KR100672854B1 - Soil Nailing System And It's Construcion Work Method Thereof - Google Patents

Abstract

The present invention is formed on a plurality of perforated holes, each of which is perforated to reinforce the pull and tensile forces on the ground to prevent settlement or deformation of the soil layer consisting of soft soil, expandable soil, and sedimentary soil during the formation of the reinforcement wall. The present invention relates to a soil nailing device to be installed, and in particular, a packer body fixed to a nail body is made of a breathable material having good absorption. At this time, the packer body is fixed through a plurality of binding means. It relates to a soil nailing device, characterized in that the thickness of the inlet side of the drilling hole is bound to be relatively smaller so as to be discharged smoothly.

In addition, the present invention relates to a construction method of the soil nailing device, for this purpose, the step of drilling a plurality of drilling holes in the horizontal direction or the up / down inclination direction, such as tunnel, slope incision and underground excavation; (S100), and Installing a nail nailing device into each of the drill holes; (S200) and injecting grout material into the drill holes corresponding to the packer body and the shoe through a second hose connected to the nail nailing device; (S300) and the step of injecting the packer body water through the first hose connected to the soil nailing device; (S400), step S300, and S400 proceeds to the entrance of the hole to reinforce the ground; S500), characterized in that made.

 Soil nailing, rebar, drilling, packer, earth and sand, ground

Description

Soil Nailing System And It's Construcion Work Method Thereof}

1 is a schematic view showing the incision surface is installed nailing device,

2 is a first perspective view of the soil nailing device of the present invention;

3 is an exploded perspective view of the shoe extracted from FIG.

Figure 4 is an exploded perspective view of the soil nailing device according to Figure 2,

5 is a second perspective view of the soil nailing device of the present invention;

6 is a block diagram of a first packer body extracted from FIG.

7 is a block diagram of a second packer body extracted from FIG.

8 is a state in which the use of the soil nailing device is installed in the drilling hole of the incision surface,

9 is a conceptual diagram showing the effect shown in the soil nailing device,

10 is a flow chart showing a construction method of the soil nailing device according to an embodiment of the present invention,

11 is a flow chart showing a construction method of a soil nailing device according to another embodiment of the present invention.

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

10: nail body 11: rebar

12: wire rope 20: shoe

21: Bonding Home 30: Packer

31: support member 31a: quicklime

32: wire mesh 41: first hose

42: hose 2 51: hose band

52: rubber band 100: the soil nailing device

200: ground 210: slope

300: drill hole

The present invention is a packer body that is fixed to the nail body is made of a breathable material with good absorption, wherein the packer body is fixed through a plurality of binding means, the construction of the perforated hole so that the air inside the drilling hole can be smoothly discharged to the outside during construction The present invention relates to a soil nailing device and a construction method where the thickness of the inlet side is relatively smaller, and more particularly, to a grout material (cement + water, cement + water + sand) when the soil nailing device is installed in a drilling hole. The present invention relates to a soil nailing device and a construction method thereof in which the internal air of the boring hole is discharged to the outside through the packer body and has a ground reinforcing effect due to the efficient injection of the grout material and the injection density equally.

In general, as the industry develops, it is inevitable to develop steep slopes such as mountainous areas such as complex construction, construction of new cities, and road construction. Therefore, construction efficiency, economic feasibility, and efficiency are improved while increasing land utilization and securing stability and comfort of residential complexes. The establishment of slope stabilization measures to meet environmental integrity is required.

Grouting soil nailing, which is widely used as slope stabilization method, is a ground reinforcement method and is widely used in Europe and the United States for the purpose of reinforcing slopes and flexible support for excavation surfaces.

In other words, the grouting soil nailing used as an example of the ground reinforcement method is based on the basic concept that the soil body reinforced by the deformed rebar installed on the ground acts like an integrated retaining wall. Its utility as a surrogate structure has been proven and its application has recently been spreading.

In particular, in developed countries, where many theoretical studies on soil nailing have been conducted, they are widely used in small-scale excavation works with a depth of 20M or less, and many specialized construction companies are constructing them in the field.

On the other hand, when the conventional saw nailing method is divided by the grouting method of the drilling hole there is a pressureless method that is a grouting method by gravity and a pressurization method to apply pressure during grouting.

