WO2017003224A1

WO2017003224A1 - Soil nailing construction method

Info

Publication number: WO2017003224A1
Application number: PCT/KR2016/007052
Authority: WO
Inventors: 홍찬윤
Original assignee: 홍지기술산업주식회사; 리콘(주); 홍찬윤
Priority date: 2015-06-30
Filing date: 2016-06-30
Publication date: 2017-01-05
Also published as: KR101931701B1; KR20170003250A

Abstract

The present invention discloses a soil nailing construction method characterized by comprising: a step of manufacturing an expanding reinforcing member (100) designed to expand when a hydraulic fluid enters the internal hollow space thereof; a boring step of forming a bored hole (1) in a sloped surface; an embedding step of embedding the expanding reinforcing member (100) into the bored hole (1); an expanding step of introducing hydraulic fluid into the hollow space of the expanding reinforcing member (100) to expand the latter; a cutting step of cutting the front end of the expanding reinforcing member (100) that is expanded to form a cut open portion (101); and a reinforcing step of forming a combined structure of a core (150) and a grout (G) for the hollow space of the expanding reinforcing member (100) through the cut open portion (101). Thus, the collapsing of a sloped surface during construction can be prevented, and a safer sloped surface reinforcing structure can be obtained.

Description

Soil Nailing Method

The present invention relates to the field of civil engineering, and in particular, to a soil nailing process.

In order to stabilize the slope, a small nailing method for forming perforations by forming perforated holes in the slope, injecting reinforcing bars, and injecting grout is actively used.

By the way, the conventional soil nailing method has been pointed out that the problem of the slope collapse may occur during construction because the strength of the solidified body is not sufficient for the period before the injected grout is cured.

The present invention was derived to solve the above problems, the object of the present invention is to propose a soil nailing method to prevent the occurrence of slope collapse during construction, to obtain a more stable slope reinforcement structure.

In order to solve the above problems, the present invention comprises the steps of manufacturing an inflatable reinforcement member 100 to expand by the inflow of pressure fluid to the inner hollow; A punching step of forming a punching hole 1 on a slope; An indentation step of injecting the inflatable reinforcement member 100 into the drilling hole 1; An expansion step of expanding and expanding a pressure fluid with respect to the hollow of the expansion type reinforcement member 100; Cutting step of cutting the front end of the expanded reinforcement member 100 in the expanded state to form a cutting trim 101; And a reinforcing step of forming a combination structure of the core material 150 and the grout (G) with respect to the hollow of the expandable reinforcing member 100 through the cutting trimming 101.

The inflatable reinforcement member 100 is formed to have the hollow in which the pressure fluid is injected through the front trimming portion 111, the rear end is closed, the hollow body formed with the recessed portion 114 along the longitudinal direction ( 110); Shear cap 120 for coupling to the outside of the front end of the hollow body 110 of the concave inlet portion 114 is formed; And a rear end cap 130 coupled to an outer side of the rear end of the hollow body 110 in a state where the concave inlet 114 is formed, wherein the hollow body 110 is through the shear trimming part 111. It is preferably expanded by the pressure fluid supplied to the hollow.

In the reinforcing step, it is preferable to insert the reinforcing bar which is the core material 150 into the inside of the expandable reinforcing member 100 and to fill the grout G around the reinforcing bar.

The expandable reinforcing member 100, the rupture portion 140 is formed in a portion to rupture after expansion by the pressure fluid, the expansion step, the pressure fluid against the hollow of the expandable reinforcing member 100 Injecting and expanding the in grout (G) and rupturing the rupture unit 140; Filling the space between the expandable reinforcing member 100 and the drilling hole 1 by the grout (G) flowed out by the tear of the rupture unit 140.

The expandable reinforcing member 100, the rupture portion 140 is formed in a portion to rupture after expansion by the pressure fluid, the expansion step, the pressure fluid against the hollow of the expandable reinforcing member 100 Injecting and expanding phosphorus water and rupturing the rupture unit 140; Injecting the grout (G) into the hollow of the expanded reinforcement member 100 in the expanded state, the expansion reinforcement member (by the grout (G) flowing out through the ruptured portion 140) Filling the space between the 100 and the drilling hole (1); preferably.

