concrete foundation There is no need to make the structure itself strong enough to support 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 3 Figure 5 Figure 6 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.