KR101230174B1 - Removable anchor - Google Patents

Abstract

PURPOSE: A removable anchor is provided to easily remove a steel wire bound to an anchor head by blocking inflow of a grouting material to an inside of a head unit. CONSTITUTION: A removable type anchor comprises an anchor head and a steel wire(1). The anchor head is inserted into a borehole of a surface, and the steel wire is bonded to the anchor head. The anchor head comprises a first head unit(110), a second head unit(120), a third head unit(130), a wedge member(160), a holder member(170), a holder support member(180), a first sealing member(151), and a second sealing member(153). The first head unit has an end projection(115) in which a steel wire insertion groove(113) is formed, wherein an end of a steel wire is inserted into the steel wire insertion groove when a tensile force which is applied to the steel wire is removed. The second head unit is combined with the first head unit. The third head unit is combined with the second head unit. The wedge member is disposed on an outer surface of the steel wire to fix the steel wire in the second head unit. The holder member is disposed in the second head unit, and the wedge member is inserted into the holder member. At least a part of the holder supporting member is disposed in the second head unit and supports the holder member. The first sealing member is disposed between the first and second head units to block inflow of a grouting material to an internal space of the first and second head units. The second sealing member is disposed between the second and third head units to block inflow of a grouting material to an internal space of the second and third head units.

Description

Removable Anchor}

The present invention relates to a removable anchor, and more particularly to a removable anchor that is easy to remove the steel wire after installation of the anchor.

In general, anchors are widely used to prevent soil collapse during construction of excavation works for construction and civil engineering works, and to prevent soil loss from soft ground incision surface. The anchor includes an anchor head and a tension member engaged with the anchor head.

When the anchor is installed on the ground, the anchor head is inserted into the anchor hole of the ground, and is firmly fixed to the ground by grouting. Thereafter, the tension is applied to the free end of the tension member and the tension is fixed with an external fixing device.

The tension member used in the anchor uses a strand made of twisted steel strands, the strand is superior to the general reinforcing bar, if left in the ground as it is an obstacle to the ground and becomes a ground obstacle in the future development of the adjacent land, etc. There is a risk of causing problems. To solve this problem, it is necessary to remove the tension member buried in the ground after the completion of the construction.

Republic of Korea Patent Publication No. 10-0958158 (name of the invention: removable anchor)

The problem to be solved of the present invention is to provide a removable anchor easy to remove the steel wire after installation.

In order to solve the above problems, the present invention includes an anchor head which is inserted into the drilling hole of the ground, and the steel wire is coupled to the anchor head, the anchor head is inserted into one end of the steel wire is inserted when the tension is removed A first head unit having a stepped groove formed therein, a second head unit having a hollow shape and coupled to the first head unit, a third head unit having a hollow shape and coupled to the second head unit, and the steel wire A wedge member disposed on an outer surface of the steel wire to fix the inside of the second head unit, a holder member disposed inside the second head unit and into which the wedge member is inserted, and at least a portion of the second head A holder support member disposed inside the unit to support the holder member, and disposed between the first head unit and the second head unit, wherein the first head unit and A first sealing member which blocks the grouting material from being inserted into the inner space of the second head unit, and disposed between the second head unit and the third head unit, Provided is a removable anchor comprising a second sealing member to block the grouting material from being inserted into the interior space.

The third head unit includes a third front coupling portion coupled to the second head unit, and a third head body integrally formed with the front coupling portion, wherein the third head body surrounds the steel wire. It may include a first hollow portion disposed in close contact with the second hollow portion having a larger diameter than the first hollow portion.

The anchor head further includes a third sealing member disposed at a point where the first hollow portion, the second hollow portion, and the steel wire protecting tube contact each other to block the grouting material from being inserted into the inner space of the third head unit. It may include.

The anchor head may further include an elastic member disposed between the third sealing member and the holder member to press the third sealing member.

The holder support member may include a support leg for supporting the holder member and a support plate for supporting the holder leg when the tension of the steel wire is slid with respect to the outer surface of the holder member and the tension of the steel wire is completed. Can be.

A locking portion may be formed at an end of the support leg, and a guide groove for guiding the movement of the locking portion may be formed at an outer surface of the holder member.

The anchor head may further include a fourth head unit having a hollow shape and coupled to the third head unit, and a fourth sealing member disposed between the third head unit and the fourth head unit.

And an anchor head cap surrounding the anchor head, wherein the anchor head cap includes a cap body disposed at a front end of the anchor head, a cap blade hinged to a rear edge of the cap body, and a rear end of the anchor head. It may include a cap plate for supporting, and a connecting link connecting the cap blade and the cap plate.

When the anchor head is moved backward, the connection link is unfolded and the rear end of the cap blade connected to the connection link is opened and the outer surface of the cap plate may be fixed to the inner wall of the drilling hole.

The effect on the removable anchor according to the present invention is as follows.

First, the anchor head is composed of a combination of a plurality of head units, and a sealing member is installed between the head units to prevent the grouting material from flowing into the head unit. There is an advantage that can be easily removed.

Second, by forming the steel wire insertion groove in the inside of the first head unit, the tensile force pulling the steel wire is removed and the steel wire is compressed by the elastic restoring force of the steel wire, and the wedge at the stepped portion of the first head unit. By having the member separate, there is an advantage that the steel wire can be simply removed after grouting without the need for a separate process for removing the steel wire.

Third, there is an advantage that a plurality of anchor heads can be more efficiently and stably arranged by installing one anchor head to be coupled to the steel wire of another neighboring anchor head.

Fourth, there is an advantage that can be fixed to the ground more stable by installing the anchor head cap on the outer surface of the anchor head to be fixed to the wall surface of the drilling hole.

1 is an exploded perspective view showing an embodiment of an anchor head of a removable anchor according to the present invention.
2 is a cross-sectional view of the anchor head of FIG.
FIG. 3 is an exploded perspective view of main parts disposed in the anchor head of FIG. 1.
4 is a cross-sectional view illustrating a state in which a steel wire is tensioned in the removable anchor of FIG. 1.
5 is a cross-sectional view showing a state in which the tensile force applied to the steel wire is removed from the removable anchor of FIG.
6 is a view illustrating a removable anchor showing a state in which a plurality of anchor heads of FIG. 1 are installed.
7 is a view illustrating a state in which the anchor head 켑 is fitted to the anchor head of FIG. 1.
8 is a view showing a state in which the anchor head 끼워 inserted into the anchor head of FIG. 1 is fixed to the inner wall of the drilling hole.

With reference to the accompanying drawings, a removable anchor according to the present invention will be described.

1 to 5, an embodiment of an anchor head of a removable anchor according to the present invention will be described.

The present invention includes an anchor head (100) inserted into a drilling hole of the ground, and a steel wire (1) coupled to the anchor head (100).

The anchor head 100 includes a first head unit 110, a second head unit 120, a third head unit 130, a fourth head unit 140, a first sealing member 151, and a second sealing. The member, the third sealing member 155 and the fourth sealing member 157 are included.

The first head unit 110 includes a first head body 111 and a first head coupling portion 117 extending on one side of the first head body 111.

The first head body 111 includes a stepped portion 115 having a steel wire insertion groove 113 into which one end of the steel wire 1 is inserted when the tensile force applied to the steel wire 1 is removed. The first jig groove 111a into which the jig used when the first head unit 110 and the second head unit 120 are coupled is formed on the outer surface of the first head body 111.

The second head unit 120 includes a second head body 121, a second front coupling part 123 protruding from one end of the second head body 121, and the second head body 121. It includes a second rear coupling portion 125 formed at the other end of the.

The second front coupling part 123 is screwed to the first head coupling part 117, and the first sealing member is connected between the first head coupling part 117 and the second front coupling part 123. 151 is installed.

The first sealing member 151 blocks the grouting material from flowing into the first head unit 110 and the second head unit 120 when grouting after the anchor head 100 is installed.

That is, the first sealing member 151 is disposed between the first head unit 110 and the second head unit 120 of the first head unit 110 and the second head unit 120. This prevents the grouting material from being inserted into the interior space. The second head body 121 has a hollow shape and has a constant inner diameter.

A second jig groove into which an jig used to rotate the second head unit 120 is inserted into an outer surface of the second head body 121 when the second head unit 120 is coupled to another component. 121a is formed.

The third head unit 130 includes a third head body 131, a third front coupling part 133 protruding from one end of the third head body 131, and the third head body 131. It includes a third back coupling portion 135 formed at the other end of the.

The third front coupling portion 133 is integrally formed with the third head body 131 and screwed with the second rear coupling portion. The second sealing member 153 is installed between the second rear coupling portion 125 and the third front coupling portion 133.

