JP2979112B2 - Pile construction method under obstacles - 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 of constructing a pile under an obstacle by pressing a pile made of steel sheet pile such as a sheet pile under an obstacle such as a pipe.

[0002]

2. Description of the Related Art As a countermeasure against liquefaction in the event of an earthquake on the foundation ground of an existing above-ground tank, there is a ring sheet pile method. This ring sheet pile construction method is to strike a pile of steel sheet piles such as sheet piles continuously in a circular shape, and to control the movement of internal soil water by using the tensile resistance of the piles as a deadline inside. This is a method of preventing sinking and deformation of objects.

[0003] In the case of the pile construction method in which piles made of steel sheet piles such as sheet piles are continuously inserted by press-fitting such as the soil liquefaction countermeasure construction method using such steel sheet pile rings, there are obstacles such as pipes. For parts where driving of steel sheet piles is not permissible, conventionally, obstacles such as pipes were removed once, and after pile construction, the obstacles were restored, or the obstacles were dug deep beneath the construction obstacles, and the height was low. Set the static steel sheet pile driving machine, and cut the short cut steel pile (the length is obtained by subtracting the excavation depth just below the obstacle and the extra height determined from the driving machine), and add the predetermined width, The method of repeating until the depth reaches is adopted.

[0004]

However, removing and reattaching the obstacle itself takes a lot of trouble and time. Further, depending on the contents of the obstacle, the operation of the plant may be stopped, and in some cases, it is impossible to remove the obstacle.

[0005] Further, as described above, in the method of digging deeply in the vicinity of the structure and constructing it with a small construction machine, the effect caused by digging deeply cannot be ignored depending on the type of the structure. Furthermore, while adding short and small steel sheet piles,
In addition, engaging the joints with the joining claws (sections) requires a high degree of construction accuracy and also requires a great deal of time and man-hours.

SUMMARY OF THE INVENTION An object of the present invention is to solve the disadvantages of the prior art and to easily drive a pile such as a steel sheet pile without removing obstacles such as pipes and without shortening the pile. Another object of the present invention is to provide a pile construction method under obstacles that can be constructed quickly.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly provides a pile construction method for press-fitting a pile such as a steel sheet pile under an obstacle such as a pipe. Pile such as steel sheet pile, dodging obstacles, and press-fitting obliquely with a construction machine to raise the lower end of the pile vertically at the fulcrum.
In addition, the cause is to hold the protrusion of the pile above the ground and pull or push in the vertical direction. Third, the cause is to slidably provide a high-pressure water injection nozzle along the joint part of the pile, and the high-pressure water from the nozzle is provided. The gist is to perform while cutting the ground.

[0008]

According to the first aspect of the present invention, a pile such as a steel sheet pile is press-fitted obliquely while avoiding an obstacle such as a pipe.
By raising the lower end of the pile vertically at the fulcrum, the pile can be driven vertically just below the obstacle without moving the obstacle and without reducing the length of the pile.

According to the second aspect of the present invention, in addition to the above-described operation, the operation of causing the operation can be easily performed from the ground, and according to the third aspect of the present invention, the ground resistance is large. Even in the case where it cannot be pulled or pushed completely, the ground can be loosened with high-pressure water to reduce the resistance.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of a method of pile construction under obstacles according to the present invention, FIG. 2 is a view taken along line AA of FIG. 1, FIG. 3 is a view taken along line BB of FIG. FIG. 4 is a view taken along line CC in FIG.

The situation of the pile construction method will be described with reference to FIGS. 5 and 6. In FIG.
2b is a pile such as a steel sheet pile made of a sheet pile or the like. When the piles 2a and 2b are continuously connected as a steel sheet pile ring, the steel sheet pile ring becomes a defective portion where the obstacle 1 exists. The stake 2b is set in this missing portion, and the shape may be flat, unlike the stake 2a,
These piles 2a and 2b form a joint 3 at the side end by a joining claw (section).

As shown in FIG. 2, a pile machine is provided under the obstacle 1 by using a slanting driving machine 6 in which a leader mast 5 for vertically moving a press-fit chuck 4 for gripping the pile 2b is provided. 2b is press-fitted obliquely over the obstacle 1. It is also possible to dig a little with cloth digging.

The lower end of the stake 2b is caused to be vertical with respect to the fulcrum. As a method for causing the lower end, a wire 8 having a chuck 7 attached to the tip as shown in FIG. A method in which the ground protruding portion of the pile 2b is held at 7 and the wire 8 is pulled vertically by a winch or other hoisting machine, or a method in which the wire 8 is vertically pushed by a boom having a chuck at the tip of a heavy machine can be adopted.

A high-pressure water jet nozzle 10 having a joint 9 slidably engaged with the joint 3 of the pile 2b is provided.
The pile 2b is slidably provided at the side end of the pile 2b so as to raise the pile 2b while cutting the ground with high-pressure water from the nozzle 10. In the figure, reference numeral 11 denotes a water supply pipe to the nozzle 10.

In this manner, even when the ground resistance cannot be pulled or pushed completely, the ground can be loosened by the high-pressure water from the nozzle 10 and the resistance to the pile 2b can be reduced.

[0016]

As described above, the pile construction method under an obstacle according to the present invention removes an obstacle such as a pipe when continuously inserting a pile such as a steel sheet pile under an obstacle such as a pipe. The construction can be performed easily and quickly without making the pile and shortening the pile.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a method of pile construction under an obstacle according to the present invention.

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 is a view taken along line CC of FIG. 1;

FIG. 5 is a front view showing a construction example of a steel sheet pile ring.

FIG. 6 is a plan view showing a construction example of a steel sheet pile ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Obstruction 2a, 2b ... Pile 3 ... Joint 4 ... Chuck 5 ... Leader mast 6 ... Placing machine 7 ... Chuck 8 ... Wire 9 ... Joint 10 ... Nozzle 11 ... Water pipe

Claims (3)

(57) [Claims] 1. A pile construction method for press-fitting a pile such as a steel sheet pile under an obstacle such as a pipe. In a pile construction method, a pile machine such as a steel sheet pile is pressed obliquely from an oblique direction by a driving machine capable of oblique driving. And
A pile construction method under an obstacle, characterized in that the lower end of the pile is raised vertically to a fulcrum. 2. The raising means includes a protrusion on the ground of the pile,
The method according to claim 1, wherein the pile is pulled or pushed vertically. Wherein causing the slidable high pressure water injection nozzles along the joint portion of the pile, according to claim 1 or claim 2 carried out while cutting the soil at high pressure water from the nozzle
Pile construction method under obstacles as described.