JPH05311658A - Driving method for steel sheet pile - Google Patents

Abstract

PURPOSE:To efficiently drive a steel sheet pile by inserting wires into sections of joints formed at the right and left end sections in the longitudinal direction of the steel pile, then pressing the steel sheet pile into the ground. CONSTITUTION:Wires 2 are inserted into sections 3 of joints 4 formed at the right and left end sections in the longitudinal direction of a steel sheet pile 1, then the steel sheet pile 1 is drive into the ground. The wires 2 are extracted upward, and the interiors of the sections 3 are cleaned to remove the stuck sand. When the next steel sheet pile 1 is to be drive adjacently to the existing steel sheet pile 1, the wire 2 is inserted into the joint 4 on the opposite side to the joint 4 inserted with the wire 2, and the steel sheet pile 1 is drive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a steel sheet pile, and more particularly to an efficient method for driving a steel sheet pile against a sand layer.

[0002]

2. Description of the Related Art In the conventional sheet pile wall construction method, steel sheet piles are continuously driven while intermeshing with each other to form a permanent or temporary wall and resist a lateral force to form a retaining wall or a water stop wall. That is the purpose, and usually, steel sheet piles were placed by the following method.

That is, the driving work has been carried out by an impact driving method using a hammer, a vibration driving method which applies vertical vibration by a vibro hammer or the like, and a static driving method using auger excavation.

Each of these construction methods has advantages and disadvantages.
An appropriate construction method was selected and carried out in consideration of various conditions such as the size and shape of the steel sheet pile, the ground conditions, the generated noise, the magnitude of vibration, and the working environment.

[0005]

However, for example, in a vacant lot in an area where a plurality of apartments are built, the site where steel sheet piles are to be laid is small, and from the viewpoint of preventing noise generation, the above-mentioned static The most suitable method is to use the dynamic driving method, but there are cases where the auger excavator cannot be installed because the installation area is not secured. Moreover, in such a place, the jet method using a large amount of water is not suitable.

On the other hand, in such a case, it is possible to adopt a method of driving a steel sheet pile by vertically vibrating the vibrating body using a vibro hammer or the like, but the following problems have been pointed out.

When the ground 5 is a sand layer, as shown in FIG. 3, a large amount of it is present in the joint 4 at the end of the U-shaped steel sheet pile 1, that is, in the section 3 of the symmetrical groove-shaped edge. The sand gets in, and as a result, the resistance of the section 3 increases and a large force is required for placing. As a result, there is a drawback that the work efficiency is very poor.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method capable of efficiently driving a steel sheet pile even on the ground of a sand layer.

[0009]

The present invention has the following structure in order to achieve the above object. That is, for the steel sheet pile 1 in which the joints 4 are formed at the left and right ends in the longitudinal direction, the step of inserting the wire 2 into the section 3 of the joint 4, and the steel sheet pile 1 in which the wire 2 is inserted into the ground. It comprises a step of press-fitting and a step of pulling out the wire 2 from the section 3 of the steel sheet pile 1 press-fitted into the ground.

Further, after the wire 2 is pulled out after the steel sheet pile 1 has been cast, the inside of the section 3 is cleaned if necessary, and the attached sand is discharged. The steel sheet pile 1 used here is generally U-shaped, but as long as the section 3 is formed, it can be applied to other Z-shaped or linear shapes.

Further, similar effects can be expected not only in the vibration type construction method but also in the hydraulic pushing method, hammer driving method and the like.

[0012]

In the method of the present invention, the wire 2 is present in the section 3 of the steel sheet pile 1 and the steel sheet pile 1 is press-fitted into the ground in a state where this space is closed. Sand does not get into section 3. Therefore, the resistance during driving does not increase.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a plan view when a steel sheet pile is driven by the method of the present invention, and FIG. 2 is a side view thereof. The U-shaped steel sheet pile 1 is driven into the ground 5 continuously by being meshed with each other by joints 4 provided at both ends thereof. The joint 4 is formed at the longitudinal edges of the left and right symmetrical groove shapes, and the section 3 is provided inside thereof.

In order to carry out the method of the present invention, first, in a state before driving, a wire 2 having a predetermined length is passed through a section 3 of a steel sheet pile 1. The wire 2 has a diameter that fills the space of the section 3 and is held in the section 3.

Next, this is placed by the vibro hammer method. In this, the upper end of the steel sheet pile 1 is supported by a vibrating body 6, and the vertical vibration of the vibrating body 6 is transmitted to the steel sheet pile 1 and driven into the ground.

After that, the next steel sheet pile 1 is continuously cast, but the joint 4 of the adjacent steel sheet pile 1 which has already been cast and the joint 4 of the steel sheet pile to be cast are joined. The wire 2 is inserted through the joint 4 on the opposite side of the joint 4.

After the casting, the wire 2 is pulled out upward, and the inside of the section 3 through which the wire 2 is inserted is cleaned,
Remove the attached sand. Then, the joint 4 of the next steel sheet pile 1 is fitted into the section 3 and the above-described work is repeated.

With this arrangement, the wire 2 is inserted into the section 3 of the steel sheet pile 1 and the steel sheet pile is press-fitted into the ground in a state where this space is closed. Therefore, the sand does not enter the section 3 even when the sand layer is cast.
Therefore, the resistance due to sand does not increase, and the steel sheet pile can be press-fitted smoothly.

[0019]

As described above, according to the present invention, even when a steel sheet pile is cast on a sand layer in a narrow site, a method suitable for the surrounding environment can be selected without installing large equipment, and the efficiency can be improved. There is an effect that a concrete placement work can be carried out.

[Brief description of drawings]

FIG. 1 is a plan view of driving a steel sheet pile by the method of the present invention.

[Figure 2] Side view

FIG. 3 is a plan view showing a conventional driving condition 1 steel sheet pile 2 wire 3 section 4 joint

Claims (1)

[Claims] 1. A step for inserting a wire (2) into a section (3) of a joint (4) of a steel sheet pile (1) having joints formed on the left and right ends in the longitudinal direction, the wire (2). ) Is inserted through the steel sheet pile (1) into the ground, and the wire (2) is pulled out from the section (3) of the steel sheet pile (1) pressed into the ground. A method for placing a steel sheet pile, characterized by: