JPH10298976A - Foundation structure for building bound with soil cement column row earth retaining wall to skeleton - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the yield strength against horizontal force at the time of an earthquake by burying an H-steel in soil cement, scraping off the soil cement on the skeleton side of a structure formed by excavating the ground, arranging a reinforcing bar or stud connectors, and integrating the structure skeleton and an earth retaining wall. SOLUTION: An H-steel 4 is buried in a soil cement column earth retaining wall 1, the soil cement on the skeleton 5 side of a structure formed by excavating the ground is scraped off, and a reinforcing bar 2 or stud connectors 3 are arranged. The strong side axis of the H-steel 4 buried in the soil cement column earth retaining wall 1 is directed to the direction along the soil cement column earth retaining wall 1. A shear cotter 6 is formed between the flanges of the H-steel 4 to integrate the soil cement column earth retaining wall 1 and the structure skeleton 5. The stress transfer performance between the skeleton 5 and the earth retaining wall 1 against the shearing force at the time of an earthquake can be strengthened. The yield strength against horizontal force at the time of the earthquake can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building constructed on liquefied ground, soft ground, etc., and relates to a foundation structure capable of effectively transmitting a horizontal force generated in the ground during an earthquake.

[0002]

2. Description of the Related Art Pile foundations are used as the foundations of many structures because they have characteristics such as a reliable bearing capacity and excellent economic efficiency.
Pile has weak point against horizontal load and weak point against horizontal load due to its structural characteristics. When a large horizontal load is applied, it is necessary to sufficiently consider that the generated displacement and bending stress do not impair the safety of the structure.

[0003] Buildings constructed on liquefied ground, soft ground, etc., generally support the building with pile foundations, but the piles are subjected to large bending stress due to the horizontal force during an earthquake. By increasing the number or bending strength, safety is ensured. Heretofore, a soil cement column row retaining wall method has been used as a retaining wall for underground excavation.

[0004] When constructing an underground structure, when soil is excavated by receiving earth pressure using a soil cement pillar array retaining wall, when the ground is excavated, the structure is usually constructed because the retaining wall is a temporary material. After that, they are left as unnecessary things,
In the present invention, this is utilized integrally with the main body of the underground structure to resist the horizontal load, which is a weak point of the pile. It is another object of the present invention to provide a structure in which the soil cement pillar array retaining wall and the skeleton are integrated with each other so as to effectively resist horizontal seismic force.

[0005]

Means for Solving the Problems In the soil cement pillar row retaining wall, an H-shaped rope is buried in the soil cement, the soil cement on the skeleton side of the structure for excavating the ground is scraped off, and reinforcing bars or stud connectors are arranged. The main purpose of the present invention is to provide a foundation structure of a building in which a soil-cemented column-arranged retaining wall is tightly attached to a structural body, wherein the structural body is integrated with the retaining wall.

Next, the operation will be described.

FIG. 1 is a basic plan view of the structure. For example, when a seismic horizontal force acts in the direction of the arrow, the horizontal force is mainly borne by the soil cement pillar row retaining wall 1 along the horizontal force. Therefore, in order to efficiently withstand the horizontal force, the strong axis of the H-section steel buried in the continuous underground wall of the ridge is along the direction of the horizontal force as shown in FIG. Conventionally, only resistance to earth pressure has been considered, and as shown in FIG.
The direction of the strong axis of the section steel was perpendicular to the direction of the retaining wall.

Further, as shown in FIG. 4 or 5, the soil cement integrated with the structural body is scraped off,
The reinforcing bar 2 or the stud connector 3 is provided. And H
The shear cotter 6 is formed between the flanges of the section steel 4, and the stress transmission performance between the skeleton and the retaining wall against shearing force during an earthquake can be enhanced.

[0009] Even if the direction of the strong axis of the H-section steel buried in the soil cement as in the past is perpendicular to the horizontal force at the time of the earthquake, the soil cement on the skeleton side of the structure is scraped off to remove the stud connector or the stud connector. Even when the reinforcing steel is welded, the skeleton and the retaining wall are integrated depending on the expected strength, so that the stress transmission performance between the skeleton and the retaining wall against the shearing force during an earthquake can be strengthened.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a basic plan view of the structure.

FIG. 2 (a) is a diagram showing the direction of the strong axis, the direction of the horizontal force at the time of the earthquake, and the direction of the earth pressure of the H-section steel buried in the soil cement pillar retaining wall of the present invention. (B) is a diagram showing a conventional direction.

FIG. 3 (a) shows that when the strong axis of the H-section steel is aligned with the surface of the soil cement pillar row retaining wall, the retaining wall 1 on the structure body side is scraped off and the flange of the H-section steel 4 is removed. FIG. 3 is a diagram in which a skeleton 5 is buried between a flange and a flange to form a shear cotter 6. (B) shows a case in which the strong axis of the H-section steel is buried at right angles to the soil cement pillar row retaining wall, and the retaining wall 1 on the structure body side.
And stud connector 3 on H-section steel 4 flange
Or it is a figure before welding the reinforcing bar 2. (C) is (a)
It is an elevational view of FIG. 1 and shows a place where the soil cement pillar row retaining wall 1 for supporting the skeleton is embedded in the supporting ground layer 8.

FIG. 4 is an example of a detailed view of the shea cotter 6,
FIG. 4 is a diagram in which a reinforcing bar 2 and a stud connector 3 are disposed in a pocket between flanges of a section steel 4. FIG. 5 also shows shea cotta 6
FIG. 3 is an example of a detailed view of FIG. 1, in which a reinforcing bar 2 is welded to a pocket between H-shaped steel flanges. With these shea cotta, the shear force transmission performance between the skeleton and the retaining wall is greatly enhanced.

FIG. 6 shows that the strong axis of the H-section steel 4 is buried in a direction perpendicular to the horizontal force at the time of the earthquake, and the stud connector 3 or the reinforcing bar 2 is disposed on the flange of the H-section steel, and the structural body 5 and the soil It is a figure which is going to be integrated with a cement pillar row retaining wall 1.

[0016]

The present invention has the above-described configuration,
The effect is as follows.

By integrating the underground foundation not only with the pile but also with the soil cement pillar row retaining wall and the structural body,
Strength against horizontal force during earthquake is increased.

Since a reinforcing bar or a stud connector or the like is provided on the H-section steel and a shear cotter is formed to integrate the soil cement pillar row retaining wall and the structural body, the shearing force between the structural body and the retaining wall is formed. Transmission performance is enhanced.

Since the direction of the strong axis of the H-section steel buried in the soil cement pillar row retaining wall is set to the direction along the retaining wall, the horizontal strength in the event of an earthquake is more effectively enhanced.

Even when the direction of embedding the strong axis of the H-section steel is perpendicular to the retaining wall, a sufficient horizontal shearing force can be transmitted depending on the expected strength of the stud connector or the like.

[Brief description of the drawings]

FIG. 1 is a basic plan view of a structure.

FIG. 2 (a) is a diagram showing the direction of the strong axis, the direction of the horizontal force at the time of the earthquake, and the direction of the earth pressure of the H-section steel buried in the soil cement pillar row retaining wall of the present invention, (B) is a diagram showing a conventional direction.

FIG. 3 (a) shows a case where the strong axis of the H-section steel is aligned with the surface of the soil cement pillar row retaining wall, and the retaining wall 1 on the structure skeleton side is scraped off and the flange of the H-section steel 4 is removed. FIG. 3 is a diagram in which a skeleton 5 is embedded between flanges to form a shear cotter 6.
(B), when the strong axis of the H-section steel is buried at right angles to the soil cement pillar row retaining wall, the retaining wall 1 on the structural body side is cut off, and the stud connector 3 or the reinforcing bar 2 is attached to the flange of the H-section steel 4. It is a figure before welding. (C) is an elevational view of (a), and is a view showing that the soil cement pillar row retaining wall 1 that supports the skeleton is embedded in the supporting ground layer 8.

FIG. 4 is an example of a detailed view of the shear cotter 6, in which a reinforcing bar 2 and a stud connector 3 are arranged in a pocket between flanges of an H-section steel 4;

FIG. 5 is an example of a detailed view of the shear cotter 6, in which a reinforcing bar 2 is welded to a pocket between H-shaped steel flanges.

FIG. 6 embeds the strong axis of the H-section steel 4 in a direction perpendicular to the horizontal force at the time of the earthquake, arranges the stud connector 3 and the reinforcing bar 2 on the flange of the H-section steel, and constructs the structure body 5 and the soil cement column. It is a figure which is going to be integrated with a row stop wall 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Soil cement pillar row retaining wall 2 ... Reinforcing bar 3 ... Stud connector 4 ... H-shaped steel 5 ... Structural body 6 ... Sia cotta 7 ... Pile 8 ... Support ground

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takahiro Nakajima Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo

Claims (1)

[Claims] In a soil cement pillar row retaining wall,
By embedding an H-shaped rope in soil cement, shaving off the soil cement on the skeleton side of the structure where the ground is to be excavated, arranging a reinforcing bar or a stud connector, and integrating the structural body with the retaining wall. The foundation structure of the building, which is made up of the characteristic soil-cement pillar-column stop wall and the skeleton.