JPH07197478A - Method for constructing l-shaped retaining wall - Google Patents

Abstract

PURPOSE:To lessen the width of excavation for constructing a L-shaped retaining wall as much as possible, during the construction of the L-shaped retaining wall in road works, housing land development works, and so on. CONSTITUTION:As the first process, the earth enough to correspond to the width of the bottom 1b of a L-shaped retaining wall 1 is excavated, and as the second process, one foundation pile 3 is driven into the bottom of an excavated part, following which reinforcing bars 4 consisting of footing reinforcements 4a in horizontal shape and upper reinforcements 4b in a vertical state are planted in the foundation pile 3. As the third process, footing concrete is placed, in which the footing reinforcements 4a are embeded, and as the fourth process, the upper reinforcements 4b are passed through a reinforcement-throug hole 1h on the L-shaped retaining wall 1, following which the L-shaped retaining wall 1 is placed and fixed on the footing concrete. As the fifth process, the upper reinforcements 4b in the vertical state are horizontally bent, and cast-in- place concrete 5 is placed so that the upper reinforcements 4b are embeded therein.

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 When a conventional L-shaped retaining wall is used for roads, residential land construction, etc., as shown in FIG. Drive at least two piles 103. Next, after the reinforcing bars 104 are planted in the foundation pile 103, the foundation concrete 102 is placed.

Finally, the L-shaped retaining wall 101 is placed and fixed on the foundation concrete 102. By the way, in such a conventional construction method, the bottom width is required for the L-shaped retaining wall 101 in which only two foundation piles 103 are driven. Therefore, the foundation pile 10
Excavation width W corresponding to the width for driving 2 3
1 will be required. Therefore, there remains a problem that the width of the bottom surface 1b of the L-shaped retaining wall 1 becomes large and the excavation width W1 becomes considerably large.

[0004]

When constructing an L-shaped retaining wall on a road or a residential land construction work, the excavation width for constructing the L-shaped retaining wall should be made as small as possible.

[0005]

[Technical Means] As a first step, the bottom surface 1b of the L-shaped retaining wall 1
After excavating the ground of a considerable width and driving one foundation pile 3 into the bottom surface of the excavated portion in the second step, the foundation pile 3 is divided into a horizontal foundation rebar 4a and a vertical upper rebar 4b. Implant the rebar 4

In the third step, the basic concrete 3 for embedding the basic reinforcing bar 4a is placed, and in the fourth step, the upper reinforcing bar 4b is inserted into the reinforcing bar insertion hole 1h of the L-shaped retaining wall 1 while the upper reinforcing bar 4b is inserted.
The L shape retaining wall is constructed by fixing the shape retaining wall 1 on the foundation concrete 3 and, as a fifth step, bending the upper reinforcing bar 4b from vertical to horizontal and placing the cast-in-place concrete 5 so as to bury the upper reinforcing bar 4b. Wall construction method.

[0007]

[Operation] Since only one foundation pile 3 is required, the excavation width is smaller than before due to the L-shaped retaining wall construction. In addition, the basic concrete 3, the cast-in-place concrete 5, the basic rebar 4a,
Since the upper rebar 4b is embedded, the stability of the L-shaped retaining wall 1 is sufficient.

[0008]

Embodiments of the method of the present invention will be described below with reference to the drawings. In the method of the present invention, as the L-shaped retaining wall 1, one having a width of the bottom surface 1b smaller than that used in the conventional method shown in FIG. 1 is used. Further, as shown in FIG. 4 (a) and (c), the bottom surface 1b has one rebar insertion hole 1h at the center thereof, or
It has semicircular rebar insertion holes 1h, 1h on both sides.

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 then the reinforcing bar 4 is attached to the foundation pile 3.
Plant. The reinforcing bar 4 is composed of a horizontal basic reinforcing bar 4a and a vertical upper reinforcing bar 4b.

Third step: Next, as shown in FIG. 2, the foundation concrete 3 is poured and the foundation rebar 4a is embedded in the foundation concrete 3.

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

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

[0014]

[Effects of the Invention] The foundation rebar 4a becomes the foundation concrete 2,
The upper rebar 4b is embedded in the cast-in-place concrete 5,
Moreover, since the cast-in-place concrete 5 is solidified and integrated with the basic 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 drawings]

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

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

FIG. 3 is a sectional view of steps 4 and 5,

FIG. 4 (a) L when the reinforcing bar insertion hole 1h is in the center
4B is a plan view of the shape retaining wall 1, FIG. 4B is a view taken along the arrow 3b-3b of FIG. 4A, and FIG.

FIG. 5 is an arrow view of FIG. 3f4-f4;

[Explanation of symbols]

1, 101: L-shaped retaining wall, 1h: Reinforcing bar insertion hole, 2, 20
2: Foundation concrete, 3,103: Foundation pile, 4,10
4: Reinforcing bar, 4a: Basic reinforcing bar, 4b: Upper reinforcing bar, 5: Cast-in-place concrete, W: Excavation width of the present invention, W1: Excavation width of conventional technology.

Claims (1)

[Claims] 1. An L-shaped retaining wall 1 having a bottom surface 1b provided with a reinforcing bar insertion hole 1b is used. As a first step, a ground having a width corresponding to the bottom surface 1b of the L-shaped retaining wall 1 is excavated, and As a process, after driving one foundation pile 3 on the bottom surface of the excavated portion, a reinforcing bar 4 including a horizontal foundation reinforcing bar 4a and a vertical upper reinforcing bar 4b is implanted in the foundation pile 3, and a foundation is formed as a third step. The basic concrete 3 for burying the reinforcing bars 4a is placed, and as the fourth step, the L-shaped retaining wall 1 is placed on the basic concrete 3 while inserting the upper reinforcing bars 4b into the reinforcing bar insertion holes 1h of the L-shaped retaining wall 1. A method of constructing an L-shaped retaining wall in which, as a fifth step, the upper reinforcing bars 4b are fixed, and the upper reinforcing bars 4b are bent horizontally from the vertical direction and the cast-in-place concrete 5 is placed so as to embed the upper reinforcing bars 4b.