KR20020014647A - apparatus and method for removal anchor using double anchor head - Google Patents

Abstract

PURPOSE: A removal anchoring method is provided to remove an anchor body without a disturbance by little strength in a narrow space. CONSTITUTION: A removal anchoring method using a double anchor head to use for a layer difficult to place a perforated hole(1) comprises the steps of installing a packaged spacer(41) having a rugged section on a boundary between an anchorage tenon and a free tenon without using a wrinkle pipe, fixing a packer to the packaged spacer(41) using a band such as a steel wire, etc., installing a packer injecting hose to the packaged spacer(41) additionally, sealing up the perforated hole(1) by expanding the packer by grouting primarily to the whole area of an anchor body using a perforated hole injecting hose, grouting secondarily using a packer injecting hose, and grouting thirdly to the ground below the packer using the perforated hole injecting hose to form a bulb of an anchorage zone by pressure grouting.

Description

Apparatus and method for removal anchor using double anchor head}

The removal anchoring method according to the prior art inserts a PC steel wire together with grease in a resin hose, attaches a load bearing body to the tip of an unboned PC steel wire bent in a U shape, inserts it into the ground, and tensions and fixes both ends of the steel wire. After removing the anchoring device of the anchor head to remove the tensile force, there is a method of removing the steel wire by pulling one end of the U-shaped steel wire. However, in the U-TURN anchor method, even when the steel wire is pulled to remove the anchor body after construction, the anchor body is often not pulled out and requires a considerable time, and the wire cannot be reused.

According to another conventional removal anchor method, an anchor is formed in the ground with an explosive installed in the anchorage, and when the anchor is removed, the explosive is exploded and the cement of the anchorage is crushed, thereby The friction force is reduced and the anchor is pulled out by force. In this case, the drawing may not be possible depending on the state of crushing, and when there is an adjacent building and the upper structure due to vibration and ground relaxation when drawing the anchor, there is a harmful effect. This is generated and disadvantageous in terms of environment.

It is an object of the present invention to provide a removable anchoring method and apparatus that can solve the disadvantages of the prior art as described above.

That is, in the present invention, the anchor heads and the heads are respectively provided with anchor heads, the unbonded steel wires are tensioned to form an anchor body, and the wires for removing the anchor body are pushed in the opposite direction of tension, and the steel wire wedges are separated from the steel wires. It is an object of the present invention to provide a method and a device capable of removing the anchorage in the ground without disturbing even in a small space and small force by pulling and removing the steel wire in a separated state.

In another aspect, the present invention is to extend the steel wire in the unboned state to introduce a compressive stress by the injection material over the full length of the anchor anchoring so that the crack does not occur in the section where the frictional force is formed.

It is another object of the present invention to provide a device that can easily remove the steel bar or reinforcing bars used in the nailing method.

In addition, the present invention has another object that can be used as a temporary anchor as well as a temporary anchor.

In addition, the present invention by drawing the steel wire and reuse, there is no environmental pollution according to the waste material treatment of other removable anchoring method.

1 is an example of a removal anchor using a double anchor head.

2 is another example of a removal anchor using a double anchor head.

3 is another example of a removal anchor using a double anchor head.

4 is another example of a removal anchor using a double anchor head.

5 is another example of a removal anchor using a double anchor head.

6 is a detailed cross-sectional view of the tip anchor head.

7 is a combined front view of the steel wire and the tip anchor head.

8 is a perspective view of the combination of the steel wire and the tip anchor head.

9 is a wire removal chart.

10 is a detailed cross-sectional view of the wedge removal spring.

11 is a detailed cross-sectional view of the tip anchor head when using a steel bar or rebar;

12 is another example of a detailed sectional view of a double anchor head.

13 is another example of a wire removal flow chart.

14 is a sectional view and a front view of a steel wire spacer.

15 is a detailed cross-sectional view of the wedge for removal anchored steel wire with spring.

Fig. 16 is a detailed cross sectional view and front view of a steel wire wedge for a removal anchor having a double cross section.

17 is a detailed cross-sectional view and front view of the wedge wire for removal anchor.

18 is a perspective view of a steel wire fixing ring.

