KR101128048B1 - Anchor body for a permanent ground anchor - Google Patents

Abstract

The present invention relates to an anchor for a ground anchor,

The cap 600 is coupled to the rear side of the body 100 through which the tapered hole 110 is formed, and the tape 600 is inserted into the taper hole 110 so as to bite the tension member 700. The wedge cone 200 is assembled into a conical shape, and a spring 400 is provided to impart a force to push the wedge cone 210 back to its original position from the rear of the wedge cone 210 to support the cap 600. In the anchor for the ground anchor is formed, the coupling groove 210 is formed in the rear inner side of the wedge cone 210, the support 300 is coupled to the coupling groove 210 of the spring 400 Supporting the tip, the locking ring 500 is formed on the outer peripheral surface is provided with a locking projection 510 is coupled to wrap around the support 300, while the locking projection 510 to limit the backward of the locking ring 500 Locking groove 120 is coupled to limit the backward of the wedge cone 200 is configured Is characterized in that,

Ground anchor anchor for convenient operation that combines tension members and secures the reliability of the device when it is installed because the coupling state is not disassembled even if it is hardly knocked when external force is applied to the tension member or when it is buried in the anchor hole after completion of the coupling. It is about.

Anchors, ground anchors, slopes, tension members.

Description

Anchor body for a permanent ground anchor

The present invention relates to an anchor body for a ground anchor, and more particularly, it is possible to easily combine the tension member, and when the bonded tension member is applied to a certain degree of impact or force, the absorbed state is coupled to the state. Although not separated, it relates to a convenient ground anchor anchor so that it can be easily separated when a certain degree of impact or force is applied.

In general, there are two anchor bodies applied to the anchoring method: temporary anchors and permanent anchors. A hypothetical anchor refers to a period of about 12 months to 24 months of use after being buried in the ground, and a permanent anchor refers to an anchor that is buried in the ground for more than 24 months or permanently.

Excavation is essential for foundation work in various civil works and construction works, and temporary temporary walls are installed to prevent the side walls of the excavated site from collapsing, and retaining walls are installed on the slopes generated during civil works such as roads. do. Therefore, the above-described anchor construction method is widely used to prevent temporary temporary walls from collapsing during construction, to prevent retaining walls from collapsing due to earth pressure, or to repair various civil structures already completed including bridges. A representative method is an anchor method, also referred to as a soak nail method (soil nail method).

In the anchor method, the anchor is coupled to the lower end of the tension member such as reinforcing steel, steel wire, stranded wire, and the like through the wall such as the retaining wall or temporary temporary wall to drill the anchor buried hole into the ground, and the upper end of the tension member protrudes to the outer surface of the wall. After the anchor body is embedded in the buried hole, grouting treatment 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.

In the anchor construction method as described above, a concrete pile having a tensile material as a core becomes a structure that is firmly planted in the anchor buried hole, and thus, there is a problem that the work of removing and removing the protruding tensile material after completion of construction is very troublesome. 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. Patent Application Publication No. 10-2004-0042975 "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 single rigid steel wire, the disk 40 deformed by the edge portion of the inner cap of the head cap 20 is deformed while being coupled to the outer circumferential surface of the closed cap 30, and the disk ( As a result of the deformation of 40, the wedge cone 80 and the closed cap 30 move together, and a portion of the wedge cone 80 holding the strand is opened to separate the entire strand.

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.

In order to solve the above problems, Korean Utility Model Publication No. 20-2008-0001018 "ground anchor anchor body" has been proposed. The anchor for the ground anchor is an application filed and registered by the present applicant, as shown in Figures 2 and 3, the wedgecon for biting the tension member in the inner space of the body detachably coupled as shown in Figure 2 can move up and down An anchor body coupled to each other, comprising: an upper body (21) formed with a hollow (H) penetrating through a center thereof in an 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 upward open concave groove G having a circular cross section provided with a stepped portion J; The upper portion of the upper body 21 is inserted in the hollow H so that the upper portion except for the lower portion is movable up and down, 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 comprises an elastic body 26 which is interposed between the bottom surface of the support plate 25 and the bottom surface of the recess groove (G), because the structure is simpler than the conventional anchor body, the manufacturing cost is reduced, Various tension members such as reinforcing bars can be used, and the tension members can be separated by whole or partial impact of the tension members.

In such a configuration, if the elastic member is strongly pushed or hit, the elastic member 26 contracts and the edge portion of the support plate 25 collides with the stepped portion J. As a result, the support plate 25 is deformed or broken. As the connector 24 and the support plate 25 are inserted into the inner diameter of the elastic body 26, the wedge cone 23 is also completely retracted, so that the wedge cone 23 can be freely opened to separate the tension member. It was a composition that made it possible.

