KR101805741B1 - Extending and pressuring soil nailing apparatus - Google Patents

Abstract

The present invention relates to an extending and pressuring type nailing apparatus, and a nailing construction method thereof. According to the present invention, in a nailing apparatus (10) comprising a reinforcement material (100) inserted into a drilling hole (H) to reinforce a cut slope and a head extension part (200) installed in a front end of the reinforcement material, the reinforcement material (100) is lengthily formed to be inserted into the drilling hole (H), a thread (110) is formed on the outer circumferential surface of the reinforcement material (100), the head extension part (200) has a cylindrical pressing member (210) formed in a central part of the head extension part (200) to allow the reinforcement material (100) to be penetrated therethrough, first and second pressing cams (220, 230) are screw-coupled to the reinforcement material (100) in front and rear ends of the pressing member (210), and conical attachment parts (221, 231) of the first and second pressing cams (220, 230) are vertically pressed. Thus, the pressing member (210) is extended towards a side surface to press the inner surface of the drilling hole (H). A packer part (300) is installed in the rear end of the reinforcement material (100) to grout concrete (C) injected inside the drilling hole (H) by air pressure and a finishing part (400) is installed in a rear end of the packer part (300) to be closely adhered to the slope. Accordingly, pressing by mechanical extension in the front end and pressing in the central part by grouting are doubly applied, thereby minimizing stability of the ground.

Description

[0001] EXTENDING AND PRESSURING SOIL NAILING APPARATUS [0002]

The present invention relates to a nailing apparatus, and more particularly, to an expandable pressurized nailing apparatus in which a reinforcing member is inserted into a drilled hole for grooving and curing to integrate the soil and the nail in order to reinforce the cut slope.

Nailing method is a method used for earthwork or pile construction to reinforce sloped slopes. It inserts stiffeners at regular intervals without prestressing to increase the overall shear strength of the ground itself, Which is a top-down type of cut-to-face reinforcement.

Specifically, the soil stability is increased based on the resistance against the friction force, the shear stress and the bending moment between the soil and the reinforcement. As for the method of inserting the reinforcement, the method of inserting the excavation hole in advance is mainly used. As a reinforcing material, there are plastic rods and glass fibers, but mainly steel products are used. In the order of construction, after the excavation, nailing device insertion, grouting, curing and fixing of nails are carried out.

The conventional nailing method for reinforcing such cut slopes can be roughly divided into gravity type, pressure type and expansion type nailing methods. The gravity type nailing method is a method of grouting through the injection hose after inserting the reinforcing material into the inside of the excavation hole. This method has a problem that the ground stability is relatively weak and is not good in appearance, and it is difficult to use it at a slope failure angle or more. In addition, the pressure type nailing method is a method in which the back end is closed by inserting a reinforcing material to improve the pulling force of grouting by the air pressure, but still the ground stability is not secured in a part of the excavation surface, There is a problem that the slope state becomes weak because it is hard to grout immediately due to physical and climatic conditions. In addition, the expansion type nailing method is a method in which the inside of the excavation hole is closely contacted through the mechanical expansion at the tip of the reinforcing member, and the excavation surface can not be pressed as a whole, and the cost is high.

Accordingly, it is an object of the present invention to provide a nailing apparatus and a nailing method using the nailing apparatus which are capable of performing grouting immediately after closing the rear end of a drilling hole while at the same time taking advantage of the above-described pressure type and expansion type nailing methods, .

In order to solve the above problems, the present invention provides an expandable pressurized nailing apparatus in which ground stability is maximized by biasing by mechanical expansion at the tip end and pressurization at the center by compression grouting, It is an object of the present invention to provide a ring construction method.

Also, it is an object of the present invention to provide an expandable pressurized nailing apparatus in which grouting is possible immediately after inserting a packer portion into a drilling hole, thereby shortening a construction period and a nailing method using the same.

