KR101835492B1

KR101835492B1 - Grouting Reinforcement Apparatus

Info

Publication number: KR101835492B1
Application number: KR1020150181125A
Authority: KR
Inventors: 박재현; 박진
Original assignee: 박재현; 박진
Priority date: 2015-12-17
Filing date: 2015-12-17
Publication date: 2018-03-09
Also published as: KR20170072667A

Abstract

The grouting reinforcement device according to the present invention is provided in at least one of at least two tension bars, a coupler provided between the tension bars adjacent to each other so that a compressive force acts between adjacent tension bars, and both ends of the coupler, And an elastic covering.

Description

Grouting Reinforcement Apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grouting method, and more particularly, to a grouting reinforcement device capable of effectively reinforcing a ground by providing a compressive force to a ground, and a grouting reinforcement method using the grouting reinforcement device.

Generally, the term "grouting" refers to stabilizing the ground by injecting a predetermined grouting material such as cement, mortar or the like into the ground for the purpose of preventing water leakage or stabilizing the soil in civil engineering works.

Recently, according to the development of industrialization, it is inevitable to excavate a tunnel or to develop steep slopes for the purpose of constructing a road or constructing a road. For this purpose, a stabilization measure is required to meet the stability of construction, economy, and environmental integrity .

In particular, when excavating a tunnel for construction of a railway or an automobile road, it is often difficult to construct the tunnel due to the situation of the ground or water, and the support effect is lowered. Therefore, a reinforcement method for a safe and efficient tunnel construction is required.

In such a reinforcement method, a grouting method for reinforcing the excavation surface of a tunnel using a steel pipe is widely used. The grouting method is a method in which a perforation hole is drilled in an excavation surface of a tunnel or the like so as to have an inclination angle of a predetermined angle, a plurality of steel pipes are inserted into the hole, a grouting material is injected into the space, So that the surrounding ground is reinforced.

That is, in the grouting method, the efficiency of the reinforcing performance is determined according to how firmly and uniformly the grouting material is injected into the hollow space around the perforation hole.

In order to increase the efficiency of the grouting method, steel pipes having various structures have been developed and used in the reinforcement work. In some cases, grouting is performed after applying the tensile force to the steel pipe, so that a compressive force acts on the ground.

However, in the case of the conventional grouting method, there is a problem that when a part of the steel pipe is broken, all of the prestress applied throughout the steel pipe is released. That is, the steel pipe has a problem in that it is weak to make a structure to reinforce the ground through the compressive force.

Therefore, a method for solving such problems is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a grouting reinforcement device capable of stably reinforcing a ground by providing a vertical compressive force and a grouting reinforcement method using the grouting reinforcement device.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a grouting apparatus comprising at least two tension bars, a coupler provided between the tension bars adjacent to each other such that a compressive force acts between adjacent tension bars, And includes a stretchable cover having elasticity.

The expansion and contraction cover may include a seating portion having a width larger than the width of the coupler and having a seating groove in which one end of the coupler is seated.

In addition, the stretchable cover may include a head formed so that at least a part thereof is reduced in cross-sectional area toward the outside.

The depressed groove may be formed around the elastic cover so that the grouting hose can pass therethrough.

The tension bar may further include a first tension portion connected to a lower portion of the coupler and a second tension portion connected to an upper portion of the coupler; Wherein the coupler comprises a housing, a first fixing part fixed to one side of the housing, the first fixing part connected to the first tension part, the second fixing part fixed to the other side of the housing in a state spaced apart from the first fixing part, A moving part which is provided inside the housing and is coupled to the second tension part and is moved to the second fixing part side when the tension bar is tensioned, And an elastic member that provides a compressive force between the two fixing portions.

The elastic member may be compressed when one end thereof is in contact with the moving part and the other end is in contact with the second fixing part and the moving part moves in the second fixing part direction.

The elastic member may be formed to surround the second tensile member.

