JPH11350492A - Earth retaining method for excavated ditch side wall face and earth retaining wall material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth retaining method capable of reinforcing the wall face of a ditch from the ground surface simply and safely without requiring a worker to enter the excavated ditch and to provide an earth retaining wall material used for it. SOLUTION: Multiple horizontal reinforcing members 1 arranged at the prescribed intervals are connected by a soft sheet 2 to form a series of sheet-like earth retaining wall materials A. The earth retaining wall materials A and an assembled frame body B in which a pair of right and left vertical columns 3 arranged in parallel are connected by pressure cylinders 4 expandably to the right and left and the junctions between the pressure cylinders 4 and the columns 3 are made rotatable via pivotal shafts 5 are prepared. The earth retaining wall materials A are suspended from above along the right and left wall faces D of an excavated ditch C to cover the wall faces D, then the assembled frame body B is lowered between the right and left earth retaining wall materials A, and the columns 3 are pressed toward the wall faces D by the pressure cylinders 4 for earth retaining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the excavation of a trench for burying water and sewage pipes, power lines, telephone lines, and various other communication cable protection tubes in the ground, and the left and right side walls of the trench collapse. TECHNICAL FIELD The present invention relates to an earth retaining wall material used for preventing an accident to occur, and a method of earth retaining the left and right side wall surfaces of an excavation groove using the earth retaining wall material.

[0002]

2. Description of the Related Art Generally, when water and sewer pipes, power line protection pipes, communication cable protection pipes and the like are laid underground, trenches are excavated in roads and the like, and objects are buried in the trenches. Conventionally, in order to prevent collapse of the side wall of the trench excavated at the time of forming the pipeline, a sheet pile is hit to cover the wall surface, and a vertical and horizontal flutter material is applied to an opposing surface of the sheet pile to form left and right side flap materials. Is pressed by a pressing cylinder to reinforce the wall of the groove.

[0003]

However, in such a conventional means, the number of parts such as sheet piles and fluttering materials is large, so that transportation and storage are troublesome. It is very difficult to assemble and disassemble the members, it takes time and effort, and has a problem to be solved such that it involves danger. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the conventional drawbacks, and to provide a soil retaining method that can easily and safely reinforce the wall of a digging groove from the ground without an operator entering the digging groove. I do. Another main object of the present invention is to provide an earth retaining wall material that can easily and effectively cover the wall surface of an excavation groove.

[0004]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the earth retaining method according to the present invention, a plurality of horizontal reinforcing members 1 arranged at predetermined intervals are connected by a flexible sheet 2 to form an earth retaining wall formed in a series of sheets. The material A and a pair of right and left vertical column members 3, 3 arranged in parallel are connected to each other by a pressing cylinder 4 so as to be able to expand and contract left and right, and a connecting portion between the pressing cylinder 4 and the column members 3, 3 forms a pivot 5. And an assembling frame B rotatably interposed therebetween, and a wall material A for retaining the earth is hung from above along the left and right wall surfaces D, D of the excavated groove C to cover the wall surface. The left and right wall surfaces are reinforced by lowering the attachment frame B between the left and right earth retaining wall materials A, A and pressing the column members 3, 3 toward the wall surfaces by the pressing cylinder 4.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A wall material for retaining according to the present invention comprises a plurality of horizontal reinforcing members 1... It was made into the composition formed in.

The sheet 2 of the retaining wall material A can be formed of a woven fabric, a nonwoven fabric, or a synthetic resin sheet, but it is preferable that the sheet 2 has moderate toughness and excellent waterproofness. The reinforcing member 1 is suitable in that a square or round pipe made of a metal such as aluminum, iron, or stainless steel is lightweight, but may be formed of a material such as wood or reinforced plastic. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on an embodiment shown in the drawings. In the drawings, reference numeral A denotes a retaining wall material according to the present invention, and a plurality of horizontal reinforcing members 1 arranged at predetermined intervals are connected by a flexible sheet 2 to form one sheet. It is formed on a sheet material. The size of the retaining wall material A varies depending on the conditions of the construction site.
mm, and five reinforcing members 1 were arranged in parallel at a pitch of 500 mm. At least on the upper end side of the retaining wall material A, as shown in FIG. 4, there are provided engaging pieces 7 to which a lifting / suspending crane hook is engaged. The engaging piece 7 can be used in an appropriate shape such as a string-shaped material or a band-shaped material formed in a loop shape or a hook-shaped material.

The sheet 2 of the retaining wall material A can be formed of a woven fabric, a nonwoven fabric, or a synthetic resin sheet, but a material having excellent toughness enough to withstand a lateral pressure of 5 tons per square meter and moderate waterproofness. preferable. Reinforcing member 1
Although a square or round pipe made of a lightweight metal such as aluminum or stainless steel is suitable, it can also be made of a material such as wood or reinforced plastic. In the embodiment shown in the figure, a wall material A for earth retaining is formed by laminating two sheet materials, sandwiching a rectangular cylindrical aluminum material therebetween and bonding the two sheet materials.

Reference numeral B denotes an assembling frame used in the earth retaining method of the present invention, wherein a pair of left and right vertical column members 3, 3 arranged in parallel are vertically arranged on a pressing cylinder 4, 4, the connecting portion between the pressing cylinder 4 and the column members 3, 3 is formed rotatably via a pivot 5, so that the left and right column members 3, 3 have four points. It is configured so that it can be folded adjacent to each other like a link. In this embodiment,
The press cylinders 4, 4 are fluid pressure cylinders. Reference numeral 6 denotes a joint port for connecting a fluid pipe (not shown) to the pressing cylinder 4. Needless to say, the pressing cylinders 4 and 4 may be rotary operating cylinders (not shown) having a vertical operating axis for rotating from the ground.

