KR20160027762A - Nailing apparatus of pressing type - Google Patents

Abstract

The present invention relates to a pressing type nailing apparatus installed inside a punching hole formed on the ground, comprising: a packer which selectively opens and closes the punching hole; an injection tube which injects a grouting liquid inside the punching hole; a reinforcing member mounted through penetration of the injection tube, wherein a top end is extended to an exterior of the punching hole, a bottom end extended to the bottom end of the punching hole, and which has sufficient strength to resist the stress of the ground; and a leakage prevention cap combined to the top end of the injection tube which prevents a leakage of the grouting liquid by sealing an area between the top end of the injection tube and the reinforcing member. The grouting liquid injected into the punching hole penetrates into the ground and reinforces the ground. According to the present invention, by using the leakage prevention cap, airtightness between the injection tube and the reinforcing member is able to be maintained such that leakage of the grouting liquid flowing in reverse from the injection tube is able to be prevented.

Description

[0001] The present invention relates to a nailing apparatus of pressing type,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grouting apparatus for slope reinforcement, and more particularly, to a pressurized nailing apparatus capable of reinforcing slopes by press grouting.

In general, various slope reinforcement methods are used for artificially incising slopes for construction such as large-scale land composition, road construction, and railroad construction, or for reinforcing natural slopes where there is a risk of collapse. Soil nailing method is used as one of the slope reinforcement methods, and gravity type soil nailing method and pressurized soil nailing method are included in such soil nailing method.

Since gravity type soil nailing method is applied to gravity type grouting, it takes a long time for cementation and repeated grouting works three times or more in order to compensate for the shrinkage phenomenon, so the workability is lowered, the construction time is lengthened, There is a problem in that it is not easy to confirm the state and quality control.

The pressurized soil nailing method is designed to solve the problems of this gravity type soil nailing method. The pressurized soil nailing method includes the steps of drilling a perforation hole at an appropriate position of the ground; Inserting a pressurized nailing device having a packer in a perforation hole; Closing the perforation hole by injecting air or foamed urethane chemical liquid into the packer through a charging hose connected to an external grouting solution supply source; And injecting a grouting solution into the perforation hole through the injection tube to perform pressurized grouting.

The injection pipe used in the pressurized soil nailing method is mainly composed of a steel pipe having a plurality of discharge holes formed along the longitudinal direction. When the injection pipe is made of a steel pipe, the strength of the steel pipe is combined with the strength of the grout, which is advantageous in that the reinforcement is very excellent. However, since the steel pipe is very expensive, there is a problem that the cost of the steel pipe is very expensive.

In order to solve this problem, as shown in FIG. 1, a packer 130 for opening and closing a perforation hole 120 formed in the ground 110; An injection pipe 140 having a hollow shape with upper and lower ends opened and installed to penetrate the packer 130; And a reinforcing member 150 installed to penetrate through the hollow 141 of the injection tube 140 have been introduced. The injection tube 140 is formed to communicate with the hollow 141 and has an injection port 143 connected to an external grouting solution supply source (not shown). 2, the grouting liquid flowing into the hollow 141 of the injection tube 140 through the injection port 143 flows through the space between the stiffener 150 and the inner surface of the hollow 141, Is injected into the perforation hole (120) through the open lower end of the pipe (140).

As the reinforcing material 150 is inserted into the hollow 141 of the injection tube 140, the cross-sectional area of the hollow 141 of the injection tube 140 in which the grouting liquid can flow is reduced, ) Of the grouting solution per unit time is reduced. 3, the pressurized nailing apparatus is configured such that the grouting solution of a part of the grouting solution flowing through the hollow 141 of the injection tube 140 flows backward and flows through the open top of the injection tube 141 There was a problem of leakage to the outside.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and provides a pressurized soaking apparatus having an improved structure for preventing a leakage of a grouting solution flowing backward from an injection pipe to the outside when a reinforcing material is installed to penetrate the injection pipe It has its purpose.

According to a preferred embodiment of the present invention, there is provided a pressurized nailing apparatus comprising: a packer inserted into a perforation hole formed in a ground and selectively opening and closing a perforation hole; An injection pipe installed to penetrate the packer and injecting a grouting solution into the hole; A reinforcement member penetrating the injection pipe, the upper end extending to the outside of the perforation hole, the lower end extending to the lower end of the perforation hole, and having a strength capable of resisting stress acting on the ground; And a leakage preventing cap coupled to an upper end of the injection tube and sealing the upper end of the injection tube and the reinforcement to prevent leakage of the grouting liquid through the upper end of the injection tube.

