JPS61151314A - Method and device of building underground wall body - Google Patents

Abstract

PURPOSE:To easily build an underground continuous wall even at a passage with a narrow width, by a method wherein a box body made of steel, having an upper part and front and rear parts, all being open, and formed in a trench shape in cross section, is divided into a front and a rear chamber, soil is excavated by means of the front chamber, and an underground wall is built by means of the rear chamber. CONSTITUTION:A box body made of steel, having an upper part and front and rear part, all being open, and formed in a trench shape in cross section, is divided into front and rear chambers 2 and 3, the two chambers are partitioned by a partition plate 41, and a jack thrusting equipment 51 is installed to the rear surface of the partition plate 41. Soil in the front chamber 2 is excavated and discharged with the aid of an excavating equipment and a soil disposing equipment 6 in the front chamber 2. With a spacer inserted, the thrusting equipment 51 is actuated to move forward the front and rear chambers 2 and 3, and a wall body 1 is lifted down in the rear chamber 3. The direction and altitude of the front chamber 2 and the rear chamber 3 are controlled by an altitude control equipment 7, and grout is poured in a gap between the inner surface of the rear chamber 3 and the outer surface of an existing wall body. This enables building of a continuous underground wall by the use of the box body made of steel even at a passage with a narrow width.

Description

DETAILED DESCRIPTION OF THE INVENTION A.Objective of the invention "Field of industrial application" A method for constructing a continuous underground wall in which the wall is continuously constructed underground and used as a wall for various underground structures, and the same. It belongs to the field related to equipment used for.

"Conventional technology" The conventional technology for using continuous underground walls is to construct a continuous underground wall from the ground surface to underground using various large machines or large equipment, or to construct the entire underground wall continuously using the open-cut method. It is to be built by doing so. Moreover, mainly the cast-in-place construction method for walls't4
However, there is a tendency for work using factory-made walls to be less economical.

``Problems to be solved by the invention'' Conventional construction techniques for underground continuous walls involve continuous construction of underground walls from the ground surface to the lower part of the earth using large construction machines or large equipment, or by the cut-and-cover method. As such, there was the following problem.

■It was impossible to construct a continuous underground wall under a narrow passageway, for example, a passageway with a width of around 3 meters, because of the large machinery and equipment required. The cut-and-cut method also has many limitations, allowing only very small, low, continuous walls to be created, and traffic in the passageway being suspended.

■If there are houses or other structures on the ground or underground close to a continuous underground wall, even if the passage width is wide, construction is impossible because it will displace the structure, so in order to make it possible, It was necessary to harden the area around the building using chemical injection methods, or to use a combination of various temporary construction methods.

■If there are various types of small pipes buried in shallow underground areas around underground walls, the size of the small pipes may vary depending on the weight of the large machine.
- Because of crushing, it was necessary to protect or relocate or cut underground pipes for water, sewage, electricity, gas, telephone lines, etc. in advance.

■Constructing underground walls on both sides of a narrow ditch is impossible with the conventional continuous underground wall construction method using large machines, so the ditch is opened little by little by hand, and the excavation is done manually. There was no other option but to construct the wall using a construction method, which required a large amount of construction cost and construction time.

■Construction using conventional technology is not possible when the wall thickness of the underground wall is thin.

■If the underground wall is a factory product and is precast or assembled on site, the progress of conventional technology is slow and the usage of machinery increases, which increases both construction costs and construction time, making it uneconomical.

The present invention seeks to solve the above-mentioned problems which the prior art has made impossible, difficult or uneconomical.

"Means to solve the problem" - Miniaturize the equipment for constructing continuous underground walls. That is, as already described about this device, a steel box body having a trench-shaped cross section with an upper part and front and rear openings slightly wider than the width of the underground wall is dug laterally along the ground surface. Since a continuous underground wall is built by installing, assembling, or pouring an underground wall at the rear of this steel box, it can be constructed even in narrow passages with a width of 2 to 3 meters. I can do it.

■For structures located underground, underground excavation work using a steel box with a narrow or short width will hardly cause a shadow IB on the above-mentioned structures, except in sandy areas with a lot of groundwater. In order to inject the rapidly setting grafting material into the small gaps on the left and right sides of the continuous underground wall, which were left at the rear of the steel box,
Prevent subsidence of surrounding ground and displacement of structures.