The second sealing member 153 blocks the grouting material from flowing into the second head unit 120 and the third head unit 130. That is, the second sealing member 153 is disposed between the second head unit 120 and the third head unit 130 so that the second head unit 120 and the third head unit 130 are separated. This prevents the grouting material from being inserted into the interior space.

The third head body 131 has a first hollow portion 131b disposed closely to the steel wire protecting tube 10 surrounding the steel wire 1, and a second diameter having a larger diameter than the first hollow portion 131b. The hollow part 131c is included.

The third sealing member 155 is disposed at a point where the first hollow portion 131b, the second hollow portion 131c, and the steel wire protecting tube 10 contact each other. The third sealing member 155 blocks the grouting material from being inserted into the inner space of the third head unit 130.

A third jig groove is inserted into the outer surface of the third head body 131 is used to rotate the third head unit 130 when the third head unit 130 and the other components are combined. 131a is formed.

The fourth head unit 140 has a hollow shape and is coupled to the third head unit 130. In detail, the fourth head unit 140 includes a fourth head body 141, a fourth front coupling part 143 protruding from one end of the fourth head body 141, and the fourth head body. It includes a fourth back coupling portion 145 protruding from the other end of the (141).

The fourth front coupling part 143 is screwed to the third rear coupling part 135, and the fourth sealing member is disposed between the fourth front coupling part 143 and the third rear coupling part 135. 157 is disposed.

The fourth sealing member 157 blocks the grouting material from flowing into the inner space of the third head unit, that is, the space of the second hollow part 131c.

As a result, the fourth sealing member 157 primarily seals between the steel wire protective tube 10 and the inner surface of the third head body 131, and the third sealing member 155 may be the steel wire protective tube ( 10) and secondary sealing between the inner surface of the third head body 131.

The steel wire protective tube 10 is provided with a plastic material, the thread is formed on the fourth rear coupling portion 145 is coupled to the fourth rear coupling portion 145 in the form of interference fit. Can be.

Meanwhile, the anchor head 100 further includes a wedge member 160, a holder member 170, a holder support member 180, and an elastic member 190.

The wedge member 160 is disposed on an outer surface of the steel wire 1 to fix the steel wire 1 in the second head unit 120.

The wedge member 160 includes three wedge pieces, and the steel wire 1 is inserted into the holder member 170 in a state surrounded by the three wedge pieces.

The holder member 170 includes a cylindrical body 171, and the cylindrical body 171 has an inner diameter 175 of the cylindrical body that gradually decreases from one end of the wedge member 160 to a predetermined region. .

As a result, when the steel wire 1 is tensioned, the steel wire 1 is inserted into the cylindrical body 171 in a state surrounded by the wedge member 160 and the steel wire 1 is tensioned. Accordingly, the wedge member 160 is fixed to the inside of the holder member 170 in a state of holding the steel wire 1 firmly.

At least a portion of the holder support member 180 is disposed inside the second head unit 120. The holder support member 180 includes a support leg 183 and a support plate 181 for supporting the support leg 183.

The support leg 183 slides with respect to an outer surface of the holder member 170 when the steel wire 1 is tensioned, and supports the holder member 170 when the tension of the steel wire 1 is completed. .

The edge of the support plate 181 is disposed on the stepped portion 115 and is coupled to the first head unit 110 by the coupling of the first head coupling portion 117 and the second front coupling portion 123. It is stably fixed between the second head unit 120.

The support leg 183 includes a leg head 185 coupled to the support plate 181 and a locking portion 183a corresponding to the guide groove 173 formed on the outer surface of the holder member 170. .

Here, the guide groove 173 is formed to be inclined inclined to the outer surface of the holder member 170 to guide the movement of the locking portion (183a).

As shown in FIG. 4, when the holder member 170 moves together with the movement of the steel wire 1 when the steel wire 1 is tensioned, the catching portion 183a opens the guide groove 173. Sliding along. Here, the recessed depth of the guide groove 173 is formed differently along the longitudinal direction of the holder member 170.

The elastic member 190 is disposed between the third sealing member 155 and the rear end of the holder member 170. When the steel wire 1 is tensioned, the holder member 170 is moved in the right direction on the drawing of FIG. 4. Then, the elastic member 190 is compressed to press the third sealing member 155.

Here, as the rear end of the holder member 170 hits the front end surface of the third head body 131, the holder member 170 is no longer moved in the right direction.

At this time, the front end of the holder member 170 to support the front end of the holder member 170 while the engaging portion (183a) is out of the guide groove 173.

