KR200443047Y1 - Anchoring element for ground anchor - Google Patents

Abstract

The present invention relates to an anchor body for a ground anchor, which makes it possible to easily separate and remove a tension member in an anchor construction method for fixing temporary temporary walls and the like.

The anchor body of the present invention, the upper body 21 having a hollow (H); An upper end screwed to a lower end of the upper body 21 and a lower body 22 having an upwardly open recessed groove G formed therein; Wedge cone 23 is inserted into the hollow (H) of the upper body 21; A connector 24 coupled to the lower end of the wedge cone 23 and extending downward into the concave groove G; A support plate 25 coupled to the lower end of the connector 24; It consists of an elastic body 26 etc. which are interposed between the bottom face of the support plate 25 and the bottom surface of the recessed groove G.

The ground anchor anchor body of the present invention has the advantage that the structure is simple, the manufacturing cost is reduced, and separation of the tension member is ensured.

Anchor, anchor body, nail, grouting, mortar

Description

Anchoring element for ground anchor

1 is a cross-sectional view of a conventional anchor body.

Figure 2 is a perspective view of the anchor body of the first embodiment of the present invention.

Figure 3 is an exploded perspective view of the anchor body of the first embodiment of the present invention.

Figure 4 is an exploded cross-sectional view of the anchor body of the first embodiment of the present invention.

Figure 5 is a cross-sectional view of another embodiment connector constituting the present invention.

6 shows a process in which the tension member is coupled,

  (A) is a cross-sectional view of the first embodiment showing the state before the tension member is bonded,

  (B) is sectional drawing of 1st Example which showed the state in which the tension material is bonded.

7 shows a process of separating the tension member,

  (A) is a cross-sectional view of the first embodiment showing a state before the tension member is separated,

  (B) is sectional drawing of 1st Example which showed the state in which a tension material is isolate | separating.

8 is a perspective view of a sealing member constituting an anchor of the second embodiment of the present invention;

9 is a partial engagement cross-sectional view of the anchor body of the second embodiment of the present invention.

        ((Explanation of symbols for main part of drawing))

        21. Upper Body 22. Lower Body 23. Wedge Cone

        23A. Connector 24. Connector 24A. Upper part

        24B. Body 25. Support Plate 25A. Joint

        25B. Ju 26. Elastic 27. Sealing member

        27A. Tube 27B. Combined flange

        B. Coupling member E. Projection G. Concave groove

        G '. Groove G ". Coupling groove H, H3. Hollow

        H1. Upper Hollow H2. Lower Hollow J. Step

        P. Pipe W. Tension

The present invention is an anchor body embedded in the ground and a lower end on the anchor body in order to prevent the settlement of the ground or slope, etc. during various constructions related to civil engineering or construction, or to install a temporary temporary wall for the construction that extends upwardly from the ground In the anchor consisting of a tension member whose upper part is exposed through the temporary temporary wall after the bite and a fixing member for fixing the tension member applied to the temporary temporary wall, the tension member with the lower part is easily separated from the anchor body after completion of construction. The present invention relates to an anchor body for ground anchors that can be removed.

Excavation is essential for foundation work in various civil works and construction works. Temporary temporary walls are installed to prevent the sidewalls of the excavated walls from collapsing, and retaining walls may be installed on slopes generated during civil works such as roads. do.

Therefore, the construction of the temporary temporary walls during construction, to prevent the retaining wall collapsed by earth pressure, etc. after the civil construction, or to repair various civil structures already completed including bridges, etc. An anchor method, also called a nail nail method, may be mentioned.

The anchor method is to anchor the anchor body to the lower end of the tension member, such as rebar, steel wire, stranded wire, through the wall of the retaining wall, temporary temporary wall, etc. After the anchor body is embedded in the buried hole, the grouting process is performed in the anchor buried hole.

After the grouting process is completed, the upper end portion of the tension member, that is, the protruding end portion, is fixed to the outer surface of the wall as a fixing member by pulling the tension member from the outer wall of the wall and giving a proper tension force to the tension member.

Therefore, in the anchor construction method as described above, a small diameter concrete pile having a tension member as a core becomes a structure that is firmly planted in the anchor embedding hole. have.