Further, it is an object of the present invention to provide an expandable pressurized nailing apparatus which can be applied without limitation to a soil environment, has a low degree of difficulty and is low in construction cost, and a nailing method using the same.

In order to accomplish the above object, the present invention provides an expandable pressurized nailing apparatus comprising a reinforcing member inserted into a drilling hole for reinforcing a cut slope, and a head extending portion provided at a tip of the reinforcing member, The reinforcing member 100 is formed to be long enough to be inserted into the excavation hole H and the screw 110 is formed on the outer circumferential surface of the reinforcing member 100, The extension part 200 is provided with a cylindrical pressing member 210 through which the reinforcing member 100 passes, and the first pressing cam 220 and the second pressing part 210 are respectively provided at the front and rear ends of the pressing member 210, The cam 230 is screwed to the stiffener 100 so that the conical contact portions 221 and 231 of the first and second pressing cams 220 and 230 are pressed in the vertical direction, (210) expands laterally to press the inner surface of the excavation hole (H), and the rear end of the stiffener (100) The concrete packed in the excavating hole H is grouted by the air pressure and the closing part 400 is provided at the rear end of the packer part 300 so as to be in close contact with the slope A paper binding part 222 is integrally formed at a front end of the first pressing cam 220 of the head expanding part 200. A hollow 222a is formed in the paper binding part 222, The wedge piece 222b is formed on both ends of the leading end of the ground binding part 222 and is fixedly held in the excavation hole H so that the pressing member of the head extending part 200 A plurality of ring-shaped groove portions 212 are formed on the outer circumferential surface of the pressing piece 211 and a plurality of ring-shaped groove portions 212 are formed in a part of the ring- The packer unit 300 includes a through hole 310a at the center so as to be closely attached to the nut member 120 threadedly engaged with the stiffener 100, And a packer reinforcing member 320 is provided on the upper part of the packer 310 so that the packer 310 is inserted and fixed in the excavation hole H, A first milk injection hole 311a is formed on both sides of the through hole 310a in a cylindrical body 311 of a cylindrical shape and a packer blade 312 extending upward outward is formed at the edge of the body 311, And the second milk injection hole 311a is formed on both sides of the through hole 320a formed in the center of the packing reinforcing member 320 so that the first milk injection hole 311a of the packer 310 is center- A plurality of auxiliary holes 311b are formed at the lower end of the packer 310 along with the first milk injection hole 311a at the periphery of the through hole 310a, A resilient rubber plate 410 which is directly contacted with the slope and a resilient rubber plate 410 which contacts the upper surface of the resilient rubber plate 410, The metal plate 420 is formed in a rectangular shape and a hexagonal nut piece 421 is formed integrally with the hexagonal nut piece 421 at the center thereof to be screwed to the reinforcing member 100, And the insertion holes 422 are formed in the periphery of the metal plate 420. The insertion holes 422 are formed in the periphery of the metal plate 420 so that the first and second milk injection holes 311a and 320b And the center line are aligned with each other.

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The packer 310 and the packer reinforcing member 320 are both made of elastic rubber and the elastic strength of the packer 310 is higher than that of the packer reinforcing member 320.

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With the above-described solution, there is an advantage that the pressurization by the mechanical expansion at the tip end and the pressurization at the center portion by the compression grouting are applied double, and the ground stability is maximized. That is, the soil and the nailing can be completely integrated by pressing evenly without a portion missing in the excavation surface.

The grouting is possible immediately after inserting the packer part into the excavation hole, thereby shortening the construction period and preventing slope collapse due to prolonged excavation condition.

There is an advantage that the excavated surface is finishing after the grouting work and is visually beautiful.

It is possible to apply it without limitation to the soil environment, the difficulty of construction is not high, and the cost is relatively low, which is advantageous in that the workability is excellent.

FIG. 1 is a view showing a state in which the expandable pressurized nailing apparatus according to an embodiment of the present invention is inserted into a drill hole and used. FIG.
2 is a perspective view of an expandable pressurized nailing apparatus according to an embodiment of the present invention.
3 is an enlarged view of a head expanding portion of the expandable pressurized nailing apparatus of the present invention.
FIG. 4 is a cross-sectional view of a head expanding portion of the expandable pressurized nailing apparatus of the present invention.
5 is an exploded perspective view of a packer portion and a finishing portion of the expandable pressurized nailing apparatus of the present invention.
6 is a perspective view and a bottom perspective view of the packer of the expandable pressurized nailing apparatus of the present invention.
7 is a perspective view of a packer reinforcing member of the expandable pressurized nailing apparatus of the present invention.
FIG. 8 is a perspective view of a finishing portion of the expandable pressurized nailing apparatus of the present invention. FIG.
9 is a view showing a cross section of a packer part and a finishing part of the expandable pressurized nailing device of the present invention.
FIG. 10 is a view showing a packer part and a finishing part of the expandable pressurized nailing apparatus according to an embodiment of the present invention inserted into a drilling hole.
11 is a flowchart showing a nailing method of the present invention.

The expandable pressurized nailing apparatus according to the present invention and the nail ring construction method using the same can be variously applied, and the most preferred embodiments will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an expandable pressurized nailing apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view of an expandable pressurized nail apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the expandable pressurized nailing apparatus of the present invention includes a nailing apparatus 10 inserted into a plurality of drilling holes H formed on a slope to reinforce a cut slope, (100) and a head expanding part (200) provided at the tip of the reinforcing material.

The stiffener 100 is formed to be long enough to be inserted into the excavation hole H and a thread 110 is formed on the outer circumferential surface of the stiffener 100. Preferably, the stiffener 100 can be used by cutting a deformed reinforcing bar. Therefore, it is easy to assemble and transport other members to be described later on the reinforcement member 100, and the manufacturing cost and time can be saved by using the manufactured reinforcing bars.

The head extension 200 includes a cylindrical pressing member 210 through which the reinforcing member 100 passes, and a first pressing cam 220 is provided at the front and rear ends of the pressing member 210, And the second pressurizing cam 230 are screwed into the reinforcing member 100.

FIG. 3 is a view showing an enlarged view of the head expanding part 200 of the expandable pressurized nailing device of the present invention, and FIG. 4 is a view showing a cross section of the head expanding part 200 of the expandable pressurized nailing device of the present invention.

Conical contact portions 221 and 231 are formed at portions where the first pressing cam 220 and the second pressing cam 230 are in contact with the pressing member 210, 221) 231 presses the pressing member 210 in the vertical direction toward the pressing member 210 so that the pressing member 210 can expand to the side and press the inner surface of the drilling hole H.

Specifically, the first pressurizing cam 220 of the head expanding part 200 is integrally formed with a front surface binding part 222 at the front end, and a hollow 222a is formed inside the front surface binding part 222 The reinforcing member 100 can be penetrated and the length of the nailing apparatus can be freely adjusted corresponding to the depth of the drilling hole H.

The wedge piece 222b is formed on both ends of the front face of the paper binding part 222 so that the nailing device is coupled and supported inside the excavation hole H so that the head extending part 200 can be more stably expanded .

The pressing member 210 may be formed as a plurality of pressing pieces 211 and may be laterally expanded when the first pressing cam 220 and the second pressing cam 230 are pressed in the vertical direction. A plurality of ring-shaped grooves 212 may be formed on the outer circumferential surface of the pressing piece 211, and a release-preventing cord 213 may be provided on a part of the ring-shaped groove 212. The first pressing cam 220 and the second pressing cam 230 may be provided with one release preventing strap 213 for each of the five ring groove portions 212 so that the pressing member 210 is rotated by the first pressing cam 220 and the second pressing cam 230, It is possible to prevent the pressure piece 211 from escaping due to excessive pressure.

