JP2000104247A - Structural body and installation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for installing a structural body suited to a case of constructing in the earth. SOLUTION: An excavating hole 11 is excavated in the earth, and collapse preventing liquid 12 such as bentonite muddy water for preventing the excavating hole 11 from collapsing is filled therein. A structural body forming member 13 formed by beforehand installing a reinforcing material in a bag material is inserted in the excavating hole 11. Mortar or concrete is injected in the bag material from an upper part of the bag material in a hollow state of the structural body forming member 13 by a concrete pump, etc., to install a structural body 15 in the earth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure using a bag material and a reinforcing material and a method for installing the same.

[0002]

2. Description of the Related Art A chain saw type drilling device is inserted vertically or diagonally into the ground to a predetermined depth, and is traversed as it is to drill a continuous groove-shaped hole in the ground. There is a construction method of constructing a vertical underground continuous wall, or constructing a revetment with a continuous slope wall diagonally along the slope of the river.

When constructing these underground continuous walls and retaining seawalls, excavation is performed while filling up the upper part of the excavation hole with muddy water such as bentonite to prevent collapse of the excavation hole.

[0004] After that, a reinforcing material made of steel such as a reinforcing bar is placed in the drilling hole, and concrete is poured into the drilling hole using a tremy tube or the like to construct a continuous wall.

[0005]

As described above, when constructing a structure underground, muddy water is used to prevent the collapse of the excavation hole. There is a problem that muddy water is mixed into the inside, whereby the strength of the concrete is reduced, and a section of the hardened wall is lost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a structure suitable for building a structure underground and a method of installing the structure.

[0007]

According to the first aspect of the present invention, there is provided a bag material, a reinforcing material incorporated in the bag material, and a mortar injected into the bag material and integrated with the reinforcing material. And a structure provided with any one of concrete.

Accordingly, one of the mortar and the concrete injected into the bag material is integrated with the reinforcing material without being affected by the outside of the bag material, so that the strength and shape are secured. .

According to a second aspect of the present invention, a hole is excavated in the ground, and a bag material containing a reinforcing material is inserted into the hole.
This is a method of installing a structure for injecting either mortar or concrete into the inside of the bag material.

[0010] Thus, by injecting either mortar or concrete into the bag material in the hole excavated in the ground, a structure not affected by the outside of the bag material is installed in the ground. I do.

According to a third aspect of the present invention, in the method of installing a structure according to the second aspect, a hole excavated in the ground is filled with a collapse preventing liquid for preventing collapse of the hole. This is how to install the structure.

[0012] Thereby, the bag material containing the reinforcing material is inserted into the liquid for preventing collapse of the holes, and one of mortar and concrete is injected into the bag material.
When the mortar or concrete is directly poured into the anti-collapse liquid, the anti-cold liquid is prevented from being mixed, the strength of the liquid is prevented from lowering, and the cross-sectional loss of the hardened wall is prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

[0014] As shown in FIG.
And drill this hole (hereinafter referred to as drill hole 11)
Inside, a collapse prevention liquid 12, such as bentonite mud, for preventing the collapse of the borehole 11 is injected and filled.

The drilling hole 11 is formed by inserting a chainsaw type drilling device (not shown) to a predetermined depth in the ground and traversing it as it is, or while shifting the auger screw type drilling device laterally at a predetermined pitch. It is formed by inserting it into the ground.

This chain saw type or auger screw type excavator excavates soil and excavates the excavation hole.
It also has a function of injecting a collapse prevention liquid 12 such as bentonite muddy water into 11.

As shown in FIGS. 1 (B) and 1 (C), in a drilling hole 11 filled with a collapse preventing liquid 12 such as bentonite muddy water, a structure in which a reinforcing material is previously incorporated in a bag material is formed. The member 13 is inserted.

As shown in FIG. 1 (D), through the pipe 14 from a concrete pump or the like, the bag material in the hollow state of the structure forming member 13 inserted into the drilling hole 11 is taken out of the bag material. Either mortar or concrete is injected into the inside, and the structure 15 is installed underground.

As shown in FIGS. 2 (A) and 2 (B), the structure forming member 13 which is supplied with mortar or concrete is provided.
Has a bag member 16 and a reinforcing member 17 built in the bag member 16.

The bag material 16 of the structure forming member 13 is made of a material having perfect water stopping property or a material having a slight water permeability depending on the purpose of use, and is made of an optimal material according to the situation in a timely manner. For example, a synthetic resin film, rubber, and the like have water stopping properties, and a cloth and the like have water permeability. An injection port 18 for injecting mortar or concrete is provided at an upper portion of the bag material 16.

The reinforcing member 17 is formed of a reinforcing bar, steel, or the like, and a spacer 21 for fitting the bag member 16 to a certain degree of swelling is fitted to the vertical bar 22.
Are welded in a lattice shape, and the bag material 16 is formed so as to enclose the reinforcing material 17.

Then, as shown in FIGS. 3A and 3B, mortar or concrete 24 is injected from the injection port 18 into the inside of the bag material 16 to fill the bag material.
Inflate 16, mortar or concrete as it is 24
Is solidified and integrated with the reinforcing member 17 to form the structure 15. When the bag material 16 expands due to the injection of the mortar or the concrete 24, the excess collapse preventing liquid 12 overflows from the inside of the borehole 11.

