JP2684961B2 - How to build a building basement wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a basement wall of a building.

[0002]

2. Description of the Related Art In order to construct a basement wall of a building, first, an earth retaining wall that resists lateral pressure such as earth pressure and water pressure is installed on the outside of the basement wall of the planned building, and then the interior is excavated. Is common. As a method of constructing a temporary mountain retaining wall, an H-shaped steel horizontal sheet pile construction method using an H-shaped steel horizontal sheet pile or an H-shaped steel in which the H-shaped steel is inserted as a core material while the soil is solidified into a column Steel-soil mortar column wall construction method is common.

Recently, attempts have been made to utilize a mountain retaining wall constructed in a corner structure in a permanent building. (JP-A-4-1616
In this method, as shown in FIG. 3 (a), the shear connector 3 is provided on the entire surface of the H-shaped steel 1 which is the core of the H-shaped steel soil mortar column wall on the main building side surface. ,
By arranging the reinforcing bars and placing concrete, the reinforced concrete wall 2 and the mountain retaining wall are integrated to construct a building basement wall as a composite wall. Further, when the H-section steel horizontal sheet pile construction method is adopted as the construction method of the mountain retaining wall, the shear connector 3 is provided on the entire surface of the H-section steel 1 on the main building side as shown in FIG. Reinforced concrete wall 2 by placing and placing concrete
It is conceivable to construct a basement wall of the building that integrates the mountain and the retaining wall.

[0004]

SUMMARY OF THE INVENTION In the conventional method of constructing a building basement wall as a composite wall by using the steel aggregate in the earth retaining wall, when the steel aggregate acts as one member of the earth retaining wall. The stress of changes naturally when acting as a member of a synthetic wall, but since the steel aggregate is entirely integrated with the reinforced concrete wall, it is not possible to calculate how the stress changes. Very difficult theoretically and technically. For this reason, it becomes very difficult to design the composite wall, and eventually the retaining wall and the reinforced concrete wall.

Further, when water pressure is applied to the synthetic wall, a tensile force is generated in the shear connector depending on the location, which causes not only rust but also mechanically unfavorable.

The present invention succeeds in resisting lateral pressure such as earth pressure and water pressure of the mountain retaining wall, simplifies the calculation of stress change, facilitates the design of the composite wall, and applies a tensile force to the shear connector. It is intended to provide a method of constructing a basement wall of a building that does not generate it.

[0007]

According to the present invention, a shear connector is provided on a building-side surface of an iron aggregate in an existing mountain retaining wall,
In the method of constructing a building basement wall as a composite wall by placing reinforcing bars and placing concrete, a shear connector is provided only on the surface of the steel aggregate facing the floor of the basement floor of the building, and on the surface of the other parts. Is a method of constructing a basement wall of a building, which is characterized by providing a separating material.

In the present invention, since the earth retaining wall constructed on the outside and the reinforced concrete wall constructed on the inside are integrated only in the floor portion to form a coupled wall, lateral pressure such as earth pressure or water pressure is applied. The reinforced concrete wall should resist the horizontal force such as water pressure and earthquake or wind force that has penetrated from the cliff wall. Therefore, the sharing of stress is simplified and the design becomes easier. Furthermore, since the reinforced concrete wall is integrated with the steel aggregate of the mountain retaining wall only at the floor part, it does not generate tensile force on the shear connector installed in that part, and eliminate the cause of rust generation of the shear connector. You can Further, compared with the case of constructing a reinforced concrete wall as an underground wall independent of a mountain stop wall, the stress shared by the reinforced concrete wall becomes smaller, the thickness of the reinforced concrete wall can be made smaller, and the amount of reinforcing bars can be reduced. Especially, in some cases, reinforcing bars may be omitted in the wall portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows a building underground wall constructed according to the present invention. (A) is a longitudinal sectional view, (b) is a view taken along the line AA of (a), and (c) is (a). It is a BB arrow line view.