Preferably, a non-proof pipe inserted into the perforation hole so as to surround at least a part of the pressurized nailing apparatus and having a plurality of discharge holes formed on the outer circumferential surface thereof and having no strength capable of resisting stress acting on the ground The grouting solution injected into the non-proof pipe is discharged to the outside of the non-proof pipe, and the grouting solution injected into the non- And is discharged to the perforation hole through the hole.

Preferably, the leak-barrier cap is disposed on the inner circumferential surface and is provided with at least one O-ring which is in close contact with the reinforcement to maintain the airtightness between the upper end of the injection tube and the reinforcement.

Preferably, the leak-barrier cap has at least one retainer ring disposed on an inner peripheral surface thereof for press-supporting the reinforcing member.

Preferably, the injection tube has a male screw formed on an outer circumferential surface of an upper end thereof, and the leak-barrier cap has a female screw formed on an inner circumferential surface of a lower end so as to be screw-

Preferably, the injection tube comprises: a transfer channel formed inside the injection tube in the longitudinal direction; An insertion port formed at an upper end so as to communicate with the transfer path; An inlet formed at one side so as to communicate with the transfer passage; And a discharge port formed at the lower end so as to communicate with the transfer path; The grouting solution is introduced into the transfer passage through the inlet port and injected into the perforation hole through the outlet port.

More preferably, the reinforcing member is provided so as to penetrate through the insertion port, the transfer passage, and the discharge port, respectively, and the leakage preventing cap seals between the insertion port and the reinforcing member.

More preferably, the injection hose further comprises an inlet hose connecting the inlet of the grouting solution to the inlet.

Preferably, the air hose further comprises an air hose connecting the external air supply source and the packer.

Preferably, the reinforcing member is a reinforcing member.

Preferably, the non-proof pipe is a PVC pipe or a PE pipe.

The pressurized nailing apparatus according to the present invention can maintain the airtightness between the injection pipe and the reinforcing member by using the leakage preventing cap when the reinforcing member is installed to penetrate the injection pipe through which the grouting liquid can be injected into the perforation hole, It is possible to prevent the grouting solution flowing backward from the pipe from leaking to the outside.

1 is a sectional view of a conventional pressurized nailing apparatus;
FIG. 2 is a partial cross-sectional view showing an aspect of injecting a grouting solution into a perforation hole by an injection tube of the pressurized nailing apparatus of FIG. 1;
Fig. 3 is a partial cross-sectional view showing an aspect in which the grouting solution flows backward through the injection tube of the pressurized nailing apparatus of Fig. 1; Fig.
4 is a cross-sectional view of a pressurized nailing apparatus in accordance with a preferred embodiment of the present invention.
5 is an exploded perspective view of the pressurized nailing apparatus of FIG.
6 is a cross-sectional view of the injection tube of the pressurized nailing apparatus of Fig.
7A to 7C are a partial perspective view and partial cross-sectional view showing the installation structure of the leakage preventing cap and the injection tube of the pressurized nailing apparatus of FIG.
8A and 8B are a partial perspective view and a partial cross-sectional view showing a mounting structure of a reinforcing member of the pressurized nailing apparatus of FIG.
9A to 9C are flowcharts showing a slope reinforcement process using the pressurized nailing apparatus of FIG.
10 is a partial cross-sectional view showing the manner in which the grouting liquid is injected from the discharge port of the injection tube of FIG.
Fig. 11 is a partial cross-sectional view showing a state in which leakage of the grouting liquid is prevented by the leakage preventing cap of Fig. 9c. Fig.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

In the drawings, the size of each element or a specific part constituting the element is exaggerated, omitted or schematically shown for convenience and clarity of description. Therefore, the size of each component does not entirely reflect the actual size. In the following description, it is to be understood that the detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 4 is a cross-sectional view of a pressurized nailing apparatus according to a preferred embodiment of the present invention, FIG. 5 is an exploded perspective view of a pressurized nailing apparatus according to a preferred embodiment of the present invention, Fig.

FIG. 4 is a sectional view of a pressurized nailing apparatus according to a preferred embodiment of the present invention, FIG. 5 is an exploded perspective view of the pressurized nailing apparatus of FIG. 4, and FIG. 6 is a cross- .

