KR101367640B1 - Soil-nailing method for elimination of tension member using manual tension device and fixing unit - Google Patents

Abstract

The present invention can be easily tensioned and removed by a simple method without a separate equipment using a manual tensioner, and can be easily removed by rotating the tension member while fixing the tension member stably inside the excavation hole with a simple structure In order to reduce the time, effort, and cost of construction, it is possible to provide a removable soil nailing method using a manual tensioner and a fixing unit. Removable soil nailing method using a manual tensioning device and a fixing unit according to an embodiment of the present invention, the step of drilling a drill hole in the ground; Assembling the fixing unit at one end of the tension member to insert the tension member so that the fixing unit is fixed inside the drilling hole; Grouting by filling a grout material into the excavation hole; Assembling a manual tensioner at the other end of the tension member; Tensioning the tension member by operating the manual tensioner; And operating the manual tensioner to remove the tension member.

Description

SOIL-NAILING METHOD FOR ELIMINATION OF TENSION MEMBER USING MANUAL TENSION DEVICE AND FIXING UNIT}

The present invention relates to a removable soil nailing method using a manual tensioner and a fixing unit, and more particularly, a manual tensioner for removing a tension member after construction in a soil nailing method used for earthquake structures or slope reinforcement; It relates to a removable soil nailing method using a fixing unit.

In general, the Soil-Nailing Method is a ground reinforcement method for stabilization by inserting reinforcement into the soil and inserting the reinforcement into the base at close intervals without prestressing to increase the overall shear strength of the base itself. In addition, it is a reinforcement soil method that restrains the expected displacement of the ground after construction is completed.

Conventionally, it has been disclosed with the method of the soil nailing method of using a reinforcing bar as a tension member and installing a stator socket in the middle of the reinforcing bars to insert and grout the reinforcing bars to tension and remove the reinforcing bars.

In the conventional method of soil nailing, a separate hydraulic device is used to apply tension to the tension member.

However, in the conventional method of soil nailing, there is an inconvenience in that the hydraulic device must always be loaded and transported. If the hydraulic device fails or the hydraulic device is not transported to the site yet, the equipment to replace the hydraulic device is not provided. There is a problem that the operation must be stopped until it is provided, and because a separate additional device for using a hydraulic device is required, there is a problem that a lot of equipment, a lot of manpower, and a lot of time are required to form one tensile support.

Therefore, there is a need for a new method of removing soil nailing, which allows easy tensioning on site and allows easy removal of tension members upon completion of construction.

The present invention can be easily tensioned and removed by a simple method without a separate equipment using a manual tensioner, and can be easily removed by rotating the tension member while fixing the tension member stably inside the excavation hole with a simple structure In order to reduce the time, effort, and cost of construction, it is possible to provide a removable soil nailing method using a manual tensioner and a fixing unit.

Removable soil nailing method using a manual tensioning device and a fixing unit according to an embodiment of the present invention, the step of drilling a drill hole in the ground; Assembling the fixing unit at one end of the tension member to insert the tension member so that the fixing unit is fixed inside the drilling hole; Grouting by filling a grout material into the excavation hole; Assembling a manual tensioner at the other end of the tension member; Tensioning the tension member by operating the manual tensioner; And removing the tension member by operating the manual tensioner when the construction is completed.

Also preferably, assembling the fixing unit to the tension member and inserting the fixing unit into the drilling hole may further include applying an anti-rust grease to the tension member, and attaching a protective tube to the tension member. do.

Also preferably, the fixing unit includes a fixing member having a wedge member, a fixing coupling member having a diameter that gradually decreases from one end to the other end, and a housing having a predetermined housing space. The assembling may include inserting the fixing member into the tension member, allowing the wedge member to be inserted into the hole of the fixing member while the wedge member surrounds the tension member. And coupling the fixing coupling member to the fixing housing such that a lower end of the member is exposed to the housing space.

Also preferably, the step of fitting the elastic ring to the tension member so that the elastic ring is disposed on the lower end of the wedge member.

Also preferably, the method further comprises inserting a washer in the tension member.

Also preferably, the method may further include inserting a cover into the tension member to cover a part or the whole of the top of the fixing member.

Also preferably, the manual tensioning device includes a pressing unit, a tension nut member including a plate portion and a tension nut part, and a tension bolt member including a receiving body part and a tension bolt part, and assembling the manual tensioner. The method may include installing the tension nut member so that the plate part is fixed to the ground and the tension nut part is disposed in an excavation hole so that the tension material passes through the tension nut part, and the tension material is inserted into a hole in the tension bolt part. Installing the tension bolt member by screwing the tension bolt part to the tension nut part, and installing the compression unit to the tension member to accommodate the compression unit in the receiving body portion of the tension bolt member. Characterized in that it comprises a step.

Also preferably, the step of installing the crimping unit may include inserting a body member having a hole, the diameter of which gradually decreases from one end to the other end, to the tension member, and allowing a plurality of wedges to wrap the tension member. And inserting the plurality of wedges into the hole of the body member, wherein a pin member provided on one side of the inner surface of the body member is inserted between one of the wedges and the other one of the wedges. .

Also preferably, the step of installing the pressing unit further comprises the step of coupling the cover member to cover the top of the body member so that the plurality of wedges are fixed in a state inserted into the hole of the body member. It features.

Also preferably, the step of tensioning the tension member, releasing the fixing member provided on the side of the receiving body portion of the tension bolt member to release the fixing state of the body member and the receiving body portion, and the tension bolt member Rotating in one direction to move in the direction to be separated from the tension nut portion of the tension nut member, characterized in that it comprises the step of pushing up the body member to tension the tension member.

Also preferably, the step of removing the tension member, the wedge member is separated from the hole of the fixing coupling member to release the crimping state of the wedge member to the tension member, and the pressing unit to the receiving body portion And removing the tension member from the excavation hole while separating from the hole.

Also preferably, the step of releasing the crimping state of the wedge member may be performed by applying an impact force to an upper end portion of the tension member so that the lower end portion of the tension member is moved a predetermined distance into the housing space portion of the fixing housing. It characterized in that it comprises a step of separating from the hole of the fixing member.

Also preferably, the step of releasing the crimping of the wedge member may include tightening the fixing member to fix the body member, and rotating the tension bolt member in an opposite direction to the tension nut portion of the tension nut member. It characterized in that it comprises the step of separating the wedge member from the hole of the fixing member by moving in the direction to be coupled so that the lower end of the tension member is moved a predetermined distance into the housing space of the fixing housing.

On the other hand, according to another embodiment of the present invention removable manual nailing method using a manual tensioning device and a fixing unit, the step of drilling an excavation hole in the ground; Inserting the plurality of tension members into the excavation hole by assembling a fixture to each of the plurality of tension members, and fixing the fixing unit provided in the plurality of fixing units to the multiple coupling fixing housing to be fixed inside the excavation hole; Grouting by filling a grout material into the excavation hole; Assembling a pressing unit and a tension bolt member at the other end of each of the plurality of tension members and assembling a manual tensioner by coupling the plurality of tension bolt members to the multi-tension nut member; Actuating the passive tensioner to tension each of the plurality of tension members; And removing the plurality of tension members by operating the manual tensioner when the construction is completed.

Also preferably, the fixing unit includes a plurality of fixing members having a plurality of wedge members, a plurality of fixing members having holes smaller in diameter from one end to the other end, and a housing space portion having a predetermined size. The assembling of the fixing unit may include inserting the fixing coupling members into the tension members, respectively, and the wedge members into the holes of the fixing coupling members while the wedge members surround the tension members. And inserting the plurality of fixing coupling members into the multiple coupling fixing housing such that a lower end of each fixing coupling member is exposed to the housing space.

Also preferably, the method further comprises inserting an elastic ring to each of the tension members so that the wedge members are supported, and inserting a washer into each tension member and covering the cover with a cover.

Also preferably, the manual tensioner includes a plurality of compression units, a plurality of tension bolt members including a receiving body portion and a tension bolt portion, and a multiple coupling tension nut member including a plate portion and a multi-tension nut portion, Assembling the manual tensioning machine, the step of installing the multiple coupling tension nut member so that the plate portion is fixed to the ground and the multi-tension nut portion is disposed in the excavation hole, and each of the plurality of tension members are each tension bolt Installing the plurality of tension bolt members by screwing the plurality of tension bolt members to the multi-tension nut member while being inserted into the holes in the part, and installing each of the plurality of compression units to the respective tension members. Comprising the step of allowing each pressing unit is accommodated in the receiving body portion of each tension bolt member .

Also preferably, the tensioning may include: releasing the fixing member of each of the tension bolt members to release the fixing state of each of the pressing units and the receiving body, and each of the plurality of tension bolt members in one direction. And rotating each of the pressing units to tension the respective tension members while being rotated so as to be moved in a direction separate from the multi-tension nut member.

Also preferably, the removing of the tension member may include: tightening the fixing members of the tension bolt members to fix each of the compression units, and rotating the plurality of tension bolt members in opposite directions to rotate the multi-tension nut. Separating each of the wedge members from the hole of each fixing member by moving the lower ends of each of the plurality of tension members to a predetermined distance into the housing space of the fixing housing so as to be moved in the direction of engagement with the members. And removing each of the plurality of tension members from the excavation hole while separating the compression unit from each receiving body part.

Removable Soil Nailing method using manual tensioner and fixing unit according to the present invention can be easily tensioned and removed the tension member by a simple method without a separate equipment using a manual tensioner, stably excavating the tension member with a simple structure It is possible to reduce the time, effort, and cost of construction by allowing the tension member to be easily removed by rotating the tension member while fixing the inside of the ball.

An embodiment of a soil nailing method using a manual tensioner and a fixing unit according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view schematically showing an example of the use of a small nailing method using a manual tensioning device and a fixing unit according to an embodiment of the present invention.

As shown in Figure 1 for the civil works or construction work, such as excavation on the ground (A) to secure the excavation site and then proceed to earthwork construction by the soil nailing method for the excavation site.

At this time, excavating a plurality of excavation holes (H) for the slope (B) and then insert the fixing unit (F) and the tension member (10) in the excavation hole (H) and install a manual tensioner (T) The tension member 10 is stretched by the long-term T to increase the shear strength of the slope B.

1 is a rather exaggerated shape to more specifically represent the configuration of the manual tensioning machine (T) and the fixing unit (F) used in the soil nailing method according to the present invention the shape of the manual stretching machine and the fixing unit And size may vary slightly from the actual.

Hereinafter, with reference to Figures 2 and 3 will be described a specific configuration of the manual tensioning machine and the fixing unit used in the small nailing method according to the present invention, with reference to Figures 4 to 12 according to an embodiment of the present invention A small nailing method will be described and a small nailing method according to another embodiment of the present invention will be described with reference to FIGS. 13 to 18.

First, with reference to Figure 2 will be described in more detail with respect to an example of the manual tensioning machine used in the small nailing method according to the present invention.

Manual tensioning machine used in the soil nailing method according to the invention comprises a tension nut member 30, tension bolt member 40 and the pressing unit 50.

The tension nut member 30 includes a tension nut part 30a provided with a nut screw part 32 and a plate part 30b fixed to the ground, and the tension nut part 30a and the plate part 30b. ) May be formed integrally with each other or may be provided in combination with each other.

The tension bolt member 40 includes a tension bolt portion 40a and a receiving body portion 40b. The tension bolt portion 40a includes a bolt screw portion 42 engaged with the nut screw portion 32. Is formed and the receiving body portion 40b is a portion for receiving the body member 51 of the pressing unit 50.

It is possible to allow the tension bolt member 40 to move in the vertical direction with respect to the tension nut member 30 while rotating the tension bolt member 40 in one direction.

The receiving body portion 40b is provided with a receiving portion 44 which forms a space having a predetermined size to accommodate the trunk member 51 of the pressing unit 50.

In addition, the receiving body portion 40b is preferably provided with a tool coupling portion 46, the tool coupling portion 46 is such that a tool such as a spanner device is coupled to the tension bolt member 40 by the tool. By allowing the to rotate, it is possible to make tensioning and removal of the tension member more efficient.

One side of the receiving body portion (40b) is provided with a through hole 47 and the through hole 47 is preferably such that the fixing member 60 is screwed, the fixing member 60 in one direction Rotating through the through hole 47 so as to completely protrude the holding member 44 to the receiving portion 44, it is also possible to rotate the fixing member 60 in the opposite direction to enter into the through hole 47. Do.

On the other hand, the pressing unit 50 is preferably made to include a body member 51, a plurality of wedge member 55 and the cover member 57.

The body member 51 is accommodated in the receiving portion 44 of the receiving body portion 40b of the tension bolt member 40, the body member 51 is accommodated in the receiving portion 44 is basically It is desirable to be able to move independently of each other.

Here, the body member 51 and the receiving body portion 40b may be integrally rotated with each other or may be rotated independently of each other as the fixing member 60 is manipulated.

That is, by rotating the fixing member 60 in one direction to compress the body member 51, the body member 51 can be integrally rotated with the receiving body portion 40b, the fixing member 60 By rotating in the opposite direction to release the pressing on the body member 51 may be such that only the receiving body portion 40b is rotated independently.

At this time, when the fixing member 60 compresses the body member 51, the coupling groove 51c on one side of the outer surface of the body member 51 to increase the binding force between the fixing member 60 and the body member 51. It is preferable to have an end of the fixing member 60 to be coupled to the coupling groove 51c.

In addition, the body member 51 preferably includes a cavity 52 that penetrates the body member 51 and has a space having a predetermined size to accommodate the plurality of wedge members 55. The width of the wedge member 55 is gradually narrowed downward so that the wedge member 55 may naturally compress the tension member 10 as the wedge member 55 moves downward along the cavity 52.

Here, the wedge member 55 is provided to compress the tension member 10, the inner surface of the wedge-shaped tooth structure can be formed to easily compress the tension member (10).

Preferably, the plurality of wedge members 55 are fixed without being separated from each other by the fixing ring 55a.

On the other hand, one side of the cavity 52 of the body member 51 (one side of the inner surface of the body member 51) is provided with a pin member 59, the pin member 59 is a plurality of wedge members When 55 is received into cavity 52, it is arranged between one wedge member and the other wedge member.

As such, the pin member 59 is interposed between the two wedge members so that the plurality of wedge members 55 can move integrally with the trunk member 51 without wandering in the state in which the tension member 10 is compressed. .

And the cover member 56 is provided to be screwed to the screw coupling portion formed in the body member 51 and press the wedge member 55 to release the state in which the wedge member 55 is pressing the tension member 10 It acts to apply pressure so as not to lose.

On the other hand, with reference to Figure 3 will be described in more detail with respect to an example of the fixing unit used in the small nailing method according to the present invention.

As shown in FIG. 3, the fixing unit used in the small nailing method according to the present invention includes a fixing coupling member 110, a wedge member 120, and a fixing housing 170.

As shown in FIG. 3, the wedge member 120 has a wedge-shaped tooth structure to surround the tension member 10 and increase frictional force with the tension member 10 on an inner surface thereof, and becomes smaller from one end to the other end. It is provided to have an outer diameter.

The wedge member is composed of a plurality of independent wedges 120, so that it can be easily separated when removing the tension member 10 later. That is, a plurality of wedges are provided so as to exist independently without being bound to each other by a rubber ring or the like.

The fixing coupling member 110 is a member provided in a substantially cylindrical shape having a hole 111 to allow the tension member 10 and the wedge member 120 to be inserted into a central portion thereof.

The hole 111 of the fixing member 110 includes a large diameter portion 111a formed at one end portion and a small diameter portion 111b formed at the other end portion thereof, and the small diameter portion 111b is formed from the small diameter portion 111b to the large diameter portion 111a. It is provided in a shape that gradually increases in diameter.

That is, the hole 111 is formed to correspond to the outer diameter of the wedge member 120, and the wedge member 120 is inserted into the hole 111 of the fixing coupling member 110 while the tension member 10 is wrapped. The wedge member 120 can further compress the tension member 10 due to the shape of the hole 111.

Body screw portion 118 is formed on the outer surface of the fixing coupling member 110 is screwed with the housing screw portion 171 of the fixing housing 170 to be described later.

On the other hand, the fixing housing 170 is a device fixed to the lower end of the excavation hole (H), one portion of the fixing housing 170 is a housing coupling portion provided to be coupled to the fixing coupling member 110 and the other work The part is a housing space S having a space of a predetermined size.

The housing coupling portion may exist in various ways. In this embodiment, the housing coupling portion is shown as a housing screw portion 171 provided to be screwed with the body screw portion 118 formed on the outer surface of the fixing coupling member 110. .

The housing coupling portion may be provided as a shape that can be forcibly fitted not only the housing screw portion 171 for screwing, but also the fixing coupling member 110.

On the other hand, the outer surface of the fixing housing 170 is provided with a housing groove (R) to be fixed in the excavation hole (H) it is possible to increase the friction force when the grout material is filled.

Moreover, it is preferable to use the tension material 10 in the state provided with the protective pipe 11 and the acupressure body 12 together.

That is, as shown in Figure 3, the tension member 10 is preferably inserted into the excavation hole (H) in the state inserted into the protective tube (11).

The protective tube 11 is to protect the tension member 10 may have a plastic material, a ceramic material or a metal material.

By enclosing the tension member 10 with the protective tube 11, when the tension member 10 is removed after the grouting operation, the grout material does not affect the tension member 10, and thus the tension member 10 may be easily removed. have.

In addition, it is preferable to provide a pressure-bearing member 12 together with the protective tube 11 or separately from the protective tube 11 so as to increase the frictional force on the grout material.

On the other hand, the tension member removable fixing unit according to the present embodiment is preferably to include a cover 140, washer 150 and elastic ring 160, as shown in FIG.

The elastic ring 160 is inserted into the tension member 10 to support the lower ends of the plurality of wedges 120, and the plurality of wedges 120 are inserted into the body when the fixing unit is inserted into the excavation hole H. It serves to support the member from being separated from the hole of the member.

The elastic ring 160 may be provided as any material, such as a rubber material, a plastic material, or a metal material.

The washer 150, as shown in Figure 3 is inserted between the tension member 10 is provided between the fixing member 110 and the protective tube 11, the elastic ring at the time of removal of the tension member (10) 160 to prevent the inlet to the protective tube. This will be described later.

On the other hand, the cover 140, as shown in Figure 3 is provided to cover a portion or all of the upper end of the fixing coupling member 110 coupled to the fixing housing 170.

That is, when the grout material is filled into the excavation hole (H), the grout material is introduced into the fixing coupling member 110 through the hole 111 at the top of the fixing coupling member 110 to adversely affect the removal of the tension member 10. It is to prevent that.

On the other hand, with reference to Figures 4 to 12 will be described in more detail with respect to the soil nailing method using a manual tensioning device having a configuration as described above and a fixing unit.

First, as shown in FIG. 4, the drilling hole H is drilled with respect to the ground G. At this time, the width or width of the excavation hole (H) is to be made to a suitable size in consideration of the size of the fixing unit.

After drilling the drilling hole (H), the fixing unit (F) is assembled to the tension member (10) as shown in FIG.

That is, the plurality of wedges 120 are placed on the tension member 10 and inserted into the holes 111 of the fixing coupling member 110 until the plurality of wedges 120 are temporarily fixed to the plurality of wedges 120. The fixing coupling member 110 is coupled to the fixing housing 170 in a state where the elastic ring 160 is inserted into the tension member 10 so that the elastic ring 160 is positioned at the lower end of the elastic ring 160.

At this time, the hole 111 of the fixing coupling member 110 is preferably coupled to the narrow diameter up and the wide diameter down. The plurality of wedges 120 may be inserted through a wide portion of the diameter of the fixing coupling member 110.

Then, the washer 150 is inserted into the tension member 10, the cover 140 is covered, and the protection tube 11 and the pressure bearing body 12 are fitted.

Here, the acupressure body 12 may be inserted into two or more according to the length of the tension member 10 or may use one long acupressure body.

The fixing unit F assembled as described above is inserted to be fixed to the bottom of the excavation hole H, as shown in FIG.

And grout material (13), such as cement mortar and the like is injected into the excavation hole (H) as shown in Figure 6 and cured (Curing) it.

At this time, the grout material 13 is preferably to be injected by a suitable height in consideration of the installation of the manual tensioning machine.

On the other hand, after fixing the fixing unit (F) and grouting (Grouting) as described above, as shown in Figs.

That is, as shown in Figure 8 and 9, the plate portion 30b of the tension nut member 30 is fixed to the ground (G) using the fasteners 35 and the nut screw portion of the center of the tension nut portion (30a) The tension member 10 is positioned at the center of the (32).

And while the tension member 10 is inserted into the hole 43 in the center of the tension bolt portion 40a of the tension bolt member 40, the bolt screw portion 42 of the tension bolt portion 40a is a nut of the tension nut portion 30a. Screw on the threaded portion (32).

At this time, the tension bolt member 40 is preferably installed so that the lower end of the tension bolt portion 40a reaches the lower end of the tension nut portion 30a, as shown in FIG.

On the other hand, the body member 51 is accommodated in the receiving portion 44 of the receiving body portion 40b of the tension bolt member 40, wherein the hole 52 of the body member 51 is inserted into the tension member 10 Make sure the wider part is up and the narrower part is down.

And the wedge member 55 is inserted into the wide portion, the wedge member 55 is provided with a plurality of fixing wedge is fixed to each other by the fixing ring 55a and the hole 52 of the body member 51 It is provided to compress the tension member 10 while being inserted into the).

At this time, between the fixing wedge of the plurality of fixing wedges of the wedge member 55 and the other fixing wedge is inserted so that the pin member 59 protruding on the inner surface of the body member 51 is located.

This is to allow the wedge member 55 to rotate together as the trunk member 51 rotates when the tension member 10 is removed, which will be described later.

And when the body member 51 is accommodated in the receiving body portion 40b, the coupling groove 51c provided in the body member 51 substantially coincides with the through hole 47 provided in the receiving body portion 40b. Preferably. The fixing member 60 is coupled to the through hole 47.

On the other hand, the wedge member 55 is inserted into the hole 52 of the trunk member 51 in a state in which the tension member 10 is wrapped (when the wedge member 55 uses a separate mechanism, the hole of the trunk member 51 ( 52), and the cover member 57 is coupled to cover the upper end of the body member 51 to fix it.

At this time, the cover member 57 and the body member 51 is preferably provided to be screwed together.

6 to 8 illustrate a case in which the manual pulling machine is installed after the grouting operation in the state in which the fixing unit F is fixed in the excavation hole H, but is not necessarily limited to the construction order.

In other words, while fixing the fixing unit (F) in the drilling hole (H), the manual tensioner is assembled and installed directly to the tension member 10, and then injected into the drilling hole (H) through a separate hose (Hose), etc. It is also possible to make grouting work.

On the other hand, as shown in Figure 9 after the mounting of both the manual tensioner and the fixing unit is completed, the work to tension the tension member 10 is performed.

That is, as shown in FIG. 10, the tension bolt member 40 is rotated in one direction, in which the tension bolt member 40 is rotated in the unwinding direction from the tension nut member 30.

Therefore, the tension bolt member 40 in the drawing gradually rises at the same time as the rotation. At this time, the fixing member 60 is to be released so that the crimping state for the body member 51 is released.

That is, the fixing member 60 does not affect the body member 51 so that the body member 51 and the receiving body portion 40b act independently of each other.

As such, when the tension bolt member 40 is rotated to move upward in the drawing, the plurality of wedges 120 inserted in the fixing coupling member 110 are further fitted upward in the drawing along the tension member 10. The tension member 10 is compressed to be larger to fix the tension member 10 so as not to escape.

Therefore, the tension member 10 having one end fixed in the fixing unit is tensioned while pushing the body member 51 upward in the drawing while the tension bolt member 40 rotates at the other end.

At this time, in order to effectively rotate the tension bolt member 40 with a greater force, a tool such as a spanner device may be used.

That is, the tension member 10 may be more effectively tensioned by inserting a tool such as a spanner device into the tool coupling portion 46 of the tension bolt member 40.

Therefore, by tensioning the tension member 10, the plate portion 30b of the tension nut member 30 can effectively support the ground (G).

If all the tension of the tension member is made by the method as described above, it is possible to continue the civil engineering work or construction work.

On the other hand, after all civil works or construction work is finished, all the tension members inserted into the ground should be removed.

Removal of such a tension member will be described with reference to FIGS. 11 and 12.

In order to remove the tension member 10, as illustrated in FIG. 11, a plurality of wedges 120 inserted into the fixing coupling member 110 must be separated from the hole 111.

To this end, by applying an impact using a tool such as a hammer or a hammer to the upper end of the tension member 10 in the state as shown in Figure 10 so that the tension member 10 can move a predetermined distance downward as shown in FIG. The plurality of wedges 120 inserted into the fixing coupling member 110 may be pulled out.

However, the impact force applied to the upper end of the tension member 10 may not be transmitted to the lower end of the tension member 10. In this case, the wedge 120 moves downward when the tension member 10 is rotated. It can be easily separated from the hole 111 of.

That is, as shown in FIG. 11, while the tensioning bolt member 40 is rotated in the opposite direction (the direction opposite to when tensioning the tensioning member), the tension member 10 moves downward in the drawing (the housing space portion of the fixing housing 170) S) move inward).

At this time, the fixing member 60 is tightened so that the fixing member 60 is fitted into the coupling groove 51c of the trunk member 51 so that the trunk member 51 is fixed to the receiving body portion 40b, and then the tension bolt. Rotate the member 40.

When the body member 51 is fixed by the fixing member 60 as described above, when the tension bolt member 40 is rotated, the body member 51 also rotates together and the wedge member 55 fitted to the body member 51 is rotated. The tension member 10 is rotated together with a high friction force.

Accordingly, as shown in FIG. 11, when the tension bolt member 40 is rotated in the opposite direction, the tension bolt member 40 gradually moves downward in the drawing, and the tension member 10 moves downward in the drawing while being rotated to facilitate the wedge 120. It is possible to cause the crimp to be released.

At this time, the tension bolt member 40 does not need to rotate by the distance traveled when tensioning the tension member 10, the wedge 120 need only rotate as necessary to separate from the fixing coupling member (110).

When the wedge 120 is separated from the fixing coupling member 110 as described above, the separated wedge 120 is accommodated in the housing space S of the fixing housing 170.

Then, the fixing member 60 is released to separate the fixing member 60 from the coupling groove 51c of the body member 51, and the body member 51 is separated from the receiving portion 44 as shown in FIG. Remove the tension member 10.

At this time, the elastic ring 160 inserted into the tension member 10 is caught by the narrow diameter portion of the hole 111 of the fixing member 110 when the tension member 10 is removed or by the washer 150. Separated from 10) is accommodated in the housing space (S).

Through the process as described above it is possible to remove the tension member 10 simply and easily.

On the other hand, with reference to Figure 13 and 14 will be described with respect to the manual tensioning machine and the fixing unit used in the small nailing method according to an embodiment of the present invention.

Manual tensioner and fixing unit shown in Figure 13 and 14 relates to the soil nailing method to be equipped with a plurality of tension members at the same time to form a ground anchor body and to tension and remove several tension members in sequence will be.

As shown in FIG. 13, the manual tensioner using the plurality of tension members 1, 2, 3, and 4 includes a plurality of tension bolt members 40-1, 40-2, and 40-in the multiple tension nut members 100. 3, 40-4, respectively, and the compression unit (50-1, 50-2, 50-3, 50) to each tension bolt member (40-1, 40-2, 40-3, 40-4) And -4) respectively.

The tension bolt members 40-1, 40-2, 40-3, 40-4 and the pressing units 50-1, 50-2, 50-3, 50-4 are shown in FIGS. 10 to 15. Since the tension bolt member 40 and the pressing unit 50 have the same configuration and have the same effect, detailed description thereof will be omitted.

The multi-tensile nut member 100 includes a multi-tension nut portion 100a and a plate portion 100b.

The multi-tension nut portion 100a includes a plurality of nut screw portions 101, 102, 103, 104 to which each of the plurality of tension bolt members 40-1, 40-2, 40-3, 40-4 can be screwed together. ).

Wherein each tension bolt member (40-1, 40-2, 40-3, 40-4), each pressing unit (50-1, 50-2, 50-3, 50-4) and the like are shown in FIG. Since the tension bolt member and the pressing unit have substantially the same configuration, detailed description thereof will be omitted.

Meanwhile, as shown in FIG. 14, the protective tubes 1a, 2a, 3a and 4a and the pressure bearings 1b, 2b, 3b and 4b are respectively coupled to the plurality of tension members 1, 2, 3 and 4. .

The tension members 1, 2, 3, and 4 cover 140-1, 140-2, 140-3, 140-4, washers 150-1, 150-2, 150-3, 150-4, Fixing coupling members 110-1, 110-2, 110-3, 110-4, wedge members 120-1, 120-2, 120-3, 120-4, and elastic rings 160-1, 160 -2, 160-3, 160-4, etc. in order, and in the combined state, the fixing coupling members 110-1, 110-2, 110-3, 110-4, respectively, multiple coupling fixing housing The coupling portion 201, 202, 203, 204 of the (200).

Although not shown in the drawings, a housing space portion having a predetermined size is also provided inside the multi-coupled fusing housing 200. And the housing groove (R) is provided on the outer surface of the multi-coupling fixing housing 200 it is possible to further increase the friction force when the multi-coupling fixing housing 200 is fixed in the excavation hole (H) grouting .

Here, each of the fixing member, the wedge member, the elastic ring, the washer, the cover, and the like have substantially the same configuration as that shown in FIG. 3, and thus a detailed description thereof will be omitted.

On the other hand, with reference to Figures 15 to 18 will be described for the soil nailing method using the manual tensioning machine and the fixing unit shown in Figs.

First, drilling the drilling hole (H) to assemble a plurality of tension members in the fixing unit to be fixed in the drilling hole (H).

Then grout by injecting grout material into the excavation hole (H) and then assembling the manual tensioner, or assembling and installing the manual tensioner first, and grouting by injecting grout material into the excavation hole (H) with a hose or the like. .

The assembly of the fusing unit or the manual tensioning machine according to the present embodiment is basically the same as the assembly of the fusing unit and the manual tensioning machine shown in Figs. 5 and 8, except that in this embodiment, There is a difference that a plurality of fixing coupling members (110-1 to 4) and a plurality of tension members (1 to 4), etc. are coupled to the multi-combination fixing housing 200, one multi-tension nut member when assembling the manual tensioning machine ( There is a difference that the plurality of tension bolt members 40-1 to 4 and the compression units 50-1 to 4 are coupled to 100.

After the assembly and grouting of the fixing unit and the manual tensioning machine are completed as shown in FIG. 15, a process of tensioning each of the plurality of tension members 1 to 4 is performed as shown in FIG. 16.

As shown in FIG. 16, the tension of each tension member rotates each tension bolt member 40-1 to 4 in a direction in which the screw coupling is released from the multi-tension nut portion 100a of the multi-tension nut member 100. As shown in FIG. While moving.

At this time, the tensioning process performed for each tension member 1 to 4 is the same as the tensioning process for one tension member shown in FIG.

And as shown in FIG. 16, when each tensioning bolt member 40-1 to 4 is rotated, each of the fixing members 60-1 to 4 is in an unrolled state, that is, in a state of being separated from the crimping unit. Preferably, each of the compression units 50-1 to 4 does not rotate when the bolt members 40-1 to 4 rotate.

Each of the compression units 50-1 to 4 is pushed up while the tension bolt members 40-1 to 4 move upward in the drawing to tension each tension member 1 to 4.

On the other hand, in the case of removing each of the tension members (1 to 4), as shown in Figure 17 by tightening each of the fixing member (60-1 to 4), respectively in a state of fixing each of the pressing unit (50-1 to 4) The tension bolt member (40-1 to 4) of the rotation (rotate in the opposite direction at the time of tension).

At this time, each pressing unit (50-1 to 4) also moves in the downward direction on the drawing while rotating with each tension bolt member (40-1 to 4).

As the tension members 1 to 4 move downward in the drawing, that is, each lower end portion of the tension members 1 to 4 is inserted into the fixing member 110-1 to 4 by moving a predetermined distance into the housing space S. The wedge members 120-1 to 4 which were present are separated and separated into the housing space S. FIG.

After each of the wedge members 120-1 to 4 is separated from the housing space S, the fixing members 60-1 to 4 are loosened as shown in FIG. 18, and the pressing units 50-1 to 4 are respectively released. ) Is removed from the receiving portions 44-1 to 4, and the tension members 1 to 4 are removed.

At this time, the elastic rings 160-1 to 4 inserted in the tension members 1 to 4 are caught by the washers 150-1 to 4 and separated to remain in the housing space S.

Through the process as described above it is possible to have a plurality of tension members at the same time construction by the soil nailing method using a manual tensioner and a fixing unit.

1 is a view schematically showing an example constructed by the small nailing method according to an embodiment of the present invention.

2 is an exploded perspective view showing a manual tensioning machine used in the small nailing method according to an embodiment of the present invention.

3 is an exploded perspective view showing a fixing unit used in the small nailing method according to an embodiment of the present invention.

4 to 12 are views showing the construction process for the soil nailing method using the manual tensioner and the fixing unit shown in FIGS. 2 and 3, respectively.

Fig. 13 is an exploded perspective view showing a manual tensioning machine used in the small nailing method according to another embodiment of the present invention.

14 is an exploded perspective view showing a fixing unit used in the small nailing method according to another embodiment of the present invention.

15 to 18 are views showing the construction process for the soil nailing method using the manual tensioning machine and the fixing unit shown in FIGS. 13 and 14, respectively.

Claims (19)

In the removable soil nailing method using a manual tensioner and a fixing unit, Drilling holes in the ground; Inserting the plurality of tension members into the excavation hole by assembling a fixture to each of the plurality of tension members, and fixing the fixing unit provided in the plurality of fixing units to the multiple coupling fixing housing to be fixed inside the excavation hole; Grouting by filling a grout material into the excavation hole; Assembling a pressing unit and a tension bolt member at the other end of each of the plurality of tension members and assembling a manual tensioner by coupling the plurality of tension bolt members to the multi-tension nut member; Actuating the passive tensioner to tension each of the plurality of tension members; And Operating the manual tensioner to remove the plurality of tension members, respectively; Including, The fixing unit includes a plurality of fixing members having a plurality of wedge members, a plurality of fixing members having holes smaller in diameter from one end to the other end, and a housing space having a predetermined size. Assembling the fixing unit, Inserting the fixing coupling members into the tension members, respectively; Allowing the wedge member to be inserted into the hole of the fixing coupling member in a state in which each of the wedge members surrounds each of the tension members; And a plurality of fixing coupling members coupled to the multiple coupling fixing housing such that the lower ends of the fixing coupling members are exposed to the housing space. Ring method. delete delete delete delete delete delete delete delete delete delete delete delete delete delete The method of claim 1, Fitting an elastic ring to each tension member to support each of the wedge members; Inserting a washer in each of the tension member and covering the cover with a cover characterized in that the removable nailing method using a manual tensioner and a fixing unit. The method of claim 1, The manual tensioner includes a plurality of compression units, a plurality of tension bolt members including a receiving body portion and a tension bolt portion, and a multiple coupling tension nut member including a plate portion and a multi-tension nut portion, Assembling the manual tensioner, Installing the multi-coupled tension nut member such that the plate part is fixed to the ground and the multi-tension nut part is disposed in an excavation hole; Installing the plurality of tension bolt members by screwing the plurality of tension bolt members to the multi-tension nut member while allowing each of the plurality of tension members to be inserted into holes in the respective tension bolt portions; Removing each of the plurality of pressing units to each of the tension members so that each of the pressing units is accommodated in the receiving body portion of each of the tension bolt members. Nailing method. 18. The method of claim 17, Tensile the tension member, Releasing the fixing member of each of the tension bolt members to release the fixing state of each pressing unit and the receiving body; And manually tensioning each tension member by rotating each of the plurality of tension bolt members in one direction to move each of the compression units while moving in a direction to be separated from the multi-tension nut member. And removable soil nailing method using a fixing unit. The method of claim 18, wherein removing the tension member, Fixing each of the pressing units by tightening the fixing member of each of the tension bolt members; Each of the plurality of tension bolt members is rotated in the opposite direction to move in a direction coupled to the multi-tension nut member such that the lower ends of each of the plurality of tension members move a predetermined distance into the housing space of the fixing housing. Separating the wedge member from the hole of each fixing member; And removing the plurality of tension members from the excavation hole, respectively, by separating the pressing units from the respective receiving body parts.

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