■Various small-diameter pipes located in shallow underground locations are made of small-width steel boxes, so displacement and damage due to load will not occur, and cross-sectional pipes located in shallow locations above the top of the wall will be constructed by passing under them. Therefore, there is no need to cut or relocate the piping mentioned above.

■Since the device of the present invention is small and has a small width, the present invention can be used to construct an underground wall if there is some margin in the width of the steel box on both sides of a narrow open channel. I can do it.

■Even if the wall thickness of the underground wall is thin, the width of this device is narrow, so it is possible to construct thin walls.

■The device of the present invention is economical even when the underground wall is a factory product and is thin.

This problem is solved by using a narrow steel box for the device of the present invention.

``Operation'' A steel box body with a groove-shaped cross-section of the top and front and rear openings is installed in the starting shaft. The steel box body is formed of a front chamber consisting of one or two chambers and a rear chamber consisting of one chamber.The front chamber (first front chamber) houses various excavation equipment, and the rear chamber houses jack propulsion equipment. The second front room will be equipped with soil processing equipment such as soil excavation and storage. Further, various posture control equipment is provided on the outside of the steel box as appropriate to constitute an underground wall construction device. When a strong curve is required for an underground wall, the steel box is divided vertically into 2 to 3 pieces and assembled movably, and various water stop equipment is installed between each steel box to make it movable. The underground wall construction apparatus of the present invention is provided with a jack or other advance/retreat equipment between the assembled steel boxes so that each steel box moves forward individually and can easily change direction left, right, up and down. Configure.

First, a wall is suspended from the upper part of the rear chamber, and the action of pushing the wall backward with the jack propulsion equipment is repeated until the wall is erected and brought back into contact with the desk surface.The next time, the suspended wall will also receive the reaction force. The steel box is advanced using jack propulsion equipment and dug into the ground from the front of the vertical shaft. Excavation is carried out using the excavation equipment provided in the front chamber (first front chamber) K at the front of the steel box, and the soil is immediately removed and transported, or the soil is treated with the earth and sand treatment equipment in the second front chamber before being carried out. (For example, transporting muddy water, lifting and loading with a clamshell shovel, etc.) When leaving the wall in the ground using the jack propulsion equipment in the rear chamber, various water supply devices are attached to the front of the wall, and at the rear of the wall Rapidly setting grout is immediately injected into the gap between the body and the side surface of the rear chamber, and between the wall remaining behind the rear chamber and the groove excavated by the steel wall, filling the gap and hardening the groove. Preventing the collapse of the surface, the wall is suspended in the rear chamber, and the excavation and removal process using the excavation equipment in the front chamber is carried out, or the earth and sand processing and carrying out process in the second front chamber and the hanging and installation of the wall in the rear chamber. The steel box is assembled, connected to the rear wall, the wall is used as a reaction force receiver, and the process of propelling the steel box using jack propulsion equipment and grouting are repeated to continuously lay the steel box in the wall metal base.

In some cases, the excavation process can be carried out simultaneously with the steel box propulsion process.

Correction of the directional gradient and lateral inclination of the steel wall is carried out as necessary using a rotary link motion of a jack or other various direction correction devices that project the jig from the outside of the steel wall.

When a particularly sharp curve or steep slope is required, or to make posture control easier, install a steel box in the front and rear chambers, or in the first, second, and rear chambers. Water is cut off divided into 3 chambers, a propulsion and direction adjustment jack is interposed between each chamber, and when each chamber is moved in and out, the water is cut off with the water cutoff device, and combined, the propulsion and direction adjustment jack is used to shut off the water. While setting the direction, slope, and curve easily, as explained above, hang the wall to the rear chamber, assemble and connect, and repeat the following steps to lay the required wall underground. It is.

``Example'' The method and apparatus of the present invention will be described below with reference to examples and the respective drawings.

Figures 1 to 4 are examples ■, that is, claims No. (1)
Section and! (Methods in Section 21 and Section (4), Section (9)
This shows the equipment of paragraphs, (to) paragraphs, and paragraphs υ,
Figure 1 is a plan view, Figure 2 is a side view taken along arrow A-A in Figure 1,
3 and 4 are process side views of the method.