4 to 6, a pressurized nailing apparatus 1 according to a preferred embodiment of the present invention includes a non-proof pipe 10 inserted into a perforation hole 3 formed in a ground 2; A caulking material (20) filled between the non-proof tube (10) and the perforation hole (3); A packer (30) inserted into the non-storm tube (10) and selectively opening and closing the non-storm tube (10); An injection pipe 40 installed to pass through the packer 30 and injecting a grouting solution into the non-proof pipe 10; A stiffener 50 installed to penetrate the injection pipe 40; An injection hose 60 for supplying a grouting solution to the injection pipe 40; An air hose 70 for supplying air to the packer 30; And a leakage preventing cap 80 which is coupled to the upper end of the injection tube 40 and seals between the upper end of the injection tube 40 and the stiffener 50.

The non-proof pipe 10 is inserted into the perforation hole 3 formed in the ground 2 and the space between the non-proof pipe 10 and the perforation hole 3 is filled with the caulking material 20. The non-proof pipe 10 prevents the perforation hole 3 from collapsing during the installation, facilitates the insertion of the reinforcing member 50 to be described later, and provides a space in which the grouting solution can be filled.

The non-proof pipe 10 is a pipe having no strength capable of resisting stress (shear stress, tensile force) acting on the ground 2, and is a pipe opposite to the above-mentioned pipe. The material of the non-proof pipe 10 is not particularly limited. For example, the non-proof pipe 10 may be a PVC pipe or a PE pipe.

The non-proof tube 10 has a length extending from the lower end of the perforation hole 3 to the inlet. The non-proof pipe 10 has a diameter slightly smaller than the diameter of the perforation hole 3 so as to be easily inserted into the perforation hole 3 and to prevent the perforation hole 3 from collapsing. This is because if the diameter of the non-proof pipe 10 is too small than the diameter of the perforation hole 3, it is unnecessary to drill a larger perforation hole 3, which is uneconomical and can not prevent collapse of the perforation hole 3 And it is difficult to insert the non-proof tube 10 into the perforation hole 3 when the diameter of the non-proof tube 10 is substantially the same as the diameter of the perforation hole 3. [

A gap 14 may be provided around the non-proof wall 10 at a predetermined interval such that the non-proof wall 10 is positioned at the center of the hole 3. [ Further, it is preferable that a cap is provided at the lower end of the non-proof pipe 10. The stopper may be provided at the lower end of the non-proof pipe 10 by screwing or bonding by an adhesive. Such a coupling method will be readily apparent to those skilled in the art.

In the non-proof pipe 10, a plurality of discharge holes 12 are formed. The discharge hole 12 is a hole through which the grouting solution injected into the non-bearing pipe 10 is discharged. The discharge hole 12 may be provided with a backflow prevention valve (not shown) for preventing the backflow of the grouting solution. The non-return valve prevents the grouting liquid discharged from the inside of the non-proof pipe (10) from flowing into the non-proof pipe (10) through the discharge hole (12). A conventional check valve can be used as the check valve. The check valve is widely known and can be easily purchased in the market. Therefore, the description thereof will be omitted here.

The caulking material 20 is filled in a space between the non-proof pipe 10 and the perforation hole 3 and prevents the grouting liquid from leaking to the outside through the space between the non-proof pipe 10 and the perforation hole 3 . The caulking material 20 preferably has a strength of 40 kgf / cm ² or more and has a short curing time so that sufficient effect can be exhibited even in leakage. For example, a quick cement can be used as the caulking material 20.

The packer (30) seals the non-storm tube (10) to enable press grouting. The packer 30 also has a diameter enough to allow the packer 30 to move up and down inside the non-storable tube 10 for multi-stage grouting while sealing the non-storable tube 10 so that pressurized grouting is possible. Respectively. The packer 30 includes a packer main body 31 for selectively opening and closing the non-proof tube 10, and a coupler 33 for coupling the packer main body 31 and the injection tube 40.

The packer main body 31 has a structure that can be inflated by air supplied by an air hose 70, which will be described later, and is formed of rubber or other elastic material. 6, a first through hole 31a through which the injection tube 40 is inserted is formed in the center of the packer main body 31, and an air hose 70 and a packer A second through hole 31b into which an air supply pipe 39 connecting the inner space of the main body 31 is inserted is formed. Here, the packer main body 31 is described as being inflated by the air supplied from the air hose 70. However, the present invention is not limited to this, and the inflator may be expanded by filling the foamed urethane or other filler. Hereinafter, the present invention will be described based on the case where the packer main body 31 is inflated by air.

The coupler 33 couples the packer body 31 with the injection tube 40. That is, the packer 30 and the injection tube 40 are integrated with each other by being coupled to the coupler 33. To this end, the coupler 33 includes a first coupler 35 provided on the upper portion of the packer main body 31 and a second coupler 37 provided on the lower portion of the packer main body 31.

The first coupler 35 is coupled to the upper portion of the packer main body 31 and the injection tube 40 to respectively couple the filler body 31 and the injection tube 40 thereto. 6, a first coupling hole 35a to which the injection tube 40 can be coupled is formed at the center of the first coupler 35, and an air supply pipe 39 is inserted between the central portion and the outer peripheral surface. A third through hole 35b is formed. The method of joining the first coupling hole 35a and the injection tube 40 is not particularly limited. For example, a female screw (not shown) is formed on the inner circumferential surface of the first coupling hole 35a, and a male screw (not shown) that can be screwed to the female screw of the first coupling hole 35a is formed on the outer circumferential surface of the injection tube 40 So that the first coupling hole 35a and the injection tube 40 can be screwed together.

The second coupler 37 is coupled to the lower portion of the packer main body 31 and the injection tube 40 to respectively couple the filler main body 31 and the injection tube 40 thereto. 6, a second coupling hole 37a to which the injection tube 40 is coupled may be formed at the center of the second coupler 37. As shown in FIG. The method of joining the second coupling hole 37a and the injection tube 40 is not particularly limited. For example, a female screw (not shown) is formed on the inner circumferential surface of the second fitting hole 37a, and a male screw (not shown) which can be screwed to the female screw of the second fitting hole 37a is formed on the outer circumferential surface of the injection tube 40 So that the second fitting hole 37a and the injection tube 40 can be screwed together.

The injection pipe 40 penetrates the packer 30 and injects the grouting solution supplied from an external grouting solution supply source into the non-proof pipe 10. 6, the injection tube 40 penetrates through the first through hole 31a of the packer body 31 and is screwed into the first engagement hole 35a and the second engagement hole 37a, respectively, Packer (30).

6, the injection pipe 40 is provided with a transfer path 41 formed in the longitudinal direction inside thereof, an insertion port 43 formed at the upper end so as to communicate with the transfer path 41, An inlet 45 formed to communicate with the flow path 41, and a discharge port 47 formed at the lower end to communicate with the transfer path 41.

The transfer path 41 is formed by penetrating the injection tube 40 in the longitudinal direction and transfers the grouting liquid introduced through the inlet 45 toward the discharge port 47. The insertion port 43 is formed at an upper end of the injection pipe 40 exposed to the upper side of the packer 30 and communicated with the transfer passage 41 to provide an entrance through which the reinforcing member 50 can be inserted or withdrawn. The inlet port 45 is opened to communicate with the transfer passage 41 on one side of the injection tube 40 exposed to the upper side of the packer 30 and connected to the injection hose 60 and the transfer passage 41 And guides the grouting liquid supplied by the injection hose (60) to the transfer passage (41). The discharge port 47 is opened to communicate with the transfer passage 41 at the lower end of the injection pipe 40 exposed to the lower side of the packer 30 and provides an entrance through which the stiffener 50 can be inserted or withdrawn, And the grouting solution transferred by the transfer path 41 is discharged to the inside by the non-proof pipe 10.

The reinforcing member (50) is inserted and installed inside the non-proof pipe (10). 4 and 5, the reinforcing member 50 is provided so as to penetrate the insertion port 43 of the injection pipe 40, the transfer path 41 and the discharge port 47, respectively, Extends to the outside of the perforation hole (3), and the lower end extends to the lower end of the perforation hole (3).

The reinforcing member 50 has a diameter smaller than that of the conveying passage 41 so that the grouting solution can be conveyed through the conveying passage 41 even when the reinforcing member 50 is inserted into the conveying passage 41. [ The reinforcing material 50 has a strength capable of storing the stress acting on the ground 2 on which the perforation hole 3 is formed. Therefore, the reinforcement 50 can resist the stress (shear stress, tensile stress, etc.) acting on the ground 2 alone or in cooperation with the hardened grout. As the reinforcing material 50, a reinforcing bar is preferably used, but not limited thereto.