Therefore, by anchoring the outer circumferential surface of the tension member with a synthetic resin pipe, the anchor member was prevented from contacting the tension member and the grouting mortar, and the anchor was developed to separate and remove the lower end portion of the tension member from the anchor body embedded in the ground after completion of the construction. Publication No. 2004-42975 discloses a "removable ground anchor."

As shown in FIG. 1, the "removable ground anchor" is a method of striking any one of seven steel wires constituting the steel wires when separating the steel wires as the tension member 10 bitten by the anchor body. The stranded wire can be separated from the wedge cone 80 of the anchor body.

That is, by striking a rigid steel wire of one bone, the disk 40 deformed on the stepped portion of the inner diameter of the head cap 20 in the state coupled to the outer peripheral surface of the closed cap 30, the disk 40 The wedgecon 80 and the closed cap 30 are moved together by the deformation of the wedgecon 80 portion holding the twisted wire is opened so that the entire strand can be separated.

However, in the structure as described above, the wedge cone 80 fixedly coupled to the closed cap 30 is supported by the disk 40 in the inner diameter portion of the head cap 20, the wedge against the closed cap 30 The cone 80 is almost impossible to flow, which can only flow within the separation range of the joint.

Therefore, the closed cap 30 and the wedge cone 80 are non-flowable structures with respect to the disk 40 penetrated by the closed cap 30, and thus the role of the spring 60 is almost absent. In the non-deformed state, since the wedge cone 80 is not moved, it is not easy to snap the tension member 10 to the open inner diameter of the wedge cone 80.

That is, when the tension member 10 is bitten by the anchor body in the assembled state without being assembled after the lower end portion of the tension member 10 is firmly bitten by the wedge cone 80 in the state where the anchor body is disassembled, the wedge cone 80 and the tension member. Because of the lack of the bonding force of (10), the tension member may be separated from the wedge cone, i.e., the anchor body, when the tension member is provided with a considerable tensile force after the anchor is installed.

In addition, when the strand is separated as a tension member, any one of the seven stiff wires constituting the strands is damaged, and it is difficult not only to strike a single stiff wire but also the length of the strand is longer. In this case, since the impact force applied to the upper end of the single steel wire is difficult to transmit to the lower end, the separation of the tension member may be more difficult.

The present invention was devised to solve all the problems of the anchor body used in the conventional removable ground anchor, it is easy to bite the tension member in the assembled anchor body, as well as the strand as a tension member after construction is completed The purpose of the present invention is to provide an anchor body that can separate the tension member more easily by not only reinforcing steel but also allowing the striking wire to strike the entire strand rather than the steel wire of the bone. have.

The above object of the present invention is achieved by a separation structure between the wedge cone bite of the tension member and the elastic body for controlling the movement of the wedge cone.

The ground anchor anchor body of the present invention is to be able to easily bite the tension member in the assembled state, as well as to easily separate the tension member after the completion of construction, the structural feature is because the wedge cone and the elastic body is combined in a laminated state have.

The anchor body of the present invention as described above,

An upper body having a hollow penetrating in the axial direction;

A lower body having a top end screwed to a lower end of the upper body and having an upwardly open recessed groove having a circular cross section having a stepped portion on an inner circumferential surface thereof;

A wedgecon inserted into the hollow of the upper body so that an upper portion of the upper body is movable up and down, and having an axial hollow;

An upper end portion inserted and coupled to a lower end of the wedge cone hollow, and a columnar connector inserted into the hollow of the lower body to move upward and downward;

A support plate coupled to the lower end of the connector;

It is composed of an elastic body and the like interposed between the bottom surface of the support plate and the bottom surface of the recess groove of the lower body, each look as follows.

The upper body serves to support the outer circumferential surface of the wedge cone which the tension member bites, and the hollow formed downward through the axial direction at the center of the upper surface of the upper body has an upper hollow with a constant inner diameter and a lower hollow at the lower end of the upper hollow. It is a structure consisting of a conical lower hollow that the inner diameter gradually increases toward the bottom.

The lower body is to serve to provide the upper and lower movement space of the wedge cone and the connector in the state that the upper end is screwed to the lower end of the upper body, the inner diameter of the upper body, the inner body is constant The upper hollow and the conical lower hollow and the inner diameter of which the inner diameter gradually increases toward the bottom and the inner diameter thereof are constant, but an inner space of an upward open type in which a recessed groove having a stepped portion formed on the inner circumferential surface is connected in the up and down directions.