In constructing the wall 1 continuously underground, a steel box having a groove-shaped cross section with an open top and front and rear parts is used as the front chamber 2.
The compartment is divided into a partition plate and a rear chamber 3, and a jack propulsion equipment (including spacers etc.) 51t for moving the front chamber 2 and rear chamber 3 forward is attached to the rear surface of this partition plate. 6 tons of various excavation equipment (e.g., excavator, etc.) and soil removal, storage, and other earth and sand treatment equipment (e.g., mud conveyor, clamshell excavator, etc.) are attached, and various types of equipment are attached to the steel box at appropriate locations. Equipped with direction and attitude control equipment (e.g. rotary link motion of jacks, outriggers, etc.) 7" Ik, and if necessary, to prevent groundwater from entering between the rear inner surface of the rear chamber 3 and the outer surface of the wall 1. Providing the waterproofing device 8 and configuring the device F, using the above device,
The method of continuously laying walls underground includes the step [1] of excavating earth and sand, removing and treating earth and sand in the front chamber 2 using various attached excavation equipment and earth and sand treatment equipment 6, and the process [1] of carrying out earth and sand excavation, earth and sand removal, treatment, etc. with the attached various excavation equipment and earth and sand treatment equipment 6, and While inserting the spacer etc., the reaction force generated is applied to the rear existing wall 1 group and the front chamber 2
and a step [2] of moving the rear chamber 3 forward until a space is created in which the wall body 1t can be hung and installed, or the wall body components can be assembled and the wall body 1t can be manufactured. The hanging and installation of the wall components can be carried out by hanging the wall 1 into the rear chamber using equipment 9, or by assembling the components in the rear chamber to create the wall 1 and connecting it to the existing rear wall. [3] and the front chamber 2
And when the rear chamber 3 moves forward, various direction and attitude control equipment 7 are installed as appropriate.
A step [4] of controlling the forward direction and attitude using the
The wall is continuously installed by carrying out the steps [5] and grouting the gap created between the inner surface of the rear chamber 3 and the outer surface of the existing wall as appropriate depending on the work situation. Process [4
], the direction and attitude control of the steel box can be performed by operating the jack propulsion equipment 5K.

Next, FIGS. 5 and 6 show Example 2, that is, the method of claims (1) and (3) and (5),
It shows the apparatus of paragraphs (9), (b), and (2), where FIG. 5 is a plan view and FIG. 6 is B--B in FIG.
It is a side view as viewed from arrow B.

This embodiment is a modification of Embodiment (2) in which the front chamber 2 is partitioned from the front by a partition plate 4 into a first front chamber and an Sg2 front chamber.

When there is only one front chamber 2 as in Example ①, it is used when the excavated soil has no water content and can be unloaded and transported as it is, but the water content of the excavated soil is high and the excavated soil becomes muddy. If this occurs, it is impossible to transport the excavated soil as it is, so the mud-like excavated soil is transferred to the second front chamber at the rear using the soil processing equipment 6, where it is temporarily stored and the soil and water are removed. In this embodiment, water and soil are separated to some extent and are discharged and transported separately.

Devices other than the method and device described above and the steps of the wall installation method may be carried out in accordance with Example (2).

Next, FIGS. 7 and 8 show Example 2, that is, claims (1) and (6) and ! The method of item (8), the apparatus of item 9, α → item, and α0 item are illustrative. Figure 7 is a plan view, and Figure 8 is a side view taken along the line C--C in Figure 7. be.

This embodiment differs from Embodiment I in that a partition plate 4 for closing is newly provided at the rear of the front chamber 2, and each chamber is made independent so that the front chamber 2 and the rear chamber 3 can be moved forward separately. A new jack propulsion device 5 is installed between the base of the partition plate 4 to control the direction and attitude of the front chamber 2 and to move the front chamber 2 forward. The groove-shaped side plates and the bottom plate are completely fitted to each other, so that each front chamber 2 and rear chamber 3 can independently perform forward movement and direction posture control, The steps of the method for laying the wall 1 include, in addition to the steps described in Example (2), a step [6] of controlling the front chamber 2 in forward movement and direction using a jack propulsion equipment; The walls are installed by performing each step as appropriate according to the work procedure.