The injection hose 60 connects an external grouting solution supply source with an inlet 45 of the injection pipe 40. Therefore, the grouting solution supplied from the grouting solution supply source may flow into the transfer passage 41 after passing through the injection hose 60 and the inlet 45 sequentially. The grouting solution flowing into the transfer passage 41 is injected into the non-proof pipe 10 through the discharge port 47. The grouting solution injected into the non-proof pipe 10 is injected into the non- After filling the inside of the perforation hole 3, it penetrates into the surrounding ground 2 and solidifies the surrounding ground 2.

The air hose (70) connects the external air supply source and the packer (30). More specifically, the air hose 70 connects the external supply source and the air supply pipe 39 of the packer 30, as shown in Fig. The air supply pipe 39 is installed to penetrate the third through hole 35b of the coupler 33. The upper end is connected to the air hose 70 and the lower end is connected to the second through hole 31b of the packer main body 31. [ And extends to the inner space of the packer main body 31. Thus, the air supplied from the external air supply source can flow from the internal space of the packer main body 31 after sequentially passing through the air hose 70 and the air supply pipe 39. The air introduced into the inner space of the packer main body 31 expands the packer main body 31 and the expanded packer main body 31 is brought into close contact with the inner peripheral surface of the non-powered pipe 10 to seal the non-powered pipe 10 .

The leakage preventing cap 80 is coupled to the upper end of the injection pipe 40 and seals between the upper end of the injection pipe 40 and the stiffener 50 to prevent the leakage of the grouting liquid through the upper end of the injection pipe 40 .

The pressurized nailing apparatus 1 according to the present invention is provided so that the reinforcing member 50 passes through the insertion port 43 of the injection pipe 40, the transfer path 41 and the discharge port 47, respectively. Therefore, the cross-sectional area of the conveying passage 41 is reduced by the cross-sectional area of the reinforcing member 50 into which the conveying passage 41 is inserted. Therefore, the grouting liquid feed amount per unit time of the feed path 41 is inevitably reduced as compared with the case where the reinforcing material 50 is not inserted into the feed path 41.

When the supply amount of the grouting solution per unit time by the injection hose 60 is larger than the feeding amount of the grouting solution per unit time of the transfer path 41, the grouting solution flowing into the transfer path 41 flows to the lower end of the injection pipe 40 It is not lowered to the discharge port 47 provided but is raised toward the insertion port 43 provided at the upper end. That is, when the amount of the grouting liquid injected into the conveying passage 41 is greater than the amount of the grouting liquid to which the conveying passage 41 can be conveyed, the grouting liquid flows backward and rises toward the insertion port 43.

The grouting solution flowing backward through the insertion port 43 is leaked to the outside of the injection pipe 40 through the space between the insertion port 43 and the reinforcing member 50 because the insertion port 43 is open. When the grouting liquid leaks through the space between the insertion port 43 and the stiffener 50, loss of the grouting solution occurs, and the leaked grouting liquid becomes cemented and the packer 30 can not be moved, It becomes difficult to carry out.

The pressurized nailing apparatus 1 according to the preferred embodiment of the present invention seals the space between the insertion port 43 of the injection tube 40 and the reinforcing member 50 and inserts the grouting liquid And a leakage preventing cap 80 for preventing leakage of the air. The specific structure of the leakage preventing cap 80 will be described later.

In the pressurized nailing apparatus 1 according to the preferred embodiment of the present invention, the non-proof pipe 10 is inserted into the perforation hole 3, (30) is inserted and installed. However, the present invention is not limited thereto, and the configuration of the non-proof pipe 10 may be omitted. That is, the packer 30 can be inserted directly into the perforation hole 3. The grouting solution injected directly into the perforation hole 3 penetrates into the ground 2 to reinforce the ground 2. The grouting solution injected into the perforation hole 3 can do. Hereinafter, for convenience of explanation, the present invention will be described based on the case where a non-proof pipe 10 is provided inside a perforation hole 3. [

7A to 7C are a partial perspective view and a partial cross-sectional view showing the installation structure of the leakage preventing cap and the injection tube of the pressurized nailing apparatus of FIG.

