JPH06228945A - Construction of wall - Google Patents

Abstract

PURPOSE:To increase the strength, to shorten the time required for work completion and to reduce cost by a method wherein a retaining wall is constructed by putting steel sheet-piles serving as a form into the ground by pressure driving while putting with pressure H-steels into dented parts of the steel sheet-piles in specified numbers, and excavation is made thereafter to the ground inside the retaining wall. CONSTITUTION:A plurality of steel sheet-piles P for forming a retaining wall are put into the ground by pressure driving, and H-steels 10 are put with pressure into dented parts of the steel sheet-piles P in specified numbers, and thereby a continuous wall is provided. Then, the ground is excavated and reinforcements 41, 42 are arranged concrete 43 is placed with the steel sheet-piles P made serve as a form. Thereby, strength of the wall body can be heightened while the term of works is shortened and cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a wall body, and more particularly to a method for constructing a concrete wall body in an underground structure or the like.

[0002]

2. Description of the Related Art Conventionally, for example, when constructing an underground structure, a soil retaining wall is provided with sheet piles or soil piles, and then the ground is excavated to form an underground hole. When this excavation is to be carried out, a girder and abdomen will be installed to prevent the retaining wall from falling. When the excavation is completed, a reinforcing bar is placed at a predetermined position for building a structure, a form is installed, and concrete is poured into the form to construct a wall.

[0003]

In such a conventional method of constructing a wall body, since the earth retaining wall is simply a flat plate, the strength is weak and the earth retaining wall falls over. To prevent this retaining wall from collapsing, it is necessary to provide a crossbeam and an upset. When placing concrete, it is necessary to install the formwork separately from the retaining wall. As a result, there has been a problem that it takes a lot of trouble to increase the construction period and the construction cost. The present invention has been made in view of the conventional circumstances as described above, and an object thereof is to provide a method for constructing a wall body that is strong in strength and can reduce the construction period and the construction cost.

[0004]

According to the method for constructing a wall of the present invention, a plurality of steel sheet piles to be a formwork are press-fitted into the ground to form a retaining wall, and a predetermined number of the press-fitted steel sheet piles are used. After H-shaped steel was press-fitted into the recesses of the steel sheet pile, the inner ground of the earth retaining wall was excavated, and then concrete was placed in the formwork.

[0005]

In the above method of constructing the wall body, the steel retaining sheet is used to construct the retaining wall, and as a result, the steel retaining sheet becomes a substantially U-shaped continuous wall, which is stronger than the retaining wall made of a normal flat plate. Therefore, it is not necessary to provide a cross beam and an upset, and the thickness of the wall itself can be reduced. Further, since the steel sheet pile is used as the form, it is not necessary to install the form separately from the retaining wall. Further, as a result of press-fitting the H-section steel into the ground of the recesses of the predetermined number of steel sheet piles, the H-section steel serves as a reinforcing material for the concrete wall body and can improve the strength of the concrete wall body. Further, the H-section steel can be used so as to also serve as a support pile for a structure, and it is not necessary to stand a column as a support for the structure separately.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for constructing a wall body of the present invention will be described with reference to the accompanying drawings. According to the method for constructing a wall of the present invention, first, a plurality of steel retaining sheets and steel sheet piles to be a formwork are press-fitted into the ground, and H-shaped steel is press-fitted into the ground of the recesses of a predetermined number of steel sheet piles to provide a connecting wall. The H-section steel can be either one of the wall reinforcement and the support pile for the structure, or both.

The construction of the pile press-fitting / pulling-out machine A for press-fitting the steel sheet pile and the H-shaped steel will be described with reference to FIGS. The pile press-fitting / extracting machine A includes a saddle 4 having a clamp 2 at a lower portion for sandwiching a plurality of existing steel sheet piles P press-fitted into the ground, and the saddle 4
Of the steel sheet pile P and the H-shaped steel 10 are sandwiched and press-fitted. A slide base 5 is mounted on the saddle 4 so as to be movable in a direction parallel to the existing steel sheet piles P by at least one pitch, and a guide rail 7 is provided in front of a mast 6 standing on the slide base 5. Slide vertically along and press fit steel sheet pile P or press fit H
A chuck 3 for sandwiching the shaped steel 10 is formed via an elevating mechanism 8.

The structure of the chuck 3 will be described with reference to FIG. The chuck 3 has steel sheet piles P and H in the vertical direction.
The chuck body 31 has a hollow body that can selectively insert any one of the shape steel 10. This chuck body 31
The pair of fixed claws 32 protrude from the inner surface of the chuck body 31 so as to be spaced apart from each other, and the movable claw 33 movable to the position facing the fixed claw 32 by the fluid pressure cylinder device 34. The chuck 3 holds the web 11 of the steel sheet pile P between the fixed claw 32 and the movable claw 33 as shown in the figure. In the case of the H-shaped steel 10, the connecting plate portion 13 is arranged between the pair of fixed claws 32. The one side plate 12 is sandwiched between the fixed claw 32 and the movable claw 33.