Finally, FIGS. 9 and 10 illustrate Example 2, that is, Claims (1) and I! The method of items (7) and (8), the method of items (9) and (2), and the apparatus of item 66 are shown. Figure 9 is a plan view, and Figure 10 is Figure 9. It is a DD arrow side view of .

In this embodiment, the front chamber 2 is divided into a first front chamber and a second front chamber as in the embodiment H, and the device between the rear part of the second front chamber and the front part of the rear chamber 3 is as shown in the embodiment In addition, the methods of using the first front chamber and the second front chamber are as described in Example (2). In this embodiment, the front part of the second front chamber and the first
The rear part of the front chamber 2 is also partitioned by partition plates 4 and 4 so that each can move forward independently.For this purpose, a jack propulsion device 5st is installed between the partition plates 44 and 4. Also, the method for joining the @1 front chamber a and the second front chamber is the same as the method for joining the front chamber 2 and the rear chamber 3 in Example 2. Next, the steps of the method for laying the wall 1 are as follows: Steps [1] to [5] shown in Example ①, Step [6] described in Example ①, and the first front room 2
1t - A step [7] for performing forward movement and direction/posture control is added, and the wall is laid by performing these steps as appropriate according to the work procedure.

C. "Effects of the Invention" As is clear from what has already been stated, the present invention has various effects as shown below.

■ Miniaturize the equipment for constructing continuous underground walls.

That is, as already described about this device, a steel box body having a trench-shaped cross section with an upper part and front and rear openings slightly wider than the width of the underground wall is dug laterally along the ground surface. Since a continuous underground wall is built by installing, assembling, or pouring an underground wall at the rear of this steel box, it can be constructed even in narrow passages with a width of 2 to 3 meters. I can do it.

■ Underground excavation work using a steel box with a narrow width and not too long has almost no effect on structures located underground, except in sandy areas where there is a lot of groundwater. Rapidly setting grout was injected into the small gap on the left and right sides of the continuous underground wall that remained behind the steel box to increase the brightness.
Prevent subsidence of surrounding ground and displacement of structures.

■ Various small-diameter pipes located in shallow underground locations are made of small-width steel boxes, so displacement and damage due to loading will not occur, and cross-sectional pipes located in shallow locations above the top of the wall can be constructed by passing under them. There is no need to cut or relocate the piping mentioned above.

■ Since the device of the present invention is small and has a small width, the present invention can be used to construct an underground continuous wall on both sides of a narrow open channel if there is some extra width in the steel box. I can do it.

■Even if the wall thickness of the underground wall is thin, the width of this device is 1 Because it is narrow, it is possible to construct thin walls.

(2) Even when the underground wall is a factory product and is thin, the device of the present invention can fully demonstrate its economic efficiency.

As described above, by using the narrow steel box of the device of the present invention, all of the great drawbacks of the prior art can be eliminated, and the above-mentioned effects are of extremely great value. be.

[Brief explanation of drawings]

1 to 10 show various embodiments of the method and apparatus of the present invention, and FIGS. 1 to 4 are views of Embodiment I, with FIG. 1 being a plan view and FIG. Fig. 1 is a side view taken along the line A-A, and Figs.
The figures are of Example H, FIG. 5 is a plan view, FIG. 6 is a side view taken along the line B-B in FIG. is a plan view, FIG. 8 is a side view taken along the line C-C in FIG. 7, FIGS. 9 and 10 are views of Example 2, FIG. -D is a side view as viewed from the arrow. Code 1 ・・・・・・・・・・・・・・・Wall 2 ・・・
・・・・・・・・・・・・Anterior room 2I ・・・・・・・・・
・・・・・・・・・IEI Anteroom・・・・・・・・・・
・・・・・・Second front room 3 ・・・・・・・・・・・・・・・
... Rear chamber 4, 4, 4-44, 4g... Partition plate 5
t, 5t, 5m ・・・・・・・・・ Jack propulsion equipment 6 ・・・・・・・・・・・・・・・ Excavation equipment, upper sand processing equipment 7 ・・・・・・・・・...... Direction and attitude control equipment 8 ...... Waterproof device 9 ...... Hanging Installation was done by equipment patent applicant Atsushi Uemura - 1 (and 1 other person)! +19

