JP2565071B2 - Column-type underground continuous 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 column-type underground continuous wall having enhanced out-of-plane rigidity.

[0002]

2. Description of the Related Art A column-column type underground continuous wall used as a mountain retaining wall or the like secures rigidity in the out-of-plane direction by a core material such as a reinforcing bar or a steel frame inserted into a pile. When, for example, an H-shaped steel is used as the core material, its formation depends on the cross-sectional area of the pile, and therefore, when high rigidity is required, the pile diameter must be increased, which is uneconomical.
If self-sustainability cannot be achieved with only the column, it will be necessary to install beams and earth anchors, which will increase the number of construction steps.

The present invention has been made in view of such a background, and an object of the present invention is to newly propose an underground continuous wall which can increase the out-of-plane rigidity without requiring an increase in the pile diameter.

[0004]

According to the present invention, a cross section of a hole into which a core material is inserted is formed into a continuous shape by wrapping two circles in the wall thickness direction, and the core material is formed into a cross sectional shape of the hole. By giving a corresponding size, the out-of-plane rigidity is increased without increasing the pile diameter.

The continuous wall is constructed by alternately stacking two circular piles and circular piles in the wall thickness direction, and the core material is inserted into a drilled hole made of two circular circles. The core material is about twice as large as when it is inserted into a circular hole, increasing the out-of-plane rigidity of the continuous wall and increasing self-sustainability, eliminating the need for a girder or earth anchor. It

[0006]

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

The underground continuous wall 1 of the present invention is a column-type underground continuous wall into which every other core member 2 is inserted as shown in FIGS. As shown in FIG. 1, the size is about twice that of the single circular drill hole 4.

The drilled hole 3 into which the core material 2 is inserted is 2 in the wall thickness direction.
The circles are wrapped to form a continuous cross-sectional shape, the hole 4 adjacent to the hole 3 that is long in the wall thickness direction has a circular shape, and the underground continuous wall 1 has two types as shown in FIG. Shaped holes 3, 4
Are constructed alternately and continuously. The boring hole 3 is drilled by making the auger at the end of the multi-axis excavator movable and arranging the auger in the wall thickness direction.

As in the conventional construction, after excavating at least one drilling hole, muddy water and cohesive soil are stirred and mixed, or mortar or concrete is filled, and the core material 2 is inserted into the drilled hole 3. It is done in the way.

In the present invention, since the core material 2 has a size about twice as large as that in the case where it is inserted into the circular drilled hole 4, the out-of-plane rigidity of the underground continuous wall 1 increases, and The free-standing height of the ground up to the ground surface can be made large, and no beams or earth anchors are required to make it self-supporting.

[0011]

The present invention is as described above, and the cross section of the hole into which the core material is inserted is made into a continuous shape by wrapping two circles in the wall thickness direction, and the cross section of the hole is formed in the core material. Since the size corresponds to the shape, the out-of-plane rigidity can be increased without increasing the pile diameter, the self-sustainability is enhanced, and the crossbeam and earth anchor for self-standing can be eliminated. it can.

[Brief description of drawings]

FIG. 1 is a plan view showing an outline of the present invention.

FIG. 2 is a perspective view showing an example of construction of an underground continuous wall.

FIG. 3 is a plan view of FIG. 2;

[Explanation of symbols]

1 ... Underground continuous wall, 2 ... Core material, 3 ... Drilling, 4 ... Drilling.

Claims (1)

(57) [Claims] 1. A column-column-type underground continuous wall in which a core material is inserted into every second drilled hole in the length direction, and two drilled holes in which the core material is inserted are formed in the wall thickness direction. A column-lined underground continuous wall characterized in that circles wrap and have a continuous cross-sectional shape, and the core material has a size corresponding to the cross-sectional shape of the drilled hole.