KR20090010544A - Removable type soil nailing apparatus - Google Patents

Abstract

A removable type soil nailing apparatus is provided to apply bearing capacity to a slope at sheathing work, and to recycle afterward by separating a packer and a prefabricated steel pipe piece in order and removing from a perforated hole after completing construction work. A removable type soil nailing apparatus comprises a prefabricated soil nail steel pipe(10) formed in a cylindrical body by assembling many unit pieces, an unit piece assembly member(30) assembling many unit pieces forming the cylindrical body of the prefabricated soil nail steel pipe, a pressure packer(20) inserted to the cylindrical body of the prefabricated soil nail steel pipe in the longitudinal direction and provided with a filler injection nozzle at one end to vary a radius by controlling internal pressure through, and a pressure control member(40) connected to the filler injection nozzle of the pressure packer and controlling the pressure of the pressure packer by injecting filler to the inside of the pressure packer or opening a valve.

Description

Removable type soil nailing device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil nailing device reusable to earth wall for building foundation earthquake, and more particularly, to form a prefabricated steel pipe piece having a diameter adjustment of a soil nail used for earth wall and slope stabilization method. And by inserting the rubber or elastic packer (Packer) that can adjust the resistance by pressure or pressure reduction inside the prefabricated steel pipe pieces to install inside the perforation hole to give support to the slope during the construction of the earthquake, and the packer and The present invention relates to a removable saw nailing device which can be recycled later by separating prefabricated steel pipe pieces and removing them from a hole.

In general, slopes installed along with land construction, roads, railways, etc. for building construction are susceptible to natural disasters, which can result in the loss of valuable lives and the loss of houses. It is carried out.

Soil Nailing, which is most widely used in earth wall installation or slope stabilization, is a method that improves the stability of artificial slopes by natural slopes or excavation and resists tensile stress, shear stress and bending moment. It is a method of reinforcing material (Re-Bar), that is, by inserting nails at relatively close intervals in the ground to increase the overall shear resistance and activity resistance of the ground to secure slope stability and to suppress the displacement of the ground.

Conventional soil nailing methods include a pressureless (gravity type) and a pressure type, Figure 1 and Figure 2 shows a conceptual diagram of the pressureless soil nailing method and the pressure soil nailing method, respectively.

The pressureless nail nailing method is a grouting body for fixing a drill hole and a nail by inserting a nail (3) and a spacer (2) in the form of steel rods (steel pipes and deformed rebars) to earth and sand. It is a method of forming a conventional retaining wall by integrating a reinforced earth plate (1) by forming a milk) and shotcrete on the front surface thereof, and distinguishing it from the back ground that is not reinforced. However, this pressureless nail nailing method has a long solidification time, and because the grouting operation is repeatedly performed about 2 to 5 times to compensate for the shrinkage phenomenon, there is a problem in that the construction period is long due to the poor construction.

On the other hand, the pressurized soil nailing method, a method of applying pressure grouting to the inlet of the drilling hole to improve the frictional resistance of the main surface of the surrounding ground grouting body by pressure grouting and the bending rigidity through the pipe-shaped construction of the nail body As the urethane and cement milk injection, the packing member 4 is installed and grouting is carried out at a predetermined pressure (6 to 15 kg / cm 2) in the drilling hole. It should be noted that the application of the injection pressure according to the characteristics, there is a risk of disturbing the ground rather than the limit injection pressure, it was difficult to maintain the target pressure until the grouting body is completely solidified.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to form a saw nail to be used in earth wall and slope stabilization method as a prefabricated steel pipe piece freely adjustable in diameter and by volume control by pressure or pressure reduction. By inserting a packer that can adjust the resistance inside the prefabricated steel pipe piece and install it inside the perforation hole, it is possible to give support to the slope during construction or slope stabilization of the earth wall, and prefabricated steel pipe and packer at the completion of construction The present invention provides a removable saw nailing device capable of being recycled by being separated and removed from a drilling hole.

A feature of the present invention for achieving the above object, in the soil nailing device for earth wall or slope stabilization work, a plurality of unit pieces having a length corresponding to the soil nail used for earth wall or slope stabilization construction is assembled Prefabricated soy nail steel pipe to form a cylindrical body; A unit piece assembly member for assembling a plurality of unit pieces constituting the cylindrical body of the prefabricated nail nail steel pipe; A pressurized packer inserted into the cylindrical body of the prefabricated nail nail steel in a longitudinal direction, and having a filler injection tube at one end thereof, the pressure packer of which a radius is varied by adjusting an internal pressure through the filler injection tube; A removable saw connected to the filler injection tube of the pressurized packer through an injection valve and including a pressure regulating member for injecting the filler into the pressurized packer or opening the injection valve to adjust the pressure of the pressurized packer. Nailing device.

In the removable soil nailing apparatus according to the present invention, the unit piece assembly member may be composed of an elastic body, preferably elastically tightenable springs, and the prefabricated nailnail steel pipe may be formed with respect to each unit piece. It may be to form a plurality of unit pieces are folded or spaced apart by forming the assembly member insertion hole in each of the lower end and by connecting the unit piece assembly member through the assembly member insertion hole.

In addition, in the removable soil nailing device according to the present invention, each unit piece constituting the prefabricated nail nail steel pipe is made of a plate shape of the length corresponding to the nail nail and each unit piece has a curved surface transverse to the longitudinal direction It is preferable to be configured to have a cylindrical body having a constant radius of curvature when each unit piece is assembled by the unit piece assembly member.

In addition, in the removable saw nailing device according to the present invention, the pressure regulating member is an injection valve directly connected to the filler injection tube of the pressure packer; A pressure gauge for measuring and indicating a hydraulic pressure and a pressure for injecting a filler into the pressurized packer through the injection valve; It may be composed of a check valve connected between the pressure gauge and the oil pressure.

In addition, in the removable soil nailing device according to the present invention, the pressurized packer is composed of a disk-shaped packer that is connected in a plurality in succession in a multi-layer via a packer connecting tube to enable the injection or discharge of the filler through the filler injection tube. It may be.

According to the present invention, it is possible to increase the stiffness of the nail nail by installing in the drill hole by configuring the nail to be composed of a prefabricated steel pipe freely adjusted in diameter and a volume control packer (Packer) can be adjusted by the volume control by pressure or pressure reduction. As a result, there is an advantage that can give a support force to the slope during the construction of the foundation foundation.

In addition, the present invention, since it is possible to reinforce the bearing capacity by checking the pressure from time to time during the construction, there is an advantage that can provide a safer working conditions, and also by removing the prefabricated steel pipe and packer to remove from the drilling hole when the construction is completed There is an advantage such that it is possible to improve the work efficiency as well as to ensure the recyclability of the construction equipment and safety of the building.

These objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the preferred embodiment of the present invention.

3a and 3b is a perspective view showing a state in which the pressurized packer is inserted into the prefabricated nail nail steel pipe in the removable soil nailing device according to the present invention, Figure 3a is a pressurized packer 20 according to the present invention is a radius The state before expansion in the direction is shown, and FIG. 3B shows the state after the pressure packer 20 according to the present invention is radially expanded by the pressure.

As shown in Figures 3a and 3b, the removable saw nailing device according to the present invention is a cylindrical unit having a plurality of unit pieces (10a) having a length corresponding to the saw nail used in earth wall or slope stabilization construction Unit piece assembly member for weaving or spaced apart to assemble the prefabricated soy nail steel pipe 10 constituting the body of the plurality of unit pieces (10a) constituting the cylindrical body of the prefabricated soy nail steel pipe 10 in the transverse direction 30 and a length is inserted into the cylindrical body of the prefabricated nail nail steel 10 in a longitudinal direction and provided with a filler injection tube 21 at one end thereof to adjust the radius of the internal pressure through the filler injection tube 21. The variable pressurized packer 20 and the filler injection tube 21 of the pressurized packer 20 are connected via an injection valve 41 to inject a filler into the pressurized packer 20 or the Opening the injection valve is composed of a pressure adjusting member 40 for adjusting the pressure of the pressure packer 20.

At this time, in the removable saw nailing device according to the present invention, the unit piece assembly member 30 is made of an elastic body, preferably springs or springs that can be tightened or expanded by elasticity, the pressure packer 20 is pressed by a radius In the case of extending in the direction, as shown in FIG. 3b, each unit piece 10a of the prefabricated nailnail steel pipe 10 may be configured to be extended together in a radial direction while being spaced apart.

In addition, in the removable soil nailing apparatus according to the present invention, the pressure regulating member 40 is an injection valve 41 directly connected to the filler injection tube 21 of the pressure packer 20, and the injection Between the pressure gauge 42 for injecting filler into the pressurized packer 20 through the valve 41, a pressure gauge 42 for measuring and indicating a pressure in the pipe, and between the pressure gauge 42 and the oil pressure 44. It consists of a check valve 43 is connected.

4A and 4B are exploded views of the prefabricated soy nail steel pipe according to the present invention, and FIG. 4A is a developed view before the prefabricated soy nail steel pipe 10 is expanded, and FIG. The exploded view after 10 is expanded is shown.

As shown in Figure 4a and 4b, each unit piece (10a) of the prefabricated soil nail steel pipe (10a) to form an assembly member insertion hole (10b) in each of the upper and lower ends to form the unit piece assembly member (30) Is inserted through the assembly member insertion hole 10b so that each unit piece 10a can be folded or spaced apart in the lateral direction so that the pressing packer 20 is expanded before the plurality of unit pieces 10a are extended. This is folded as shown in Figure 4a, when the pressure packer 20 is expanded in the radial direction by the pressing it is possible to space the plurality of unit pieces (10a) as shown in Figure 4b.

In addition, each unit piece (10a) constituting the prefabricated soil nail steel pipe (10) is made of a plate shape of the length corresponding to the nail nail and each unit piece (10a) is formed to have a curved surface in the transverse direction with respect to the longitudinal direction As a result, when the unit pieces are assembled into the cylinders as shown in FIGS. 3A and 3B by the unit piece assembly member 30, the unit pieces may be configured to have a cylindrical body having a constant radius of curvature.

5A and 5B illustrate an embodiment in which the pressurized packer according to the present invention consists of a plurality of disc shaped packers, and FIG. 5A illustrates a state before the expansion of the plurality of disc shaped packers 22 according to the present invention. FIG. 5B is a view illustrating a state after a plurality of disc shaped packers 22 according to the present invention are expanded by pressing.

As shown in Figure 5a and 5b, another embodiment of the pressurized packer, a plurality of consecutively connected through the packer connecting pipe 23 to enable the injection or discharge of the filler through the filler inlet tube 21 It consists of a disc shaped packer 22. Here, each disk packer 22 may be assembleably connected by a packer connector 23, and thus, the disk packer 22 may be adjusted according to the total length of the prefabricated nailnail steel pipe 10. Of course it can be. This allows the disk-shaped packer 22 to extend its application range than the pressurized packer 20 formed in a cylindrical shape as shown in FIGS. 3A and 3B.

Removable Soil Nailing process of the present invention configured as described above, first, forming a perforation hole in the ground of the proper position for slope stabilization and a plurality of unit pieces made of a length corresponding to the nail to be nailed By assembling (10a) using the unit piece assembly member 30, as shown in Figure 3a to form a prefabricated soil nail steel pipe (10) forming a cylindrical body. At this time, since the prefabricated soil nail steel pipe 10 is assembled by the unit piece assembly member 30 made of an elastic body, each of the unit pieces 10a according to the expansion or restoring force of the elastic body is also shown in Figs. 3a and 3b. It can be folded or spaced together.

After inserting the prefabricated nailnail steel pipe 10 as shown in Figure 3a in the interior of the drilling hole, the pressurized packer 20 or disk type of the radial shape does not extend in the interior of the cylindrical body of the prefabricated nailnail steel pipe 10 The packer 22 is inserted in the longitudinal direction. At this time, the pressurized packer 20 or disc-shaped packer 22 is inserted such that the filler injection tube 21 is positioned at the top.

Thereafter, the injection valve 41 and the check valve 43 connected to the filler injection tube 21 are opened, and the filler is pressurized by the hydraulic packer 20 of the pressure regulating member 40 or the disk type. When injected into the packer 22, the pressure packer 20 or the disk packer 22 is radially expanded while the pressure inside the packer 20 or the disk packer 22 is increased. At this time, the internal pressure of the packer according to the filling material is instructed through the pressure gauge 42.

In accordance with the expansion of the pressurized packer 20 or the disk-shaped packer 22 is in close contact with the inner circumferential surface of the prefabricated nail nail steel pipe 10, the unit piece assembly member tightening each unit piece 10a of the prefabricated nail nail steel pipe 10 Pressing the packer 20 acting in a radial direction while the distance between the unit pieces (10a) of the prefabricated soy nail steel pipe 10 is spaced apart by the elastic expansion of 30 (30) The expansion force by the disk-shaped packer 22 and the prefabricated soy nail steel pipe 10, and the restoring force by the elasticity of the unit piece assembly member 30 acting in the center direction of the prefabricated soy nail steel pipe 10 can act simultaneously, As a result, by the pressurized packer 20 or the disc-shaped packer 22 and the prefabricated nail nail steel tube 10, the bearing force on the soil surface can be reinforced.

As described above, after completing the soil nailing process by reinforcing the supporting force by the pressurized packer 20 or the disc shaped packer 22 and the prefabricated soil nail steel pipe 10, the pressurized packer is used by using the check valve 43. It is possible to maintain the bearing capacity of the earth wall during the construction period by checking the pressure inside the (20) or the disk-shaped packer 22 at any time.