As shown in FIG. 4, the drilling hole 11 is formed in a groove shape by, for example, traversing the chainsaw drilling device, and a plurality of structures 15 are formed in the drilling hole 11 in the vicinity thereof. By constructing so that the bag material 16 to contact
Build a continuous wall underground. The solid content 12a in the collapse prevention liquid 12 such as bentonite muddy water remains so as to fill the gap between the excavation hole 11 and the expanded bag material 16.

These structures 15 are light in weight and can be easily transported to the construction site, even when the bag material 16 and the reinforcing material 17 are integrally formed in a factory, as compared with a precast concrete member. Furthermore, bag material 16 and reinforcing material 17
Is transported to the construction site in an unfinished state, and is completed at the construction site by welding or the like.

Then, in the collapse prevention liquid 12 in the borehole 11,
The bag material 16 in which the reinforcing material 17 is incorporated is inserted, and the bag material 16 is inserted.
By injecting either mortar or concrete 24 into the inside, the structure 15 which is not affected by the collapse prevention liquid 12 outside the bag material 16 can be installed underground.

That is, when the mortar or concrete 24 is directly poured into the anti-collapse liquid 12, the mixing of the anti-collapse liquid 12 is prevented by the bag material 16, and the strength of the mortar or concrete 24 due to the admixture of the anti-collapse liquid 12. Prevention of deterioration and prevention of cross-sectional loss of the cured wall can be achieved, and a uniform wall with stable quality can be constructed.

Further, a reinforcing member 17 formed of a reinforcing bar, a steel material, or the like can be arbitrarily arranged in the bag member 16. Further, by arranging a pipe which also serves as a reinforcing material in the transverse direction of the bag material 16 so as to penetrate the bag material, the present invention can be applied to a so-called water-permeable wall which can drain a necessary amount of back water.

The structure 15 of the illustrated embodiment is
This is an example of continuous application of underground vertical walls such as water barriers underground.However, the invention is not limited to this, and it is possible to construct dikes along slopes of rivers. The same can be applied to the case where the middle inclined wall is continuously constructed.

Furthermore, this structure 15 is also applicable to a case where a wall facing the atmosphere or water, such as a retaining wall or a retaining wall, is constructed by excavating one side of an underground continuous wall. It is possible.

In addition, the structure 15 can be applied not only to a wall but also to a case where a pillar is installed in the ground. In that case, the reinforcing material may be formed in the same cage shape as the precast concrete column.

[0031]

According to the first aspect of the present invention, one of the mortar and concrete poured into the bag material is integrated with the reinforcing material without being affected by the outside of the bag material. Therefore, it is possible to provide a structure capable of securing stable strength and shape even when building underground by on-site construction.

According to the second aspect of the present invention, a bag material containing a reinforcing material is inserted into a hole excavated in the ground, and one of mortar and concrete is injected into the inside of the bag material. Therefore, compared to a case where mortar or concrete is directly injected into a hole excavated in the ground, a structure that is not affected by soil in the hole can be installed in the ground. In addition, since it is transported to the construction site in a lightweight state with only built-in reinforcing material in the bag material, concrete is injected into the bag material in the hole and the structure is completed, so the transportability is good. It also has the advantage of on-site construction.

According to the third aspect of the present invention, the hole excavated in the ground is filled with the anti-collapse liquid for preventing collapse of the hole, and the reinforcing material is contained in the anti-collapse liquid. By inserting a bag material with a built-in, and injecting either mortar or concrete into this bag material, the mixing of the mortar or concrete that occurs when the mortar or concrete is directly poured into the crush prevention liquid is prevented. This can prevent the mortar and concrete from decreasing in strength, and can also prevent the cross-section of the cured wall from being lost.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a method for installing a structure according to the present invention, in which (A) is a cross-sectional view showing a state in which a collapse prevention liquid is filled in an excavation hole, and (B) is a sectional view. Sectional view showing a state in which a structure forming member is being inserted into the borehole,
(C) is a cross-sectional view showing a state where the structure forming member is completely inserted into the excavation hole, and (D) is a structure formed by injecting concrete or the like into the bag material of the structure forming member. FIG. 4 is a cross-sectional view showing a state in which the cover is folded.

FIG. 2A is a horizontal sectional view showing a reinforcing material and a bag material of the above structure, and FIG. 2B is a vertical sectional view thereof.

FIG. 3A is a horizontal sectional view of the above structure, and FIG. 3B is a vertical sectional view thereof.

FIG. 4 is a cross-sectional view showing a continuous wall formed by the above structure.

[Explanation of symbols]

 11 holes 12 anti-collapse liquid 15 structure 16 bag material 17 reinforcing material 24 mortar or concrete

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeyuki Kabazawa 1-27-27 Konan, Minato-ku, Tokyo Inside Japan Concrete Industry Co., Ltd. No. 7 Tenox Co., Ltd. (72) Inventor Kazuyoshi Ota 6-13-7 Akasaka, Minato-ku, Tokyo F-term in Tenox Co., Ltd. (Reference) 2D018 DA01 2D049 EA01 EA02 EA03 EA15 GA03 GB10 GD01 GE00 GE06

Claims (3)

[Claims] 1. A bag material, a reinforcing material incorporated in the bag material, and one of mortar and concrete injected into the bag material and integrated with the reinforcing material. The structure to do. 2. A hole is excavated in the ground, a bag material containing a reinforcing material is inserted into the hole, and one of mortar and concrete is injected into the inside of the bag material. How to install the structure. 3. The method according to claim 2, wherein the hole excavated in the ground is filled with a collapse preventing liquid for preventing collapse of the hole.