Referring to Fig. 5, the process of releasing the wedge member holding the steel wire from the steel wire when the tensile force applied to the steel wire is removed.

When the tensile force acting on the steel wire 1 is removed, the steel wire 1 is momentarily moved to the left in the drawing of FIG.

Here, since the steel wire 1 and the wedge member 160 are physically pressed in the tensioning process of the steel wire 1, the wedge member 160 is firmly attached to the steel wire (1). Therefore, when the tensile force acting on the steel wire 1 is removed, the steel wire 1 and the wedge member 160 move together in the left direction. At this time, the holder member 170 is supported by the holder support member 180 to maintain a stationary state.

When the steel wire 1 and the wedge member 160 is moved to the left side, one end of the left side of the steel wire 1 flows into the steel wire insertion groove 113. However, although the diameter of the steel wire insertion groove 113 is larger than the diameter of the steel wire (1), the wedge member (because it is formed smaller than the diameter in consideration of the thickness of the wedge member 160 attached to the steel wire ( 160 is caught by the support plate 181 supported by the step portion 115.

As a result, the left end of the steel wire is inserted into the steel wire insertion groove 113 by a predetermined length, that is, longer than the point where the wedge member 160 is attached, so that the wedge member 160 is connected to the steel wire ( Departure from 1).

When the steel wire 1 is pulled in the right direction in the drawing of FIG. 5 after the wedge member 160 is separated from the steel wire 1, the steel wire 1 is easily removed from the anchor head 100. Can be separated.

Referring to Figure 6, when the removable anchor according to the present invention will be described as follows.

Removable anchor according to the present invention is the anchor head 100 described with reference to Figures 1 to 5, the second anchor head 200, the third anchor head 300 is installed adjacent to the anchor head 100, And a fourth anchor head 400.

The steel wire 1 and the steel wire protective tube 10 described with reference to FIGS. 1 to 5 are coupled to the anchor head 100, and the second steel wire portion 20 is coupled to the second anchor head 200. The third steel wire part 30 is coupled to the third anchor head 300, and the fourth steel wire 1 part is coupled to the fourth anchor head 400.

A second fixing unit 210 is provided on the outer surface of the second anchor head 200 to fix the steel wire protecting tube 10 to the outer surface of the second anchor head 200. For example, the second fixing unit 210 may be configured to include a ring surrounding the steel wire protection tube 10, and a coupling member for fixing the ring to the outer surface of the second anchor head 100. have.

In addition, a third fixing unit 310 for fixing the steel wire protection tube 10 to the outer surface of the third anchor head 300 is also provided on the outer surface of the third anchor head 300.

Similarly, a fourth fixing unit 410 is provided on the outer surface of the fourth anchor head 400 to fix the second steel wire portion 20 to the outer surface of the fourth anchor head 400.

As a result, the anchor head 100, the second anchor head 200, the third anchor head 300, and the fourth anchor head 400 are combined in a mass so that the anchor head 100 is more stably fixed to the ground during grouting. It becomes possible. In addition, even if the number of steel wires used in the removable anchor increases, it can be easily removed in the future for each steel wire.

7 and 8, another embodiment of the removable anchor according to the present invention will be described.

The removable anchor according to the present embodiment includes an anchor head 100, an anchor head cap surrounding the anchor head 100, and a steel wire 1 coupled to the anchor head 100.

Since the internal structure of the anchor head 100 and the coupling structure of the anchor head 100 and the steel wire 1 are substantially the same as the above-described embodiment, a detailed description thereof will be omitted.

The anchor head cap has a cap body 1100 disposed at the front end of the anchor head 100, a cap blade 1200 hinged to the rear edge of the cap body 1100, and the anchor head 100 Cap plate 1300 for supporting the rear end, and the connection link 1400 for connecting the cap blade 1200 and the cap plate 1300.

The cap body 1100 may include a cap head 1110 fixed to a bottom surface of a hole in the ground, a head connection portion 1120 formed at a rear edge of the cap head, the head connection portion 1120 and the cap blades 1200. It includes a first pin 1130 for hinge coupling.

The cap head 1110 has a ballistic shape of a missile, and the head connection portion 1120 has four protrusions formed at the rear edge of the cap head.

The capblade 1200 includes a blade body 1210 and a second pin 1230 for hinge coupling the blade body 1210 and the connection link 1400. The inner surface of the blade body 1210 has a smooth shape, the outer surface of the blade body 1210 has a sawtooth shape.