The coupler may further include a sealing member provided on at least one of the first fixing part and the second fixing part to prevent fluid from flowing into the housing.

Also, a plurality of the couplers may be provided, and the first tensile portion of the coupler located at the upper portion may be used as the second tensile portion of the coupler located at the lower portion.

According to another aspect of the present invention, there is provided a grouting reinforcement method using grouting reinforcement, comprising the steps of: drilling a perforation hole in a ground; inserting the grouting reinforcement into the perforation hole; Anchoring at least a portion of the grouting reinforcement device, tensioning the tension bar so that a compressive force acts between adjacent tension bars, and injecting a grouting material into the perforation hole.

The grouting reinforcement device and the grouting reinforcement method using the grouting reinforcement device of the present invention for solving the above problems have the following effects.

First, there is an advantage that stable reinforcement can be performed by providing vertical compressive force on the ground.

Secondly, since the elasticity of the stretchable cover can provide a displacement even after the grouting, it is advantageous to provide an effect of pulling each other between the upper region and the lower region of the ground around the coupler.

Third, the structure is simple and can be easily installed in the perforation hole formed in the ground.

Fourth, since the tension bars are connected to each other by separating the tension bars, it is possible to prevent breakage due to compressive force, which is often seen in steel pipes.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

FIG. 1 is a view illustrating a structure of a coupler in a grouting reinforcement apparatus according to an embodiment of the present invention; FIG.
FIG. 2 is a sectional view of a grouting reinforcement apparatus according to an embodiment of the present invention.
FIGS. 3 and 4 are views showing details of a grooved reinforcing apparatus according to an embodiment of the present invention.
5 is a view showing a tunnel for applying a grouting reinforcement method according to an embodiment of the present invention;
6 is a view showing a perforation hole formed in an upper ground of a tunnel for applying a grouting reinforcement method according to an embodiment of the present invention;
FIG. 7 is a general view of a grouting reinforcement device applied to a grouting reinforcement method according to an embodiment of the present invention; FIG.
FIG. 8 is a view showing a grouting reinforcement device inserted into a perforation hole in a grouting reinforcement method according to an embodiment of the present invention; FIG.
FIG. 9 is a view illustrating a grouting reinforcement device anchored in a perforation hole in a grouting reinforcement method according to an embodiment of the present invention; FIG.
10 is a view showing a grouting reinforcement method according to an embodiment of the present invention in which a tension bar is tensioned to generate a compressive force;
11 is a view illustrating a grouting reinforcement method according to an embodiment of the present invention in which a grouting material is injected into a perforation hole;
12 is a view illustrating a method of providing a pulling force between an upper region and a lower region of a ground around a coupler, in a grouting reinforcement method according to an embodiment of the present invention;
FIG. 13 is a view showing a reinforcement state in a case where a perforation hole penetrates through a ground in a grouting reinforcement method according to an embodiment of the present invention; FIG. And
FIG. 14 is a view showing a structure of a coupler in a grouting reinforcement apparatus according to another embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

FIG. 1 is a view showing a structure of a coupler 100 in a grouting reinforcement apparatus according to an embodiment of the present invention. FIG. 2 is a sectional view of a grouting reinforcement apparatus according to an embodiment of the present invention, 125 in a state in which the moving part 150 is moved.

1 and 2, a grouting reinforcement apparatus according to an embodiment of the present invention includes tension bars 120 and 125, a coupler 100, and a stretch cover 170. As shown in FIG.

At least two tensile bars 120 and 125 are provided, and the tensile bars 120 and 125 are tensioned before grouting to generate a compressive force. The tension bars 120 and 125 may include a first tension unit 120 connected to the lower portion of the coupler 100 and a second tension unit 120 connected to the upper portion of the coupler 100, And a second tension portion 125. [

The coupler 100 is provided between the tension bars 120 and 125 adjacent to each other so that a compressive force acts between the tension bars 120 and 125 adjacent to each other. In the present embodiment, the coupler 100 includes a housing 110, A first fixing part 130, a second fixing part 140, a moving part 150, and an elastic member 160. The first fixing part 130, the second fixing part 140,

The housing 110 has a hollow therein and the first fixing part 130, the second fixing part 140, the moving part 150, and the elastic member 160 are accommodated in the hollow do.

