KR20060068108A - Dismantling equipment of tension member for anchor method - Google Patents

Abstract

In the present invention, when the entire tension member is inserted, the guide member inside the head body can be walked in a state in which the wedge fastener is elastically installed through the link and the prevention cap, so that the work of removing the tension member can be made simple, and the entire tension member is inserted. As a result of the corrosion of the tension member and the wedging sphere are integrated by the corrosion, the solution can be easily solved to remove the tension member to improve the work efficiency.

In order to achieve this, the present invention includes a head body formed with a cone-shaped wedge receiving portion inside the upper end; It is placed in the wedge receiving part of the head body to selectively grasp the tension member, and three wedges are formed in one cone shape so as to have an inlet hole in one circle in the center, and the O-ring is fastened to the O-ring fastening groove at the upper end thereof. A wedge fixture which is provided with a cap of a cap-shaped cross section in an inner groove; A spring installed to elastically support the upper end of the wedge tennis ball; In the anchor material removal device of the anchor method comprising a closing cap which is closed to protect the wedge tennis and the spring in the upper end of the head body, the head body is a first head body formed with a cone-shaped wedge receiving portion, and It is composed of a second head body having a hollow formed by fastening to the upper end of the first head body to secure the movement space of the wedge ball and the installation space of the spring and the upper head of the second head body, ; A guide member fixed to the hollow part to be seated on the stepped portion of the third head body and having a guide groove formed on an inner surface thereof and having a cone-shaped induction guide portion communicating with the guide groove; A link in which the hemispherical protrusion is located in the prevention cap of the wedge and the protrusion protrudes through the long hole of the prevention cap and is fitted into the guide groove of the guide member; Is added.

Anchor method, tension material removal, tension member release

Description

Tension material removal device of anchor method {DISMANTLING EQUIPMENT OF TENSION MEMBER FOR ANCHOR METHOD}

1 is an exploded perspective view showing the configuration of the tension member removal apparatus of the present invention anchor method.

Figure 2 is a cross-sectional view showing the configuration of the tension member removing device of the anchor method according to the present invention.

Figure 3 is a sectional view showing a state in which the tension member is inserted in the anchor member removal apparatus of the anchoring method according to the present invention is released in the binding force between the wedge tennis ball and the tension member.

Figure 4 is a cross-sectional view showing the movement path of the projection of the link moved along the guide groove in the tension member removal device of the anchoring method according to the present invention.

Figure 5a is a schematic diagram showing the movement path of the projection of the link moved along the guide groove according to FIG.

Figure 5b is a cross-sectional view showing a state that the projection of the link is inserted into the guide groove of the guide member which is a constituent portion of the tension member removing device of the anchoring method according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: first head body 11: wedge receiving portion

12: tube 20: wedge tennis ball

21: Wedge 21a: Inlet Hole

21b: groove 22: O-ring

23: O-ring fastening groove 24: Prevention cap

25: spring 30: second head body

40: third head body 41: step

42: hollow 50: guide member

51: guide groove 60: tension member

70: Link 71: Turning

The present invention relates to a tension member removal device used in the ground anchor method for ground excavation in civil engineering, and more specifically, to extend the wedge tennis ball through the link and the prevention cap to the guide member inside the head body by inserting the entire tension member By walking in the state, it is possible to simplify the removal of the tension material, and as a whole, the tension material removal device as well as solve the problems caused by the corrosion of the tension material, and relates to the tension material removal device of the anchoring method to improve the work efficiency. .

In the anchor method, a grout hose and a tension member are inserted into a hole drilled obliquely downward by a perforator, and after grout is injected through the grout hose, the injected grout is cured with the lower body, and then the cured grout and the ground This method is used to reinforce the excavation ground by tensioning the tension member using a tensioner, which is mainly used in civil works such as earthquake construction, stabilization of tunnel shafts, and reinforcement of masonry and retaining walls.

The application of the anchor method has advantages such as effective construction management and shortening of air in urban construction, but the construction of drilling equipment and drilling equipment due to the hypothesis of the tensile material having about 6 times the cross-sectional strength compared to the strength of general rebars in the subsequent construction of adjacent areas. Loss of and air delay occurred. In order to solve this problem, an anchor that can remove the tension member in accordance with the construction process after the completion of the excavation work was developed and used, which is a tension member dismantling device for the anchor method.

The tension material dismantling device for the anchor method has been proposed a myriad of them, but the tension member release device for anchor method is proposed in the Republic of Korea Patent No. 447967.

As can be seen from the claims of the registered patent, in the tension member disassembly apparatus that can pull out the tension member of which one end is fastened to the anchor of the hypothetical ground, the other of the tension member fastened to the anchor and hypothesized in the tension state One end portion (outer side of the ground) is cut to release the tension force, and is installed at one end of the cut tension member to release and release the tension member which is fastened to the anchor. The release has a plurality of strands (for example, seven strands) is formed with a second hole for receiving a tension member twisted to a certain pitch, a male thread is formed at the top and a fixing bolt for selectively fixing the tension member at the tip portion The long pipe-shaped release head is fastened, and the release cover is formed with a third hole having a female thread at the lower end to be engaged with the male screw on the upper end of the release head, and a hooking jaw is formed on the inner surface of the third hole so that some wire of the tension member is caught. It is composed.

The tension member release device having the above configuration is provided with an anchor fastened to the end of the tension member in the ground and a release for releasing and pulling out the tension material fastened to the anchor, so that the anchor is attached to one end of the tension member and handled during transport or transportation. It is possible to prevent the release of the tension member due to the caution of the work (shock), it is possible to fasten the tension member to the anchor and to freely repeat the release from the anchor.

However, in the Patent No. 444767, as a part of a plurality of strands of the strand forming the tension member is pushed by a hammer or the like by inserting a release at the end of the cut tension member, the rest of the wire is relatively retracted from the wedge As the tension member is released, it is inconvenient to have a separate release.

In addition, since the tension member is embedded in the ground in the state of being inserted into the resin pipe which is sealed in the anchor, it is removed after at least several months, and no matter how sealed, water leakage occurs, and thus, the wires forming the tension material The tension member and the wedge are also rusted and sticking to each other (integral phenomenon) due to the problem that the removal of the tension member is not easy to remove the tension member by removing a part of the seven strands.

The present invention has been researched and developed in order to solve the problems caused by removing the tension member of the conventional anchor method as described above, the purpose of which is inserted wedge elastically through the link and the prevention cap to the guide member inside the head body If the fixture is extended and then inserted again, the jam is released and returned to its original position. Thus, the removal of the tension member can be easily performed. As the entire tension member is inserted, the problem caused by the corrosion of the tension member can be solved. It is to provide an anchor removal device of the anchoring method to improve the efficiency and to be able to reinstall the tension material if necessary.

The present invention for achieving the above object is a head body formed with a cone-shaped wedge receiving portion inside the upper end; It is placed in the wedge receiving part of the head body to selectively grasp the tension member, and three wedges are formed in one cone shape so as to have an inlet hole in one circle in the center, and the O-ring is fastened to the O-ring fastening groove at the upper end thereof. A wedge fixture which is provided with a cap of a cap-shaped cross section in an inner groove; A spring installed to elastically support the upper end of the wedge tennis ball; In the anchor material removal device of the anchor method comprising a closing cap which is closed to protect the wedge tennis and the spring in the upper end of the head body, the head body is a first head body formed with a cone-shaped wedge receiving portion, and It is composed of a second head body having a hollow formed by fastening to the upper end of the first head body to secure the movement space of the wedge ball and the installation space of the spring and the upper head of the second head body, ; A guide member fixed to the hollow part to be seated on the stepped portion of the third head body and having a guide groove formed on an inner surface thereof and having a cone-shaped induction guide portion communicating with the guide groove; A link in which the hemispherical protrusion is located in the prevention cap of the wedge and the protrusion protrudes through the long hole of the prevention cap and is fitted into the guide groove of the guide member; Is added.

The second and third head bodies may be separately provided, but may be integrally provided to simplify components.

The guide groove of the guide member is formed such that the projection of the link is caught up and down the top dead center of the guide groove and again the projection of the link rises to the top dead center of the guide groove and descends to the induction guide.

The structure and operation of the tension member removing apparatus of the anchor method of the present invention will become more apparent from the following description based on the accompanying drawings.

1 is an exploded perspective view showing the configuration of the tension member removing device of the anchor method of the present invention, Figure 2 is a cross-sectional view showing the configuration of the tension material removing apparatus of the anchor method according to the present invention.

As shown in the figure, the tension member removing device of the anchor method of the present invention includes a first head body 10, a wedge fastener 20 that is elastically installed inside the first head body 10, and the first head. The second head body 30 is screwed to the upper end of the body 10, the third head body 40 is screwed to the wedge bucket 30, and the guide is configured to be inserted into the third head body Guides penetrate the member 50, the tension member 60 selectively gripped by the wedge fasteners 20 in the first head body 10, and the prevention cap 24 provided in the wedge process tool 20. Link 70 is guided to the member 50 and the closing cap 80 is fastened to the upper end of the third head body to prevent the separation of the guide member 50 installed inside the third head body It is composed.