The wedge cone has the shape of a hollow cone, but is divided into a plurality, that is, 2 to 5 along the axial direction, and the elastic connection member such as an O-ring is burnt in the groove formed on the outer peripheral surface of the lower end in contact with the cone. By being sexually coupled, the shape of the cone is maintained, and at the same time, the upper end is well-opened around the coupling of the lower end of the outer circumferential surface.

The connector serves to move the wedge cone up and down by the elastic force of the elastic body in a state of being fixedly coupled to the lower end of the inner circumferential surface of the wedge cone. At this time, the connector may be rotatable with respect to the wedge cone.

The support plate is moved up and down inside the recess groove of the lower body together with the wedge cone and the connector in the state coupled to the lower end of the connector, but is caught by the step of the inner circumferential surface of the recess groove. The maximum descent depth. That is, the support plate is movable up and down only in the space immediately above the stepped portion of the inner circumferential surface of the recessed groove of the lower body.

The elastic body serves to allow the wedge-con, the connecting portion and the support to elastically move up and down, and the hollow body, for example, the coil having an inner diameter, of a sufficient size into which the connector can be inserted, for example, a coil. It is preferable to use a spring.

The method of using the anchor body of the present invention configured as described above is as follows.

Conical assembled wedges by the connecting member, the coupling coupled to the hollow lower end of the wedge cone and the support plate coupled to the lower end of the connector, the upper and lower ends are in close contact with the bottom surface of the support plate and the bottom of the lower body recess groove, respectively The upper body and the lower body are located in the inner space of the combined body while being supported by the elastic force of the elastic body.

At this time, the outer peripheral surface of the wedge cone is in close contact with the inner peripheral surface of the conical lower hollow of the upper body.

When the tension member is pushed into the inner space of the assembly through the upper hollow of the upper body in the above state, the wedge cone caught on the lower end of the tension member descends and is spaced apart from the inner circumferential surface of the lower hollow to open the upper end of the wedge cone, When the lower end of the tension member is inserted into the hollow of the cone, when the external force applied to the tension member is removed, the wedge cone is raised by the elastic force of the elastic body and its outer peripheral surface is in close contact with the inner peripheral surface of the lower hollow.

At this time, the position of the wedge cone in which the tension member is inserted is lower than the initial position before the tension member is inserted, the wedge cone is lowered and then rises in the process of the tension member is inserted, but the degree of descending, the support plate is lower It does not descend below the stepped portion of the inner circumferential surface of the body recess groove.

Accordingly, when the tension member is pulled in the above state, the wedgecon is raised by the conical lower hollow inner circumferential surface of the lower body, and the outer circumferential surface is brought into close contact with the lower hollow inner circumferential surface. As a result, the tension member does not come out of the wedge cone.

In addition, when the tension member is to be separated from the wedge cone after completion of the construction, a sufficient impact is applied to the anchor body side from the upper end portion of the tension member so that the support plate is lowered below the stepped portion of the lower body inner circumferential surface.

In other words, when the support plate is lowered and is damaged or deformed by the stepped portion of the inner circumferential surface of the lower body, the upwardly elastic force of the elastic body does not act on the connector, and the connector coupled to the wedge cone is inserted into the inner diameter part of the elastic body. The lower end of the wedge cone is lowered with the open state, so the tension member can be easily separated.

The details of the purpose and technical constitution according to the present invention, including the effect thereof, will be clearly understood by the following description with reference to the drawings showing preferred embodiments of the present invention.

2 is an exploded perspective view of the anchor body according to one embodiment of the present invention, FIG. 3 is an exploded cross-sectional view of FIG.

