JPH1037180A - Construction method of continuous underground wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of the construction work by lapping following piles between preceding piles constructed at an interval for construction and carrying out a hole drilling process at the time by removing an underground obstacle by using a hole drilling machine having a rock drilling function. SOLUTION: A casing 2 is mounted on a hole drilling machine 1 externally to drill holes over the whole length in the horizontal direction of a continuous underground wall across a predetermined interval. At this time, the hole drilling machine 1 having a rock drilling function is used to crush and remove an underground obstacle such as rock. Next, the hole drilling machine 1 is pulled up, a steel pipe 3 is built in a remaining casing, and then the casing 2 is pulled out while filling solidifying material 4 such as cement milk in holes digged in the inside and outside of the steel pipe 3 to construct a group of preceding piles. Then, a following pile is constructed by lapping with adjacent preceding piles on both sides between the group of preceding piles in the same process to construct the underground wall like a row of continuous columns. Moreover, an underground wall like a row of many step type continuous columns is constructed as required. Consequently, it is possible to remove an underground obstacle and construct the continuous underground wall simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for constructing a continuous underground wall.

[0002]

As a conventional method of constructing a continuous underground wall, there is a construction method called an SMW construction method. However, this construction method employs an underground obstacle (such as a concrete block or a stone block). Poor adaptability to). Therefore, there is a need for a method that can simultaneously remove an underground obstacle and construct a continuous underground wall.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to construct a continuous underground wall capable of simultaneously removing an underground obstacle and constructing a continuous underground wall. The aim is to provide a method.

[0004]

As a means for solving the above-mentioned problems, the present invention provides a step of drilling holes at predetermined intervals by a drilling machine equipped with a casing, and the steps of: Construction of the leading pile by the process of erecting the steel pipe in the casing after raising the drilling machine while leaving it, the process of extracting the casing while filling the drilling hole with the solidified material, and the process of solidifying the solidified material Then, between the preceding piles, by wrapping with the preceding piles on both sides and repeating the above process to construct the succeeding piles, a continuous pillar-column-shaped underground wall was constructed, Provide a method of constructing the inner wall.

[0005] Further, the drilling machine having a rock drilling function such as a hydraulic hammer drill is used to remove underground obstacles and construct a continuous underground wall at the same time. A method for constructing a continuous underground wall is provided. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

<A> Drilling The drilling is performed by mounting the casing 2 on a drilling machine 1 such as a screw auger. The casing 2 has a length substantially equal to the length of the hole. Drilling is performed at predetermined intervals over the entire horizontal length of the continuous underground wall. By drilling the exterior of the casing 2 in this way, the collapse of the hole wall can be prevented, and the drilling operation can be performed quickly and easily.

If a drilling machine 1 having a rock drilling function such as a low-noise, low-vibration hydraulic hammer drill is used as the drilling machine 1, an underground obstacle (such as a concrete block or a stone block) is crushed and removed. A continuous underground wall can be constructed.

<B> Installation of steel pipe After drilling the drilling machine 1 while leaving the casing 2, the casing
A steel pipe 3 having a small hole diameter and an extremely thick diameter is built in the thing 2. The steel pipe 3 has a length substantially equal to the drilled hole and the casing 2
Use an outer diameter smaller than the inner diameter.

<C> Filling of the solidified material After the steel pipes 3 are built in the respective casings 2, the solidified material 4 such as cement milk is filled into the entire inside and outside of the drilled holes of the steel pipes 3. Pull out. The solidification material 4 is similarly filled in other drilled holes and solidified to construct a group of preceding piles 5 as shown in FIG.

<D> Construction of trailing stake After the group of leading stakes 5 has been constructed, as shown in FIG.
Between the groups, a trailing pile 6 is constructed by wrapping the leading pile 5 on both sides. The construction of the trailing pile 6 is performed in the same manner as the construction step of the preceding pile 5 described above. Then, as shown in FIG. 2, by continuously constructing the leading pile 5 and the trailing pile 6, it is possible to construct a continuous pillar-shaped underground wall. Also, a multi-stage continuous column-shaped underground wall as shown in FIG. 3 can be constructed.

[0011]

As described above, according to the present invention, by using a drilling machine having a rock drilling function such as a hydraulic hammer drill, the removal of underground obstacles and the construction of a continuous underground wall can be achieved. Since they can be performed at the same time, the construction efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a construction procedure of the present invention.

FIG. 2 is a plan view showing a completed underground wall according to the present invention;

FIG. 3 is a plan view showing a completed underground wall according to the present invention;

Claims (2)

[Claims] 1. A step of drilling holes at predetermined intervals by a drilling machine with a casing, and after elevating the drilling machine while leaving the casing, a steel pipe is built in the casing. After constructing the leading pile by the process, the step of extracting the casing while filling the drilling with the solidified material, and the step of solidifying the solidified material, wrap the preceding piles on both sides between the preceding piles and A method of constructing a continuous underground wall, comprising constructing a continuous pillar-shaped underground wall by repeating a process to construct a trailing pile. 2. The method for constructing a continuous underground wall according to claim 1, wherein said drilling machine has a rock drilling function such as a hydraulic hammer drill to remove underground obstacles. A method for constructing a continuous underground wall, wherein the method is configured to be able to simultaneously construct a continuous underground wall.