KR101765536B1 - Removal apparatus of tension material for ground anchor - Google Patents

Removal apparatus of tension material for ground anchor Download PDF

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Publication number
KR101765536B1
KR101765536B1 KR1020150138447A KR20150138447A KR101765536B1 KR 101765536 B1 KR101765536 B1 KR 101765536B1 KR 1020150138447 A KR1020150138447 A KR 1020150138447A KR 20150138447 A KR20150138447 A KR 20150138447A KR 101765536 B1 KR101765536 B1 KR 101765536B1
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KR
South Korea
Prior art keywords
tensile material
hole
insertion hole
steel wire
piston
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KR1020150138447A
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Korean (ko)
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KR20170039389A (en
Inventor
윤용수
나병관
Original Assignee
주식회사 장평건설
윤용수
나병관
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Priority to KR1020150138447A priority Critical patent/KR101765536B1/en
Publication of KR20170039389A publication Critical patent/KR20170039389A/en
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Publication of KR101765536B1 publication Critical patent/KR101765536B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/801—Ground anchors driven by screwing
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/805—Ground anchors with deformable anchoring members
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20—Placing by pressure or pulling power

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The present invention relates to a tensile material removing device for a ground anchor, and more particularly to a tensile material removing device for a ground anchor which can remove a tensile material more easily from a perforation hole by pulling a part of a tensile material of a tensile material without hitting a tensile material inserted in the perforation hole .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ground anchor tensile material removing apparatus,

The present invention relates to a tensile material removing device for a ground anchor. More particularly, the present invention relates to a tensile material removing device for a ground anchor, which can more easily remove the tensile material from the perforation hole by pulling the tensile material inserted in the perforation hole without hitting it.

Generally, the anchor is used for prevention of disintegration of the incision surface at the incision site, stabilization of the slope, prevention of injury by groundwater of a large structure such as a building or a dam, prevention of collapse of the excavation wall during underground construction work of a large building, And to prevent movement or distortion of the structure when constructing a large steel tower.

In such an anchor construction, the anchor components are classified into a fixation unit that exerts a required stress, a free portion that transfers stress exerted in the fixation field, and a fixture that allows the required stress to act on the structure.

Among these components, the fixing part is determined by the adhesion resistance between the ground and the grout, the grout and the tensile material.

The free portion used in the anchor method may be made of a tensile material, for example, a wire rope coated with a plurality of twisted steel wires.

Generally, an anchor is to be installed to correspond to the earth pressure of the back soil or to increase the shear strength of the ground sheet itself for the slope over the angle of elevation in construction work or civil engineering work such as terra firma construction.

The anchor is divided into a permanent anchor and a removal anchor depending on the purpose.

The removal anchor is used for construction purposes and is removed from the ground after achieving its objective. If it is used for construction, leaving anchors buried in the ground will cause environmental pollution problems and waste of materials. In addition, There is a need to eliminate the disadvantages of the dispute due to the invasion of the adjacent land and the action of the anchor on the ground in the underground construction.

Therefore, studies on removal anchors and the like have been actively conducted.

Removal anchors have been filed in many ways, such as an anchor removal method using a screw, an anchor removal method using a gunpowder, and an anchor removal method with a removal tensile material inserted according to a removal method.

However, in such a conventional art, there is a problem that a large rotational force is required to be applied to the anchor and the anchor is bent due to the back soil act, which makes it difficult to rotate the anchor. It is difficult to expect a certainty of the construction. In the method of removing anchor by removing tensile material, it is necessary to insert a tensile material for removal in addition to the necessary tensile material. Therefore, There is a problem in that the size of the semiconductor device becomes large and its structure becomes complicated.

In order to solve these problems, many wedge-shaped removal anchors have recently been proposed.

A typical conventional wedge-type removal anchor includes a wedge assembly or wedge unit. The wedge assembly includes a tension member inserted into the fixing hole. When the wedge assembly is to be removed, the tension member inserted into the hole is vertically hammered, Is released from the fixing port including the wedge unit.

However, in most apparatuses and methods for removing tensile material at present, the tensile material is struck from the outside in the direction of the fixation port to release the fixation port. When the tensile material is hit, hardened cement or the like is bonded to the surface of the tensile material, The external force hitting the tensile material is not transmitted to the fixture, so that the releasing of the fixture is not performed smoothly, so that it is difficult to remove the tensile material.

Korean Patent No. 10-1241403 Korea Public Utility Model No. 20-2009-0007218

It is an object of the present invention to provide a tensile material removing device for a ground anchor which can easily remove a tensile material by pulling a tensile material inserted in a perforation hole without hitting it.

In order to attain the above object, according to one aspect of the present invention, there is provided an apparatus for removing tensile material for a ground anchor, comprising: a tensile material having one end inserted into a perforation hole formed on a surface of the ground and coupled to a wedge- A tension anchor device for a ground anchor, comprising: a main body disposed outside the perforation hole and having an insertion hole formed at one end thereof for receiving the other end of the tensile material; A piston mounted on the body so as to be lifted and lowered and having both ends thereof opened to communicate with the insertion hole; And a gripping member mounted on the piston and holding the tensile material to be inserted into the mounting hole, wherein the tensile material is composed of a plurality of steel wires coupled to each other, and the gripping member is made of any one of steel wires constituting the tensile material Wherein the steel wire held by the holding member at the time of lifting the piston is pulled out from the remaining steel wires not gripped by the holding member.

Wherein the tensile material is composed of a center steel wire arranged in a straight line and a plurality of twisted steel wires joined to and bonded to the outer circumferential edge of the center steel wire so as to prevent the upward movement of the twisted steel wire And the gripping member grips the center steel wire so that the center steel wire is pulled out from the twisted steel wire when the piston rises.

Wherein the insertion hole comprises: a first insertion hole into which the tensile material made of the center steel wire and the twisted steel wire is inserted; A diameter of the second insertion hole is equal to or larger than a diameter of the center steel wire and smaller than an entire diameter of the tensile material, And the engagement step is formed by a step of a diameter between the first insertion hole and the second insertion hole.

The main body includes: a support having the through-hole formed therein through which the piston can be lifted and lowered; Wherein the holding jig is detachably coupled to the support body, the holding jig being detachably coupled to the support body, wherein the holding jig is inserted into the de-installation hole The first insertion hole communicates with the through hole through the second insertion hole, and the diameter of the through hole is equal to or larger than the diameter of the tensile member.

Wherein the gripping member comprises a cone shaped wedge unit composed of a plurality of wedges and inserted into the mounting hole and holding the tensile material to be inserted into the mounting hole, And an inclined portion in which the outer peripheral surface of the wedge unit is in contact is formed.

Wherein the wedge unit is composed of a first wedge unit and a second wedge unit having the same outer diameter and different diameters, and are detachably mounted on the mounting hole, the first wedge unit grips a part of the tensile material, The second wedge unit grips the entire tensile material.

The gripping member includes: a first spring having one end inserted with the mounting hole and pressing the wedge unit to the inclined portion; And a bolt member coupled to the mounting hole and contacting the other end of the first spring, wherein the bolt member is formed with a discharge hole through which the tensile material passes.

Alternatively, the gripping member may include: a hollow housing coupled to one end of the piston facing the insertion hole; And a pair of rollers mounted inside the housing, wherein the tensile material is inserted into the mounting hole through a pair of the rollers while passing through the housing, and a pair of the rollers are inserted between the pair of rollers .

The housing has a pair of inclined holes formed therein. The roller is slidably mounted along the slot. The slots are formed to be spaced apart from each other in a direction away from the insertion hole. The roller moves along the slot.

The gripping member further includes a second spring for moving the roller in the insertion hole direction.

In order to achieve the above object, the present invention provides a method for removing tensile material for a ground anchor, comprising the steps of: inserting a tensile material having one end inserted into a perforation hole formed on the ground surface and coupled to a wedge- A method for removing a tensile material for a ground anchor to be removed from a hole, the method comprising: a removal step of removing a part of a plurality of wires constituting the tensile material at the other end of the tensile material; A first grasping step of grasping an unremoved steel wire; A first drawing step of pulling only the gripped wire held from the remaining untreated steel wires in a state in which the untreated wire is fixed, thereby releasing the anchor point coupled to one end of the tensile material; A second holding step of gripping the entire tensile material; And a second drawing step of pulling the entire tensile material gripped.

Wherein the tensile material is composed of a center steel wire arranged in a straight line and a plurality of twisted steel wires joined to and bonded to the outer circumferential edge of the center steel wire while removing the twisted steel wire at the other end of the tensile material in the removing step, In the first gripping step, the center steel wire is gripped, and in the first drawing step, the center steel wire is pulled out from the twisted steel wire to release the fastening hole coupled to one end of the tensile material.

The above-described tensile material removing apparatus for ground anchor according to the present invention has the following effects.

The gripping member grips at least one of the steel wires constituting the tensile member and the steel wire held by the gripping member at the time of lifting of the piston is pulled out from the remaining steel wires not gripped by the gripping member to pull out the tensile material The wedge-type fastening port coupled to the tensile material can be easily released to easily remove the tensile material from the perforation hole.

In particular, by pulling out the center steel wire among the steel wires constituting the tensile material, the wedge-shaped fixing hole joined to one end of the tensile material can be more easily released and the tensile material can be removed easily and quickly from the hole.

1 is a sectional structural view of a tensile material removing device for a ground anchor according to a first embodiment of the present invention;
FIG. 2 is a perspective view showing a state where a tensile material according to a first embodiment of the present invention is inserted into a perforation hole,
3 is a cross-sectional structural view of a tensile material removing device for a ground anchor according to the first embodiment of the present invention,
Fig. 4 is a cross-sectional structural view of the piston in the state in which the piston is lifted and lowered in Fig. 3,
5 is a view illustrating a process of pulling a tensile material from a perforation hole by using a tensile material removing device for a ground anchor according to a first embodiment of the present invention.
6 is a sectional structural view of a tensile material removing device for ground anchor according to a second embodiment of the present invention,
7 is a perspective view of a gripping member according to a second embodiment of the present invention,
8 is a sectional structural view of a tensile material removing apparatus for a ground anchor according to a second embodiment of the present invention,
Fig. 9 is a sectional structural view of the state in which the piston rises and falls in Fig. 8,
10 is a view showing a process of pulling a tensile material from a perforation hole by using a tensile material removing device for a ground anchor according to a second embodiment of the present invention,

First Embodiment

FIG. 1 is a cross-sectional structural view of a tensile material removing device for a ground anchor according to a first embodiment of the present invention, FIG. 2 is a sectional structural view of a tensile material removing device for a ground anchor according to the first embodiment of the present invention, 3 is a cross-sectional view of a state where a tensile material removing device for a ground anchor according to the first embodiment of the present invention is installed on a tensile material, FIG. 4 is a cross- Is a process diagram of pulling the tensile material from the perforation hole by using the apparatus for removing tensile material for ground anchor according to the first embodiment of the present invention.

1 to 5, one end of the tensile material removing device of the present invention is inserted into a perforation hole 60 formed in the ground surface and is coupled to a wedge-shaped fixing port 50, To a device for removing a tensile material (40) protruding from the hole (60) from the perforation hole (60).

That is, the tension member 40, which is coupled to the fixation port 50 and inserted in the perforation hole 60, is removed from the perforation hole 60 through the release of the fixation port 50.

The fixing port 50 may be made of a wedge-type fixing member as shown in Korean Patent No. 10-1241403, Korean Utility Model Application 20-2009-0007218, etc., and a detailed description thereof will be omitted.

1, the apparatus for removing tensile material for a ground anchor according to the present invention includes a main body 10, a piston 20, a gripping member 30, and the like.

The main body 10 is disposed outside the perforation hole 60 formed in the ground and has an insertion hole 16 through which the other end of the tensile material 40 is inserted.

The piston 20 is mounted on the main body 10 so as to be lifted and lowered, and a mounting hole 21 having both ends opened is formed therein.

The piston 20 is raised or lowered by hydraulic pressure or the like.

The mounting hole 21 communicates with the insertion hole 16 formed in the main body 10.

The gripping member 30 is mounted on the piston 20 and grips the tensile material 40 to be inserted into the mounting hole 21.

In the present embodiment, the gripping member 30 is composed of cone-shaped wedge units 31 and 32. The wedge units 31 and 32 are composed of a plurality of wedges and are inserted into the mounting hole 21 .

The wedge units 31 and 32 grip the outer circumferential surface of the tensile material 40 inserted into the mounting hole 21.

The mounting hole 21 is formed with a shape corresponding to the outer shape of the wedge units 31 and 32 and formed with an inclined portion 22 in contact with the outer peripheral surface of the wedge units 31 and 32.

Therefore, when the piston 20 is raised in a state where the wedge units 31 and 32 are inserted into the mounting hole 21, the inclined portion 22 and the wedge units 31 and 32 come into contact with each other, The inclined portion 22 and the wedge units 31 and 32 are slightly spaced from each other when the piston 20 is lowered so that the wedge unit 31 and 32 release the gripping state of the tensile material 40 disposed therein.

The tensile material 40 is formed by bonding a plurality of steel wires together.

More specifically, the tensile material 40 is composed of a center steel wire 41 arranged in a straight line, and a plurality of twisted steel wires 42 interlaced and bonded to the outer circumferential edge of the center steel wire 41.

In general, the center steel wire 41 is composed of one wire and the twisted wire 42 is composed of six wires.

The gripping members 30 or the wedge units 31 and 32 grip any one or more of the steel wires constituting the tensile material 40 and the wedge units 31 and 32 are fixed when the piston 20 is lifted. Is pulled out from the remaining steel wires not gripped by the wedge units (31, 32) to be drawn out.

That is, the wedge units 31 and 32 grip the center steel wire 41 or the twist wire 42 constituting the tensile material 40 and pull out the steel wire 20 from the remaining steel wires when the piston 20 is lifted .

The wedge units 31 and 32 may be pulled and held by either the center steel wire 41 or the twisted steel wire 42. It is preferable that the wedge units 31 and 32 are formed by gripping the center steel wire 41, .

The center steel wire 41 is gripped and pulled so that the center steel wire 41 is connected to the twisted steel wire 42 even if the twisted wire 42 surrounding the center steel wire 41 is strongly fixed by cement or the like, It is possible to easily separate and withdraw from.

The insertion hole 16 formed in the main body 10 is formed with a latching jaw 19 for preventing the upward movement of the twisted wire 42 when the piston 20 rises.

When the wedge units 31 and 32 grasp the center steel wire 41 and the piston 20 is lifted by the stopping jaws 19, the twisted steel wire 42 is pulled up by the engagement jaws 19, So that the center steel wire 41 is pulled out of the tensile material 40 and pulled out.

More specifically, the insertion hole 16 comprises a first insertion hole 17 and a second insertion hole 18.

The tensile material 40 including the center steel wire 41 and the twisted steel wire 42 is inserted into the first insertion hole 17.

The second insertion hole 18 is located above the first insertion hole 17, and the center steel wire 41 is inserted.

The diameter of the second insertion hole 18 is equal to or larger than the diameter of the center steel wire 41 and smaller than the entire diameter of the tensile material 40.

Therefore, by the step difference in diameter between the first insertion hole 17 and the second insertion hole 18, it is possible to prevent the engagement jaws 17 and 18 from coming into contact with the first insertion hole 17 and the second insertion hole 18, 19 are formed.

The body 10 having the insertion hole 16 formed therein may be integrally formed or may be separated into the support body 11 and the engagement jig 15 as in the present embodiment.

The supporting body 11 is provided with a through hole 13 through which the piston 20 can be lifted and lowered and a deaeration hole 12 is formed in a lower portion thereof.

The latching jig 15 is detachably coupled to the deaeration hole 12 of the support body 11 and has the insertion hole 16 and the latching jaw 19 formed therein.

The first insertion hole 17 is communicated with the through hole 13 through the second insertion hole 18 in a state where the engagement jig 15 is inserted into the deformation hole 12, (13) is equal to or greater than the diameter of the tensile material (40).

The tensile material 40 is inserted into the mounting hole 21 through the deaerating hole 12 and the through hole 13 while the jig 15 is removed, The tensile material 40 is inserted into the mounting hole 21 through the insertion hole 16 and the through hole 13.

The entire length of the tensile material 40 may be inserted into the deinking hole 12 and the through hole 13 in a state where the jig 15 is removed. The tension member 40 may be entirely inserted into the first insertion hole 17 and the center steel wire 41 may be inserted into the second insertion hole 18 by the engagement step 19.

The wedge units 31 and 32 are composed of a first wedge unit 31 and a second wedge unit 32 having the same outer diameter and different diameters and are detachably mounted on the mounting holes 21 do.

The first wedge unit 31 has a small inner diameter so as to grip only a part of the tensile material 40 such as the center steel wire 41 and the second wedge unit 32 grips the entire tensile material 40 The inner diameter is formed to be large.

The gripping member 30 may further include a first spring 33 and a bolt member 34 in addition to the wedge units 31 and 32.

The first spring 33 has a function of inserting the mounting hole 21 and pressing one end of the wedge unit 31 and 32 against the inclined portion 22.

The bolt member 34 contacts the other end of the first spring 33 and is coupled to the other end of the mounting hole 21 to prevent the first spring 33 from being detached from the mounting hole 21 .

The bolt member 34 is formed with an exhaust hole 35 through which the tensile material 40 inserted into the mounting hole 21 is discharged.

Hereinafter, a method of removing the tensile material for a ground anchor according to the present invention having the above-described structure will be described.

The method for removing a tensile material for a ground anchor according to the present invention comprises a removing step, a first holding step, a first drawing step, a second holding step, and a second drawing step.

The removal step removes a portion of the plurality of strands constituting the tensile material 40 from the other end of the tensile material 40.

Specifically, as shown in FIG. 2 (a), a pulling device (not shown) coupled to the other end of the tensile material 40 is removed from the outside of the perforation hole 60.

Then, as shown in FIG. 2 (b), the twisted wire 42 disposed at the periphery of the tensile material 40 except for the center steel wire 41 is removed.

If the twisted wire 42 is to be gripped and pulled other than the center steel wire 41, the remaining twisted steel wire 42, which includes the center steel wire 41, Remove all.

At this time, the tensile material 40 is disposed in the pipe 65 inserted in the perforation hole 60.

The first holding step is a step of grasping the unremoved steel wire with the gripping member (30).

More specifically, as shown in FIG. 3, the engaging jig 15 is mounted on the de-installation hole 12, and the first wedge unit 31 is mounted on the mounting hole 21.

In this state, when the tensile material 40 is inserted into the main body 10 through the insertion hole 16, the tensile material 40 including the twisted wire 42 is pulled by the engaging jaws 19 Wherein the center wire is inserted into the first insertion hole and the center wire penetrates through the second insertion hole and the through hole so that the first wedge is inserted into the mounting hole, Is inserted into the inside of the unit (31).

At this time, the first wedge unit 31 strongly grips the outer circumferential surface of the center steel wire 41 disposed inside the first wedge unit 31 by the elastic force of the first spring 33.

In the first holding step, a pedestal 55 is disposed on the lower portion of the main body 10 so that the first wedge unit 31 is stably supported to grasp the center steel wire 41.

The first drawing step is a step of pulling only the gripped wire held from the remaining untreated steel wires in the state where the untreated steel wires are fixed and releasing the fixing stopper 50 coupled to one end of the tensile material 40. [

More specifically, as shown in FIG. 4 (a), as the piston 20 moves upward, the inclined portion 22 formed on the mounting hole 21 presses the first wedge unit 31 So that the first wedge unit 31 tries to rise while grasping and holding the center steel wire 41 disposed therein more strongly.

On the other hand, the twisted steel wire 42 surrounding the center steel wire 41 is caught by the stopping hook 19 and can not rise.

Therefore, the twisted wire strands 42 not gripped by the first wedge unit 31 are fixed by the engaging jaws 19, and the center stranded wire gripped by the first wedge unit 31, 41 are pulled up from the twisted steel wires 42 to rise.

Then, the center steel wire 41 is also lifted at one end of the tensile material 40, so that the wedge type fastening opening 50, which grips one end of the tensile material 40, is loosened.

Since the tensile material 40 is pulled without hitting the tensile material 40 in the present invention, the tensile material 40 is kept in a taut state without warping, and tensile force pulling the other end of the center steel wire 41 is transmitted to the center steel wire 41 So that the wedge type fastening opening 50 coupled to one end of the tensile material 40 can be easily and accurately released.

When the piston 20 is lifted by a predetermined length, the piston 20 descends as shown in FIG. 4 (b).

At this time, since the inclined portion 22 does not press the first wedge unit 31, the inside of the first wedge unit 31 is loosened. As a result, when the first wedge unit 31 is lowered The center steel wire 41 is released from the first wedge unit 31 and remains in a raised state without falling down despite the downward movement of the first wedge unit 31. [

When the center steel wire 41 is raised by the first drawing step and the fixing hole 50 is released, the second holding step is performed.

The second holding step is a step of gripping the whole of the tensile material 40.

At this time, as shown in FIG. 5 (a), the engaging jig 15 is removed from the deaerating hole 12, and the tensile material 40 is inserted into the deaerating hole 12 and the through hole 13 do.

If the fastening jig 15 and the supporting member 11 are integrally formed, the new jig 15 is replaced with a new main body 10 having a hole with a diameter through which the tensile material 40 can be inserted.

However, as in the present embodiment, it is preferable to replace only the engagement jig 15 so that the tensile material 40 can be disposed on the de-installation hole 12. [

Then, the first wedge unit 31 having a small inner diameter is removed from the mounting hole 21, and the second wedge unit 32 having a large inner diameter is mounted.

The tensile material 40 is inserted into the deinking hole 12, the through hole 13 and the mounting hole 21 and inserted into the second wedge unit 32.

In the second grasping step, the pedestal 55 is removed and the main body 10 is arranged in the direction of the perforation hole 60 rather than the first grasping step, So that the second wedge unit 32 can grip the entirety of the tensile material 40.

After the second wedge unit 32 grips the tensile material 40, the second take-out step is performed.

The second drawing step is a step of pulling out the entire tensile material 40 held by the second wedge unit 32 by the second holding step and removing it from the perforation hole 60.

5 (b), when the piston 20 is lifted, the tensile material 40 is lifted from the perforation hole 60 while being released from the wedge-shaped fixing port 50, The entire tensile material 40 inserted in the perforation hole 60 is removed while the piston 20 is repeatedly moved up and down.

At this time, the other end of the tensile material 40 is lifted from the wedge-shaped fixing hole 50 because the center steel wire 41 rises and the interior is empty. In this state, As shown in FIG. 5 (b), as the piston 20 moves upward, the other end of the tensile material 40 is easily released from the wedge-shaped fixing port 50 and separated and separated.

Since the second wedge unit 32 is not pressed while being separated from the inclined portion 22 when the piston 20 is lowered, the second wedge unit 32 is not pressed by the piston 20, The tensile material 40 is released from the second wedge unit 32 and does not descend while being put in a raised state.

By the above-described apparatus and method of the present invention, the tensile material 40 inserted in the perforation hole 60 can be more easily removed.

Second Embodiment

7 is a perspective view of a gripping member according to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view of a second embodiment of the present invention, Fig. 9 is a cross-sectional view of a state in which the piston is lifted and lowered in Fig. 8, and Fig. 10 is a cross-sectional view showing a state in which the piston is lifted and lowered in the tension member according to the second embodiment of the present invention And pulling the tensile material from the perforation hole by using a tensile material removing device for ground anchor according to the present invention.

The second embodiment differs from the first embodiment in the gripping members 30, which will be mainly described.

The gripping member 30 includes a housing 36 and a roller 38.

The housing (36) is hollow and has a hollow shape and is coupled to one end of the piston (20) facing the insertion hole (16).

The rollers 38 are paired and are rotatably mounted inside the housing 36.

The tensile material 40 is inserted into the mounting hole 21 through a pair of rollers 38 while passing through the housing 36.

The pair of rollers 38 causes the interval between the pistons 20 to be further widened when the pistons 20 are lowered.

To this end, the housing 36 is formed with a pair of slanting slots 37 in this embodiment.

The roller 38 is slidably mounted along the elongated hole 37.

At this time, the elongated holes 37 are formed to be inclined so as to be spaced apart from each other in a direction away from the insertion hole 16.

Therefore, when the piston 20 is lifted or lowered, the roller 38 moves along the slot 37 to change the interval between the pair of rollers 38. [

Therefore, when the piston 20 is lifted, the interval between the pair of rollers 38 becomes minimum, and the tension member 40 disposed therebetween is strongly held, and the piston 20 is lowered The gripping of the tensile material 40 in which the interval between the pair of the rollers 38 is maximized is interrupted.

The gripping member 30 may further include a second spring 39 for moving the roller 38 in the direction of the insertion hole 16.

With the second spring 39, the pair of rollers 38 can always be disposed adjacent to each other and can be brought into close contact with the outer peripheral surface of the tensile material 40 disposed therebetween, .

Other configurations are the same as those of the first embodiment, and a detailed description thereof will be omitted.

Hereinafter, a method of removing the tensile material for a ground anchor according to the present invention having the above-described structure will be described.

The method for removing a tensile material for a ground anchor according to the present invention comprises a removing step, a first holding step, a first drawing step, a second holding step, and a second drawing step.

The removal step is the same as that of the first embodiment, and a detailed description thereof will be omitted.

The first holding step is a step of grasping the unremoved steel wire with the gripping member (30).

More specifically, as shown in FIG. 8, the engaging jig 15 is attached to the deaeration hole 12.

In this state, when the tensile material 40 is inserted into the main body 10 through the insertion hole 16, the tensile material 40 including the twisted wire 42 is pulled by the engaging jaws 19 The center steel wire 41 is inserted into the first insertion hole 17 and passes through the second insertion hole 18 and the through hole 13 and then is inserted through the pair of rollers 38 And inserted into the hole 21.