7A to 7C, the leakage preventing cap 80 includes an insertion hole 81 formed to communicate with the insertion port 43 to prevent the leakage of the grouting liquid through the insertion port 43 of the injection pipe 40 At least one O-ring 82 for holding the airtightness between the upper end of the injection tube 40 and the stiffener 50, at least one retainer ring 83 for pressingly supporting the stiffener 50, 80) to the injection tube (40). The shape and length of the leak-barrier cap 80 are not particularly limited. 7A, the leakage preventing cap 80 may have a cylindrical shape corresponding to the upper end of the injection tube 40, and the insertion hole 81 may be formed with an O-ring 82, A length suitable for disposing the female screw 83 and the female screw 84, and the like.

The insertion hole 81 is formed by penetrating the leakage preventing cap 80 in the longitudinal direction so that when the leakage preventing cap 80 is coupled to the upper end of the injection tube 40, And provides a passage through which the stiffener 50 can be inserted or withdrawn. The insertion hole 81 has a diameter equal to the diameter of the upper end of the injection tube 40 or slightly smaller than the upper end of the injection tube 40 so that the upper end of the injection tube 40 can be fitted into the insertion hole 81. An O-ring groove 85 for mounting the O-ring 82, a retainer ring groove 86 for mounting the retainer ring 83, a leakage preventing cap 80, And a female screw 84 for screwing the upper end thereof is provided.

The O-ring groove 85 is formed at a predetermined depth on the inner circumferential surface of the insertion hole 81 so that the O-ring 82 can be mounted. The number of the O-ring grooves 85 is not particularly limited. When two O-rings 82 are provided as shown in FIG. 7B, the O-ring grooves 85 correspond to the first O- And a second O-ring groove 85b. The first O-ring groove 85a and the second O-ring groove 85b are integrally formed with a female screw 84 provided at the lower end of the inner circumferential surface of the insertion hole 81, 81) of the inner circumferential surface.

The retainer ring groove 86 is formed at a predetermined depth on the inner peripheral surface of the insertion hole 81 so that the retainer ring 83 can be mounted. The number of the retainer ring grooves 86 is not particularly limited. When one retainer ring 83 is provided as shown in Fig. 7B, one retainer ring groove 86 is formed correspondingly. The position of the retainer ring groove 86 is not particularly limited and the retainer ring groove 86 may be formed between the female screw 84 and the upper end of the inner circumferential surface of the insertion hole 81. [

The O-ring 82 is attached to the O-ring groove 85 and is closely attached to the stiffener 50 inserted into the insertion hole 81 to seal the airtightness between the stiffener 50 and the insertion port 43 of the injection pipe 40 . As shown in FIG. 7A, the O-ring 82 is provided with two first O-rings 82a and a second O-ring 82b. The O-rings 82 can be closely attached to the stiffener 50 inserted into the insertion hole 81 Elastically deformable rubber or other synthetic resin material, but is not limited thereto. As shown in FIG. 7C, the first O-ring 82a and the second O-ring 82b are mounted in the first O-ring groove 85a and the second O-ring groove 85b, respectively.

The retainer ring 83 is mounted on the retainer ring groove 86 and presses and supports the reinforcing member 50 inserted into the insertion hole 81. The number and the material of the retainer ring 83 are not particularly limited. 7A, the retainer ring 83 is made of rubber or other synthetic resin material and a metal material, which are elastically deformable so as to be able to press and support the reinforcing member 50 inserted into the insertion hole 81 But it is not limited thereto. The O-ring 82 is formed of rubber or other synthetic resin to mainly maintain the airtightness between the reinforcing member 50 and the inlet port 43. The retainer ring 83 is formed by mixing rubber or other synthetic resin with a metal material And differs from the O-ring 82 in that it primarily performs the function of supporting the stiffener 50 inserted into the insertion hole 81. [ The retainer ring 83 can also be brought into close contact with the reinforcing member 50 inserted into the insertion hole 81 so as to maintain the airtightness between the reinforcing member 50 and the insertion port 43 of the injection pipe 40 .

The female screw 84 is formed at the lower end of the inner circumferential surface of the insertion hole 81 and screws the leakproof cap 80 and the upper end of the injection tube 40 into a screw. 7A, a male screw 49 capable of being screwed with the female screw 84 is formed at the upper end of the injection tube 40 in correspondence with the female screw 84 of the leakage preventing cap 80. As shown in FIG. 7C, the leak-barrier cap 80 can be coupled to the upper end of the injection tube 40 by screwing the female screw 84 and the male screw 49 together. Although the leakage preventing cap 80 and the upper end of the injection tube 40 are screwed to each other, the present invention is not limited thereto. The leakage preventing cap 80 and the injection tube 40 It is also possible to join the top.