The reinforcing step may include inserting the reinforcing bar, which is the core material 150, through the cutting trimmer 101 with respect to the hollow of the expandable reinforcing member 100 in the state where the grout G is filled; It is preferable to include.

[Favorable effect]

The present invention proposes a soil nailing method to prevent the occurrence of slope collapse during construction and to obtain a more stable slope reinforcement structure.

Figure 1 below shows an embodiment of the present invention,

1 is a perspective view of a state before expansion of the inflatable reinforcement member.

2 is a perspective view of a state after the expansion of the inflatable reinforcement member.

3 is a cross-sectional view of the inflatable reinforcement member.

4 to 8 is a process chart of the soil nailing method.

*** Explanation of Codes ***

1: drilling hole 100: expansion type reinforcement member

101: cutting part 110: hollow body

111: shear opening 114: recessed portion

120: front end cap 130: rear end cap

140: rupture unit 150: heartwood

G: Grout

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 1, the small nailing method according to the present invention is basically made by the following process.

An expandable reinforcing member 100 is manufactured to expand by inflow of pressure fluid into the inner hollow (FIGS. 1 to 3).

The perforation hole 1 is formed in four slopes (FIG. 4).

The expansion-type reinforcement member 100 of the state before expansion with respect to the drilling hole 1 is mounted (FIG. 5).

A pressure fluid is introduced into the hollow of the inflatable reinforcement member 100 and expanded (FIG. 6).

The cutting edge 101 is formed by cutting the front end of the expanded reinforcement member 100 in the expanded state (FIG. 7).

With respect to the hollow of the expandable reinforcing member 100 through the cutting trimming 101, a combination structure of the core material 150 such as reinforcing bars and the grout G is formed (FIG. 8).

That is, as in the related art, instead of merely forming a combination structure of reinforcing bars and grout with respect to the drilling hole 1, a reinforcing structure is first formed by expanding the expandable reinforcing member, and secondly, It is to form a reinforcement structure by the combination of core material and grout for the inside.

Therefore, during the period until the injected grout is cured, the occurrence of slope collapse during construction is prevented by the reinforcing effect of the expansion of the expandable reinforcing member, and after curing of the grout, Combination reinforcement structure has an effect that can achieve a more stable permanent slope reinforcement structure.

The expansion type reinforcement member 100 is formed to have a hollow in which the pressure fluid is injected through the front trimming portion 111, the rear end is closed, and the hollow body 110 having the recessed portion 114 formed along the longitudinal direction. ; Shear cap 120 for coupling to the outside of the front end of the hollow body 110 of the concave inlet 114 is formed; And a rear end cap 130 coupled to the rear end outer side of the hollow body 110 in a state in which the recessed part 114 is formed.

The hollow body 110 is formed by a material such as a steel pipe, it is expanded by a pressure fluid, such as water, grout and the like supplied to the hollow through the shear trimming portion (111).

EMBODIMENT OF THE INVENTION Hereinafter, the specific Example of the construction method by this invention is described.

First, injecting water as a pressure fluid to inflate the expandable reinforcing member 100, insert the reinforcing bar as the core material 150 to the hollow therein, and to fill the grout (G) around it. .

This is a preferred embodiment when the ground is relatively hard.

Second, it is an embodiment of applying the expansion-type reinforcement member 100 in which the rupture portion 140 is formed in a portion to rupture after expansion by the pressure fluid.

In this case, the grout (G), which is a pressure fluid, is injected into the hollow of the expandable reinforcing member 100 to expand and rupture the rupture unit 140.

The space between the expandable reinforcing member 100 and the drilling hole 1 is filled by the grout G flowing out by the rupture of the rupture unit 140.