The first fixing part 130 is fixed to one side of the housing 110 and the second fixing part 140 is fixed to the other side of the housing 110 in a state of being separated from the first fixing part 130. [ Respectively.

The moving part 150 is provided in a space between the first fixing part 130 and the second fixing part 140 and the elastic part 150 is provided between the moving part 150 and the second fixing part 140, And the member 160 is accommodated.

The moving part 150 is provided to be in contact with the first fixing part 130 in a state of being separated from the second fixing part 140 by the elastic member 160 in a normal state, When the elastic member 160 moves toward the second fixing part 140, the elastic member 160 may be compressed.

At this time, the first fixing part (130) is connected to the first tension part (120). That is, the first tension unit 120 may be fixed to the first fixing unit 130 so as not to be separated.

A thread 122 is formed on an outer circumferential surface of the first tensile portion 120 and a thread 122 of the first tensile portion 120 is formed on an inner circumferential surface of the first fixing portion 130. [ And a thread 132 which is engaged with the thread 132 is formed. Accordingly, the first tension unit 120 is fixed in the inner side of the first fixing unit 130, and can be separated from the first fixing unit 130 when the first tension unit 130 is rotated in one direction. When the first tension unit 120 is rotated in the other direction, the first tension unit 130 can be coupled with the first tension unit. However, these coupling methods can be variously performed, and are not limited to the same manner as in this embodiment.

One end of the second tension unit 125 extends through the second fixing unit 140 and extends into the housing 110. The moving unit 150 and the second tension unit 125 are disposed in the housing 110, .

Since the second tensioning unit 125 and the moving unit 150 are freely movable between the first fixing unit 130 and the second fixing unit 140, The moving unit 150 can be moved toward the second fixing unit 140 when the unit 140 is pulled outward. At this time, as described above, the elastic member 160 will be compressed.

Specifically, in this embodiment, one end of the elastic member 160 is in contact with the moving part 152, and the other end thereof is in contact with the second fixing part 140. The elastic member 160 is formed so as to surround the second tension unit 125 and is compressed when the moving unit 150 moves in the direction of the second fixing unit 140. After that, It is possible to provide a compressive force.

In the present embodiment, a thread 127 is formed on the outer peripheral surface of the second tension unit 125, and a screw thread 127 engaging with the thread 127 of the second tension unit 125 is formed on the inner peripheral surface of the moving unit 150. [ So that they can be coupled and separated from each other. However, the manner of combining them is not limited thereto.

The coupler 100 may further include a sealing member 180 provided on at least one of the first fixing part 130 and the second fixing part 140 to prevent fluid from flowing into the housing . This is because when the grouting material flows into the housing at the time of grouting, the elastic member 160 can not perform its original role. As the sealing member 180, a material that can be inflated by moisture may be used. For example, bentonite or the like may be used.

The expansion / contraction cover 170 is provided on at least one of both ends of the coupler 100, and may be formed of a material having elasticity, that is, styrofoam, rubber, or the like. Needless to say, the elastic cover 170 may be formed of various materials.

Since the elastic cover 170 can provide some displacement due to the elasticity even after the grouting material is cured at the time of grouting reinforcement construction, the elastic cover 170 provides a pulling effect between the upper region and the lower region of the ground around the coupler 100 So that effective reinforcement is possible.

The shape of the elastic cover 170 may be variously formed. Also, in the present embodiment, the elastic cover 170 is provided only on one side of the coupler 100, but it is not limited thereto, and it may be provided on both sides or only on the opposite side.