The first head body 10 has a wedge accommodating portion 11 which is opened up and down and has a concave shape at least with a wide top inlet and a narrow bottom. The wedge accommodating portion 11 is a wedge. The fixture 20 is formed at the same inclination angle as the outer inclined surface.

In addition, even if the tension member 60 is inserted into the lower portion of the first head body 10, the plastic tube 12 is inserted to maintain the airtightness with the outside so that water penetrates into the first head body 10. To prevent corrosion at the same time to prevent the corrosion and to prevent the tension member 60 is combined with the grout.

The wedge fixture 20 is settled in the wedge receiving portion 11 of the first head body 10 and has three wedges 21 in one cone shape so as to have one circular inlet hole 21a at the center thereof. It is formed in, the circumference of the upper portion is formed with an O-ring fastening groove 23 is fastened to the O-ring 22 to expand the three wedges 21, the inner surface of the groove 21b for installation of the prevention cap 24 ) Is formed. The prevention cap 24 is formed in a cap shape of which the lower end is opened and a long groove 24a is formed at the upper end.

In addition, the inner surface of the wedge fixture 20 is formed with a sawtooth irregularities to prevent the tension member 60 from slipping or leaving the wedge fixture 20 when the tension member 60 is tensioned.

In addition, a spring 25 is placed on the upper end of the wedge tennis ball 20 so that a force for always pushing the wedge tennis ball 20 toward the wedge accommodation portion 11 side of the first head body 10 acts. have.

The third head body 40 has a hollow portion 42 which is screwed with the second head body 30 and has a stepped portion 41 formed at one end and opened to both sides.

Although the second head body 30 and the third head body 40 are separately provided and illustrated as being screwed together, the second and second head bodies 30 and 40 are screwed together as necessary. It may be configured to extend in the upper end of the second head body 20 is not there.

The guide member 50 is formed in a semi-circular shape and two divided guide members 50a and 50b having respective guide grooves 51 therein are formed into one cylindrical shape in contact with each other. At the lower end of the guide member 50 in communication with the 51, the induction portion 52 is formed, respectively. When the guide groove 51 is pushed upward by the tension member 60 in the drawing, the protrusion 71 of the link 70 to be described later together with the prevention cap 24 rises to the top dead center of the guide groove 51. When it is caught while falling down and the tension member 60 is pushed upward, the protrusion 71 of the link 70 rises to the top dead center of the guide groove 51 and is formed to descend to the induction guide 52.

"형상으로 형성될 수 있다.The guide groove 51 formed in the recess of the guide member 50 is not limited,

Can be formed into a shape.

The tension member 60 is a wire of 7 strands is twisted into one, which is drawn from the first head body 10 is installed in contact with the lower end of the link 70 in the prevention cap (24).

In addition, the link 70 is the inner guide groove of the split guide members 50a and 50b constituting the guide member 50 due to the force pushed by the tension member 60 or returned by the spring 25 ( The protrusions 71 introduced into 51 and moved along the guide grooves 51 protrude from both sides at the upper ends, respectively, and are installed through the long grooves 24a of the prevention cap 24 at the lower ends of the links 70. Hemispherical protrusions 72 are provided so as not to be separated from the separation. Any one of the protrusions 71 and the hemispherical protrusions 72 of the link 70 should be assembled in a state of penetrating the long groove 24a of the prevention cap 24.

The tension member removal apparatus of the present invention is configured as described above, as in the conventional anchor, the wedge fixture 20 elastically installed inside the first head body 10 is installed to grip the end of the tension member 6, but downward It is inserted into the grouting hole of the perforated ground in an inclined state, and the grout is filled and cured. Then, the tension member 60 is installed to install a tensile force by applying a tensioner from the outside. After tensioning the tension member 60 as described above, the tensioner is separated from the tension member 60 and removed.

In this state, in order to remove the tension of the tension member by completing all the construction and do not need an anchor, first, the tension member 60 is cut out of the portion exposed to the outside from the ground to release the tensile force, and then the tension member of the cut portion ( When hitting and inserting (60), the tension member (60) is inserted toward the guide member (50) configured to be inserted into the third head body (40) while the tip side of the tension member (60) is the prevention cap ( As the wedge 24 is pushed in, the wedge fixture 20 accommodating the prevention cap 24 is moved to start deviating from the wedge receiving portion 11 of the first head body 10.

As the tension member 60 is applied with a predetermined force in the longitudinal direction as described above, the end of the tension member 60 is pushed toward the guide member 50 and the prevention cap 24 and the end of the tension member 60 are prevented. Since the link 70 is inserted together, the protrusion 71 of the link 70 is caught up while descending as shown in FIG. 4 after rising to the top dead center of the guide groove 51 of the guide member 50 as shown in FIG. 3.