In this case, the pressureless method is to install the soil nailing device in the drilling hole, and grouting is performed several times (typically 2 to 5 times) by gravity to fill the drilling hole. Since construction is required to have a degree of downward slope, it is required to repeat grouting several times, so the construction period is long and the constructability is poor. As a result, it may not be possible to fill the perforated hole tightly, which may reduce the effect of nailing.

The pressurization method is to close the inside of the drilled hole by pressure grouting to improve the principal surface friction with the nailing device or to improve the surrounding ground. In order to maintain the predetermined pressure (about 6 ~ 15kg / ㎠) is used a packer mainly using foam urethane, etc. If the injection pressure is not properly adjusted according to the ground conditions, in some cases it may disturb the ground There is concern.

Nails installed on the slope of the slope are subjected to tensile and shear forces. The closer to the right angle to the slope, the shear force is received by the slope activity, and when inclined to the slope, the nail is simultaneously subjected to the tensile and shear forces.

On the other hand, in the application of the Soil Nailing Method, a significant portion of the construction cost and construction period are required for drilling work, which requires more efficient use of the nail body, and faithfully grouts the inside of the drilling hole after installing the nail body. Since it is essential to improve the workability without disturbing the ground, especially in the case of installing a long nail, the fidelity of grouting in the drill hole greatly affects the nailing effect.

Conventional pressurization type soil nailing device is configured to wrap the packer body in the deformed rebar. However, the packer body is mainly composed of a very light weight urethane foam for the sealing effect, there is a disadvantage that the air in the drilling hole does not escape to the outside during construction by the grouting method.

In other words, the grouting method is to insert the grout material hose and the air hose into the packer body and inject foamed urethane into the packer body to discharge the air inside the drilling hole to the outside through the air hose installed in the packer body. Proceeded to.

However, when the grout material is injected, the internal pressure of the boring hole is increased. At this time, the air inside the boring hole is not well discharged through the air hose.

To this end, the above problems are overcome by appropriately adjusting the injection pressure of the grout material, but this causes another problem, that is, a disadvantage in that the construction time is long, and there is always a possibility that the ground may be disturbed when the injection pressure is increased. come.

In addition, the material of the packer body is an expensive material such as urethane and the equipment for injecting the urethane requires a high price, which has resulted in an increase in construction cost.

In addition, the nails that are supported in the center of the drilled hole, that is, the deformed rebars, must respond appropriately to the external shear force, so that the diameter of the deformed rebars also sags due to the increase in shear force and tensile force per unit area. As a result of the difficult problems in construction, as a result, the installation interval of the nailing device for the ground is narrowed, and a problem in that the drilling cost, which occupies a considerable part of the construction cost, is large.

In other words, existing nails using steel bars or steel pipes are factory products, and the tensile strength and shear strength of steel bars or steel pipes are limited, so the cross-sectional area of nails must be increased in order to strengthen the restraint of the slope action of the blocks where the nails are installed. do. Therefore, considering the constructability and economic feasibility, it is extremely limited, glass fiber reinforced pipe (FRP pipe) using a composite material requires a separate manufacturing process, such that there is a fear that the construction performance, economic feasibility in the current performance.

The present invention has been made in view of the above problems, the first object of the present invention, the packer body fixed to the nail body is made of a breathable material with good absorption, wherein the packer body through a plurality of binding means To fix, but to provide a soil nailing device that the thickness of the inlet side of the drilling hole is relatively smaller so that the air inside the drilling hole during the construction can be smoothly discharged to the outside.

The object of the present invention is to prevent settlement or deformation of the soil layer consisting of soft soil, expandable soil, and settled soil when forming the reinforcement wall, and to reinforce the ground during tunneling, slope cutting and underground excavation. In the soil nailing device that is installed on each of a plurality of drilled holes to reinforce the drawing force and tensile force in the ground,

Installed on each of the drill holes 300, the wire rope 12 is wound on the outer circumferential surface of the deformed reinforcing bar 11 in order to increase the rigidity to the external shear force, and the wound wire rope 12 to the 11) nail body 10 is configured to be fixed through the binding means together;

Shoe 20 of the 'cone' type coupled to the end of the nail body 10 to maintain the center by guiding the nail body 10 along the perforation hole 300; And the nail body 10 is wrapped around the outer circumferential surface of the nail body 10 to a thickness close to the inner surface of the drilling hole 300 so that the nail body 10 can be disposed in the central portion in the drilling hole 300, the nail body ( Packer body 30 is fixed to a plurality of equally spaced intervals along the longitudinal direction of 10), comprising a, the packer body 30 is fixed through a plurality of binding means, when the construction of the hole 300 inside The thickness of the inlet side of the punching hole 300 is relatively small, so that the air is smoothly discharged to the outside is achieved by the soil nailing device, characterized in that installed.