3 and 4 show the shape of the elastic cover 170 according to the present embodiment in more detail. 3 and 4, in the present embodiment, the stretchable cover 170 includes a seat portion 172 and a head portion 174. As shown in FIG. A through hole 171 through which the second tensile portion 125 is inserted may be formed inside the elastic cover 170.

The seating part 172 is a component connected to the coupler 100 and has a width greater than the width of the housing 110 of the coupler 100 in the present embodiment, (See Fig. 2).

Also, at least a part of the head portion 174 is formed so as to have a reduced cross-sectional area as it goes outward to form a sloped surface, so that a uniform external force is applied to the head portion 174 as a whole.

A depression groove 173 having a recessed shape is formed in the periphery of the expansion and contraction cover 170 so that a hose for grouting for grouting can be passed therethrough. At this time, a plurality of depressed grooves 173 may be provided along the circumference of the elastic cover 70.

Figs. 5 to 11 show sequential grouting methods using such a grouting reinforcement device. Hereinafter, a grouting method using such a grouting reinforcement device will be described.

In the present embodiment, grouting reinforcement is performed on the circumference of the tunnel T as shown in FIG. 5, but it is needless to say that there is no limitation on the type of ground to which the grouting reinforcement method of the present invention is applied.

First, as shown in Figs. 5 and 6, a step of drilling a perforation hole 10 in the ground is performed. In this step, drilling is performed at a certain depth to the target ground where reinforcement is to be performed.

Particularly, in this embodiment, a plurality of perforation holes are radially drilled from the upper ground of the tunnel T toward the tunnel T side.

Next, as shown in FIGS. 7 to 9, a step of inserting a grouting reinforcement into the perforation hole 10 is performed. In this embodiment, the grouting reinforcement device may further include an anchor 200 and a spacer (not shown).

The anchor 200 is a component that is anchored to the ground to provide a fixing force to the entire grouting reinforcement device, and its forming position is not limited. Although the anchor 200 is installed at the bottom of the grouting device, the anchor 200 may be provided at various positions.

The spacer serves to support the grouting reinforcement device so as to be positioned at the center of the perforation hole 10.

In the present embodiment, the grouting reinforcing apparatus has a shape including a plurality of couplers 100a, 100b and 100c along the longitudinal direction. Accordingly, the first tensioning portions 120a and 120b of the couplers 100a and 100b located at the upper portion are connected to the second tensioning portions 125b and 125c of any of the couplers 100b and 100c positioned at the lower portion, , 125c.

After inserting the grouting reinforcement device into the perforation hole 10, at least a part of the grouting reinforcement device is anchored.

In this step, the grouting reinforcement device is stably fixed in the perforation hole 10. Particularly, in this embodiment, the fixing member 210 of the anchor 200 is extended and caught by the inner circumferential surface of the perforation hole 10, so that the entire grouting reinforcement device can be fixed inside the perforation hole 10 have.

The second tension portion 125a of the uppermost coupler 100a may be exposed to the outside of the perforation hole 10. After the step of anchoring at least a part of the grouting reinforcement device, 180 may be performed. The ground surface pressure plate 180 provides a supporting force to the ground in the course of subsequently stretching the tension bar.

In this state, the tensioning of the tension bar is performed. The moving portion 150 (see FIG. 2) of each of the couplers 100a, 100b, and 100c is moved to the second fixed portion (not shown) by tensioning the second tension portion 125a of the coupler 100a positioned at the uppermost position, 140, see Fig. 2).

Since the elastic member 160 (see FIG. 2) provided between the moving part 150 and the second fixing part 140 is compressed by this step, the movement bar 125 and the first tension part 120 A compressive force is generated.

Next, a step of injecting a grouting material into the perforation hole 10 is performed as shown in FIG. 11, and then the grouting material is cured.