Claims (16)

[Claims] (1) Regarding the method of constructing walls continuously from the horizontal direction in the ground, a steel box body with a channel-shaped cross-section of the top and front and rear openings is constructed of a front chamber consisting of one or two chambers and one chamber. Divided into a rear chamber, the front chamber is equipped with various excavation equipment, earth removal, storage, and other earth and sand processing equipment, the rear chamber is equipped with jack propulsion equipment, and the steel box body is equipped with jack propulsion equipment in various directions. Attitude control equipment is installed to form an underground wall construction device that has excavation, earth and sand processing, propulsion, and direction and attitude control functions, and the underground wall or wall components are suspended and installed from the upper part in the rear chamber. Or, the process of assembling and connecting and integrating with the existing rear wall, the process of excavating, treating and transporting the face earth and sand using various excavation equipment and earth and sand processing equipment in the front room, and the process of attaching the wall to the wall using the jack propulsion equipment installed in the rear room. A process of propelling the steel box by applying a reaction force, a process of controlling the direction and attitude as necessary using directional and attitude control equipment installed at appropriate locations on the steel box, and a process of controlling the wall and rear chamber. The underground wall is installed from the lateral direction by appropriately injecting grout into the gap between the surfaces and the gap between the groove at the rear of the rear chamber excavated by the steel box and the wall left in the groove. A method of constructing an underground wall body, which is characterized in that it is constructed gradually. (2) The method for constructing an underground wall body according to claim (1), wherein the number of front chambers is one. (3) The method for constructing an underground wall body according to claim (1), wherein the front chamber comprises a first front chamber and a second front chamber. (4) The method for constructing an underground wall body according to claim (1), wherein the front chamber and the rear chamber are separated by one partition plate. (5) The method for constructing an underground wall body according to claim (1), wherein the first front chamber, the second front chamber, and the rear chamber are each partitioned by one partition plate. (6) The method for constructing an underground wall body according to claim (1), wherein the front chamber and the rear chamber are each independent chambers, and a propulsion jack in the direction and attitude control equipment is installed between the two chambers. . (7) The first front chamber, the second front chamber, and the rear chamber are each independent chambers, and a propulsion jack in the direction and attitude control equipment is installed between each chamber. Method of constructing underground walls. (8) Claim (1) states that each chamber can be independently deflected vertically and horizontally by loosely fitting the rear edge and front edge of the steel box of each independently provided chamber. construction method for underground walls. (9) A steel box with a channel-shaped cross section with an opening at the top and front and rear is divided into a front chamber and a rear chamber. The front chamber is equipped with various excavation equipment, soil removal, storage, and other earth and sand processing equipment, and the rear chamber is equipped with various excavation equipment and soil removal, storage, and other soil processing equipment. An apparatus for constructing an underground wall body, characterized in that a jack propulsion facility is provided, and various direction and posture control facilities are further provided at appropriate locations on the steel box body. (10) The underground wall construction apparatus according to claim (9), wherein the number of front chambers is one. (11) The underground wall construction apparatus according to claim (9), wherein the front chamber includes a first front chamber and a second front chamber. (12) The underground wall construction apparatus according to claim (9), wherein the front chamber and the rear chamber are partitioned by one partition plate. (13) The underground wall construction apparatus according to claim (9), wherein the first front chamber, the second front chamber, and the rear chamber are each partitioned by one partition plate. (14) The underground wall construction apparatus according to claim (9), wherein the front chamber and the rear chamber are each independent chambers, and a propulsion jack in the direction and attitude control equipment is installed between the two chambers. . (15) The first front chamber, the second front chamber, and the rear chamber are each independent chambers, and a propulsion jack in the direction and attitude control equipment is installed between each chamber. Equipment for constructing underground walls. (16) Claim (9), in which the rear edge and front edge of the steel box of each independently provided chamber are loosely fitted, so that each chamber can be independently deflected vertically and horizontally. The underground wall construction device described above.