The H-shaped steel soil mortar column wall is constructed at a predetermined place by the H-shaped steel soil mortar column wall construction method, and the site is closed. Excavating the inside of the H-section steel soil mortar column wall,
H-shaped steel soil The soil portion inside the column wall of the mortar is cut to expose the surface of the H-shaped steel 1. Of the surface of H-section steel 1,
The necessary number of shear connectors 3 are welded to the location facing the floor of the basement floor of the building, and the spacer 5 is bonded to the other locations (locations facing the wall). As the spacing member 5, an elastic body such as a soft rubber plate or a foamed styrene plate is used. As the shear connector 3, a normal one is used as shown in FIG. Reinforcing bars are arranged on the inside of the pillar row wall, ordinary wall form and floor form are assembled, concrete is poured, and after hardening, the wall form and floor form are removed, and the basement wall part 2 and Build the floor part 4 of the basement floor of the building. The basement wall part 2 is in contact with the H-shaped steel 1 with the spacer 5 interposed therebetween, and the floor part 4 of the basement floor is H-shaped by the shear connector 3.
It is integrated with shaped steel 1. Therefore, the force applied to the H-section steel 1 is not directly transmitted to the underground wall portion 2.

In FIG. 1, H is used as a construction method for constructing the mountain retaining wall.
Although an example of adopting the section steel soil mortar column wall construction method is shown, when a mountain stop wall is constructed by the H-section steel horizontal sheet pile construction method, the compound wall of the mountain stop wall and the reinforced concrete wall is constructed in exactly the same manner. It However, in this case, there is no step of cutting the soil mortar portion inside the column wall, and the surface of the H-section steel 1 exposed by excavation may be cleaned. Further, in the present invention, not only H-shaped steel but also T-shaped, L-shaped, and groove-shaped steel is used as the steel aggregate.

[0013]

[Effects of the Invention] Since the earth retaining wall constructed on the outer side and the reinforced concrete wall constructed on the inner side are integrated only in the floor portion to form a coupled wall, the stress between the mountain retaining wall and the reinforced concrete wall is reduced. The sharing becomes simple and the design becomes easy. Furthermore, since the reinforced concrete wall is integrated with the steel aggregate of the mountain retaining wall only at the floor part, it does not generate tensile force on the shear connector installed in that part, and eliminate the cause of rust generation of the shear connector. You can

[Brief description of the drawings]

FIG. 1 shows a building basement wall constructed according to the present invention,
(A) is a longitudinal sectional view, (b) is a view taken along the line AA of (a),
(C) is a BB arrow view of (a).

FIG. 2 is a perspective view showing a shear connector used in the present invention.

[Fig. 3] Fig. 3 is a plan sectional view showing a building basement wall in which a building basement wall is constructed by a conventional construction method using H-section steel as a core material of a mountain retaining wall, and (a) is an H-section steel soil mortar column. The row wall method is used, and (b) is the H-shaped steel horizontal sheet pile method.

[Explanation of symbols]

1 ... H-section steel, 2 ... Building basement wall part, 3 ... Shear connector, 4 ... Building floor part, 5 ... Separating material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Nakamura 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Jiro Kikuta 1-3-3 Moto-Akasaka, Minato-ku, Tokyo No. 8 Kashima Construction Co., Ltd. Tokyo Branch (56) References JP-A-4-80430 (JP, A) JP-A-4-161616 (JP, A) JP-A-4-131428 (JP, A)

Claims (1)

(57) [Claims] 1. A method for constructing a building basement wall as a composite wall by providing a shear connector on the building-side surface of a steel aggregate in an existing mountain retaining wall, arranging reinforcing bars and placing concrete in the building basement. A method for constructing a building basement wall, characterized in that a shear connector is provided only on the surface of the steel aggregate facing the floor of the floor, and a spacer is provided on the surface of the other parts.