As shown, the anchor body for the ground anchor of the present invention,

An upper body 21 formed with an upper hollow hole H1 having a constant inner diameter and a lower hollow hole H2 having an inner diameter gradually increasing as it descends from the lower end thereof and penetrating the center along an axial direction; ;

A lower body 22 having an upper end inner circumferential surface screwed to an outer circumferential surface of the lower end of the upper body 21, and having an upwardly open recessed groove G having a circular cross section having a stepped portion J formed therein;

The upper portion of the upper body 21 in the hollow (H) is inserted so that the upper portion, except for the lower portion can be moved up and down, is separated into a plurality in the axial direction but inserted into the ring-shaped groove (G ') formed along the outer peripheral surface of the lower end A wedge-cone 23 assembled in the shape of a cone without a vertex by the elastic connection member 23A, and having a hollow H3 having a coupling groove G ″ in the lower end inner circumferential surface thereof;

The flanged upper end portion 24A is inserted into and coupled to the lower end coupling groove G ″ of the hollow H3 inner circumferential surface of the wedge cone 23, and the lower end portion of the columnar body 24B extending downward from the center portion of the bottom surface of the upper portion 24A. A connector 24 which passes through the lower end of the hollow H3 of the wedge cone 23 and is positioned inside the recess groove G of the lower body 22;

A support plate 25 which is detachably coupled to the lower end of the connector 24 by a coupling member B such as a bolt, and is located directly on the inner circumferential surface step J of the recessed groove G of the lower body 22; ;

It consists of an elastic body 26 and the like interposed between the bottom surface of the support plate 25 and the bottom surface of the recess groove (G) of the lower body (22).

At this time, the connector 24, as shown in Figure 5, omission of the flange-like upper end (24A) consisting of only the columnar body (24B), the coupling groove (G ") is formed on the outer peripheral surface directly below the upper surface By doing so, while the outer peripheral surface of the upper end portion immediately above the coupling groove G ″ is inserted into the coupling groove G ″ of the connector 24, the inner peripheral surface of the lower portion immediately below the coupling groove G ″ of the connector 24 is coupled to the connector 24. Various modification structures are possible, such as being able to be inserted into the groove G ".

In addition, the wedge cone 23 and the connector 24 do not necessarily need to be rotatably coupled to each other. However, in order to rotatably engage the body 24B of the connector 24 to be manufactured in a cylindrical shape.

The anchor body of the present invention configured as described above, as shown in Figure 6, when the tension member (W) is inserted into the hollow (H) of the upper body 21, the tension member (W) in the upper end of the wedge cone (23) ), The tension member W and the wedge cone 23 descend together, and the inner diameter of the upper end of the wedge cone 23 is enlarged, and the tension member W is inserted into the enlarged hollow H3 of the wedge cone 23. do.

At this time, the support plate 25 is lowered, but is still in the state located directly on the inner circumferential surface (J) of the recess groove (G) of the lower body (22).

When the tension member W is removed in the state in which the tension member W is inserted into the hollow H3 of the wedge cone 23 as described above, the wedge cone 23 is upward by the elastic force of the elastic body 26. The inner circumferential surface of the wedge cone 23, which has been expanded and reduced as the outer circumferential surface thereof comes into close contact with the inner circumferential surface of the lower hollow H2 of the upper body 21, is reduced, whereby the outer circumferential surface of the tension member W is hollow of the wedge cone 23. (H) Closely fixed to the inner circumferential surface.

At this time, if a plurality of protrusions (E) protruding from the hollow (H) inner circumferential surface of the wedge cone 23 to increase the adhesion between the outer circumferential surface of the tension member (W) and the hollow (H) inner circumferential surface of the wedge cone (23) more. There is a number.

In addition, when the tension member (W) is to be separated from the anchor body after completion of construction, when the tension member (W) is pushed toward the anchor body, the wedge cone (23) retreats and its upper end is opened to be able to pull out the tension member (W). The same, but the tension member (W) can be separated because the wedgecon (23) advances together with the tension member (W) while drawing the tension member (W) and advancing together with the tension member (W) by the elastic force of the elastic body (26). none.

Therefore, in the case where the tension member W is to be separated, a sufficient blow is applied from the upper end portion of the tension member W to the lower end side of the wedge cone 23 so that the wedge cone 23 and the connector 24 are fully retracted. The edge of the support plate 25 coupled to the connector 24 is to be deformed or broken while strongly colliding with the step (J) of the inner peripheral surface of the lower body (22).

That is, by deforming or breaking the edge portion of the support plate 25 while colliding with the stepped portion J, the connector 24 positioned directly on the elastic body 26 is inserted into the inner diameter of the elastic body 26 and the wedge cone 23 is inserted therein. ) Is also fully retracted, and as a result, the upper end of the wedge cone 23 can be freely opened around the connecting member 23A at the lower end of the outer peripheral surface thereof, thereby easily separating the tension member W from the wedge cone 23. You can do it.

