JPH1113062A - Simplified pneumatic caisson earth retaining construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a labor-saving simplified pneumatic caisson earth retaining construction method using a new type of a steel sheet pile integrated with a support in which a box-shaped sheet pile of a high pressure resistant type and a rectangular parallelopiped-shaped support assembled with a roller and a jack, and including a hydraulic cylinder are used. SOLUTION: In a simplified pneumatic caisson earth retaining construction method, a box-shaped sheet pile 1, and a rectangular parallelopiped-shaped support 2 assembled with a jack for reaction force and a roller 3 for reducing friction force as derricking members, and provided with a hydraulic cylinder included in a column for vertical motion are used, so the box-shaped sheet pile 1 and the rectangular parallelopiped-shaped support 2 are interlocked with each other to perform boring and caisson fitting in. Work can thus be performed with less labor speedily and safely, so construction cost becomes low. Breakage or deformation of a steel sheet pile, ground sinking on the back of the steel sheet pile, defective driving of the steel sheet pile because of an underground obstacle, etc., which are problems in conventional earth retaining construction method can be solved at a stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple submersible siding method integrating a new steel sheet pile and a shoring system, and more specifically, a high pressure-resistant box sheet pile, rollers and jacks are incorporated therein. In addition, the present invention relates to a labor-saving type simple submersible cranes construction method using a rectangular parallelepiped support having a built-in hydraulic cylinder.

[0002]

2. Description of the Related Art A pier is constructed by installing a pier to prevent the collapse of the ground around a building and a shoring to support the earth pressure and water pressure applied to the wall. A sheet pile is used, and a well-shaped or close-cutting is used for the shoring. For example, in the laying of sewer pipes, a start port and an arrival port are constructed underground, and a fume pipe is driven from the start port to the arrival port by an excavator. It is upset with a steel sheet pile, and is pierced by cutting. The conventional construction method of this mountain retaining method is a so-called post-construction method in which a long steel sheet pile is first driven, excavated, and then a cut is made. Often it is. In addition, conventional steel sheet piles consist of a thin steel sheet,
The contact between the steel sheet pile and the shoring work such as protruding or cutting is surface contact.

[0003]

As described above, in the conventional shoring method, the shoring wall and the shoring work are carried out to construct the shoring wall. Long steel sheet piles are used. This steel sheet pile is thin and has the property of bending under high load, and is relatively weak. Therefore, it cannot be driven into a hard ground or a stratum having obstacles such as boulders and boulders. Further, since the steel sheet pile has relatively low rigidity, when it is used on soft silty ground, there is a problem that the deformation is apt to be large, and the ground subsidence on the back of the steel sheet pile is apt to occur.

Further, it is difficult for conventional sheet piles to be driven in a state where all of the materials used for the construction are completely engaged with each other, and the steel sheet piles are likely to come off. Therefore, repairs such as welding are required, and the construction cost increases. Had become. In addition, when using long steel sheet piles, construction cannot be performed under overhead wires, and conversely, when using short steel sheet piles, steel sheet piles must be welded and connected during construction. Also have.

[0005] On the other hand, a conventional shoring method uses a well-shaped or tensioned shearing. The method of construction is to first drive a steel sheet pile and then excavate, and then drill a well-shaped or tensioned shearing. The so-called post-construction method that includes support works such as is adopted. In this conventional post-construction method, since the steel sheet pile is easily deformed greatly, backfilling after pulling out the steel sheet pile is incomplete, and the ground at the back of the steel sheet pile often sinks. In addition, in this conventional construction method, there are many cases in which an underground obstacle is driven without being found, so that there are many constructions in which a steel sheet pile cannot be inserted to a desired depth.

[0006]

Means for Solving the Problems The present invention has been achieved as a result of earnest research on a ridge retaining method which does not have the above-mentioned problems. In other words, in the present invention, in a mountain retaining method using a steel sheet pile and a shoring method, a box-type sheet pile having rails that can move up and down along a shoring guide is used as the steel sheet pile, while Prior to the construction, a cuboid frame is formed beforehand by using a belly material, a fired material and a support (hereinafter referred to as a rectangular support), and the support is provided with a rectangular support. Use a rectangular parallelepiped support with a built-in hydraulic cylinder to move up and down, and a roller for reducing friction and a jack for reaction force incorporated in the belly material, which can move up and down like a snorkeling insect,
This is a simple method of excavating, submerging, and press-fitting while linking a box-shaped sheet pile and a rectangular parallelepiped supporter.

[0007] All the problems of the above-mentioned conventional mountain retaining method have been solved at once by the simple submersible mountain retaining method of the present invention. That is, by making the steel sheet pile into a box shape in the present invention, the steel sheet pile is hardly deformed even at a high earth pressure, so that even in the silty soft ground, the land subsidence on the back face of the box sheet pile is considerably reduced. In order to extend the length of this box-shaped sheet pile, it is better to attach a joint for connection, so that even short steel sheet piles can be used more efficiently, and construction can be easily done under overhead wires. It is desirable. By providing a high-pressure water jet nozzle at the tip of the box-shaped sheet pile, the box-shaped sheet pile can be easily driven even on hard ground.

