KR102435633B1 - ground anchor device for a removable type from a ground insert hole - Google Patents

Abstract

The present invention is a technique for smoothly removing a stranded member from a caulking part of a pipe when removing a stranded member from a removable anchor device, and is located in a caulking area that blocks the inside and outside of the pipe at the entrance part of the pipe into which the stranded member is inserted. The present invention relates to a technology for supporting a caulking pressure on a twisted-pair member in the process of removing the twisted-pair member in the pipe by providing a pressure pipe member in the form of enclosing the twisted-pair member. According to the present invention, after the hole packer member is expanded from the outer surface of the outer tube by configuring the valve fixing ring member provided with the backflow blocking convex embossing member to elastically press the pressing hole of the outer tube, the inside of the hole packer member There is an advantage of blocking the backflow of the high-pressure grout material in the filled state from the hole packer member to the inside of the outer tube.

Description

Removable anchor device {ground anchor device for a removable type from a ground insert hole}

The present invention relates to a technique for smoothly removing a stranded member from a caulked portion of a tube when removing the stranded member from a removable anchor device.

More specifically, the present invention is a process of removing the stranded member in the pipe by providing a pressure pipe member in the form of wrapping the stranded member in the caulking area that blocks the inside and outside of the pipe at the entrance part of the pipe into which the stranded member is inserted to a technique for allowing the pressure pipe member to bear the caulking pressure on the stranded member in the present invention.

In general, as one method of strengthening the ground weakened by construction, etc., a plurality of holes of a predetermined depth are drilled in the ground, and then anchor construction may be performed for each hole.

In such anchor construction, grout material is injected and hardened into each hole. will go through a process.

The tensioning process is a process of pulling the stranded wire or steel wire provided in the anchor device based on the entrance part of the hole after the grout material is injected in the state that the stranded wire or steel wire is inserted into the hole along the longitudinal direction of the hole. According to the process, the effect of solidly aggregating the grout material filled in the hole can be expected.

Here, if the stranded wire or steel wire subjected to the tensioning process is removed later, it will be a removable anchor device, and if it is a type in which the stranded wire or steel wire subjected to the tensioning process is left as it is in the hole, it will be a permanent anchor device.

At this time, if we look at the case of the removable anchor device, in order to remove the stranded wire or steel wire from the inside of the hole, it must be coated in advance when the stranded wire or steel wire to be removed is manufactured. You can easily pull it out and remove it.

However, when the grout material is filled in the hole and undergoes a tensioning process, a caulking member may be provided at the entrance portion of the hole in order to block the backflow of the grout material filled in the hole.

At this time, since the caulking member is also a pattern that blocks the passage of the hole by filling and expanding the grout material inside, the stranded wire or steel wire is also greatly compressed by the expansion pressure of the caulking member in the process of expanding the caulking member. There is a disadvantageous problem in that the stranded wire or steel wire cannot be smoothly pulled out when pulled from the outside of the hole in order to remove the stranded wire or the steel wire thereafter.

Accordingly, by disposing the pressure pipe member in a form surrounding the stranded wire or steel wire at a position corresponding to the caulking member, the pressure due to the expansion of the caulking member is directly applied to the stranded wire or steel wire when the caulking member is expanded. It is required to implement a technology that can solve the problems of the prior art as described above by blocking the application of the

The present invention has been proposed in view of the above, and an object of the present invention is to provide a pressure pipe member in the form of enclosing the stranded member in the caulking area in the pipe, and in the process of removing the stranded member in the pipe, the pressure pipe member An object of the present invention is to provide a removable anchor device that enables smooth removal of the stranded member from the inside of the tube by supporting the caulking pressure on the stranded member.

In addition, it is an object of the present invention to block the backflow of the high-pressure grout material filled inside the hole packer member from the hole packer member to the pressing hole of the outer tube after the hole packer member is expanded on the outer surface of the outer tube. To provide an anchor device.

In addition, it is an object of the present invention to provide a removable anchor device that allows the process of blocking the reverse flow in the pressurized hole of the outer tube to be performed stably without error.

In order to achieve the above object, the present invention communicates the free field corresponding to the rear end of the insert hole with the anchorage corresponding to the front end of the insert hole formed in the ground to reinforce the ground through the injection of the grout material while being inserted into the insert hole. As a removable anchor device, a plurality of pressurizing holes (111, 111 ') the outer tube 110 is formed along the longitudinal direction of its body; A plurality of removable stranded wire members 120 that are inserted into the inner side of the outer tube from the free field to the anchorage and are removed after a tensile process after injection of the grout material into the outer tube; a plurality of pressure pipe members 130 disposed in a shape surrounding the removable stranded wire member on the inside of the outer tube corresponding to the inlet portion of the insert hole to maintain their outer shape from external force; a pipe packer member 140 for caulking the external pipe in the form of enclosing each pressure pipe member on the inside of the external pipe corresponding to the inlet portion of the insert hole; a backflow blocking member for blocking the backflow of the grout material injected into the outer tube by caulking the space between the removable stranded wire member and the pressure pipe member; The hole packer member 160 for caulking between the outer tube and the insert hole as it is disposed around the outer tube to communicate with the pressurized hole and is expanded by the grout material ejected through the pressurized hole; may be configured to include have.

And, it is arranged in a ring band type on the outer wall of the outer tube to cover the pressing hole between the outer surface of the outer tube and the hole packer member, and elastically expands when the ejection pressure of the grout material through the pressing hole from the inside of the outer tube occurs. The valve fixing ring member 170, which is integrally provided with a reverse flow blocking convex embossing member 171 protruding inward toward the inlet portion of the pressing hole on its inner wall corresponding to the pressing hole, can be configured to further include have.

Here, the valve fixing ring member 170 may further include an expansion guide concave concave-convex member 172 which is depressed inwardly on its outer surface corresponding to the reverse flow blocking convex embossing member.

On the other hand, the pressure pipe member 130, flange members (131, 132) that protrude outward along the circumference of the body on the outer surface of both ends of the pipe packer member to define the expansion area of the pipe packer member in the process of expanding. can be provided.

The present invention is provided with a pressure pipe member of a type surrounding the removable stranded member disposed inside the outer tube, so that the pressure pipe member is attached to the stranded member in the process of removing the stranded member in the outer tube after the tensioning operation is completed. It shows the advantage of enabling the smooth removal of the stranded wire member from the inside of the outer tube by supporting the caulking pressure.

In addition, the present invention is configured to elastically press the pressing hole of the outer cylinder by the valve fixing ring member provided with the backflow blocking convex embossing member, so that after the hole packer member is expanded from the outer surface of the outer tube, the inside of the hole packer member It shows the advantage of blocking the backflow of the high-pressure grout material in the filled state from the hole packer member to the inside of the outer tube.

In addition, in the present invention, the valve fixing ring member expands and contracts by the elastic restoring force, and a plurality of backflow blocking convex embossing members formed on the inner wall of the valve fixing ring member expand and contract integrally with the valve fixing ring member to form an outer tube. It shows the advantage that the process of blocking the backflow in the pressurized hole of

[Figure 1] is an exemplary view of an insert hole formed in the ground,
[FIG. 2] is an exemplary view showing in cross section a state in which the pipe packer member and the hole packer member are contracted after the removable anchor device according to the present invention enters the insert hole;
[FIG. 3] is an exemplary view in cross section showing the expanded state of the pipe packer member and the hole packer member after the removable anchor device according to the present invention enters the insert hole;
[FIG. 4] is an enlarged view of an area in which the pressure pipe member and the pipe packer member are arranged in [FIG. 2],
[FIG. 5] is an enlarged view of an area in which the pressure pipe member and the pipe packer member are arranged in [FIG. 3],
[FIG. 6] is an enlarged view by extracting the area where the hole packer member is disposed in [FIG. 2];
[FIG. 7] is an enlarged view of an area in which the hole packer member is disposed in [FIG. 3],
[FIG. 8] is an enlarged view of an area in which the discharge hole and the valve fixing ring member are arranged in [FIG. 3],
[FIG. 9] is a view of the valve fixing ring member provided in the first embodiment of the present invention as viewed in the longitudinal direction of the outer tube;
[Fig. 10] is a view of the valve fixing ring member provided in the second embodiment of the present invention as viewed in the longitudinal direction of the outer tube.

Hereinafter, the present invention will be described in detail with reference to the drawings.

[FIG. 1] is an exemplary view of an insert hole formed in the ground. The insert hole 10 formed in the ground by work has an irregular inner diameter, but it can be conceptually represented as shown in [FIG. 1].

An anchor device is inserted into the insert hole 10 in the longitudinal direction of the insert hole 10, and after the insertion, the grout material is injected and hardened, so that the insert hole 10 and the ground around the insert hole 10 are can be strengthened

Here, the anchor device inserted into the insert hole 10 guides to effectively insert the grout material into the insert hole 10 , and guides the inserted grout material to firmly maintain the hardened state in the insert hole 10 .

And, in the anchor device inserted into the insert hole 10, if the stranded wire or steel wire provided in the anchor device is left as it is with the hardening of the grout material, it will be a permanent anchor device, but the stranded wire or steel wire is inserted into the insert hole in a state in which the grout material is hardened. If removed from (10), it will be a removable anchor device.

On the other hand, at the front end (inside) of the insert hole 10, the front end of the stranded wire or steel wire of the anchor device is called a so-called anchorage 11 that can maintain a fixed state, for example, by screwing, and the rear end of the insert hole 10 ( outside), the so-called free field 12, in which the rear end of the stranded wire or steel wire of the anchor device is movable, for example.

Here, in the case of the removable anchor device, the stranded wire or steel wire after the so-called tensioning process must be removed from the insert hole 10. A detailed look at the process of removing the stranded wire or steel wire is as follows.

When the stranded wire or steel wire in the tensioning process is subjected to a tensioning process of pulling the stranded wire or steel wire from the outside of the insert hole 10 as the tip portion thereof is maintained in a state fixed to the anchorage 11 by screwing, for example, the insert hole As the grout material injected into the inner side of (10) is compressed, the grout material can be effectively integrated with the inner wall of the insert hole (10).

And, when the tensile process is finished, the stranded wire or steel wire is removed from the insert hole 10 in a state in which the grout material is hardened to some extent. Release the screwed state in the insert hole 10 and then pull the stranded wire or steel wire from the outside of the insert hole 10 so that the core part of the stranded wire or steel wire wrapped in the sheath comes out of the grout material in the insert hole 10 be able to

Here, as the caulking member is expanded at the entrance and exit of the insert hole 10 before the grout material is injected into the insert hole 10 so that the grout material injected into the insert hole 10 does not flow backward, the insert hole 10 is ) after blocking the inlet part, the grout material is injected into the insert hole (10).

However, since the process of expanding the caulking member goes through a process of injecting grout material at high pressure inside the caulking member, in this process, the stranded wire or steel wire wrapped around the caulking member with the caulking member is also pressurized. .

At this time, the covering surrounding the stranded wire or the steel wire is integrated with the core part of the stranded wire or the steel wire by the expansion pressure of the caulking member.

As a result, there is a problem in that the core part of the stranded wire or steel wire cannot smoothly escape from the insert hole 10 during the removal operation of pulling the stranded wire or steel wire from the outside of the insert hole 10 after the tensile process.

Hereinafter, a removable anchor device according to the present invention for smoothly removing a stranded wire or a steel wire from the insert hole 10 after a tensile process will be described in detail.

[FIG. 2] is an exemplary view showing in cross section a state in which the pipe packer member and the hole packer member are contracted after the removable anchor device according to the present invention enters the insert hole, and [FIG. 3] is the removal according to the present invention It is an exemplary view showing the expanded state of the pipe packer member and the hole packer member in cross section after the anchor device enters the insert hole, and [Fig. It is an enlarged view by extracting an area, and [Fig. 5] is an enlarged view of extracting an area in which the pressure pipe member and the pipe packer member are arranged in [Fig. 3].

Referring to [Fig. 2] to [Fig. 5], the present invention provides a free field 12 corresponding to the rear end of the anchoring field 11 and the insert hole 10 corresponding to the front end of the insert hole 10 formed in the ground. ) as a removable anchor device for reinforcing the ground through injection of a grout material in a state inserted into the insert hole 10 through communication, the outer tube 110, the removable stranded wire member 120, the pressure pipe member 130, The tube packer member 140 and the hole packer member 160 may be included.

The outer tube 110 is inserted inside the insert hole 10 from the free field 12 to the anchorage field 11 as in [Fig. 2] to [Fig. 5] and may be configured in the form of a hollow pipe. And a plurality of pressing holes (111, 111') penetrating the body so as to discharge the grout material injected from the outside to the inside of the insert hole 10 may be formed along the longitudinal direction of the body itself. .

That is, the plurality of pressing holes 111 and 111 ′ penetrating the body of the outer tube 110 are holes formed in the outer tube 110 , and the grout material inside the outer tube 110 is outside the outer tube 110 . It serves as a passage to be ejected to the hole packer member 160 of the.

On the other hand, the outer tube 110 is formed long in the form of a hollow pipe so that the grout material injected from the outside into the inside of the body can be discharged into the inside of the insert hole 10, which is the outside, a plurality of along its longitudinal direction. Four discharge holes 112 and 112' may be formed.

In addition, the outer tube 110 may be preferably made of a metal material (eg, SUS), but may also be composed of a synthetic resin material (eg, PVC, PP, PE, etc.) employed in various pipes.

Here, when a plurality of hole packer members 160 are disposed along the longitudinal direction of the outer tube 110 , the insert hole 10 in which the outer tube 110 is inserted is divided into multi-stage empty spaces along the longitudinal direction. state can be maintained.

At this time, when the grout material is ejected into the insert hole 10 through the discharge holes 112 and 112' formed in a plurality of the outer tube 110 along the longitudinal direction of the outer tube 110, the plurality of hole packer members 160 Accordingly, the space of the insert hole 10 can be divided into multiple stages, and accordingly, the grout material injected into the insert hole 10 can effectively press the insert hole 10 . (See [Fig. 8])

To this end, the hole packer member 160 is disposed in a shape surrounding the outer tube 110 so as to communicate with the pressing holes 111 and 111 ′ of the outer tube 110 and is ejected through the pressing holes 111 and 111 ′. It is expanded by the grout material. (See [Fig. 6] and [Fig. 7])

A plurality of removable stranded wire members 120 are inserted into the inner side of the outer tube 110 from the free field 12 to the anchorage field 11 as in [Fig. 2] to [Fig. 5], and insert holes 10 ), perform the tensile process on the grout material to be injected.

Here, the removable stranded wire member 120 may be removed after the grout material is injected into the outer tube 110 and then subjected to a tensile process.

To this end, the removable stranded wire member 120 may be manufactured by being covered with a coating of a synthetic resin material surrounding its core part, and preferably, a lubricant (eg, grease) may be applied between the coating and the core part.

A plurality of pressure pipe members 130 may be provided to correspond to the number of removable stranded wire members 120 as in [Figs. As it is disposed in a shape surrounding the removable stranded wire member 120 on the inside of the pipe pipe 110 , it can maintain its external shape from external force such as expansion of the pipe packer member 140 .

To this end, the pressure pipe member 130 may be preferably made of a metal material (eg, SUS), but may also be made of a synthetic resin material (eg, PVC, PP, PE, etc.) employed in various pipes.

In this way, as the pressure pipe member 130 maintains its external shape despite external force such as expansion of the pipe packer member 140 , the removable stranded wire member 120 is pressed by the external force of the pipe packer member 140 . can block it.

Meanwhile, the pressure pipe member 130 may preferably include flange members 131 and 132 .

Flange members (131, 132) of the pressure pipe member 130 to partition the expansion area of the pipe packer member 140 in the process of the pipe packer member 140 is expanded as in [Fig. 4] and [Fig. 5]. It may be formed to protrude outward along the circumference of the pressure pipe member 130 on the outer surface of both ends.

That is, due to the provision of the flange members 131 and 132 , the position of the pipe packer member 140 can be maintained without being separated from the outer surface of the pressure pipe member 130 during the process or after the expansion of the pipe packer member 140 .

The pipe packer member 140 surrounds each pressure pipe member 130 on the inside of the outer tube 110 corresponding to the inlet portion of the insert hole 10 as in [Fig. 2] to [Fig. 5]. The outer tube 110 is caulked.

That is, when the tube packer member 140 is expanded to block the inlet portion of the outer tube 110 and then the grout material is injected inside the outer tube 110 , the grout material is transferred to the inlet portion of the outer tube 110 . It will be possible to maintain a high-pressure state that can be sprayed into the pressurizing holes (111, 111') or the discharge holes (112, 112') from the inside of the outer tube 110 without a backflow.

Referring to [Fig. 4] and [Fig. 5], the backflow blocking member (not shown) is injected into the outer tube 110 by caulking the separation space between the removable stranded wire member 120 and the pressure pipe member 130. Blocks the backflow of grout material to the outside.

To this end, the backflow blocking member may be made of liquid epoxy and filled inside the pressure pipe member 130 .

As a result, after the tube packer member 140 is expanded, the grout material injected into the outer tube 110 may be prevented from flowing back into the pressure pipe member 130 as well.

The hole packer member 160 may be disposed in a shape surrounding the outer tube 110 so as to communicate with the pressing holes 111 and 111', and by the grout material ejected through the pressing holes 111 and 111' [Fig. 3], as it expands, caulking is performed between the outer tube 110 and the insert hole 10 . (See [Fig. 6] and [Fig. 7])

[Fig. 6] is an enlarged view of an area in which the hole packer member is arranged in [Fig. 2], and [Fig. 7] is an enlarged view of an area in which the hole packer member is arranged in [Fig. 3]. and [FIG. 8] is an enlarged view of an area in which the discharge hole and the valve fixing ring member are disposed in [FIG. 3].

Referring to [Fig. 6] to [Fig. 8], the removable anchor device according to the present invention may be configured to further include a valve fixing ring member (170).

The valve fixing ring member 170 may be configured as a ring band type that elastically surrounds the outer tube 110 , like a rubber ring, and may be arranged in plurality along the longitudinal direction of the outer tube 110 .

That is, the valve fixing ring member 170 is between the outer surface of the outer tube 110 and the hole packer member 160 to cover the pressing holes 111 and 111 ′ at the corresponding positions [Fig. 6] to [Fig. 8] It may be arranged in a ring band type on the outer wall of the outer tube 110 as in.

In addition, the valve fixing ring member 170 opens the pressing holes 111 and 111' while elastically expanding when the ejection pressure of the grout material is generated from the inside of the outer tube 110 through the pressing holes 111 and 111'.

To this end, the valve fixing ring member 170 may include a backflow blocking block embossing member 171, and the backflow blocking block embossing member 171 is a pressurized hole ( The inner wall of the valve fixing ring member 170 corresponding to 111 and 111' may protrude inwardly toward the inlet portion of the pressing hole 111 and 111'.

As a result, the valve fixing ring member 170 is elastic as shown in [Fig. As a result, it forms a state in close contact with the outer surface of the outer tube 110, and the reverse flow blocking block embossing member 171 has a shape to elastically push the pressing holes 111 and 111'.

Then, when the grout material is injected from the pipe injection hose 220 through the pressing holes 111 and 111' of the outer tube 110, the valve fixing ring member 170 elastically expands as shown in [Fig. 7]. While being separated from the outer surface of the outer tube 110, the backflow blocking block embossing member 171 is also spaced apart from the pressurizing holes 111 and 111' as in [Fig. The grout material may be injected into the hole packer member 160 while passing through the pressing holes 111 and 111 ′ of the outer tube 110 .

At this time, when the injection of grout material from the pipe injection hose 220 to the pressure holes 111 and 111' is stopped, the valve fixing ring member 170 is in close contact with the outer surface of the outer tube 110, and the backflow blocking block is embossed. The member 171 also elastically pushes and blocks the pressing holes 111 and 111'.

Here, the reverse flow blocking block embossing member 171 integrally formed with the valve fixing ring member 170 in the process in which the valve fixing ring member 170 is elastically contracted and expanded together with the valve fixing ring member 170 In one piece, the contraction and expansion can be made elastically.

To this end, the valve fixing ring member 170 and the backflow blocking block embossing member 171 may be made of, for example, a synthetic resin material having elasticity, and may be manufactured by injection molding or extrusion molding.

That is, in the discharge hole (112, 112') portion of the outer tube 110 for discharging the grout material to the insert hole 10, as in [Fig. 6] and [Fig. 7], the valve fixing ring member 170 is other As it is disposed in a shape surrounding the passage 110 , it is possible to block the backflow of the grout material discharged to the discharge holes 112 and 112 ′.

Here, as the grout material is injected into the outer tube 110, when the ejection pressure of the grout material is generated from the inside of the outer tube 110 through the discharge holes 112 and 112', the valve fixing ring member 170 is [Fig. ], the discharge holes 112 and 112' are opened while being elastically expanded as shown in FIG.

And, as the injection of the grout material into the outer tube 110 is stopped, the ejection pressure of the grout material through the discharge holes 112 and 112' from the inside of the outer tube 110 is weakened, the valve fixing ring member 170 is burnt. While sexually contracted, the discharge holes 112 and 112' are elastically closed again.

[FIG. 9] is a view of the valve fixing ring member provided in the first embodiment of the present invention as viewed in the longitudinal direction of the outer tube.

As shown in [Fig. 9], the valve fixing ring member 170 according to the first embodiment of the present invention may include the reverse flow blocking block embossing member 171 integrally on its inner wall as seen above.

As a result, as the grout material ejection pressure from the pressing holes (111, 111') is weakened as in [Fig. 6], the hole packer member 160 is contracted or as in [Fig. 7], the pressing holes 111, 111, When the hole packer member 160 expands as the grout material ejection pressure from can

[Fig. 10] is a view of the valve fixing ring member provided in the second embodiment of the present invention as viewed in the longitudinal direction of the outer tube.

As shown in [Fig. 10], the valve fixing ring member 170 according to the second embodiment of the present invention may have the reverse flow blocking block embossing member 171 integrally provided on its inner wall as seen above, and the reverse flow blocking An expansion guide concave-convex member 172 that is depressed inwardly on the outer surface of the valve fixing ring member 170 corresponding to the convex embossing member 171 may be further provided.

According to the second embodiment of the present invention as shown in [Fig. 10], the hole packer member 160 from the inside of the outer tube 110 through the pressing holes (111, 111') to expand as in [Fig. When the grout material is discharged, the expansion of the valve fixing ring member 170 from the outer surface of the outer tube 110 can be made more smoothly.

For example, in the valve fixing ring member 170 according to the second embodiment of the present invention, the cross-sectional thickness of the portion corresponding to the backflow blocking block embossing member 171 becomes thinner due to the expansion guide concave and convex member 172, so the pressure Even when the discharge pressure of the grout material through the balls (111, 111') is relatively lower than the case in which the valve fixing ring member 170 according to the first embodiment of the present invention is employed, the valve according to the second embodiment of the present invention The fixing ring member 170 may be smoothly expanded.

To this end, when the valve fixing ring member 170 according to the second embodiment of the present invention has a cross-sectional thickness of about 2 mm, the cross-section of the valve fixing ring member 170 in which the expansion guide concave and convex-convex member 172 is located The thickness is preferably configured in the range of approximately 1.8 mm to 2 mm.

10: insert hole
11: Settlement
12 : free field
110: exterior tube
111, 111': pressurized hole
112, 112': discharge hole
120: removable stranded wire member
130: pressure pipe member
131, 132: flange member
140: pipe packer member
160: hole packer member
170: valve retaining ring member
171: Backflow blocking convex embossing member
172: concave uneven member
210: pipe packer injection hose
220: pipe injection hose

Claims (4)

A removable anchor device for reinforcing the ground through injection of a grout material while being inserted into the insert hole by communicating the anchorage field corresponding to the front end of the insert hole formed in the ground and the free field corresponding to the rear end of the insert hole,
A plurality of pressing holes (111, 111') that are inserted inside the insert hole from the free field to the fixing field and penetrate the body so as to discharge the grout material injected into the insert hole from the outside into the insert hole. ) is an outer tube 110 that is formed along the longitudinal direction of the body;
A plurality of removable stranded wire members 120 that are inserted into the inner side of the outer tube from the free field to the anchorage and are removed after a tensile process after injection of the grout material into the outer tube;
a tube packer member 140 for caulking the outer tube in a form surrounding the removable stranded member from the inside of the outer tube corresponding to the inlet portion of the insert hole;
It is disposed in a shape surrounding the removable stranded wire member between the pipe packer member and the removable stranded wire member on the inside of the outer tube corresponding to the inlet portion of the insert hole, and its outer shape from the external force caused by the expansion of the tube packer member A plurality of pressure pipe members 130 to maintain;
a backflow blocking member for blocking the backflow of the grout material injected into the outer tube by caulking the space between the removable stranded wire member and the pressure pipe member;
A hole packer member 160 disposed in a shape surrounding the outer tube to communicate with the pressing hole and caulking between the outer tube and the insert hole as it is expanded by the grout material ejected through the pressing hole;
consists of,
The pressure pipe member 130,
A flange member (131, 132) protruding outwardly along the circumference of its body on the outer surface of its both ends so as to partition the expansion area of the pipe packer member in the process of expanding the pipe packer member by expansion Removable anchor device.
The method according to claim 1,
It is arranged in a ring band type on the outer wall of the outer tube to cover the pressing hole between the outer surface of the outer tube and the hole packer member, and elastically when the ejection pressure of the grout material through the pressing hole occurs from the inside of the outer tube. a valve fixing ring member 170 integrally provided with a reverse flow blocking convex embossing member 171 protruding inward toward the inlet of the pressing hole on its inner wall corresponding to the pressing hole while being expanded;
Removable anchor device, characterized in that it further comprises a.
3. The method according to claim 2,
The valve fixing ring member 170,
Removable anchor device, characterized in that it further comprises an expansion guide concave and concave-convex member 172 which is recessed inwardly on its outer surface corresponding to the backflow blocking convex embossing member.
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