That is, the check valve 43 is closed and the injection valve 41 is opened to read the instructions of the pressure gauge 42 to check the pressure inside the pressurized packer 20 or the disc shaped packer 22 at any time, By injecting or discharging the filler according to the result of the check, it is possible to maintain the bearing capacity of the prefabricated soil nail steel pipe in the same state as the initial construction.

On the other hand, after the construction is completed, all of the injection valve 41 and the check valve 43 connected to the filler injection pipe 21 are opened to discharge the filler in the pressurized packer 20 or the disc shaped packer 22 to the outside. When the pressure of the packer 20 or the disk packer 22 is reduced, the pressure packer 20 or the disk packer may be reduced by the restoring force of the unit piece assembly 30 acting in the center direction of the steel pipe 10 while reducing the internal pressure. 22) the volume is reduced, so that each unit piece (10a) of the prefabricated nailnail steel pipe (10) can be folded, the pressurized packer 20 or disc shaped packer (22) is a prefabricated nailnail steel pipe (10) By being spaced apart from the inner circumferential surface of the pressurized packer 20 can be separated from the pressurized packer 20 or the disk-shaped packer 22.

As described above, the preferred embodiment of the present invention has been described, but the present invention may use various changes, modifications, and equivalents. Therefore, the above description does not limit the scope of the invention defined by the limitations of the following claims.

1 is a conceptual diagram of a conventional pressureless saw nailing method

2 is a conceptual diagram of a conventional pressure saw nailing method

Figure 3a and Figure 3b is a perspective view showing an extract of a state in which the pressurized packer is inserted into the prefabricated nail nail steel pipe in the removable soil nailing device

Figures 4a and 4b is an exploded view before and after the expansion of the prefabricated nailnail steel pipe according to the present invention

5a and 5b is an embodiment of the pressurized packer according to the present invention consists of a plurality of disk-shaped packer

<Explanation of symbols for the main parts of the drawings>

10: Prefabricated Soil Nail Steel Pipe 10a: Unit

10b: assembly member insertion hole 20: pressure packer

21: filling material injection tube 22: disc shaped packer

23: packer connector 30: unit piece assembly member

40: pressure regulating member 41: injection valve

42 pressure gauge 43 check valve

44: oil press

Claims (6)

In the saw nailing device for earth wall or slope stabilization work, Prefabricated soil nail steel pipe is a plurality of unit pieces having a length corresponding to the soil nail used in earth wall or slope stabilization construction to form a cylindrical body; A unit piece assembly member for assembling a plurality of unit pieces constituting the cylindrical body of the prefabricated nail nail steel pipe; A pressurized packer inserted into the cylindrical body of the prefabricated nail nail steel in a longitudinal direction, and having a filler injection tube at one end thereof, the pressure packer of which a radius is varied by adjusting an internal pressure through the filler injection tube; It is connected to the filler injection tube of the pressurized packer through a valve, the filler is injected to the inside of the pressurized packer or comprises a pressure adjusting member for adjusting the pressure of the pressurized packer by opening the valve Expression saw nailing device. The method of claim 1, The unit piece assembly member is removable soil nailing device, characterized in that consisting of an elastic body. The method of claim 1, The prefabricated soil nail steel pipe, with respect to each of the unit pieces, forming an assembly member insertion hole in each of the upper end and the lower end, a plurality of unit pieces are folded by the connection of the unit piece assembly member through the assembly member insertion hole or Removable saw nailing device, characterized in that assembled apart. The method of claim 1, Each unit piece constituting the prefabricated soil nail steel pipe is formed in a plate shape having a length corresponding to the nail nail, and each unit piece is formed to have a curved surface transversely with respect to the longitudinal direction, so that each unit piece is assembled by the unit piece assembly member. Removable saw nailing device, characterized in that configured to form a cylindrical body having a constant radius of curvature when assembled. The method of claim 1, wherein the pressure regulating member, An injection valve directly connected to a filler injection tube of the pressurized packer; A pressure gauge for measuring and indicating a hydraulic pressure and a pressure for injecting a filler into the pressurized packer through the injection valve; Removable saw nailing device, characterized in that consisting of a check valve connected between the pressure gauge and the hydraulic. The method of claim 1, wherein the pressure packer, Removable saw nail nailing device, characterized in that consisting of a disk-shaped packer is connected to a plurality in succession through a packer connecting pipe to enable the injection or discharge of the filler through the filler inlet pipe.

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