As described above, since the head expanding portion 200 is provided at the tip of the stiffener 100, there is an advantage that the lowermost end of the drilling hole H can be easily tightly pressed.

In addition, a packing unit 300 is provided at the rear end of the reinforcing member 100 so that the concrete C injected into the excavation hole H can be grouted by air pressure. As a result, the pressurization by the mechanical expansion at the tip end and the pressurization at the center portion by the compression grouting are doubly applied, so that the ground stability can be maximized.

In addition, since the finishing portion 400 is provided at the rear end of the packer unit 300 so as to be in close contact with the slope, the excavated surface is finished after the grouting operation and is visually beautiful.

5 is an exploded perspective view of the packer unit 300 and the finishing unit 400 of the expandable pressurized nailing apparatus of the present invention.

The packer unit 300 includes a packer 310 and a packer reinforcing member 320 with respect to a front end or a lower end of the pack 200. The pack unit 300 includes an elastic rubber plate 410 and a metal plate 420.

6 (a) and 6 (b) are a perspective view and a bottom perspective view of the packer 310 of the expandable pressurized nailing apparatus of the present invention, respectively. FIG. 7 is a perspective view of the packer reinforcing member 320 8 is a perspective view of a finishing portion 400 of the expandable pressurized nailing apparatus of the present invention. FIG. 9 is a perspective view of the packed portion 300 of the expandable pressurized nailing apparatus of this invention, (400). ≪ / RTI >

Referring to FIG. 3, a through hole 310a may be formed at the center of the packer 310 so as to be in close contact with the nut member 120 screwed to the reinforcing member 100. That is, the nut member 120 can be coupled and transported along the stiffener 100 by being screwed with the stiffener 100, and the lower end of the packer 310 is supported by the nut member 120, Can be supported by the nut member (120).

The through hole 310a is formed in the packing body 310 of the cylindrical shape of the packer 310 so that the reinforcing member 100 can pass through the through hole 310a. A concrete hole or the like can be injected into the excavation hole H by the injection hose and a packer blade 312 extending upward outward is integrally formed at the edge of the packer body 311 So that the packer 310 can be easily inserted without being scratched or damaged when inserting the packer 310 into the drilling hole H while being prevented from departing in the reverse direction and thereafter providing advantages in ease of construction and stability in grouting by air pressure have.

Further, it is preferable that a step portion 311-1 is formed on the outer circumferential surface of the packer body 311, which can increase the easiness of insertion into the drilling hole H.

It is preferable that a plurality of auxiliary holes 311b are formed at the lower end of the packer body 311 in addition to the through hole 310a and the first milk injection hole 311a. There is an advantage to improve.

The packer reinforcement member 320 is provided to abut on the upper portion of the packer 310 so that the packer 310 is more stably inserted into the excavation hole H. A through hole 320a is formed at the center of the packer reinforcing member 320 so that the reinforcing member 100 can pass through and the first milk injection of the packer 310 is inserted into both sides of the through hole 320a. The second milk injection hole 320b may be formed so that the center line of the second milk injection hole 311a is aligned with the center line. Therefore, concrete can be injected by inserting the injection hose through the first and second milk injection holes 311a and 320b.

Here, a detailed description of the diameter of the packer 310 and the packing reinforcing member 320 will be given later.

The finishing unit 400 may include a resilient rubber plate 410 that directly contacts the slope and a metal plate 420 that is screwed to the resilient member 100 so as to be brought into contact with the upper portion of the resilient rubber plate 410. Specifically, it is preferable that the elastic rubber plate 410 and the metal plate 420 are formed in the same flat rectangular shape. Thereby, the adhesion force to the slope of the finishing portion 400 is increased, and there is an advantage of providing an aesthetical sense of elevation when viewed from the outside.

A hexagon nut piece 421 is integrally formed at the center of the metal plate 420 and is screwed to the stiffener 100. An insertion hole 422 is formed around the hexagon nut piece 421 .