8A and 8B are a partial perspective view and a partial cross-sectional view showing an installation structure of a reinforcing member of the pressurized nailing apparatus of FIG.

8A and 8B, the reinforcement 50 is installed to penetrate the leak-barrier cap 80 and the injection pipe 40 in a state where the leakage-preventing cap 80 is coupled to the upper end of the injection pipe 40 . More specifically, as shown in Fig. 8A, the reinforcing member 50 is installed so as to pass through the insertion hole 81, the insertion port 43, the transfer passage 41, and the discharge port 47. As shown in Fig. 8b, the first O-ring 82a and the second O-ring 82b are brought into close contact with the stiffener 50 to form a gap between the inlet of the injection port and the stiffener 50, The retainer ring 83 can pressurize and support the reinforcing member 50 while keeping the airtightness.

9A to 9C are flowcharts showing a slope reinforcement process using the pressurized nailing apparatus of FIG.

Hereinafter, a ground reinforcement method using the pressurized nailing apparatus 1 according to a preferred embodiment of the present invention will be described with reference to FIGS. 9A to 9C.

First, the perforation hole (3) is drilled in the ground (2). The perforation hole 3 may be perforated in an appropriate number depending on the state of the ground 2 to be reinforced.

Next, the non-proof pipe 10 is inserted into the perforation hole 3, and the space between the non-proof pipe 10 and the perforation hole 3 is filled with the caulking material 20. Proof pipe 10 is disposed at the center of the perforation hole 3 because the spacing member 14 is provided around the non-proof pipe 10 at predetermined intervals. The caulking material 20 seals a space between the non-proof pipe 10 and the perforation hole 3 to prevent the leakage of the grouting liquid through the space during the pressurized grouting described later.

Thereafter, the reinforcing member 50 is inserted into the non-proof pipe 10. The reinforcing member 50 extends from the lower end of the non-proof pipe 10 to the outside of the perforation hole 3. A gap material (not shown) may be provided around the reinforcing material 50 at predetermined intervals so that the reinforcing material 50 can be disposed at the center of the non-proof pipe 10, (50) may be disposed at the center of the non-storm tube (10).

Next, as shown in FIG. 9A, the injection tube 40 is inserted into the non-proof tube 10. More specifically, the injection pipe 40 is combined with the packer 30 and the leak-barrier cap 80 to form a stiffener 50 integrally with the filler 30 and the leak-barrier cap 80, And the leak-proof cap 80, as shown in Fig. Then, the O-ring 82 is brought into close contact with the stiffener 50, and the retainer ring 83 presses and supports the stiffener 50 (see Fig. 8B).

9B, the air supplied from the external air supply source is supplied to the inner space of the packer main body 31 through the air hose 70. Then, as shown in Fig. Then, the packer main body 31 is inflated by the air to seal the space between the packer main body 31 and the non-storm tube 10, thereby preventing the grouting solution from leaking through the space at the time of the press grouting described later.

Next, as shown in Fig. 9C, the grouting solution supplied from the external grouting solution supply source through the injection hose 60 is introduced into the injection tube 40. [ The grouting liquid flowing into the injection pipe 40 is injected into the non-proof pipe 10 through the inlet 45 and the transfer passage 41 and through the discharge port 47. The grouting solution injected into the non-proof pipe 10 is discharged to the perforation hole 3 through the discharge hole 12 of the non-proof pipe 10 and the grouting solution discharged to the perforation hole 3 is discharged to the ground (2) so as to reinforce the ground (2). Further, a non-return valve (not shown) may be installed inside the discharge hole 12 of the non- Therefore, the grouting solution discharged into the perforation hole 3 through the discharge hole 12 can be prevented from being discharged to the inside of the non-bearing pipe 10.

In the case of multi-stage grouting, the injection tube 40 is pulled upward in the direction of the perforation hole 3 using the injection hose 60 so as to be integral with the injection tube 40 and the injection tube 40 The packer 30 and the leak-barrier cap 80 are moved upward in the perforation hole 3, and then the grouting solution is further pressurized and injected into the non-proof pipe 10.

