JPH044440B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for moving structures between the outer peripheral surface of the structure and the ground surface when advancing the structure into the ground with shallow earth cover using the propulsion method, towing method, or self-propelled advancement method. This method is concerned with preventing deformation of the ground surface due to the advance of a group of structures by rigidly joining short pieces of edge cutting material and leaving them in gaps between mountains to cut the edges.

Conventional technology Conventionally, when a structure is advanced into shallow ground using a propulsion method, towing method, self-propelled advancement method, etc., the ground surrounding the structure moves simultaneously with the advancement of the structure, especially The ground surface above the structure is deformed.
To prevent this, to cut the edge between the outer circumferential surface of the structure and the ground, strong edge cutting materials such as steel or thick plywood are rigidly connected one after another as edge cutting materials, and then grout is applied to the gap between the structure and the ground. The timber was injected and the edge cuttings were left underground.

Problems to be Solved by the Invention When grout is conventionally injected into the gap between the edge cut material and the ground on the outer circumferential surface of a structure, it is necessary to prevent the injected grout from flowing back into the structure. Therefore, the front surface of the outer periphery of the structure is first sealed before injection, but since it is difficult to seal completely, it may leak into the structure, or it may be injected into the voids in the ground where grouting is not required. Not only is this uneconomical, but sealing must be performed each time grout is injected, which takes time and effort, prolonging the construction period. In addition, especially in shallow ground, there is a risk that the ground surface will be deformed, making it extremely dangerous and difficult to construct.

Means for Solving the Problems The present invention solves the above-mentioned problems, and provides a method and device for cutting edges that can be carried out economically without waste, and can be safely carried out without affecting the ground surface. The purpose is to

In order to achieve this object, the present invention has the following configuration. That is, the edge cutting method and device according to the present invention, when excavating a structure into the ground, convert the necessary inner dimensions of the cutting edge of the structure or the inner peripheral surface of the protective tube into a sturdy edge having an inflatable bag on the outer surface. It is made slightly larger than the outer circumference of the structure so as to have a gap for inserting the short pieces of cutting material, and as the structure moves forward, the short pieces of edge cutting material are rigidly joined one after another inside the cutting edge or in a protective cylinder placed between the structures. The grout material is left as a continuous integral part between the structure and the ground, and the grout material is injected and expanded in a limited manner into the expandable bag to eliminate only the gap between the short pieces of edging material and the ground, thereby removing the ground around the structure. This is to ensure stability.

Function The present invention provides an expansible bag on the outer surface of a short piece of edge cutting material, and injects and expands the grout material in a limited manner into the expansible bag, thereby allowing the protective cylinder between the cutting edge or the structure to move forward. After that, a limited amount of grout is immediately injected into an inflatable bag to fill the voids that occur on the outer surface of the structure, filling only the voids, compacting the loose ground, stabilizing the ground, and strengthening the upper ground. It can be safely and reliably constructed without adversely affecting the surface or surrounding structures, eliminates injection loss, and saves time and effort for silling.

EXAMPLES The present invention will be described by way of examples and drawings.

1 and 2 are a side view and a front view of one embodiment. FIG. 4 is a detailed view of FIG. 1.
As shown in these drawings, when constructing an underground structure by advancing it underground using the propulsion method, towing method, self-propelled advance method, etc., the required area for the blade 2 installed at the tip of the structure ₁ The inner dimension of the circumferential surface is made slightly larger than the outer dimension of the outer circumference of the structure 11 so as to have a gap 4 into which a short piece of sturdy edge cutting material 3 having an inflatable bag 6 arranged on the ground surface ₈ is inserted. The cutting edge 2 and the structure 1 ₁ are dug out, and the edge cutting material short piece 3 with the expandable bag 6 arranged thereon is firmly attached using the edge cutting material short piece 3 inserted earlier in the cutting edge 2 and the bolt 7. do. The injection hose 1 is inserted into the inflatable bag 6 provided in the edge cutting material short piece 3 to fill the gap between the ground 8 and the edge cutting material short piece 3 that is created as the cutting edge 2 excavates.
At the same time, the grout material is injected and expanded in a limited manner to fill the grout material, and at the same time, the loosened ground 8 is compacted to stabilize the ground 8. By sequentially repeating the above steps, the ground mass 8 and the three groups of edge cutting material short pieces left between the groups of structures 1 ₁ and 1 ₂ constitute an integral continuous body.

In order to prevent the edge cutting strips 3 from moving as the structures 1 ₁ , 1 ₂ groups move forward, a stopper member 5 is provided at the temporary earth retention 9 of the starting shaft. 3 are rigidly connected.