The insertion hole 422 may be formed on both sides of the hexagonal nut piece 421 so as to be centerline with the first and second milk injection holes 311a and 320b. Of course, the number of the insertion holes 422 is not limited to a certain number, and a plurality of insertion holes 422 may be formed around the hexagonal nut piece 421. For example, four insertion holes 422 may be formed, and the center line may be aligned with the first and second milk injection holes 311a and 320b each time the metal plate 420 is rotated by 90 degrees. Accordingly, the injection hose is inserted through the first and second milk injection holes 311a and 320b and the insertion hole 422, so that the concrete can be injected instantaneously.

The packer 310 and the packer reinforcing member 320 are both made of elastic rubber and the elastic strength of the packer 310 is higher than the elastic strength of the packer reinforcing member 320, The metal plate 420 is preferably formed of an iron material.

The packer 310 is easily inserted into the excavation hole H by varying the elastic strength of the packer 310 and the packer reinforcing member 320 so that the packer reinforcing member 320 is secondarily The packer 310 can be more stably fixed while being inserted.

FIG. 10 is a view illustrating a packer unit 300 and a finishing unit 400 of the expandable pressurized nailing apparatus according to an embodiment of the present invention inserted into a drill hole.

The diameter R1 of the packer body 311 of the packer 310 is preferably smaller than the diameter R2 of the drilling hole H. [ On the other hand, it is preferable that the length R3 of the finishing part 400 is two times or more larger than the diameter R2 of the drilling hole H.

For example, when the diameter R2 of the excavation hole H is 105 mm, the diameter R1 of the packer body 311 is 95 to 100 mm, and the diameter of the packer blade 312 is the diameter of the excavation hole H, Is preferably in the range of 100 to 105 mm so as to be substantially equal to the diameter (R2). The diameter of the packing reinforcement member 320 is preferably 105 to 110 mm so as to be equal to or slightly larger than the diameter R2 of the drilling hole H and the length R3 of the finishing portion 400 is 200 to 300 mm .

By forming the packer 310, the diameter of the packing reinforcement member 320 and the length of the finishing portion 400 relatively differently, the packer 310 can be easily inserted into the drilling hole H And the packer reinforcement member 320 is secondarily inserted, so that the packer 310 can be more stably fixed.

By providing the packer unit 300, there is an advantage that the pressurization by the mechanical expansion at the front end and the pressurization at the center by the compression grouting are applied double, and the ground stability is maximized. That is, the soil and the nailing can be completely integrated by pressing evenly without a portion missing in the excavation surface.

Further, grouting is possible immediately after inserting the packer part into the excavation hole H, which shortens the construction period and prevents slope collapse due to prolonged excavation.

Further, since the finishing portion 400 is provided, there is an advantage that the excavated surface is finished after the grouting operation and is visually beautiful.

The nailing method using the expandable pressurized nailing apparatus of the present invention is a nailing method for reinforcing the slopes cut out by using the nailing apparatus 10. In order to insert the nailing apparatus 10 into the cut slopes, A drilling hole construction step (SlOO) for boring by a diameter; A slope reinforcement step (S200) of reinforcing slopes using the expandable pressurized nailing apparatus (10) on the excavation hole (H); And an excavation hole finishing step S300 for embedding the excavation hole H in a state where the nailing apparatus 10 is inserted into the reinforced slope.

11 is a flowchart showing a nailing method of the present invention.

Here, the slope reinforcement step (S200) may include a nailing device inserting step (S210) of inserting the expandable pressurized nailing apparatus (10) into the excavation hole (H) of the cut slope; (S320) of expanding the head extension of the expandable pressurized nailing apparatus (10) to press the inner surface of the excavation hole (H); A concrete injection step (S330) of filling a predetermined amount of concrete into the excavation hole (H); A grouting step (S340) of applying an air pressure to a portion of the inside of the excavation hole (H) filled with concrete to expand the concrete to press the inner surface of the excavation hole (H); And a grouting curing step (S350) in which the expanded concrete is cured for a predetermined time under predetermined conditions.