At this time, since the hollow of the inflatable reinforcement member 100 is filled with grout (G), the secondary reinforcement structure is merely inserted into the hollow through the cutting trimming portion 101 to the hollow. Can be formed.

The grout flowing through the rupture can fill the area between the outer surface of the expandable reinforcing member 100 and the inner surface of the drilled hole and the surrounding ground to form a solid body, thereby achieving a more stable support structure.

Third, this is also an embodiment using the expansion-type reinforcement member 100 is formed with a tear portion 140 as above.

This expands by injecting water, which is a pressure fluid, into the hollow of the inflatable reinforcement member 100, and ruptures the rupture unit 140.

The grout (G) is injected at a high pressure with respect to the hollow of the expanded reinforcement member 100 in the expanded state, and the expandable reinforcement member 100 is formed by the grout G flowing out through the ruptured rupture unit 140. The space between the drilling holes 1 is filled.

Also in this case, since the hollow of the expandable reinforcing member 100 is filled with grout (G), only the reinforcing bar, which is the core material 150, is inserted into the hollow through the cutting trimming portion 101. The reinforcement structure can be formed.

This has the advantage that the effect of the second embodiment can be obtained while reducing the use of expensive grout.

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

Claims

Manufacturing an expandable reinforcing member 100 to expand by inflow of pressure fluid into the inner hollow;

A punching step of forming a punching hole 1 on a slope;

An indentation step of injecting the inflatable reinforcement member 100 into the drilling hole 1;

An expansion step of expanding and expanding a pressure fluid with respect to the hollow of the expansion type reinforcement member 100;

Cutting step of cutting the front end of the expanded reinforcement member 100 in the expanded state to form a cutting trim 101;

Reinforcing step of forming a combination structure of the core material 150 and the grout (G) with respect to the hollow of the expansion-type reinforcement member 100 through the cutting trim 101;

Soil nailing method comprising a.
The method of claim 1,

The inflatable reinforcement member 100,

A hollow body (110) formed to have the hollow in which the pressure fluid is injected through the front trim (111), the rear end of which is closed, and the recess (114) is formed along the longitudinal direction;

Shear cap 120 for coupling to the outside of the front end of the hollow body 110 of the concave inlet portion 114 is formed;

And a rear end cap 130 coupled to the rear end outer side of the hollow body 110 in a state in which the recess part 114 is formed.

Said hollow body (110) is a soil nailing method characterized in that the expansion by the pressure fluid supplied to the hollow through the shear trimming (111).
The method of claim 1,

The reinforcement step,

Soil nailing method, characterized in that for inserting the reinforcing bar which is the core material 150 to the inside of the expandable reinforcing member 100, and filling the grout (G) around it.
The method of claim 1,

The expansion type reinforcing member 100, the rupture portion 140 is formed in a portion so as to rupture after expansion by the pressure fluid,

The expansion step,

Injecting and expanding the grout (G), which is the pressure fluid, into the hollow of the inflatable reinforcement member 100 and rupturing the rupture unit 140;

Filling the space between the expandable reinforcing member 100 and the drilling hole 1 by the grout G flowing out by the rupture of the rupture unit 140;

Soil nailing method comprising a.
The method of claim 1,

The expansion type reinforcing member 100, the rupture portion 140 is formed in a portion so as to rupture after expansion by the pressure fluid,

The expansion step,

Injecting and expanding water, the pressure fluid, into the hollow of the inflatable reinforcement member 100 and rupturing the rupture unit 140;

Injecting the grout (G) into the hollow of the expanded reinforcement member 100 in the expanded state, the expansion reinforcement member (by the grout (G) flowing out through the ruptured portion 140) Filling a space between the 100 and the drilling hole (1);

Soil nailing method comprising a.
The method according to claim 4 or 5,

The reinforcement step,

Inserting the reinforcing bar, which is the core material 150, through the cutting trimmer 101 with respect to the hollow of the expandable reinforcing member 100 in the state where the grout G is filled;

Soil nailing method comprising a.