In addition, the shoe 20 is divided into half to be fixed to each other through the binding means, each of the inside is formed with an elliptical binding groove 21 to prevent the separation of the nail body 10 having a variety of diameters, Two binding grooves 21 are preferably formed so that the deformed reinforcing bar 11 and the wire rope 12 can correspond in shape.

In addition, the binding means is preferably any one selected from the hose band 51, steel wire and rubber band (52).

In addition, the packer body 30 is any one of the support member 31 selected from porous fibers, cotton, glass wool and glass reinforced fiber so that water and air can be easily absorbed or ventilated, and the support member 31 is rigid It is preferably composed of a wire mesh 32 having a 'mesh' structure seated on the support member to take.

In addition, the packer body 30 is any one of the support member 31 selected from porous fibers, cotton, glass wool, glass-reinforced fibers and water to the support member 31 so that water and air can be easily absorbed or ventilated Quicklime powder 31a applied to the support member 31 to be absorbed and expanded and cured, and a wire having a 'mesh' structure seated on the support member 31 so that the support member 31 takes rigidity. It is preferred that the mesh 32 be configured.

In addition, the packer body 30 may include a first hose 41 connected to allow water or cement to flow therein, and a grout material to be introduced into the drilling hole 300 in the inner side of the packer body 30. It is preferable that the two hoses 42 penetrate.

The present invention has been made in view of the above problems, and the first object of the present invention is to inject grout material when constructing a soil nailing device into a drilling hole, and at the same time, the internal air of the drilling hole is moved outward through the packer body. It is to provide a construction method of the soil nailing that can be easily discharged to have a ground reinforcement effect by the efficient injection of grout material and the equivalent injection density.

In addition, the second object of the present invention is to maximize the allowable strength and yield strength per unit area of the deformed reinforcing bar compared to the conventional soil nailing device, thereby providing a very cheap installation of a nail nailing device and its construction method It is.

In addition, the object of the present invention, the step of drilling a plurality of drilling holes 300 in the horizontal direction or the up / down inclination direction, such as tunnel, slope cut and underground excavation; (S100), and each of the drilling holes 300 Installing an inside of the nailing device 100; (S200) between the packer body 30 and the shoe 20 through the second hose 42 connected to the nailing device 100; Injecting and curing the grout material in the corresponding drilling hole 300; (S300) and by injecting water into the packer body 30 through the first hose 41 connected to the soil nailing device 100 Hardening step; (S400) and step S300, and step S400 to the entrance of the drilling hole 300 to reinforce the ground 200; (S500) is preferably made.

In addition, the packer body 30 of step S300, any one of the support member 31 selected from porous fibers, cotton, glass wool, glass-reinforced fiber so that water and air can be easily absorbed or ventilated, and the support member ( 31) the quicklime powder 31a applied to the support member 31 so that water is absorbed and expanded and cured, and the 'mesh' seated on the support member 31 so that the support member 31 takes rigidity. It is preferred to be composed of a wire mesh 32 having a structure.

In addition, the packer body 30 of step S300, any one of the support member 31 selected from porous fibers, cotton, glass wool, glass-reinforced fiber so that water and air can be easily absorbed or ventilated, and the support member 31 ) Is preferably composed of a wire mesh 32 having a 'mesh' structure seated on the support member 31 to take rigidity.

The first hose 41 of step S400, it is preferable that the cement water made of cement powder and water is injected.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings with respect to the soil nailing device according to the present invention will be described in detail.

1 is a schematic view showing a four-sided incision surface is installed nailing device, Figure 2 is a first perspective view of the soil nailing device of the present invention, Figure 3 is an exploded perspective view of the shoe extracted from Figure 2, Figure 4 An exploded perspective view of the soil nailing device according to FIG. 2.

As shown in Figures 1 to 4, the soil layer formed of soft soil, expandable soil, sedimentary soil, etc. during the formation of the reinforcement wall reinforcement to prevent the settlement or deformation, the ground during tunnels, slopes and underground excavation ( It relates to a soil nailing device 100 which is respectively installed on a plurality of perforated holes 300 to reinforce pull and tensile force on the ground to reinforce (200). That is, the present invention is a device that can stably reinforce the slope moving along the slope activity surface 210 of the ground (200).

Soil nailing device 100 is composed of three parts, which is a nail body 10 having a predetermined diameter, the shoe 20 is coupled to the end of the nail body 10, and the nail body 10 The packer body 30 is installed in the longitudinal direction of the plurality.

Here, the nail body 10 is composed of a wire rope 12 wound around the outer reinforcing bar 11 of the deformed reinforcing bar 11, as a main skeleton of the deformed reinforcing bar 11 of about Ø 29 mm. At this time, the nail body 10 and the wire rope 12 is configured to be fixed to each other through the binding means, the binding means is preferably a hose band (51).

The wire rope 12 is to increase the rigidity of the external shear force applied to the deformed reinforcing bar 11, and the deformed reinforcing bar 11 and the wire rope 12 are integrated to the external shear force due to the increase in the cross-sectional area. Allowable strength and yield strength can be maximized.

In addition, the shoe 20 has a 'cone' shape, the diameter smaller than the inner diameter of the drilling hole 300 to approach the inner diameter of the drilling hole 300 to maintain the center by guiding the nail body 10 It is preferable to have. At this time, the shoe 20 has a structure in which a binding groove 21 is formed to partially fix the end portion of the nail body 10.

Here, the shoe 20 is divided into half to be separated from each other to be tightened from the outside to wrap the nail body 10 is fixed through the binding means. At this time, the nail body 10 is composed of the deformed reinforcing bar 11 and the wire rope 12, the binding groove 21 formed in each of the two to prevent the separation of the nail body 10 The binding groove 21 is formed. In this case, each of the binding grooves 21 is preferably elliptical to be accommodated regardless of the diameter of the deformed reinforcing bar 11 and the wire rope 12.

In addition, the binding groove 21 corresponding to the deformed reinforcing bar 11 has a plurality of protrusions and protrusions formed without interference on the ribs formed on the outer circumferential surface of the deformed reinforcing bar 11, and thus can be more stably fixed by fixing through the binding means. Is prepared. Here, the binding means is preferably a hose band (51).

The packer body 30 is any one of the support member 31 selected from porous fibers, cotton, glass wool and glass reinforced fibers so that water and air can be easily absorbed or ventilated, and the support member 31 is rigid It is composed of a wire mesh 32 seated on the support member 31 to.

The packer body 30 is formed on the outer circumferential surface of the nail body 10 to a thickness close to the inner surface of the drilling hole 300 so that the nail body 10 may be disposed at the center along the longitudinal direction of the drilling hole 300. Wrapped, but fixed in a plurality of equal intervals along the longitudinal direction of the nail body (10).

Packer body 30 of this structure is fixed at both ends through the two binding means, the thickness of the inlet side of the drilling hole 300 so that the internal air of the drilling hole 300 can be smoothly discharged to the outside during construction It is smaller and tied together. In this case, the thickness of the inlet side is relatively smaller, so that the packer body is not pushed out by the pressure of the grout material to be filled. On the contrary, the part where the packer body is bound to a wide thickness is packed into the packer by the filling pressure. This is to ensure that the sieve is compressed to seal the perforation holes on their own.

That is, the end of the packer body 30 corresponding to the inlet side of the drilling hole 300 is strongly bound through the hose band 51, and the end of the packer body 30 corresponding to the shoe 20 side is made of rubber. It is a configuration loosely bound by the band 52.

FIG. 5 is a second perspective view of the soil nailing apparatus of the present invention, FIG. 6 is a configuration diagram of the first packer body extracted from FIG. 5, and FIG. 7 is a configuration diagram of the second packer body extracted from FIG. 5.

As shown in FIGS. 5 to 7, the number of packer bodies 30 is different according to the depth of the drilling hole 300 drilled into the ground 200 in the soil nailing device 100 of the present invention. At this time, the first hose 41 is connected to the packer body 30, and the second hose has a structure penetrating therein.

Here, the first hose 41 is a hose for supplying water or cement to the support member 31 of the packer body 30, and the second hose 42 uses the packer body 30 as a support base to packer body. It is a hose for injecting grout material into the drilling hole 300 located on the inner side of (30).

Accordingly, the first hose 41 is configured to be connected to the inside of the packer body 30, but the second hose 42 is configured to have an end portion on the drilling hole 300 across the packer body 30. to be.

Here, if the quicklime powder 31a is applied to the support member 31 of the packer body 30, only water is supplied through the first hose 41, and as shown in FIG. 6, the packer body ( If the 30 consists of the support member 31 and the wire mesh 32 only, the cement water is supplied through the first hose 41 to cure the packer body 30.

In such a configuration, a structure capable of tightly sealing the perforated hole 300 perforated in the ground is provided through the soil nailing device 100 installed in the perforated hole 300.

Hereinafter, a state diagram showing the operation of the soil nailing device of the present invention.

FIG. 8 is a state diagram in which a soil nailing device is installed in a perforated hole of a slope cut surface, and FIG. 9 is a conceptual diagram showing an effect of the soil nailing device.

As shown in FIG. 8 and FIG. 9, the construction of the soil nailing device 100 proceeds from the inner side of the drilling hole 300 to the inlet to reinforce the ground 200.

At this time, the reinforcement order of the ground 200 is cured in the order of the drilling hole-packer body-hole hole-packer body from the inner side of the drilling hole 300.

First, the grout material is injected at a low pressure into the corresponding drilling hole 300 to which the shoe 20 is coupled through the second hose 42 to fill the inside of the drilling hole 300. At this time, as the inside of the drilling hole 300 is filled, the air of the corresponding drilling hole 300 is discharged toward the inlet of the drilling hole 300. This is possible because the support member 31 of the packer body 30 is made of a material having good ventilation.

At this time, since the packer body 30 firmly fixes the end corresponding to the inlet side of the drilling hole 300 through the hose band 51, the packer body 30 can be sufficiently endured without being pushed to the inner side by the filling pressure of the grout material. At this time, due to the difference in the diameter of the packer body fixed by the rubber band as shown in Figure 9 due to the air permeable material of the space or the packer body formed on both sides of the packer body is configured to be able to smoothly discharge the air inside the hole

In addition, the packer body 30 is very close to the inner surface of the drilling hole 300 because the end portion corresponding to the shoe 20 side is fixed by the rubber band 52. Therefore, the grout material to be filled in the drilling hole 300 is blocked by the packer body 30, the blocked grout material is to be filled with high density by the pressing force.

Thereafter, water or cement is supplied to the packer body 30 through the first hose 41 to be rapidly cured by volume expansion by hydration with quicklime.

10 is a flowchart illustrating a construction method of the soil nailing apparatus according to an embodiment of the present invention, Figure 11 is a flow chart showing a construction method of the soil nailing apparatus according to another embodiment of the present invention.

10 and 11, the construction method of the soil nailing device of the present invention will be briefly described.

First, a plurality of drilling holes are drilled in a horizontal direction or an up / down inclination direction such as a tunnel, a slope cut and an underground excavation. (S100)

Then, a soil nailing device is installed into each of the perforation holes. (S200)

In addition, the grout material is injected at a low pressure into the drilling hole corresponding to the packer body and the shoe through the second hose connected to the soil nailing device.

After that, the packer body water is injected through the first hose connected to the soil nailing device. Here, the packer body is preferably formed by applying quicklime powder as a supporting member. (S400)

Proceed to step S300 and step S400 to the entrance of the drilling hole to reinforce the ground to complete. (S500)

On the other hand, when the support member of the packer body does not contain quicklime powder, cement water is supplied in step S400.

As described above, the number of packer bodies may vary according to the depth of the drilling hole and the nailing device according to the present invention.

In addition, the construction method of the soil nailing device, when the grout material to be filled in the drilling hole is injected at a low pressure, if the grout material is filled at a high pressure, the construction order from the inner side of the drilling hole packer body-hole hole-packer It can be installed in the order of sieve-hole hole.

And in addition to the quicklime powder mentioned in the present invention, it is possible to replace the slaked lime and quicklime processed cement powder.

As described above, according to the soil nailing device and the construction method thereof according to the present invention, since the air inside the drilling hole can be smoothly discharged to the outside during the construction of the soil nailing device, the effective reinforcement and the ground reinforcement effect by the equal injection density And construction is very fast advantage.