By using the expanding type pressing nailing apparatus 10, it is possible to apply the nailing system without limitation to the soil environment, the difficulty of construction is not high, the complicated and expensive equipment is not required, and the construction cost is relatively low, There is an advantage to doing.

In the foregoing, an expandable pressurized nailing apparatus according to the present invention and a nailing method using the same have been described. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

It is to be understood, therefore, that the embodiments described above are in all respects illustrative and not restrictive.

100: stiffener 110: thread
200: head expanding part 210: pressing member
220: first pressing cam 230: second pressing cam
300: Packer part 310: Packer
320: Packer reinforcing member 400: Finishing portion
S100: Excavation hole construction step S200: Slope reinforcement step
S300: Excavation Ball Closing Phase

Claims (10)

A nailing apparatus (10) comprising a reinforcing member (100) inserted into a drilling hole (H) for reinforcing a cut slope and a head extending portion (200) provided at a tip of the reinforcing member,
The reinforcing member 100 is formed to be long enough to be inserted into the excavation hole H, a thread 110 is formed on the outer circumferential surface of the reinforcing member 100,
The head expanding part 200 is provided with a cylindrical pressing member 210 through which the reinforcing member 100 passes, and the first pressing cam 220 and the second pressing cam 220 are respectively provided at the front and rear ends of the pressing member 210, The two pressing cams 230 are screwed to the reinforcing member 100 so that the conical pressing parts 221 and 231 of the first pressing cam 220 and the second pressing cam 230 are pressed in the vertical direction, The pressing member 210 is laterally expanded to press the inner surface of the drilling hole H,
A packing unit 300 is provided at the rear end of the reinforcing member 100 so that the concrete C injected into the excavation hole H is grouted by the air pressure and the rear end of the packing unit 300 is brought into close contact with the slope A finishing unit 400 is provided,
The first presser cam 220 of the head expander 200 is integrally formed with the front surface binding portion 222 at the front end thereof and a hollow 222a is formed inside the front surface binding portion 222, The wedge piece 222b is formed on both ends of the leading end of the paper binding part 222 and is coupled and supported in the excavation hole H and the pressing member 210 of the head extending part 200, A plurality of ring-shaped groove portions 212 are formed on the outer circumferential surface of the pressing piece 211 and a separation prevention cord 213 is formed in a part of the ring- Respectively,
The packer unit 300 includes a packer 310 having a through hole 310a formed at a central portion thereof to closely contact the nut member 120 threadedly connected to the reinforcing member 100, H of the packer 310 to be fixed to the upper portion of the packer 310,
A first milk injection hole 311a is formed on both sides of the through hole 310a in the cylindrical body 311 of the packing body 310 and the first milk injection hole 311a is formed on the edge of the packing body 311 upwardly And the center of the through hole 320a formed in the central portion of the packer reinforcing member 320 is aligned with the center line of the first milk injection hole 311a of the packer 310 A second milk injection hole 320b is formed and a plurality of auxiliary holes 311b are formed at the lower end of the packer 310 along with the first milk injection hole 311a around the through hole 310a ,
The finishing unit 400 includes an elastic rubber plate 410 that directly contacts the slope and a metal plate 420 that is screwed with the reinforcing member 100 to be brought into contact with the upper portion of the elastic rubber plate 410, 420 are formed in a rectangular shape and a hexagonal nut piece 421 is integrally formed at the central portion thereof and is screwed to the stiffener 100. An insertion hole 422 is formed around the hexagonal nut piece 421, The insertion holes 422 are formed so that the centers of the first and second injection holes 311a and 320b coincide with each other when the metal plate 420 is rotated 90 degrees. Ring device.
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Wherein the packer (310) and the packer reinforcing member (320) are both made of elastic rubber, and the elastic strength of the packer (310) is higher than the elastic strength of the packer reinforcing member (320).
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