A method for constructing a wall body by the pile press-fitting / pulling machine A will be described. First, the pile press-fitting / pulling machine A is fixed on the existing steel sheet pile P row. Then, the press-fitted steel sheet pile P is sandwiched by the chuck 3 and connected to the front end of the existing steel sheet pile P by press fitting to form a moving pile. Next, the slide base 5 is moved forward to move the chuck 3 by one pitch, and the press-fitting steel sheet pile P is sandwiched between the chucks 3 and adjacent to the steel sheet pile P at the front end and press-fitted to a proper depth. After that, the press-fitting of the press-fitting steel sheet pile P is temporarily stopped, the clamped state of the clamp 2 is released, and the saddle 4 is appropriately raised in height and advanced by one pitch of the pile. Next, the saddle 4 is lowered and the existing steel sheet pile P is clamped by the clamp 2. After that, the chuck 3 is lowered again, and the press-fitting steel sheet pile P is completely press-fitted. By repeating this work, the pile press-in / pull-out machine A can be sequentially press-fitted while the pile press-fitting / extracting machine A is self-propelled on the existing steel sheet pile P.

After the steel sheet pile P is press-fitted as described above, the H-section steel 10 is then inserted into the chuck 3 and the H-section steel 10 is press-fitted into the recess Pa of the steel sheet pile P. In this case, H-shaped steel 1
As shown in FIG. 3 (B), 0 indicates that the connecting plate portion 13 of the H-shaped steel 10 is positioned between the pair of fixing claws 32, and one side plate portion 1
2 is sandwiched between the fixed claw 32 and the movable claw 33.

As described above, in addition to press-fitting the H-shaped steel 10 while press-fitting the steel sheet pile P, the H-shaped steel 10 may be press-fitted after the press-fitting of the steel sheet pile P is completed and the earth retaining wall is created. . Further, after the H-shaped steel 10 is press-fitted into the recess Pa of the steel sheet pile Px in FIG. 1, the mast 6 of the pile press-fitting / extracting machine A is swung,
The H-shaped steel 10 may be press-fitted into the recess Pa of the steel sheet pile Py at the rear of the press-fitting advancing direction by turning the chuck 3 180 degrees and inverting it.

When the H-section steel 10 is press-fitted while the steel sheet pile P is being press-fitted, when the H-section steel 10 is press-fitted into the steel sheet pile P in the forward direction of the press-fitting progress, when the rust sheet pile P is clamped later, H The shape steel 10 becomes an obstacle. Therefore, as described above, if the H-shaped steel 10 is press-fitted into the recessed portion Pa of the steel lost plate Py behind the press-fitting traveling direction, this problem will be eliminated.

As described above, the steel sheet pile P and H type steel 10
After press-fitting and installing a connecting wall, the ground is excavated. When this excavation is completed, next, as shown in FIG. 4, the vertical reinforcement 41 and the horizontal reinforcement 42 are arranged at predetermined positions in the reinforced concrete construction, so-called reinforcement is performed, and the steel sheet pile P is used as a formwork. The concrete 43 is placed on the frame.
In this case, the H-shaped steel 10 serves as a reinforcing material for the concrete wall, and also serves as a support pile for the structure, if necessary. When using it as a support pile for a structure, press it deeper than when using it as a wall reinforcement. In addition, H
You may make it arrange | position a reinforcement inside the steel sheet pile P which does not arrange | position the shape steel 10. Moreover, you may make it arrange | position the inside of the steel sheet pile P which has arrange | positioned the H-section steel 10 with a poop reinforcement etc. so that H-section steel may be surrounded.

The method of constructing the wall as described above has the following advantages. Conventionally, it was necessary to provide a cutting beam and abdomen to prevent the retaining wall from falling.
In this embodiment, the steel retaining sheet P is used as the retaining wall, and as a result, the steel retaining sheet P becomes a substantially U-shaped wall in succession, which is stronger than the retaining retaining wall made of an ordinary flat plate or the like. There is no need to provide a wake up. Moreover, the thickness of the wall itself can be reduced. Further, when the steel sheet pile P is used as a form, it is not necessary to install the form separately from the retaining wall. Further, the H-shaped steel 10 serves as a reinforcing material for the concrete wall body and can improve the strength of the concrete wall body. Further, the H-shaped steel 10 can be used also as a support pile for a structural body, and it is not necessary to separately erect a column as a support pile for a structural body.

[0015]

According to the method of constructing a wall body of the present invention, the strength of the wall body can be improved and no troublesome labor is required.
The construction period and construction cost can be shortened.

[Brief description of drawings]

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

FIG. 2 is a front view of a pile press-fitting / pulling machine used when implementing the present invention.

FIG. 3 is a cross-sectional view showing a configuration of a chuck of the pile press-fitting / pulling machine.

FIG. 4 is a schematic plan view showing a structure of a wall body.

[Explanation of symbols]

 A Pile press-in / pull-out machine P Steel sheet pile 3 Chuck 10 H-shaped steel 41 Reinforcing bar 42 Reinforcing bar 43 Concrete

Claims (1)

[Claims] 1. A plurality of steel sheet piles to be a formwork are press-fitted into the ground to form a retaining wall, and H-shaped steel is press-fitted into recesses of a predetermined number of the steel sheet piles of the press-fitting steel sheet piles. A method for constructing a wall body in which the inner ground is excavated, and then concrete is placed in the formwork.