In addition, since the deformed rebar and wire rope are integrated as compared to the conventional soil nailing device, the cross-sectional area is increased and the allowable strength and yield strength per unit area can be maximized, so the number of soil nailing devices installed on the slope can be minimized. Thereby, there is an advantage that the installation cost is very low.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (10)

Reinforcement of pull and tensile force in the ground to prevent settlement or deformation of soil layer consisting of soft soil, expandable soil, and settled soil when reinforcing wall is made, In the soil nailing device is installed on each of the plurality of perforated holes to be made, Installed on each of the drill holes 300, the wire rope 12 is wound on the outer circumferential surface of the deformed reinforcing bar 11 in order to increase the rigidity to the external shear force, and the wound wire rope 12 to the 11) nail body 10 is configured to be fixed through the binding means together; Shoe 20 of the 'cone' type coupled to the end of the nail body 10 to maintain the center by guiding the nail body 10 along the perforation hole 300; And The nail body 10 is wrapped on the outer circumferential surface of the nail body 10 to a thickness close to the inner surface of the drilling hole 300 so that the nail body 10 can be disposed in the central portion of the drilling hole 300, the nail body 10 It is configured to include; packer body 30 is fixed to a plurality of equal intervals along the longitudinal direction of the; The packer body 30 is fixed through a plurality of binding means, and the thickness of the inlet side of the drilling hole 300 is relatively smaller so that the air inside the drilling hole 300 can be smoothly discharged to the outside during construction. Soil nailing device, characterized in that installed. The method of claim 1, The shoe 20 is divided into half and are fixed to each other through the binding means, each of the inside is formed with an elliptical binding groove 21 to prevent the separation of the nail body 10 having a variety of diameters, the binding Soil nailing device characterized in that the two are formed so that the deformed reinforcing bar (11) and the wire rope (12) corresponding in shape. The method according to claim 1 or 2, The binding means is a nailing device, characterized in that any one selected from the hose band (51), steel wire and rubber band (52). The method of claim 1, The packer body 30 is any one of the support member 31 selected from porous fibers, cotton, glass wool and glass reinforced fiber so that water and air can be easily absorbed or ventilated; Soil nailing device, characterized in that the support member 31 is composed of a wire mesh (32) having a 'mesh' structure seated on the support member to take rigidity. The method of claim 1, The packer body 30 is any one of the support member 31 selected from porous fibers, cotton, glass wool, glass reinforced fiber so that water and air can be easily absorbed or ventilated; Quicklime powder (31a) is applied to the support member 31 so that the water is absorbed by the support member 31 and expanded and cured; Soil nailing device, characterized in that the support member 31 is composed of a wire mesh (32) having a 'mesh' structure seated on the support member (31) to take rigidity. The method according to any one of claims 1, 4 or 5, The packer body 30 is connected to the first hose 41 so that water or cement water can be introduced therein, and a second grout material can be introduced into the drilling hole 300 in the inner side of the packer body 30. Soil nailing device, characterized in that the hose 42 is penetrated. Drilling a plurality of drilling holes 300 in a horizontal direction or an up / down inclination direction such as a tunnel, a slope cut and an underground excavation; (S100) Installing a nail nailing device 100 into each of the drilling holes 300; (S200) Injecting and curing the grout material into the punching hole 300 corresponding to the packer body 30 and the shoe 20 through the second hose 42 connected to the soil nailing device 100; (S300 ) Injecting water into the packer body 30 through the first hose 41 connected to the nail nailing apparatus 100 and curing the water; Step S300, and step S400 to the entrance of the drilling hole 300 to reinforce the ground 200; (S500) Construction method of a soil nailing device comprising a. The method of claim 7, wherein Packer body 30 of step S300, One support member 31 selected from porous fibers, cotton, glass wool, glass-reinforced fibers so that water and air can be easily absorbed or ventilated, Quicklime powder (31a) is applied to the support member 31 so that the water is absorbed by the support member 31 and expanded and cured; Construction method of a soil nailing device, characterized in that the support member 31 is composed of a wire mesh (32) having a 'mesh' structure seated on the support member (31) to take rigidity. The method of claim 7, wherein Packer body 30 of step S300, One support member 31 selected from porous fibers, cotton, glass wool, glass-reinforced fibers so that water and air can be easily absorbed or ventilated, Construction method of a soil nailing device, characterized in that the support member 31 is composed of a wire mesh (32) having a 'mesh' structure seated on the support member (31) to take rigidity. The method according to claim 7 or 9, The first hose 41 of step S400, Construction method of a soil nailing device, characterized in that the cement water consisting of cement powder and water is injected.

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