Further, as shown in FIG. 3, other embodiments include the first
Protective cylinder 1 disposed between structure 1 ₁ and second structure 1 ₂
An inflatable bag 6 is placed on the ground 8 with the required inner circumferential dimensions of 1.
A gap 4 into which a short piece 3 of sturdy edge cutting material is inserted.
The outer dimension of the second structure 12 is slightly larger than the outer periphery of the second structure ₁₂ , and the short edge cutting material 3 having an inflatable bag 6 arranged therein is rigidly joined within the protective tube 11.
By repeating the same process as in the embodiment, an integral continuous body of three groups of edge cutting material short pieces is constructed between the earth 8 and the outer periphery of the structures after the second structure ₁₂ . Note that 12 is a jacking facility for advancing the first structure ₁₁ . Also,
A movable friction cutter 13 is disposed on the upper surface of the cutting edge 2, the first structure 1 ₁ and the protection tube 11 to prevent movement and deformation of the upper surface ground 8 as the first structure 1 ₁ moves forward. do.

With these configurations, the ground 8 can be stabilized especially in areas with shallow overburden, and at the same time the structures 1 _{1 and 1} can be stabilized.
1. This is a method and device for cutting edges that can be safely and reliably constructed without causing any deformation on the upper ground surface of Group ₂ and without affecting the surrounding ground.

Effects of the Invention As is clear from the above explanation, the present invention provides a short piece of edge cutting material in which an elastic expansible bag is placed on the ground surface in addition to the conventional edge cutting material. After rigidly joining the edge cutting material short piece inserted earlier in the mouth,
Grout material is injected and expanded in an inflatable bag in a limited manner,
A simple structure in which only the gap between the edge cutting material short pieces and the ground is eliminated, and the edge cutting material short pieces are left between the structure group and the ground to create an integrated continuous body, has a large The problems were the difficulty of completely sealing, the uneconomical nature of grouting into voids in the ground that do not require grouting, and the risk of deformation of the ground surface above the group of structures. Certain dangers and uneconomical problems, such as the time and effort required to seal the front upper part of the edge cutting strip each time grouting material is injected, making it impossible to shorten the construction period, are completely eliminated. In addition to this, by injecting and expanding the grout material into the expandable bag of the present invention, the grout material does not flow into unnecessary voids, and the loosening of the ground due to the digging of the cutting edge is compacted and the edges are The gap between the cut pieces and the ground is completely eliminated, and at the same time they are brought into close contact via the inflatable bag, so the ground around the top of the structure group is stabilized. Therefore, it does not cause any deformation to the ground surface, is particularly suitable for areas with shallow overburden, is economical, shortens the construction period, and is technically excellent for safe and reliable construction. A method and apparatus thereof.

[Brief explanation of drawings]

Fig. 1 is a side view of one embodiment, Fig. 2 is a front view of Fig. 1, Fig. 3 is a side view of another embodiment, and Fig. 4 is a detail of the relationship between the edge cutting material strip and the inflatable bag. It is a diagram. 1 ₁ , 1 ₂ ... Structure, 2 ... Cutting edge, 3 ... Short piece of edge cutting material, 4 ... Gap, 5 ... Stopping member, 6 ... Expandable bag, 7 ... Bolt, 8 ... Earth, 9...Temporary soil retention, 10...Injection hose, 11...Protection tube, 12
...Jacket equipment, 13...Mobile friction cutter.

Claims (1)

[Claims] 1. When advancing the structure underground, the gap between the required inner circumferential surface of the cutting edge disposed at the tip of the structure or the protective tube disposed between the structures and the outer circumferential surface of the structure. Insert short pieces of sturdy edge cutting material into the gap, prevent movement at the rear end with a stopper member, and as the structure moves forward, the sturdy short pieces of edge cutting material are rigidly joined one after another inside the cutting edge or protective cylinder. , in a method of cutting the edge between the required outer circumferential surface of the structure and the ground by leaving a continuous body of short pieces of sturdy edge cutting material between the ground and the structure, the short pieces of edge cutting material have an expansible material on the ground surface side. By arranging a bag and injecting a limited amount of grout into the expandable bag and expanding it to fill the voids on the ground side of the short pieces of edging material, the ground around the structure is stabilized when the structure moves forward. Characteristic edge cutting method. 2. A cutting edge whose internal dimensions are slightly larger than the dimensions of the structure so as to have a space for inserting a short piece of sturdy edge cutting material, or a protective tube installed between the structures, or inside the cutting edge or protective tube. In the edging device, the edging device comprises a group of sturdy edging material short pieces that are rigidly connected to each other and inserted into the outer circumferential surface of the structure through the gap and left therein, the edging material short pieces are edging material short pieces having an expandable bag for injecting grout; An edge cutting device characterized by: