JP2618796B2 - How to build a 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 method for constructing a wall, and more particularly to a method for constructing a concrete wall in an underground building or the like.

[0002]

2. Description of the Related Art Conventionally, for example, when constructing an underground building, an earth retaining wall is provided with a sheet pile or a soil pile, 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, the rebar is placed at a predetermined position to form a building, a formwork is installed, and concrete is poured into the formwork to construct a wall.

[0003]

In such a conventional method of constructing a wall body, since the retaining wall is formed of a simple flat plate, the strength is weak and the retaining wall falls down, which causes inconveniences. To prevent this retaining wall from collapsing, it is necessary to provide a crossbeam and an upset. When concrete is cast, 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]

Means for Solving the Problems In the method for constructing a wall body of the present invention, a plurality of U-shaped steel sheet piles serving as a formwork are press-fitted into the ground to form an earth retaining wall, and a predetermined U-shaped steel sheet pile among the press-fitted U-shaped steel sheet piles is formed. After the H-section steel is pressed into the concave portion of the shape steel sheet pile, the inside ground of the retaining wall is excavated, and then vertical and horizontal reinforcing bars are arranged using a reinforcing bar facing the retaining wall, and facing the retaining wall. You
It is characterized in that an inner dam is installed and concrete is poured.

[0005]

In the above method of constructing the wall body, as a result of the earth retaining wall made of U-shaped steel sheet piles, the U-shaped steel sheet piles become a continuous wall in a substantially U-shape and are stronger than the earth retaining wall made of a normal flat plate. Since it becomes stronger, it is not necessary to provide a cutting beam and a bellows, and further, a U-shaped steel sheet pile and an outer weir plate
And the recessed part will reinforce the concrete wall.
The minimum thickness of the REIT wall can be reduced. Also, U
Since the steel sheet pile is used as the formwork, there is no need to install a formwork separately from the retaining wall. Further, as a result of press-fitting the H-shaped steel into the ground of the concave portion of the predetermined number of U-shaped steel sheet piles, the H-shaped steel becomes a reinforcing material for the concrete wall, and the strength of the concrete wall can be improved. Further, the H-shaped steel can be used so as to also serve as a support pile for a structure, and there is no need to stand a pillar as a support pile for a 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. In the method for constructing a wall body of the present invention, first, a plurality of U-shaped steel sheet piles serving as a retaining wall and a formwork are press-fitted into the ground, and H-shaped steels are press-fitted into the ground of a predetermined number of U-shaped steel sheet piles. To provide. The H-shaped steel can be one or both of a wall reinforcement and a support stake for a structure.

The construction of a pile press-in / draw-out machine A for press-fitting the U-shaped steel sheet pile and the H-shaped steel will be described with reference to FIGS. The pile press-fitting / extracting machine A is configured with a saddle 4 having a clamp 2 for holding a plurality of existing U-shaped steel sheet piles P press-fitted into the ground in the lower part, and in front of the saddle 4, and has U-shaped steel sheet piles P and H. Section steel 1
It has a chuck 3 for pinching and press-fitting 0. On the saddle 4, at least one in the direction parallel to the existing U-shaped steel sheet pile P.
A slide base 5 that can move more than the pitch is installed,
In front of the mast 6 erected on the slide base 5,
A chuck 3 that slides up and down along the guide rail 7 and that sandwiches the press-fit U-shaped sheet pile P or the press-fit H-shaped steel 10 is formed via an elevating mechanism 8.

Here, the structure of the chuck 3 will be described with reference to FIG. The chuck 3 is a U-shaped steel sheet pile P in the vertical direction.
And a chuck body 31 having a hollow body through which any one of the H-shaped steel 10 and the H-shaped steel 10 can be selectively inserted. The chuck body 31 includes a pair of fixed claws 32 projecting away from the inner surface of the chuck body 31 and a movable claw 33 movable by a fluid pressure cylinder device 34 at a position facing the fixed claws 32. Be composed. As shown in the figure, the chuck 3 holds the web 11 of the U-shaped steel sheet pile P between the fixed claw 32 and the movable claw 33, and in the case of the H-shaped steel 10, the pair of fixed claws 3 is used.
The connecting plate portion 13 is arranged between the two side plate portions 12
Is clamped by 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 / extracting machine A is fixed on the existing U-shaped steel sheet pile P row. Then, the press-fit U-shaped steel sheet pile P is sandwiched by the chuck 3, connected to the front end of the existing U-shaped steel sheet pile P and press-fitted into a moving pile. Next, the slide base 5 is advanced to move the chuck 3 by one pitch, and the press-fit U-shaped steel sheet pile P is clamped in the chuck 3 and pressed into the appropriate depth to be adjacent to the U-shaped steel sheet pile P at the front end. To do. After that, the press-fitting of the press-fitting U-shaped steel sheet pile P is once 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 U-shaped sheet pile P is clamped by the clamp 2. Thereafter, the chuck 3 is lowered again, and the press-fit U-shaped 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 self-propelled U-shaped steel sheet pile P is run.