Therefore, in order to easily separate the tension member W, the support plate 25 must be easily deformed or damaged by an impact, and the support plate 25 has its outer circumference around the engaging portion 25A with the connector 24. A shape in which a plurality of flesh 25B extends radially is preferable, for example, a shape such as a cross.

That is, when a load is applied to the flesh 25B of the support plate 25 caught on the stepped portion J, the engaging portion 25A of the support plate 25 is connected with the connector 24 while the flesh 25B is broken or bent. It can be inserted into the inner diameter of the elastic body (26).

And, as shown in Figure 7, in practice, the outer peripheral surface of the tension member (W) coupled to the anchor body is a structure wrapped with a synthetic resin pipe (P), through the upper end of the hollow hole (H) of the upper body 21 When the grouting mortar is introduced and cured into the inside, the wedge cone 23, the connector 24, the support plate 25, and the elastic body 26 may become impossible to flow, and as a result, the tension member W may not be separated. It may be.

Therefore, as shown in FIGS. 8 and 9, the tube body 27A and the tube body 27A in which the outer peripheral surface is in close contact with the inner peripheral surface of the lower end of the pipe after being inserted into the lower end of the synthetic resin pipe P surrounding the outer peripheral surface of the tension member W. The sealing member 27 is formed of a coupling flange 27B extending outwardly in the horizontal direction from the lower end of the sealing member 27, and the sealing member 27 is formed on the inner circumferential surface of the upper end of the upper hollow H1 provided in the upper body 21. It is also preferable to form a screw thread to which the coupling flange 27B is screwed.

As described above, the ground anchor anchor body of the present invention is simpler in structure than the conventional anchor body, and thus the manufacturing cost is reduced, and various tension members such as stranded wire or reinforcing bars can be used, as well as the entire tension member. Alternatively, there is an advantage in that the tensile material can be separated in a careful manner even by partial blow.

Claims (5)

delete delete In the anchor body coupled to the wedge cone for biting the tension member in the inner space of the body detachably coupled, the upper and lower movable, An upper body 21 through which a hollow H is penetrated in the center along the axial direction; A lower body 22 having an upper end inner circumferential surface screwed to an outer circumferential surface of a lower end of the upper body 21, and having an upwardly open recessed groove G having a circular cross section having a stepped portion J; The upper portion of the upper body 21 is inserted in such a manner that the upper portion except for the lower portion is movable up and down in the hollow H, and is separated into a plurality in the axial direction but has no vertex by the ring-shaped elastic connecting member 23A coupled to the outer peripheral surface of the lower portion. Wedge cone 23 is assembled in a conical shape, the hollow (H3) having a coupling groove (G ") on the inner peripheral surface of the lower end; and the upper end is inserted and coupled to the coupling groove (G"), the lower end of the hollow (H3) A rod-shaped connector 24 extending downwardly through the recess groove G; A support plate 25 detachably coupled to a lower end of the connector 24 and positioned directly on the inner circumferential surface of the recess groove G; It includes an elastic body 26 is interposed between the bottom surface of the support plate 25 and the bottom surface of the recess groove (G), As one end of the elastic body 26 elastically supports the bottom surface of the support plate 25, the support plate 25 is spaced apart from the step portion J of the lower body 22 by a predetermined distance. The hollow H of the upper body 21 is composed of an upper hollow (H1) of a constant inner diameter, and a lower hollow (H2) extending from the lower end of the upper hollow (H1) and gradually increasing the inner diameter as it descends, The anchor body for a ground anchor, characterized in that a plurality of protrusions (E) are formed on the inner circumferential surface of the hollow (H3) of the wedge cone (23). The method of claim 3, wherein The support plate 25, An anchor body for a ground anchor, comprising a coupling part (25A) coupled to the lower end of the connector (24) and a plurality of flesh (25B) extending radially from the outer periphery of the coupling part (25A). The method of claim 3, wherein Ground anchor anchor body, characterized in that the thread formed on the inner peripheral surface of the upper hollow (H1) of the upper body (21).

Images