<Short description of the symbols in the drawings>

1: drilling hole 2: steel wire

3: steel wire coating 4: injection hose

4'; Outer injection hose 5: elastic spacer

6: steel bar or rebar 7: rebar cladding

8: uneven portion 10: tip anchor head

10 ': Tip anchor head face 11: Tapered hole

12: Wedge removing spring 13: Round rubber packaging

14: Steel anchor wedge for removal anchors 14 ': Steel anchor wedge with removal cross sections

15: Tip anchor head cover 16: Adjustment groove

17: spring adjustment part 18: ring spring

18 ': elastic band 30: corrugated tube

40: packer 41: packaged spacer

42: steel wire spacer 43: reinforcing steel wire

44: waterproof rubber pad 45: steel wire covering hole

46: Packer injection hose hole 46 ': Packer injection hose

47: drill hole injection hose 47 ': drill hole injection hose

50: uneven section 60: screw portion

70: spring-loaded steel anchor wedge 71: round ring

72: steel wire wedge 73: connection portion

74: fixing pin 75: spring

76: uneven surface 77: edge section

78: chamfer 80: existing anchor wedge

90: steel wire fixing ring 91: tightening bolt

The present invention for achieving the above object is a high-density polyethylene steel wire coating material for making the steel wire Unboned state, a greased steel wire inserted into the wire coating material, the interval for maintaining a constant interval of the steel wire coated by the coating material Ash, which consists of a tip anchor head and a removal anchor wedge made to fix and loosen the tip of the wire, in particular, the steel wire wedge according to the present invention, even when tensioned once with the wedge of a general anchor, removes tension By this, the separation of the anchor head and the wedge is not impossible, it is characterized in that it is easily removable.

Hereinafter, a preferred example of the present invention will be described with reference to the accompanying drawings.

1 is an example of a removal anchor using a double anchor head, a case in which the corrugated pipe 30 is installed throughout the anchor body to increase the main surface friction force and to prevent soil or foreign matter from penetrating.

Figure 2 is another example of the removal anchor using a double anchor head, when the corrugated pipe 30 is partially installed, one side of the corrugated pipe 30 is fixed to the tip anchor head 10 and the other is a packer ( 40) to prevent the infiltration of soil and foreign matter.

Figure 3 is another example of the removal anchor using a double anchor head, in the case of using a steel rod or reinforcing bar 6 instead of the steel wire (2) in the lower portion of the reinforcing bar (7) is formed with a screw portion (60) It is possible to connect with the screw portion of the tip anchor head 10, and the concave-convex portion 8 is formed on the outer circumferential surface of the covering material 7 to increase the friction force.

4 is another example of the removal anchor using the double anchor head, and is used for the strata where the self-support of the drilling hole 1 is maintained to some extent, without using the corrugated pipe 30, the compressive force of the tip of the anchor body It is characterized by using a reinforcing wire 43 immediately after the double anchor head to increase the.

FIG. 5 shows another example of the removal anchor using the double anchor head, which is a method for use in strata where the self-supporting hole 1 is difficult to stand on, and is located at a point where the fixing and free tenons are bound without using the corrugated pipe 30. A packaged spacer 41 having an uneven section 50 is provided, and the packer 40 is fixed to the packaged spacer 41 by using a band 92 such as an iron wire, and the packaging treatment Packer injection hose is additionally installed on the spacer 41, and the grout material is injected throughout the anchor body using the hole hole injection hose 47 'installed up to the tip of the anchor body. Inject grout material using a hose 46 'to inflate the packer 40 to seal the perforation hole 1, and to carry out the third injection into the ground under the packer 40 with the hole injection hose 47'. So that bulbs in the anchorage are formed by pressure grouting And that is characterized.

FIG. 6 is a detailed cross-sectional view of the steel tip anchor head, which has a hole in which the steel wire 2 covered by the steel wire covering material 3 can enter, and the hole prevents penetration of the injection material between the steel wire covering material and the hole. Rubber packaging 13 for forming a tapered hole 11 into which a removal anchored steel wire wedge 14 coupled with an uncoated steel wire 2 can be inserted therein, When pushed in the opposite direction and pulled again, the steel wire may be pulled out, but the wedge 14 further includes a wedge removing spring 12 installed to be separated from the steel wire, and the screw portions provided on the top and bottom of the tip anchor head 10 are separated from each other. (60), characterized in that it comprises a tip anchor head cover (15) having a space such that the wedge (14) is connected to the lower side of the threaded portion and the wedge (14) emerges from the tapered hole (11) when the steel wire (2) is moved. .

7 is a cross sectional view of the combination of the steel wire and the tip anchor head.

Fig. 8 is a perspective view of the combination of the steel wire and the tip anchor head, showing the upper and lower surfaces of the tip anchor head 10. The tapered hole 11 enters the jagger anchor wire wedge 14, and the other side is a circular rubber packaging. (13) was installed in the steel wire cladding material 3 and inserted into the steel wire hole to be waterproof.

9 is a steel wire removal flow chart, Figure (a) is a steel wire wedge 14 for removing anchors in the steel wire (2), Figure (b) is a wedge removal spring (wire) to which the wedge 14 is coupled ( 12) In the open state, pull the steel wire 2 and push it into the tapered hole 11, Figure (c) is injected when the steel wire (2) is completely coupled to the tip anchor head (10) Once the anchor is solidified and the anchor is completed, install the anchor head at the entrance of the anchor to tension the anchor and install it on the structure, and (d) the tip anchor by applying axial force in the opposite direction of tension to remove the anchor body. The removal anchor steel wire wedge 14 installed on the head 10 is removed from the tapered hole 11, and (e) pulls the steel wire in the tension direction again, and the removal anchor wedge 14 is a spring for wedge removal. Steel wires (2) unable to enter into tapered holes (11) by (12) Fall is.

Figure 10 is a detailed view of the wedge removal spring, Figure (a) is a cross-sectional view CC of Figure 6 to fix the wedge removal spring 12 inside the tip anchor head 10 to process the space to move In the state where the spring 12 is installed, it is usually opened to the diameter of the steel wire. (B) shows the open state of the spring 12 when the removal anchor wedge 14 is inserted into the tapered hole 11. Fig. (C) shows the front face of the tip anchor head 10, that is, the cross section DD of Fig. 6, and the adjustment groove 16 is formed on the front of the anchor head, and the end of the wedge removal spring 12 is bent by 90 degrees. The adjustment part 17 was installed, and the adjustment part 17 was made to open the wedge removal spring 12.

11 is a detailed cross-sectional view of the tip anchor head when using a steel bar or rebar, having a hole sized to accommodate the steel bar or rebar 6, and the other side having a double cross section combined with a steel bar or rebar; It is formed by a tapered hole 11 into which a wedge 14 'or a spring with a removing anchor steel wire wedge 70 can be inserted, and when the bar is pushed in the opposite direction during tension and pulled again, the bar 6 The wedges 14, 14 ', and 70 may be separated from the reinforcing bar, and the thread part 60 is installed above and below the tip anchor head 10, and is installed below the screw part to move the steel bar or the reinforcing bar. The wedges 14, 14 ', 70 were provided with a tip anchor head cover 15 having a space enough to be out of the hole, and the other threaded portion was able to fix the cover material 7 of the steel rod or the reinforcing steel. The cladding 7 of the steel bar or reinforcing bar is characterized in that the inner circumferential surface diameter is such that the steel bar or reinforcing bar can be easily pushed into the manpower, and the concave-convex portion 8 is formed at regular intervals to increase the friction force on the outer circumferential surface. It is done.

12 is another example of the detailed cross-sectional view of the tip anchor head, in which the steel wire 2 covered by the steel wire covering material 3 has a hole having a size that can enter a predetermined length, and the hole is disposed between the steel wire covering material and the hole. Packaged by rubber bands to prevent penetration of filler material, the other side having a double cross section with a double cross section combined with an uncoated steel wire 2 or a steel wire wedge for removal anchors with a spring. And formed into a tapered hole 11 into which 70 can enter, and the wedges 14 'and 70 are separated from the tapered hole 11 when the steel wire is pushed in the opposite direction during tensioning. ) Into the inner space to be opened by the elastic restoring force of the ring springs 18 of the wedges 14 'and 70, and when the steel wire is pulled again, the wedges 14' and 70 are formed of the tip anchor head 10. Failed to enter tapered hole (11) Is engaged with the anchor head and the front end surface (10 ') is only fall wire (2). The thread portion 60 and the lower portion of the tip anchor head 10, which is connected to the lower side of the screw portion, and the space so that the wedges 14 ', 70 when the steel wire 2 moves out of the tapered hole 11 A tip anchor head cover 15 having a top surface is provided, and a top surface of the tip anchor head is provided with a waterproof rubber pad bonded with epoxy for double waterproof.

FIG. 13 shows another example of the order of removing the wires, and FIG. (A) shows the wires 2 for the removal anchors having a double cross section 14 'or the wires for the removal anchors 70 having a spring. It is a state which is normally opened by the springs 18 and 75 in one state. (B) and (c) show grout injection when the wedges 14 'and 70 installed in the steel wire 2 are completely engaged with the tapered holes 11 of the tip anchor head 10. When anchoring is completed, anchoring is completed, and when anchoring is completed, anchor head is installed at the entrance of anchor and tensioning anchor is installed on the structure. (D) When removing anchor, the tension is released and unboned steel wire is reversed. When the axial force is pushed in the direction, the wedges 14 'and 70 installed in the tip anchor head 10 are separated from the tapered holes 11 and are opened by the elastic restoring force of the springs 18 and 75 to open the steel wire 2. When pulled again, the wedges 14 'and 70 are caught by the tip anchor head surface 10' so that only the steel wire exits.

14 is a cross-sectional and front view of the packaged spacer, with holes 45, 46, 47 having a diameter such that the steel wire 2 and the injection hose 4 covered by the steel wire covering 3 can barely enter. In order to prevent the loss of the injection material by wrapping the rubber band in the hole covering material (3) and the injection hose (4) in the hole, and to prevent the loss of the injection material, the outer circumferential surface of the spacer is easy to band the packer 40 with an iron wire, etc. One uneven part 48 is provided.

15 is a detailed cross-sectional view of a steel wedge for a removal anchor with a spring, connecting a circular ring 71 into which steel wire 2 or steel rods and reinforcing bars 6 can be inserted and several wedges 72 below the circular ring. There is a connecting portion 73 formed of a male and female connecting ring for enabling the rotation of the wedge using the fixing pin 74, and the fixing pin 74 is formed so that the wedge 72 is opened as shown in FIG. A spring 75 is provided. One connecting portion 73 is provided for each wedge 72 formed in several pieces. The principle of operation is as follows. The connecting portion 73 between the circular ring 71 and the wedge 72 is provided with a spring 78, and the wedge 72 is opened in the usual state as shown in Fig. (A) or (b). When the wedge 72 is retracted as shown in (c), the wedge 70 is inserted into the tapered hole 11 together with the steel wire or the reinforcing bar 6, and then the axial force is applied to the steel wire. Is separated from the tapered hole 11 and the wedge 72 is opened while the compressive force acting on the spring 78 is restored as shown in FIG. Pulling the steel wire or rebar in this state again, the wedge 72 is caught by the tip anchor head 10 so that only the steel wire or the reinforcing bar exits from the tip anchor head.

FIG. 16 is a detailed cross-sectional view and a front view of a removal anchored steel wire wedge having a double cross section, and FIG. (A) is a cross-sectional view and a front view of a steel wire wedge 80 that is currently commonly used, wherein the wedge 80 in the steel wire 2 is shown. If the inner surface of the wedge is installed in close contact with the steel wire, and several pieces of the wedge are in close contact with the front view (SECTION FF). The wedge 80 can never be pulled out of the tapered hole 11 of the anchor head. (B) is a cross-sectional view and a front view of a wedge having a double cross section according to the present invention. When the wedge 14 'is installed on the steel wire 2, the edge portion 77 is added by the elastic force of the ring spring 18. While the wedge 14 'is opened at a constant angle, at this time, the chamfered surface 78 is installed in several pieces of wedges (SECTION GG) so that the edge portion 77 can be folded. In addition, if the tensile force is removed after the tension is characterized in that the wedge (14 '. 70) can be easily separated from the tip anchor head 10 by the attraction force

17 is a detailed cross-sectional view and a front view of the removal anchor steel wire wedge, wherein the wedge 14 is in a state where the inner surface of the wedge is completely in contact with the steel wire, such as a general anchor wedge 80, but the wedge 14 The concave-convex surface inside is smaller than the wedge 80 of the general anchor, and the depth to enter into the tapered hole 11 of the tip anchor head 10 is reduced to remove the anchor tension force after tensioning and push the steel wire 2 easily. The wedge is easily separated from the puddle hole 11, using a non-elastic band 18 "so that the wedges of several pieces are not simply separated.

18 is a perspective view of the steel wire fixing ring, the wedge (14,14 ', 70) using the wedge (14,14', 70), even when fixed and coupled to the steel wire (2) to the tip anchor head (10) during movement and construction of the wedge (14,14) In order to prevent the case where the ', 70' is easily separated from the tip anchor head 10 before the tensioning operation and the tensioning operation is not performed, the steel wire 2 is caught by the steel wire covering material 3 and pushed in the direction of the tip anchor head cover 15. The steel wire fixing ring 90 with the tightening bolt 91 is installed and fixed to the steel wire 2 directly above the steel wire covering member 3 on the side of the anchor body, that is, the side on which the anchor body is installed in the structure. The steel wire can be moved in the direction, but the steel wire can be restrained in the opposite direction.

Advantages of the present invention are as follows.

First, it is possible to remove the anchorage in the ground without disturbing even with small space and small force.

Second, it is economical and shortens the air by forming the anchorage like permanent anchor, which can reduce the length of construction because the anchorage is superior to general anchor.

Third, the tensile strength of the steel wire in the unboned state introduces a compressive stress caused by the grout material over the entire length of the anchor anchoring section, so that the crack does not occur in the section in which the frictional force is formed.

Fourth, the reduction of the pulling force due to the progressive destruction is small.

Fifth, it can be used not only as a temporary anchor but also as a permanent anchor.

Sixth, the length of the free field and the anchorage can be reduced compared to the conventional anchor is economical.

Seventh, by reusing the steel wire, it is economical and there is no environmental pollution due to the disposal of waste materials.

Claims (20)

The grout injection apparatus includes: a wire coating material for making the wire unbonded; A steel wire inserted into the steel wire covering material; Steel wire spacer for maintaining a constant interval of the steel wire; An injection hose installed in the steel wire longitudinal direction in the steel wire spacer; A tip anchor head for fixing and releasing the lower end of the steel wire; A steel wire wedge which can be separated from the tip anchor head by repulsive or compressive force when the steel wire is fixed into the tip anchor head when the steel wire is tensioned into the tip anchor head and the tensile force is removed; A tip anchor head cover packaged by a rubber ring to prevent corrosion of the uncoated steel wire in the tip anchor head; A corrugated pipe having a screw portion at one end connected to the tip anchor head and installed throughout the anchor body; An elastic spacer for maintaining a constant gap in the perforation hole of the corrugated pipe; When the anchor is inserted into the drill hole, the steel wire fixing wedge is installed at the tip of the steel cladding material so as not to be separated from the tip anchor head. Removal anchor injection device using a double anchor head, characterized in that consisting of a steel wire fixing ring having a fastening bolt to be caught. The grout injection apparatus includes: a wire coating material for making the wire unbonded; A steel wire inserted into the steel wire covering material; Steel wire spacer for maintaining a constant interval of the steel wire; Injection hose installed in the longitudinal direction of the steel wire inside the spacer; A tip anchor head for fixing and releasing the lower end of the steel wire; A steel wire wedge which can be separated from the tip anchor head by repulsive or compressive force when the steel wire is fixed into the tip anchor head when the steel wire is tensioned into the tip anchor head and the tensile force is removed; A tip anchor head cover packaged by a rubber ring to prevent corrosion of the uncoated steel wire in the tip anchor head; A corrugated pipe having a screw portion on one side connected to the tip anchor head and installed in a certain section of the anchor body; A packer installed at the end of the corrugated pipe and installed for the purpose of preventing inflow of soil or foreign matter into the corrugated pipe; A spacer having a packaged steel wire hole and an injection hose hole for fixing the packer with an iron wire or a steel band; When the anchor is inserted into the drill hole, the steel wire fixing wedge is installed at the tip of the steel cladding material so as not to be separated from the tip anchor head. Removal anchor injection device using a double anchor head, characterized in that consisting of a steel wire fixing ring having a fastening bolt to be caught. The grout injection apparatus includes: a wire coating material for making the wire unbonded; A steel wire inserted into the steel wire covering material; Steel wire spacer for maintaining a constant interval of the steel wire; Injection hose installed in the longitudinal direction of the steel wire inside the spacer; A tip anchor head for fixing and releasing the lower end of the steel wire; A steel wire wedge which can be separated from the tip anchor head by repulsive or compressive force when the steel wire is fixed into the tip anchor head when the steel wire is tensioned into the tip anchor head and the tensile force is removed; A tip anchor head cover packaged by a rubber ring to prevent corrosion of the uncoated steel wire in the tip anchor head; A rubber pad installed opposite the tip anchor head cover to fix the tip anchor head and the steel wire covering material and to be waterproofed by silicon; When the anchor is inserted into the drill hole, the steel wire fixing wedge is installed at the tip of the steel cladding material so as not to be separated from the tip anchor head. Removal anchor injection device using a double anchor head, characterized in that consisting of a steel wire fixing ring having a fastening bolt to be caught. The grout injection apparatus includes: a wire coating material for making the wire unbonded; A steel wire inserted into the steel wire covering material; Spacer for maintaining a constant interval of the steel wire; Injection hose installed in the longitudinal direction of the steel wire inside the spacer; A tip anchor head for fixing and releasing the lower end of the steel wire; A steel wire wedge which can be separated from the tip anchor head by repulsive or compressive force when the steel wire is fixed into the tip anchor head when the steel wire is tensioned into the tip anchor head and the tensile force is removed; A tip anchor head cover packaged by a rubber ring to prevent corrosion of the uncoated steel wire in the tip anchor head; A rubber pad installed opposite the tip anchor head cover to fix the tip anchor head and the steel wire covering material and to be waterproofed by silicon; A spacer packaged with a rubber band in the steel wire anchorage and free field boundary steel wire covering material and injection hose; A packer fixed to the spacer by an iron wire or a steel band; An injection hose for the cloth packer to inflate the cloth packer with an injection material; When the anchor is inserted into the drill hole, the steel wire fixing wedge is installed at the tip of the steel cladding material so as not to be separated from the tip anchor head. Removal anchor injection device using a double anchor head, characterized in that consisting of a steel wire fixing ring having a fastening bolt to be caught. The grout injection apparatus includes: a reinforcing bar coating material which is formed of irregularities on the outer circumferential surface of the steel rod or reinforcing bar to be unbonded, and has a threaded portion at the distal end thereof to be fixed to the distal anchor head; Steel bars or reinforcing bars inserted into the reinforcing bar covering material; An elastic spacer for maintaining a predetermined gap in the perforation hole of the reinforcing bar; Injection hose installed in the longitudinal direction of the steel wire outside the reinforcing bar; A tip anchor head for fixing and releasing the lower end of the steel bar or rebar; A steel wedge which is separable from the tip anchor head by repulsion or compression when the rod or reinforcing rod is fixed to the tip anchor head when the rod or reinforcing bar is pulled into the tip anchor head and the tensile force is removed; A tip anchor head cover packaged by a rubber ring to prevent corrosion of an uncoated steel bar or reinforcing bar in the tip anchor head; When the anchor is inserted into the drill hole, the steel wire fixing wedge is installed at the end of the steel bar or rebar cladding to prevent separation of the steel anchor from the tip anchor head. A removal anchor injection device using a double anchor head, characterized by consisting of a steel wire fixing ring having a fastening bolt so as to be caught by a rebar cladding material without being pushed. The tip anchor head of claim 1, further comprising: a steel wire hole of a size to accommodate the steel wire covered by the covering material; A circular rubber packaging for preventing penetration of an injection material between the steel wire covering material and the steel wire hole in the steel wire hole; A tapered hole provided on the opposite side of the steel wire hole and into which a removal anchor steel wire wedge coupled with an uncoated steel wire can enter; When the steel wire is pushed in the opposite direction during tension and pulled again, the steel wire may be pulled out, but the wedge removing spring is installed in the tip anchor head to be separated from the steel wire. A spring adjustment unit having an adjustment groove provided at the front end of the tip anchor head capable of adjusting the wedge removal spring; Screw portions provided above and below the tip anchor head; It is installed on the lower side of the screw portion has a space enough for the steel wire fixing wedge to come out of the tapered hole during the movement of the steel wire and has a threaded tip anchor head cover packaged by a rubber ring to prevent corrosion of the uncoated steel wire A removal anchor injection device using a dual anchor head; The tip anchor head of claim 1, further comprising: a steel wire hole of a size to accommodate the steel wire covered by the covering material; A circular rubber packaging for preventing penetration of an injection material between the steel wire covering material and the steel wire hole in the steel wire hole; A tapered hole into which a steel wire wedge having a double cross section coupled to an uncoated steel wire or a steel wire wedge having a spring can be provided opposite to the steel wire hole; A screw unit installed at a lower end of the tip anchor head; A front end anchor head cover having a threaded portion installed at a lower side of the screw portion and having a space such that the steel wire wedge emerges from the tapered hole during the movement of the steel wire and packaged by a rubber ring to prevent corrosion of the uncoated steel wire; Removed anchor injection device using a double anchor head, characterized in that it is provided on the tip anchor head and provided with a rubber pad for waterproofing the steel wire hole and the steel wire covering material. The method of claim 5, wherein the reinforcing bar covering material, the threaded portion formed on the outer peripheral surface of the tube that can be fixed to the tip anchor head; An uneven portion formed over the entire tube after the screw portion; Removed anchor injection device using a double anchor head, characterized in that the inner diameter of the reinforcing bar covering material is formed to a diameter such that the steel bar or reinforcing bar can be easily pushed by the attraction force. 6. The double anchor according to claim 5, wherein the steel bar or reinforcing bar forms a threaded portion at both ends thereof so that one end is fixed to the tip anchor head by a steel wire fixing wedge and the other end is fixed to the structure by a nut. Removal anchor injection device using head. The steel wire wedge of claim 6, wherein the removal anchor steel wire wedge includes: an uneven surface for increasing friction when engaged with the steel wire in the tapered cross section; A sectional surface having a reduced cross-sectional thickness without an uneven portion over the uneven surface; Removal anchor injection device using a double anchor head, characterized in that consisting of an elastic rubber ring is installed so as not to separate the several pieces of wedges on the edge. 8. The steel wire wedge of claim 7, wherein the spring-loaded steel anchor wedge comprises: a circular ring into which the steel wire or steel rod and reinforcing bar can be inserted; A connection part formed of a male and female connection ring for connecting with the wedge under the circular ring, one for each wedge of several pieces; A fixing pin for fixing the connection part to allow rotation of the wedge; A spring installed on the fixing pin; Removed anchor injection device using a double anchor head, characterized in that the wedge yarn is opened when the steel wire is connected to the connection portion is formed in a plurality of pieces formed when installed on the steel wire. 8. The steel wire wedge of claim 7, wherein the wire wedge having a double cross section comprises: an uneven surface for increasing friction when combined with the steel wire in the tapered cross section; A sectional surface having a reduced cross-sectional thickness without an uneven portion over the uneven surface; An elastic ring spring installed on the edge face such that a plurality of wedges are not separated; Removed anchor injection device using a double anchor head, characterized in that it has a chamfered surface that is able to squeeze several pieces of the wedge inward by the elastic force of the ring spring so that the uneven surface is always open. According to claim 1 to claim 5, 6 or 7, wherein the tip anchor head, the anchor head used in the general anchor does not have a heat treatment, and once tensioned, wedge separation is impossible by the attraction force, The front anchor head is characterized in that the wedge and the anchor head can be separated by the attraction force even if the tension force is removed due to the increase in hardness due to the heat treatment, and there is no deformation due to the tension. According to claim 1 to 5, wherein the fixed ring, the wedge is separated from the tip anchor head prior to the tensioning operation, such as when inserting and fixing the anchor in the steel wire of the end of the steel cladding material in the form of a circular ring to move and insert into the drilling hole Removal anchor injection device using a double anchor head, characterized in that it is further provided with a tightening bolt to prevent the slide in the direction of the tip anchor head by the steel wire covering material, and to separate the fixing ring from the steel wire when removing the steel wire. 5. The apparatus of claim 4, wherein the packaged spacer comprises: a hole through which the steel wire and the injection hose covered by the steel wire covering material can barely enter; Packaging to prevent the loss of the injection material by wrapping the rubber band in the steel wire or injection hose in the hole; Removal anchor injection device using a double anchor head, characterized in that the outer peripheral surface of the spacer having a concave-convex portion capable of fixing the packer with an iron wire. Insert the wire into the wire sheath while greased; Installing spacers at regular intervals on the steel wire covering material; An injection hose is installed inside the spacer; Putting a steel wire into the tip anchor head of claim 6 or 7, to securely bond the uncoated steel wire portion to the wedge; Coupling the steel wedge of claim 11 or 12 or 13 to the steel wire; Inserting the steel wedge into a tapered hole of the tip anchor head; Fixing the steel wire fixing ring to the steel wire to prevent movement of the steel wire; Turn the tip anchor head cover to secure it to the tip anchor head; Connecting a corrugated pipe to the tip anchor head; Inserting the above-mentioned anchor body into the drilling hole; Inject the whole body through the anchor using the external injection hose Filling the inside of the corrugation tube using an injection hose; When the injection material is solidified, install an anchor head to tension the steel wire; The anchor tension is released when the anchor is removed; Axial force was applied to the wire and pulled back to remove it from the wire sheath; Filling the wire coating material with submixed cement milk; Removal anchor construction method using a double anchor head, characterized in that consisting