When the guide groove 51 of the guide member 50 is caught in this way, the prevention cap 24 is suspended from the hemispherical portion 72 at the lower end of the link 70, and the prevention cap 24 is further provided with the wedging fixture 20. Since it is in the hanging state, as shown in FIG. 3, the wedge fixture 20 which fixed (gripping) the tension member 60 is out of the wedge accommodating part 11 of the 1st head body 10. As shown in FIG.

Therefore, the wedge tennis ball 20 has a recess 21b in which the wedge 21 is installed on the inner surface of the wedge 21 by the O-ring 22 fastened to the O-ring fastening groove 23 of the upper portion of the wedge 21. Since it is extended to the center, thereby releasing the binding force of the wedges 21 holding the outer circumferential surface of the tension member 60 can be removed by grasping and pulling out the end of the tension member 60 exposed to the outside.

As described above, because the entire tension member 60 is moved in the longitudinal direction, even if the wires of the various strands constituting the tension member 60 are not affected, the wedge tennis ball 20 holding the end of the tension member 60 is not affected. Even if the wedges 21 are corroded, no obstacle is caused to move in the longitudinal direction of the tension member 60, so that the removal of the tension member 60 is easily performed.

When the tension member 60 is removed as described above and reinserted as necessary, when the tension member 60 is inserted into the plastic tube 12, the end of the tension member 60 is wedge 21 of the wedge fixture 20. As they are expanded into the open wedge fixture 20, the prevention cap 24 and the link 70 is pushed. Thus, the projection 71 of the link 70 ascends to the top dead center of the guide groove 51 of the guide member 50 and is pushed down by the elastic force of the spring 25, so that the projection 71 of the upper end of the link 70 is The induction guide 52 is located.

As described above, the wedge process tool 20 is inserted into the wedge receiving part 11 of the first head body 10 while the retracting member 60 is retracted in the opposite direction in which the tension member 60 is inserted together with the wedges 21 of the wedge fixture 20. Since the tension member 60 is held, the tension member 60 is held. When gripped in this way it is possible to install a tensioner to act as a tensioner to the tension member 60 exposed to the outside.

As described above, the anchor member removal apparatus of the anchoring method according to the present invention, when the entire tension member is inserted, the wedge tennis ball is elastically installed through the link and the prevention cap to the guide member inside the head body, and is reinserted. If the tension is released, it is returned to its original position, and the removal of the tension member is made simple. As the entire tension member is inserted, even if the tension member is corroded or the tension member and wedge fixture are integrated by the corrosion, the tension member can be easily solved. This improves work efficiency.

In addition, since there is no need for a separate device for removing the tension member, it is a useful invention to prevent unnecessary personnel filling and thus increase the operating cost.

In addition, the present invention is a corrosion of the tension member when left for a long time due to construction delay, etc. in the state in which the tension member is installed with the anchor in the excavation hole of the ground, if the corrosion occurs in this way is accompanied by a cross-sectional reduction of the tension member It is a useful invention that can replace and install a tension member with a new material when the tension member is destroyed or destroyed.

Claims (3)

A head body having a cone-shaped wedge accommodating portion formed inside the upper end; It is placed in the wedge receiving part of the head body to selectively grasp the tension member, and three wedges are formed in one cone shape so as to have an inlet hole in one circle in the center, and the O-ring is fastened to the O-ring fastening groove at the upper end thereof. A wedge fixture which is provided with a cap of a cap-shaped cross section in an inner groove; A spring installed to elastically support the upper end of the wedge tennis ball; In the anchor material removal device of the anchor method comprising a closing cap which is closed to protect the wedge tennis ball and the spring in the upper end of the head body, The head body includes a first head body having a cone-shaped wedge receiving portion, a second head body fastened to an upper end of the first head body to secure a space for movement of the wedge and a spring and an installation space of the second head body. It is composed of a third head body having a hollow portion is fastened to the upper end is formed; A guide member fixed to the hollow part to be seated on the stepped portion of the third head body and having a guide groove formed on an inner surface thereof and having a cone-shaped induction guide portion communicating with the guide groove; A link in which the hemispherical protrusion is located in the prevention cap of the wedge and the protrusion protrudes through the long hole of the prevention cap and is fitted into the guide groove of the guide member; Tension material removal apparatus of the anchor method, characterized in that the addition. The method of claim 1, The guide groove of the guide member is caught as the projection of the link goes up and down the top dead center of the guide groove and again the projection of the link goes up to the top dead center of the guide groove and descends to the induction guide.

"Tension member removal apparatus of the anchor method, characterized in that formed in the shape. The method of claim 1, The second and third head body is a tension member removal apparatus of the anchor method, characterized in that provided as being integrated into one member.

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