One end of the blade body 1210 is hinged to the head connector 1120 by the first pin 1130, and the other end is hinged to the connection link 1400 by the second pin 1230. .

The cap plate 1300 is in contact with the rear end of the anchor head 100 receives a force from the rear end of the anchor head 100. The cap plate 1300 hinge-couples the cap plate body 1310, the link connecting portion 1320 protrudingly connected from the cap plate body 1310, and the link connecting portion 1320 and the connecting link 1400. And a third pin 1330 for the same.

As shown in FIG. 8, when the operator pulls the anchor head 100 to the rear in the drawing, the cap plate 1300 is moved to the rear, and the connection link 1400 is expanded, and the connection link 1400 is The cap blades 1200 are opened by being unfolded.

When the cap blade 1200 is opened, the cap blade 1200 is fixed to the inner wall surface of the drilling hole, thereby fixing the anchor head cap to the drilling hole.

As a result, the grouting operation is performed in a state where the anchor head cap coupled to the anchor head 100 is fixed to the wall surface of the punching hole, so that the removable anchor can be fixed to the ground more stably and firmly. .

As described above, the present invention is not limited to the above-described specific preferred embodiments, and various modifications may be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. It is possible and such variations are within the scope of the present invention.

1: steel wire 100: anchor head
110: first head unit 120: second head unit
130: third head unit 140: fourth head unit
151: first sealing member 153: second sealing member
155: third sealing member 157: fourth sealing member
160: wedge member 170: holder member
180: holder support member 190: elastic member
200: second anchor head 300: third anchor head
400: fourth anchor head 1100: cap body
1200: cap blade 1300: cap plate
1400: connection link

Claims (9)

An anchor head inserted into a drilling hole of the ground; And,
It includes a steel wire coupled to the anchor head,
The anchor head has a first head unit having a stepped portion formed with a steel wire insertion groove into which one end of the steel wire is inserted when the tensile force is removed;
A second head unit having a hollow shape and coupled to the first head unit,
A third head unit having a hollow shape and coupled to the second head unit;
A wedge member disposed on an outer surface of the steel wire to fix the steel wire inside the second head unit;
A holder member disposed inside the second head unit and into which the wedge member is inserted;
At least a portion of the holder supporting member disposed inside the second head unit to support the holder member;
A first sealing member disposed between the first head unit and the second head unit to block the grouting material from being inserted into an inner space of the first head unit and the second head unit;
A second sealing member disposed between the second head unit and the third head unit to block the grouting material from being inserted into an inner space of the second head unit and the third head unit,
The holder support member includes a support leg for supporting the holder member and a support plate for supporting the holder leg when the tension of the steel wire is slid with respect to the outer surface of the holder member and the tension of the steel wire is completed. Removable anchor, characterized in that. The method of claim 1,
The third head unit includes a third front coupling portion coupled to the second head unit, and a third head body integrally formed with the front coupling portion, wherein the third head body surrounds the steel wire. And a first hollow portion disposed closely to the second hollow portion, and a second hollow portion having a diameter larger than that of the first hollow portion. The method of claim 2,
The anchor head further includes a third sealing member disposed at a point where the first hollow portion, the second hollow portion, and the steel wire protecting tube contact each other to block the grouting material from being inserted into the inner space of the third head unit. Removable anchor, characterized in that it comprises. The method of claim 3,
The anchor head further comprises a resilient member disposed between the third sealing member and the holder member for pressing the third sealing member. delete The method of claim 1,
Removable anchor, characterized in that the engaging portion is formed at the end of the support leg, the guide groove for guiding the movement of the engaging portion is formed on the outer surface of the holder member. The method of claim 1,
The anchor head further includes a fourth head unit having a hollow shape and coupled to the third head unit, and a fourth sealing member disposed between the third head unit and the fourth head unit. The method according to any one of claims 1 to 4, 6 and 7,
And an anchor head cap surrounding the anchor head, wherein the anchor head cap includes a cap body disposed at a front end of the anchor head, a cap blade hinged to a rear edge of the cap body, and a rear end of the anchor head. And a cap plate for supporting and a connecting link connecting the cap blade and the cap plate. 9. The method of claim 8,
When the anchor head is moved backwards, the connecting link is unfolded and the rear end of the cap blade connected to the connecting link is opened and the outer surface of the cap plate is fixed to the inner wall of the drilling hole. .

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