Further, in the present invention, the hydraulic cylinder, the jack and the roller are provided on the rectangular parallelepiped support. However, this facilitates the vertical movement of the support and enables a pre-installation method. The ground subsidence on the back side is greatly reduced, and since an underground obstacle can be found and removed before driving the box-shaped sheet pile, the box-shaped sheet pile can always be inserted to a desired depth.

[0009]

FIG. 1 is a partially cutaway plan view of the simple submersible cranes construction method of the present invention, and FIG. 2 is a partially cutaway elevational view of FIG. FIG. 3 is a detailed view of a jack portion and a roller portion of the belly material. FIG. 4 is a perspective view showing a state in which the first place box-shaped sheet pile is being assembled after excavating the construction site and assembling the first-stage rectangular parallelepiped support. FIG. 5 is a perspective view of a partially cutout in which a second rectangular parallelepiped support and a box-shaped sheet pile are assembled.

First, a box-shaped sheet pile (1) is made of a steel plate, and a joint for expanding the box sheet is provided at both ends, and a joint (7) for extending the sheet is provided at an upper end thereof. Further, a high-pressure water jet nozzle (5) was attached to the tip. The shoring (2) is made by assembling a rectangular parallelepiped frame with a steel box-shaped column and H-shaped steel raised material. The box-shaped sheet pile (1) is used for the raised material used here. Rollers (3) and jacks (4) are alternately incorporated at the contact positions, and a hydraulic cylinder (6) is built in the support, and the box-shaped sheet pile (1) and the rectangular parallelepiped support (2) are installed. Up and down movement is made easy.

Next, a construction site was dug out, and a first-stage rectangular parallelepiped support (2) was assembled at this location. A box-shaped sheet pile (1) incorporating a high-pressure water jet nozzle (5) was press-fitted along the outside of the rectangular parallelepiped support (2) at the tip end, and the first-stage simple submersible mountain retaining work was completed. In this construction, it was necessary to dig deeper, so after digging and submerging, the second-stage rectangular parallelepiped support was assembled, and the second-stage box-shaped sheet pile was sequentially moved to the first-stage. After setting it in the joint (7) of the box-shaped sheet pile, press-fit
The assembly of the box-shaped sheet pile of the tier was completed. In the above simple method, the press-fitting of the box-shaped sheet pile was performed very smoothly, and the box-shaped sheet pile was not deformed at all. After the construction was completed, the box-shaped sheet piles were pulled out and the rectangular support was dismantled and removed, and the soil was backfilled. However, land subsidence was small.

[0012]

As described above, the present invention is carried out by using a box-shaped sheet pile and a rectangular parallelepiped support having a jack and a roller incorporated in a belly material and a hydraulic cylinder incorporated in a support ( Pre-construction method), and the present invention has made construction possible safely. In addition, the present invention makes it possible to mechanize the work and reduce labor, so that the construction cost is reduced. In addition, the present invention can be applied to a horizontal excavation in the same manner as a vertical excavation, and thus has a wide range of applications. In addition, the simple method of stopping the submersible hills can be used for large-scale construction because it is possible to use a multi-method.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of the simple submersible cranes construction method of the present invention.

FIG. 2 is a partially cut away elevation view of FIG. 1;

FIG. 3 is a detailed view of a jack portion and a roller portion of the belly material.

FIG. 4 is a perspective view showing a state in which a first place box-shaped sheet pile is being assembled after excavating a work place and assembling a first-stage rectangular parallelepiped support;

FIG. 5 is a perspective view of a partially cutout in which a second-stage rectangular parallelepiped support and a box-shaped sheet pile are assembled.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 1 Box-shaped sheet pile 2 Rectangular support 3 Roller 4 Jack 5 High-pressure water jet nozzle 6 Hydraulic cylinder 7 Box-sheet pile joint 8 Rail 9 Guide

Claims (3)

[Claims] In the erection method using a steel sheet pile and a shoring method, a box type sheet pile having rails that can move up and down along a guide of the shoring method is used as the steel sheet pile. Before the construction, a cuboid frame is formed in advance using a belly material, a fired material and a strut (hereinafter referred to as a cuboid strut), and the cuboid strut is vertically moved to the strut. Use a rectangular cylinder support that has a built-in hydraulic cylinder and a roller for reducing frictional force and a jack for reaction force incorporated in the belly material and that can move up and down like a insect. A simple method of excavating, submerging and press-fitting while linking a box-shaped sheet pile and a rectangular parallelepiped supporter. 2. The method of claim 1, wherein the box-shaped sheet pile is provided with a joint to increase the length. 3. The method of claim 1, wherein the box-shaped sheet pile used in the first stage incorporates a high-pressure water jet nozzle for facilitating press-fitting.