FIG. 10 is a partial cross-sectional view showing a state in which the grouting liquid is sprayed from the discharge port of the injection tube of FIG. 9c, and FIG. 11 is a partial cross-sectional view showing an aspect of preventing leakage of the grouting liquid by the leak-

10, when the grouting solution is injected into the non-proof tube 10 through the injection tube 40, the grouting solution passes through the discharge passage 47 of the injection tube 40 through the transfer passage 41, To the inside of the non-proof. 11, the grouting liquid of a part of the grouting liquid introduced into the injection pipe 40 is supplied to the grouting liquid by the reinforcing material 50, And can be raised to the inlet 43 of the injection port by flowing backward through the transfer passage 41. However, since the leakage preventing cap 80 is coupled to the upper end of the injection port, the airtightness between the reinforcing member 50 and the insertion port 43 of the injection pipe 40 is maintained by the O-ring 82 and the retainer ring 83 . Therefore, it is possible to prevent the grouting solution flowing backward to the insertion port 43 from leaking to the outside of the injection port through the insertion port 43.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

1: Pressurized nailing device 2: Ground
3: Perforation hole 10: Non-proof pipe
12: Exhaust hole 14: Spacer
20: caulking material 30: packer
31: Packer main body 31a: First through hole
31b: second through hole 33: coupler
35: first coupler 35a: first coupling hole
35b: third through hole 37: second coupler
37a: second coupling hole 39: air supply pipe
40: injection tube 41:
43: Inlet port 45: Inlet port
47: Outlet 49: Male thread
50: stiffener 60: injection hose
70: Air hose 80: Leak-proof cap
81: Insertion hole 82: O-ring
82a: First O-ring 82b: First O-ring
83: retainer ring 84: female thread
85: O-ring groove 85a: First O-ring groove
85b: second O-ring groove 86: retainer ring groove

Claims (11)

A packer inserted into the perforation hole formed in the ground and selectively opening and closing the perforation hole;
An injection pipe installed to penetrate the packer and injecting a grouting solution into the hole;
A stiffener installed to penetrate the injection pipe, an upper end extending to the outside of the perforation hole, a lower end extending to a lower end of the perforation hole, and a strength capable of resisting stress acting on the ground; And
And a leakage preventing cap coupled to an upper end of the injection pipe and sealing the gap between the upper end of the injection pipe and the reinforcing member to prevent leakage of the grouting liquid through the upper end of the injection pipe. . The method according to claim 1,
A non-proof pipe inserted into the perforation hole so as to surround at least a part of the pressurized nailing apparatus and having a plurality of exhaust holes formed on an outer circumferential surface thereof and having no strength capable of resisting stress acting on the ground; ≪ / RTI &
Wherein the packer is inserted into the non-storable tube and selectively opens and closes the non-storaged tube, the grouting solution is injected into the non-storable tube, and the grouting solution injected into the non- And the liquid is discharged to the perforation hole through the discharge hole. 3. The method according to claim 1 or 2,
Wherein the leakage preventing cap has at least one O-ring disposed on an inner circumferential surface thereof and closely attached to the reinforcing member to maintain airtightness between an upper end of the injection pipe and the reinforcing member. 3. The method according to claim 1 or 2,
Wherein the leakage preventing cap is disposed on an inner circumferential surface and has at least one retainer ring for pressingly supporting the reinforcing member. 3. The method according to claim 1 or 2,
Wherein the injection tube has a male screw formed on an outer peripheral surface of an upper end thereof,
Wherein the leak-barrier cap comprises a female screw formed on an inner circumferential surface of a lower end so as to be capable of screwing with the male screw. 3. The method according to claim 1 or 2,
Wherein the injection tube comprises:
A transfer path formed in the longitudinal direction of the injection tube;
An insertion port formed at an upper end to communicate with the transfer path;
An inlet formed at one side to communicate with the transfer passage; And
And an outlet formed at the lower end so as to communicate with the transfer passage;
Wherein the grouting solution is introduced into the feed channel through the inlet and injected into the perforation hole through the outlet. The method according to claim 6,
Wherein the reinforcing member is provided so as to pass through the insertion port, the conveyance passage, and the discharge port,
Wherein the leak-barrier cap seals between the insertion port and the reinforcing member. The method according to claim 6,
Further comprising an inlet hose connecting the inlet of the grouting solution to the inlet and the inlet hose. The method according to claim 1,
Further comprising an air hose connecting the external air source and the packer. ≪ RTI ID = 0.0 > 8. < / RTI > 3. The method according to claim 1 or 2,
Wherein the reinforcing member is a reinforcing bar. 3. The method of claim 2,
Wherein the non-proof pipe is a PVC pipe or a PE pipe.

Images