As the grouting material inside the perforation hole 10 is cured, the positions of the couplers 100a, 100b, and 100c are fixed. However, since the elastic covers 170a, 170b, and 170c themselves have elasticity, Can be provided. 12, the present invention can be applied to the upper region (any one of R ₁ , R ₂ , and R ₃ ) and the lower regions (R ₂ , R ₃ , and R) of the ground around the couplers 100a, 100b, ₄ ), it is possible to provide a reinforcing effect superior to the conventional one.

The grouting reinforcement method according to the present invention has been described above. As described above, the grouting reinforcement device according to the present invention is capable of stably providing a vertical compressive force to the ground, and it is also possible to provide the coupler 100a, 100b, So that effective reinforcement can be performed.

13 shows a construction in the case where the through hole completely penetrates the ground. In this case, the grouting reinforcement device may be inserted into the through hole, and then the opposite side end may be anchored in such a manner that the grouting reinforcement device is inserted into the through hole. have.

That is, in this embodiment, since the first tension portion 120c of the coupler 100c provided at the lowermost portion protrudes to the opposite side of the through hole, another ground pressure plate 180b is installed and fastened. In this case, it is not necessary to provide a separate anchor.

In addition, various fastening means may be used in addition to the fastening method using the ground surface pressure plate 180b.

FIG. 14 is a view showing a structure of a coupler in a grouting reinforcement apparatus according to another embodiment of the present invention. FIG.

As shown in Fig. 14, another embodiment of the present invention is formed in the same manner as all of the above-described embodiment and all the components. However, in this embodiment, the elastic cover 170 is provided on both sides of the coupler 100. In other words, in the present embodiment, the expansion and contraction cover 170 can provide displacement in both the upper region direction and the lower region direction with respect to the coupler 100, thereby further enhancing the reinforcing effect.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

10: Perforation hole 100: Coupler
110: housing 120: first tension unit
125: second tension unit 130: first fixing unit
140: second fixing part 150: moving part
160: elastic member 170: stretchable cover
181: Through hole 172:
173: depression groove 174: tofu
180: ground support plate 190: sealing member
200: anchor 210:

Claims

At least two tension bars;
A coupler disposed between adjacent tensile bars such that a compressive force acts between adjacent tensile bars; And
And a flexible cover provided on at least one of both ends of the coupler and having elasticity,
Wherein the tension bar comprises:
A first tension unit coupled to a lower portion of the coupler; And
And a second tension unit coupled to an upper portion of the coupler,
The coupler
housing;
A first fixing part fixed to one side of the housing and connected to the first tension part;
A second fixing part fixed to the other side of the housing in a state spaced apart from the first fixing part and penetrated by the second tension part;
A moving part provided in the housing and coupled to the second tension part, the moving part being moved toward the second fixing part when the tension bar is tensioned; And
An elastic member for providing a compressive force between the moving part and the second fixing part;
The grouting reinforcement device comprising:

The method according to claim 1,
The above-
And a seating portion having a width larger than a width of the coupler and having a seating groove on which an end of the coupler is seated.

The method according to claim 1,
The above-
And a head portion formed so that at least a portion thereof decreases in cross-sectional area toward the outside.

The method according to claim 1,
And a grooved recess formed in the circumference of the elastic cover so as to allow the grouting hose to pass therethrough.

delete

The method according to claim 1,
Wherein the elastic member is compressed when one end is in contact with the moving part and the other end is in contact with the second fixing part and the moving part moves in the second fixing part direction.

The method according to claim 6,
Wherein the elastic member is formed so as to surround the periphery of the second tensile portion.

The method according to claim 1,
The coupler
Further comprising a sealing member provided on at least one of the first fixing portion and the second fixing portion to prevent fluid from flowing into the housing.

The method according to claim 1,
A plurality of couplers are provided,
Wherein the first tensioning portion of the upper positioned coupler is used as the second tensioning portion of the lower positioned coupler.

delete