of. Insert the wire into the wire sheath while greased; Installing spacers at regular intervals on the steel wire covering material; An injection hose is installed inside the spacer; Putting a steel wire into the tip anchor head of claim 6 or 7, to securely bond the uncoated steel wire portion to the wedge; Coupling the steel wedge of claim 11 or 12 or 13 to the steel wire; Inserting the steel wedge into a tapered hole of the tip anchor head; Fixing the steel wire fixing ring to the steel wire to prevent movement of the steel wire; Connecting a corrugated pipe of a predetermined length to the tip anchor head; A packer is installed at the end of the corrugated pipe and tied with an iron wire; The other end of the packer is fixed with a wire or steel band in the packaged spacing; Inserting the above-mentioned anchor body into the drilling hole; Inject the whole body through the anchor using the external injection hose Filling the inside of the corrugation tube using an injection hose; When the injection material is solidified, install an anchor head to tension the steel wire; The anchor tension is released when the anchor is removed; Axial force was applied to the wire and pulled back to remove it from the wire sheath; Filling the wire coating material with submixed cement milk; Removal anchor construction method using a double anchor head, characterized in that consisting of. Insert the wire into the wire sheath while greased; Installing spacers at regular intervals on the steel wire covering material; An injection hose is installed inside the spacer; Putting a steel wire into the tip anchor head of claim 6 or 7, to securely bond the uncoated steel wire portion to the wedge; Coupling the steel wedge of claim 11 or 12 or 13 to the steel wire; Inserting the steel wedge into a tapered hole of the tip anchor head; Fixing the steel wire fixing ring to the steel wire to prevent movement of the steel wire; Turn the tip anchor head cover to secure it to the tip anchor head; Inserting the above-mentioned anchor body into the drilling hole; Use the injection hose to inject the whole body When the injection material is solidified, install an anchor head to tension the steel wire; The anchor tension is released when the anchor is removed; Axial force was applied to the wire and pulled back to remove it from the wire sheath; Filling the wire coating material with submixed cement milk; Removal anchor construction method using a double anchor head, characterized in that consisting of. Insert the wire into the wire sheath while greased; Installing spacers at regular intervals on the steel wire covering material; Installing a hole for drilling hole injection inside the spacer; Putting a steel wire into the tip anchor head of claim 6 or 7, to securely bond the uncoated steel wire portion to the wedge; Coupling the steel wedge of claim 11 or 12 or 13 to the steel wire; Inserting the steel wedge into a tapered hole of the tip anchor head; Fixing the steel wire fixing ring to the steel wire to prevent movement of the steel wire; Turn the tip anchor head cover to secure it to the tip anchor head; Install a packaged liver price material at the boundary between the fixing book and the free book; Installing a packer and a packer injection hose to the spacer; Inserting the above-mentioned anchor body into the drilling hole; Inject the whole anchor body using the hole injection hose Using a packer injection hose to inflate the packer to pack the perforations; Performing secondary pressure injection using the drilled hole injection hose; When the injection material is solidified, install an anchor head to tension the steel wire; The anchor tension is released when the anchor is removed; Axial force was applied to the wire and pulled back to remove it from the wire sheath; Filling the wire coating material with submixed cement milk; Removal anchor construction method using a double anchor head, characterized in that consisting of. Grease the steel bar or reinforcing bar of claim 9; Putting the steel bar or reinforcing bar into the reinforcing bar covering of claim 8; Installing resilient spacers at regular intervals on the steel bars covered by the rebar covering material; Installing the injection hose in the longitudinal direction of the anchor body; A steel rod or reinforcing bar is inserted into the tip anchor head of claim 6 or 7; Fix the rebar cladding by turning the tip anchor head; Coupling the steel wedge of claim 11 or 12 or 13 to the steel wire; Inserting the steel wedge into a tapered hole of the tip anchor head; Fixing the steel wire fixing ring to the steel wire to prevent movement of the steel wire; Turn the tip anchor head cover to secure it to the tip anchor head; Inserting the above-described anchor body into the drilling hole; Injection is carried out throughout the anchor using an injection hose; When the injection material is solidified, an anchor head is installed at the inlet of the anchor body to tension-fix the steel rod or rebar to the structure using a nut; When removing the anchor, loosen the nut of the anchor head at the entrance of the anchor; Axial force is applied to the steel bar or rebar and pulled back to remove it from the rebar cladding; Filling the reinforcing bar with submixed cement milk; Removal anchor construction method using a double anchor head, characterized in that consisting of.