JP2876451B2 - Construction method of L-shaped retaining wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] Construction method of L-shaped retaining wall used for construction of roads and residential land.

[0002]

2. Description of the Related Art As shown in FIG. 1, when a conventional L-shaped retaining wall is used for the construction of a road or a residential land, first, after excavating a width equivalent to the bottom surface 101b of the L-shaped retaining wall 101, a foundation is formed on the bottom surface 101b. At least two piles 103 are driven. Next, after the reinforcing bar 104 is implanted in the foundation pile 103, the foundation concrete 102 is cast.

[0003] Finally, an L-shaped retaining wall 101 is placed and fixed on a foundation concrete 102. By the way, in such a conventional construction method, the L-shaped retaining wall 101 in which only two foundation piles 103 are driven requires a bottom width. Therefore, the foundation pile 10
Excavation width W only corresponding to the width of just driving two 3
1 would be required. Therefore, there is a problem that the width of the bottom surface 1b of the L-shaped retaining wall 1 is increased and the excavation width W1 is considerably increased.

[0004]

SUMMARY OF THE INVENTION When constructing an L-shaped retaining wall in a road or a residential land development, etc., the excavation width for constructing the L-shaped retaining wall is made as small as possible.

[0005]

[Technical Means] As the first step, the bottom surface 1b of the L-shaped retaining wall 1
After excavating the ground of a considerable width, and as a second step, driving one foundation pile 3 into the bottom of the excavation part, the foundation pile 3 is made up of a horizontal foundation reinforcing bar 4a and a vertical upper reinforcing bar 4b. The rebar 4

In a third step, a foundation concrete for burying the base reinforcing bar 4a is cast, and in a fourth step, while the upper reinforcing bar 4b is inserted into the reinforcing bar insertion hole 1h of the L-shaped retaining wall 1, the L is inserted.
The L-shaped retaining wall 1 is placed and fixed on the foundation concrete 2 and, as a fifth step, the upper reinforcing bar 4b is bent from vertical to horizontal and the cast-in-place concrete 5 is cast so as to bury the upper reinforcing bar 4b. Wall construction method.

[0007]

[Function] Since only one foundation pile 3 is required, the excavation width becomes smaller than before because of the construction of the L-shaped retaining wall. In addition, the basic concrete 2, the cast-in-place concrete 5, the basic reinforcing steel 4a,
Since the upper reinforcing bar 4b is embedded, the stability of the L-shaped retaining wall 1 is also sufficient.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method of the present invention will be described below with reference to the drawings. In the method of the present invention, an L-shaped retaining wall having a smaller width of the bottom surface 1b than that used in the conventional method shown in FIG. 1 is used. Further, the bottom surface 1b is provided with a reinforcing bar insertion hole 1h at the center thereof as shown in FIGS. 4 (a) and 4 (b), or as shown in FIG.
h, 1h.

First step: First, excavation is performed by an amount corresponding to the width of the bottom surface 1b of the L-shaped retaining wall 1. In FIG. 3, W indicates the excavation width in the method of the present invention.

Second step: Next, as shown in FIG. 2, one foundation pile 3 is driven into the bottom of the excavated portion, and
Implant. The reinforcing bar 4 includes a horizontal base reinforcing bar 4a and a vertical upper reinforcing bar 4b.

Third step: Next, as shown in FIG. 2, the foundation concrete 2 is cast, and the foundation reinforcement 4a is embedded in the foundation concrete 2.

Fourth step: Next, as shown in FIG. 3, the L-shaped retaining wall 1 is placed and fixed on the foundation concrete 2 while the upper reinforcing bar 4b is inserted into the reinforcing bar insertion hole 1h.

Fifth step: Next, as shown in FIG. 3, the upper reinforcing bar 4b is bent from vertical to horizontal, and then cast-in-place concrete 5 is cast. The cast-in-place concrete 5 flows into the reinforcing bar insertion hole 1h of the L-shaped retaining wall 1 and is consolidated and integrated with the foundation concrete 2 and the L-shaped retaining wall 1. FIG. 5 shows f5 in FIG.
It is an arrow f5 view. In the method of the present invention, only one foundation pile 3 is required, so that the excavation width is reduced to W compared to the conventional W1.

[0014]

According to the present invention, the foundation rebar 4a is used for the foundation concrete 2.
The upper reinforcing bar 4b is buried in the cast-in-place concrete 5,
Moreover, since the cast-in-place concrete 5 is consolidated and integrated with the foundation concrete 2 and the L-shaped retaining wall 1, the stability of the L-shaped retaining wall can be sufficiently maintained with only one foundation pile.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conventional construction method of an L-shaped retaining wall,

FIG. 2 is a cross-sectional view of first, second, and third steps;

FIG. 3 is a sectional view of fourth and fifth steps,

FIG. 4 (a) L-shaped retaining wall 1 when reinforcing bar insertion hole 1h is at the center
(B) a view taken in the direction of arrows 4b-4b in FIG. 4 (a), (c) a plan view when the rebar insertion holes 1h are similarly arranged on both sides in a semicircle,

FIG. 5 is a view taken in the direction of arrows in FIGS.

[Explanation of symbols]

1: L-shaped retaining wall 1b: Bottom 1h: Reinforcement insertion hole 2: Foundation concrete 3: Foundation pile 4: Reinforcement 4a: Foundation reinforcement 4b: Top reinforcement 5: Cast-in-place concrete 101: L-type retaining wall 101b: Bottom 102: Foundation Concrete 103: Foundation pile 104: Rebar W, W1: Excavation width

Claims (1)

(57) [Claims] 1. An L-shaped retaining wall 1 having a bottom surface 1b provided with a reinforcing bar insertion hole 1h is used. As a first step, a ground having a width equivalent to the width of the bottom surface 1b of the L-shaped retaining wall 1 is excavated. As a process, after one foundation pile 3 is driven into the bottom of the excavation part, a reinforcement 4 composed of a horizontal foundation reinforcement 4a and a vertical upper reinforcement 4b is implanted into the foundation pile 3, and a foundation is formed as a third step. The foundation concrete 2 for burying the reinforcing bar 4a is cast. As a fourth step, the L-shaped retaining wall 1 is placed on the foundation concrete 2 while the upper reinforcing bar 4b is inserted into the reinforcing-bar insertion hole 1h of the L-shaped retaining wall 1. As a fifth step, an L-shaped retaining wall construction method in which the upper reinforcing bar 4b is bent from vertical to horizontal and the cast-in-place concrete 5 is cast so as to bury the upper reinforcing bar 4b.