Then, after the U-shaped steel sheet pile P is press-fitted as described above, the H-shaped steel 10 is inserted into the chuck 3 and the H- shaped steel sheet 10 is press-fitted into the recess Pa of the U-shaped steel sheet pile P. in this case,
As shown in FIG. 3B, the H-section steel 10 has a pair of fixed claws 3.
The connecting plate portion 13 of the H-shaped steel 10 is positioned between the two, and one side plate portion 12 is sandwiched between the fixed claw 32 and the movable claw 33.

As described above, in addition to the press-fitting of the H-shaped steel 10 while the press-fitting of the U-shaped steel sheet pile P, the H-shaped steel 10 is press-fitted after the press-fitting of the U-shaped steel sheet pile P is completed and the retaining wall is formed. You can Further, after the H-shaped steel 10 is press-fitted into the concave portion Pa of the U-shaped steel sheet pile Px in FIG. 1, the mast 6 of the pile press-fitting / pulling-out machine A is swung, and the chuck 3 is swiveled 180 degrees to be reversed, and the press-fitting advancing direction is rearward. H-beam 1 in the recess Pa of the U-shaped steel sheet pile Py
You may press fit 0.

[0012] When press-fitting the H-section steel 10 while pressing the U-shaped steel sheet pile P, As you pressed the H-shaped steel 10 in front of the U-shaped steel sheet piles P of the press advancing direction, the U-shaped steel sheet piles P later The H-shaped steel 10 becomes an obstacle when holding the. Therefore, as described above, the concave portion P of the U-shaped steel sheet pile Py at the rear in the press-fitting traveling direction.
If the H-section steel 10 is press-fitted into a, this problem is eliminated.

As described above, the U-shaped steel sheet pile P and the H-shaped steel 10 are press-fitted to form the connecting wall, and then the ground is excavated. When this excavation is completed, next, as shown in FIG. 4, the reinforcing bars 41 and the horizontal bars 42 are arranged at predetermined positions in a reinforced concrete construction, so-called bar arrangement is performed, and an inner dam B is provided.
The weir board B and the U-shaped sheet pile P are used as a formwork, and the concrete 43 is poured into the formwork. in this case,
The H-shaped steel 10 serves as a reinforcing material for the concrete wall, and also serves as a supporting member for the structure, if necessary. When it is used as a support for a structure, it is pressed deeper than when it is used as a wall reinforcing material. In addition, you may make it arrange | position a reinforcement inside the U-shaped steel sheet pile P in which the H-shaped steel 10 is not arrange | positioned. Further, a reinforcing bar may be arranged inside the U-shaped steel sheet pile P on which the H-shaped steel 10 is arranged so as to surround the H-shaped steel.

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, as a result of the earth retaining wall made of the U-shaped steel sheet pile P, the U-shaped steel sheet pile P becomes a continuous U-shaped wall in succession, which is stronger than the earth retaining wall made of a normal flat plate, etc. And there is no need to provide abdomen. Moreover, the U-shaped steel sheet pile forming the outer dam and its recess are
Minimum thickness of concrete wall as reinforcement for cleat wall
The thickness can be reduced. When the U-shaped steel sheet pile P is used as a formwork, it is not necessary to install a formwork separately from the retaining wall. Further, the H-shaped steel 10 serves as a reinforcing material for the concrete wall, and can improve the strength of the concrete wall. 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 for constructing a wall of the present invention, the strength of the wall can be improved, and no troublesome labor is required.
The construction period and construction cost can be reduced.

[Brief description of the 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 sectional view showing a configuration of a chuck of the pile press-in / draw-out 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 B Weir board P U-shaped steel sheet pile 3 Chuck 10 H-shaped steel 41 Reinforcing steel 42 Reinforcing steel 43 Concrete

Claims (1)

(57) [Claims] 1. A plurality of U-shaped steel sheet piles serving as a formwork are pressed into the ground to form an earth retaining wall, and an H-shaped steel is pressed into a recess of a predetermined number of U-shaped steel sheet piles among the pressed-in U-shaped steel sheet piles. The inner ground of the retaining wall is excavated, and then the reinforcing bar is used to arrange the vertical and horizontal bars facing the retaining wall, and
A method of constructing a wall body in which concrete is cast by providing an internal weir plate facing the wall.