As shown in FIG. 1, the earth retaining method according to the present invention first covers the wall surface by hanging earth retaining wall materials A, A from above along the left and right wall surfaces D, D of the excavated groove C. After that, as shown in FIG. 2, the folded assembly frame B is suspended with a crane or the like and lowered between the left and right earth retaining wall materials A, A, and the pressing cylinders 4, 4 are in a horizontal posture. The lower ends of the pillars 3 and 3 are grounded to the groove bottom so that Next, as shown in FIG. 3, the pressing cylinder 4 is operated to press the column members 3, 3 against the wall surfaces D, D to fix the retaining wall material A to the wall surface. Thus, the earth retaining work can be easily and safely performed from above the groove.

After the desired cable protection tube or the like is laid in the groove, the cylinder 4 is contracted to raise the assembly frame B upward, and then, while the backing is performed in the excavation groove, the mounting frame B is raised. The earth retaining wall material A can be easily disassembled and removed simply by pulling the retaining wall material A upward using the hook engaging pieces 7 for hanging. Needless to say, it will be easily understood that the work of backfilling the excavation trench may be performed after the retaining wall material A is pulled up.

In the above embodiment, the reinforcing member 1 of the retaining wall material A is formed of a square pipe material. However, the reinforcing member 1 may be formed in a hexagon having a vertical slope as shown in FIG. Alternatively, it may be formed as a circular shape as shown in FIG. Thereby, at the time of pulling out the retaining wall material A, the resistance to the backfill soil can be reduced.

Although the representative embodiment of the present invention has been described above, the present invention is not necessarily limited to the structure of the above-described embodiment. For example, both sides of the adjacent retaining wall materials A, A may be used. Arranging the reinforcing members 1 of the adjoining earth retaining wall materials A, A up and down so as to partially overlap the side edge portions of the both, or arbitrarily perform the operation. As a matter of course, the present invention can be implemented by appropriately changing the range within the range that has the above-mentioned constituent requirements and has an effect.

[0014]

As described above, according to the present invention, the left and right earth retaining wall materials are dropped from the ground, the mounting frame and the pressing cylinder are dropped between them, and then the pressing cylinder is operated. By pressing the vertical pillars of the assembly frame against the retaining wall, the worker can easily and safely perform the retaining work from the ground without entering the narrow groove, and also perform the piping work. Subsequent disassembly and removal operations can be easily and quickly performed from the ground, so that the operation time can be reduced and the total cost can be reduced.

[0015] Further, since the plurality of horizontal pillars as a reinforcing member which is a substantial horizontal fluttering material is integrally incorporated into the earth retaining wall material as a constituent member of the sheet material, scattering of the fluttering material is prevented. Prevention and reduction of the number of members necessary for earth retaining construction, and when unnecessary, it can be wound up compactly, which is an advantage that it is convenient for transportation and storage even though it is a wall covering material instead of sheet pile. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first step of an earth retaining method according to the present invention.

FIG. 2 is a sectional view showing a second step of the earth retaining method.

FIG. 3 is a sectional view showing a third step of the earth retaining method.

FIG. 4 is a front view of a retaining wall material according to the present invention.

FIG. 5 is a sectional view showing a part of another embodiment of the retaining wall material according to the present invention.

FIG. 6 is a sectional view showing a part of still another embodiment of a retaining wall material according to the present invention.

[Explanation of symbols]

 A Wall material for retaining wall B Assembly frame C groove D Side wall surface of groove 1 Column material of wall material for retaining 2 Sheet 3 Column material of mounting frame 4 Fluid pressure cylinder 5 Axis

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[Procedure amendment]

[Submission date] August 7, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Added

[Correction contents]

FIG. 5

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Added

[Correction contents]

FIG. 6

Claims (4)

[Claims] A plurality of horizontal reinforcing members (1) arranged at predetermined intervals are connected by a flexible sheet (2) to form a series of sheet-like retaining wall materials (A). ), And a pair of left and right vertical column members (3), (3) arranged in parallel are connected to each other by a pressing cylinder (4) so as to be able to expand and contract left and right, and the pressing cylinder (4) and the column members (3), An assembly frame (B) whose connection part with (3) is rotatable via a pivot (5) is prepared, and along the left and right wall surfaces (D) and (D) of the excavated groove (C). After hanging the retaining wall material (A) from above and covering the wall surface, the assembly frame (B) is lowered between the left and right retaining wall materials (A) and (A). An earth retaining method for an excavation groove side wall surface in which an earth retaining is performed by pressing a column material (3), (3) toward a wall surface with a pressing cylinder (4). 2. The retaining wall material (A) according to claim 1, wherein the retaining wall material (A) is provided with a plurality of hanging engaging pieces (7) on one side along a horizontal direction. How to retain the excavation trench side wall. 3. An earth retaining wall member formed of a series of sheets formed by connecting a plurality of horizontal reinforcing members (1) arranged at predetermined intervals with a flexible sheet (2). 4. The earth retaining wall material according to claim 3, wherein a plurality of hanging engagement pieces are formed on one side along the horizontal direction.