At this time, the pair of rollers 38 strongly grip the outer circumferential surface of the center steel wire 41 by the elastic force of the second spring 39.

The first drawing step is a step of pulling only the gripped wire held from the remaining untreated steel wires in the state where the untreated steel wires are fixed and releasing the fixing stopper 50 coupled to one end of the tensile material 40. [

More specifically, as shown in FIG. 9 (a), as the piston 20 ascends, the pair of rollers 38 move toward the side along the slot 37, I try to climb strongly while gripping.

On the other hand, the twisted steel wire 42 surrounding the center steel wire 41 is caught by the stopping hook 19 and can not rise.

The untreated twisted strands 42 are held by the clamping jaws 19 so that the center strand 41 gripped by the rollers 38 is pulled from the twisted strands 42 .

Then, the center steel wire 41 is also lifted at one end of the tensile material 40, so that the wedge type fastening opening 50, which grips one end of the tensile material 40, is loosened.

Since the tensile material 40 is pulled without hitting the tensile material 40 in the present invention, the tensile material 40 is kept in a taut state without warping, and tensile force pulling the other end of the center steel wire 41 is transmitted to the center steel wire 41 So that the wedge type fastening opening 50 coupled to one end of the tensile material 40 can be easily and accurately released.

When the piston 20 is lifted by a predetermined length, the piston 20 descends as shown in FIG. 9 (b).

At this time, since the roller 38 is in contact with the outer circumferential surface of the center steel wire 41 but can move with respect to each other along the elongated hole 37 formed in an inclined manner, the center steel wire 41, when the piston 20 descends, Is released from the roller (38) and remains in a raised state without falling down despite the falling of the roller (38).

When the center steel wire 41 is raised by the first drawing step and the fixing hole 50 is released, the second holding step is performed.

The second holding step is a step of gripping the whole of the tensile material 40.

10 (a), the engaging jig 15 is removed from the deaerating hole 12 and the tensile material 40 is inserted into the deaerating hole 12 and the through hole 13 do.

The tensile material 40 is disposed between the pair of rollers 38 after passing through the deaerating hole 12 and the through hole 13.

In the second grasping step, the pedestal 55 is removed and the main body 10 is arranged in the direction of the perforation hole 60 rather than the first grasping step, So that the roller 38 can grip the entirety of the tensile material 40.

After the pair of rollers 38 hold the entirety of the tensile material 40, the second take-out step is performed.

The second pulling-out step pulls the entire tensile material 40 held by the pair of rollers 38 in the second holding step as shown in FIG. 10 (b) .

At this time, the other end of the tensile material 40 is lifted from the wedge-shaped fixing hole 50 because the center steel wire 41 rises and the interior is empty. In this state, 10 (b), the other end of the tensile material 40 is easily released from the wedge-shaped fixing port 50 and separated and released as the piston 20 is raised.

By the above-described apparatus and method of the present invention, the tensile material 40 inserted in the perforation hole 60 can be more easily removed.

Other configurations are the same as those of the first embodiment, and a detailed description thereof will be omitted.

The tensile material removing device for ground anchor according to the present invention is not limited to the above-described embodiments, but can be variously modified and embraced within the scope of the technical idea of the present invention.

The present invention relates to a jig and a method for manufacturing the same and a method of manufacturing the same.
20: piston, 21: mounting hole, 22: inclined portion,
The present invention relates to a wedge member having a first wedge unit, a second wedge unit, a first spring,
36: housing, 37: elongated hole, 38: roller, 39: second spring,
40: tensile material, 41: center steel wire, 42:
50: anchor, 55: pedestal,
60: perforation hole, 65: pipe,

Claims (12)

delete delete delete A pulling material removing device for a ground anchor, the pulling material being inserted into a perforation hole formed on a surface of the ground and being coupled to a wedge-shaped fixing port and having a second end protruding to the outside of the perforation hole from the perforation hole,
A main body having an insertion hole for receiving the other end of the tensile material;
A piston mounted on the body so as to be lifted and lowered and having both ends thereof opened to communicate with the insertion hole;
And a grip member mounted on the piston and gripping the tensile material inserted into the mounting hole,
The tensile material,
A center steel wire arranged in a straight line and a plurality of twisted steel wires joined to each other at an outer periphery of the center steel wire are mutually coupled,
Wherein the insertion hole is formed with a latching jaw that prevents the upward movement of the twisted wire when the piston rises,
Wherein the gripping member grips the center steel wire, pulls the center steel wire from the twisted steel wire when the piston rises,
The insertion hole
A first insertion hole into which the tensile material made of the center steel wire and the twisted steel wire is inserted; And a second insertion hole which is located above the first insertion hole and into which the center steel wire is inserted,
Wherein a diameter of the second insertion hole is equal to or greater than a diameter of the center steel wire and is smaller than an entire diameter of the tensile material so that the engagement step is formed by a step of a diameter between the first insertion hole and the second insertion hole,
The main body includes:
A supporting body on which the piston is mounted so as to be able to move up and through holes through which the tensile material passes; And a locking jig detachably coupled to the support and having the insertion hole and the locking jaw formed therein,
Wherein the support body is formed with a detachable hole to which the engagement jig is detachably coupled,
Wherein the first insertion hole communicates with the through hole through the second insertion hole in a state where the engagement jig is inserted into the de-
And the diameter of the through hole is equal to or larger than the diameter of the tensile material. The method of claim 4,
Wherein the gripping member comprises:
And a cone shaped wedge unit composed of a plurality of wedges and inserted into the mounting hole and holding the tensile material inserted into the mounting hole,
Wherein the mounting hole is formed with a shape corresponding to the outer shape of the wedge unit and formed with an inclined portion in contact with the outer circumferential surface of the wedge unit. The method of claim 5,
Wherein the wedge unit is composed of a first wedge unit and a second wedge unit having the same outer diameter and different diameters and are detachably mounted on the mounting hole,
The first wedge unit grips a portion of the tensile material,
And the second wedge unit grips the entire tensile material. The method of claim 5,
Wherein the gripping member comprises:
A first spring inserted into the mounting hole and having one end pressurizing the wedge unit with the inclined portion;
And a bolt member coupled to the mounting hole and contacting the other end of the first spring,
Wherein the bolt member is formed with a discharge hole through which the tensile material passes. A pulling material removing device for a ground anchor, the pulling material being inserted into a perforation hole formed on a surface of the ground and being coupled to a wedge-shaped fixing port and having a second end protruding to the outside of the perforation hole from the perforation hole,
A main body having an insertion hole for receiving the other end of the tensile material;
A piston mounted on the body so as to be lifted and lowered and having both ends thereof opened to communicate with the insertion hole;
And a grip member mounted on the piston and gripping the tensile material inserted into the mounting hole,
The tensile material is composed of a plurality of steel wires coupled to each other,
Wherein the gripping member grips any one or more of the steel wires constituting the tensile member and the steel wire held by the gripping member when the piston is lifted is pulled out from the remaining steel wires not gripped by the gripping member,
Wherein the gripping member comprises:
A hollow housing coupled to one end of the piston facing the insertion hole;
And a pair of rollers mounted inside the housing,
The tensile material is inserted into the mounting hole through a pair of the rollers while passing through the housing,
Wherein a distance between the pair of rollers when the piston is lowered is further widened. The method of claim 8,
The housing has a pair of inclined holes formed therein,
The roller is slidably mounted along the slot,
Wherein the slots are spaced apart from each other in a direction away from the insertion hole,
Wherein the roller moves along the slot when the piston is moved up and down. The method of claim 9,
Wherein the gripping member comprises:
And a second spring for moving the roller in the direction of the insertion hole. delete delete
KR1020150138447A 2015-10-01 2015-10-01 Removal apparatus of tension material for ground anchor KR101765536B1 (en)

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CN111851484B (en) * 2020-07-30 2022-03-15 深圳市工勘岩土集团有限公司 Method for cutting off semi-invasive prestressed anchor cable in supporting pile by rotary drilling rig
KR102393409B1 (en) * 2021-05-06 2022-05-03 김정열 Tension member disposal equipment

Citations (1)

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Publication number Priority date Publication date Assignee Title
KR101255746B1 (en) * 2011-01-07 2013-04-17 김용만 Apparatus for removing Steel Strand

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KR20090007218U (en) 2008-01-14 2009-07-17 김정한 Removal ground anchor
KR101241403B1 (en) 2012-05-02 2013-03-11 주식회사 대성방재기술 Removal anchor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101255746B1 (en) * 2011-01-07 2013-04-17 김용만 Apparatus for removing Steel Strand

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