However, in the process of constructing the anchor body, a blow is often applied to the tension member in order to deeply embed the anchor body. At this time, the support plate 25 is broken and the tension member is separated from the wedge cone 23. In other words, even when the anchoring body is not separated from the tension member, there is a problem that unwanted separation occurs due to the structural characteristics as described above.

The present invention is to solve the above problems, to facilitate the coupling of the tension member, and when the combined tension member is applied a certain degree of impact or force absorbs the impact and the combined state is separated The purpose of the present invention is to obtain an anchor body for a ground anchor that can be smoothly installed during construction.

According to the invention,

Ground anchor anchor for convenient operation that combines tension members and secures the reliability of the device when it is installed because the coupling state is not disassembled even if it is hardly knocked when external force is applied to the tension member or when it is buried in the anchor hole after completion of the coupling. Can be obtained.

The present invention will be described in detail with reference to FIGS. 4 to 10.

Figure 4 is an exploded perspective view of the anchor anchor body for ground according to the present invention, Figure 5 is an exploded cross-sectional view of the ground anchor anchor body according to the present invention, Figure 6 is a cross-sectional view of the anchor anchor body for ground anchor according to the present invention, 7 to 10 is an operation showing the action of the anchor body for a ground anchor according to the present invention.

As shown in the present invention, the interior of the body 100 through which the tapered hole 110 is formed, and the cap 600 coupled to the rear side (right side in the drawing, hereinafter same) of the body 100, and Wedge cone 200 is inserted into the taper hole 110 and asks the tension member 700 in the axial direction to be separated into a plurality of conical wedge cones 200 and the rear of the wedge cone 210 to the cap 600. The rear end is supported and is applied to the anchor anchor for the ground anchor having a spring 400 to give a force to push back the wedge cone 210 to its original position.

A coupling groove 210 is formed in the rear inner side of the wedge cone 210, and the support 300 is coupled to the coupling groove 210 so as not to be separated. A jaw is formed along the outer circumferential surface at the front end of the support 300 (the same as below, the same below), and a groove is formed in the coupling groove 210 so that the support 300 is not separated. Will be.

When the support 300 is coupled, the support 300 is inserted into the coupling groove 210 in a state where the wedge cone 210 is separated into a plurality of parts, and then the elastic ring 220 is coupled to the support 300 to be separated. When the wedge cones 210 are assembled to each other, the support 300 is coupled to the coupling groove 210 so as not to fall out. Here, a groove is formed on the outer circumferential surface of the rear end of the wedge cone 210 so that the elastic ring 220 may be fastened.

The support 300 coupled to the wedge cone 210 as described above supports the tip of the spring 400 to push the wedge cone 210. The flange 310 is formed in the middle portion of the outer circumferential surface of the support 300, the flange 310 is configured to support the tip of the spring 400. Accordingly, the force that the wedge cone 210 is pushed toward the tapered hole 110 is applied to the wedge cone 210.

On the other hand, in the present invention is provided with a locking ring 500 formed with a locking projection 510 on the outer circumferential surface is coupled to surround the support (300). The locking protrusion 510 is coupled to the locking groove 120 to limit the backward of the locking ring 500 and thereby limit the backward of the wedge cone 200.

In more detail, the locking protrusion 510 is formed on the outer circumferential surface of the front end of the locking ring 500, and the locking groove 120 is formed behind the taper hole 110, and the locking protrusion 510 is formed. The back of the wedge cone 200 is limited by being fitted into the locking groove 120. At this time, the locking groove 120 is formed to have a predetermined width of about 2 ~ 7mm so that the locking projection 510 is configured to be able to move forward and backward to some extent in the locking groove 120. The width of the locking groove 120 may be formed outside the range as necessary.

The locking ring 500 is cut in the longitudinal direction. Therefore, the diameter is configured to increase elastically and is easy to assemble and disassemble, it is configured to be more easily coupled when the locking projection 510 is coupled to the locking groove 120.

A locking jaw 520 is formed inside the lock ring 500. The engaging jaw 520 is the edge of the flange 310 formed on the support 300 is caught, when the locking ring 500 is coupled to the support 300, the support 300 is separated from the front It plays a role to prevent it from becoming.

Here, the locking step 520 may be formed in multiple stages. An inclined surface 522 inclined upward toward a rear side and a vertical surface 524 for preventing the front departure of the flange 310 formed on the support 300 form one locking jaw 520, and the inclined surface 522 The vertical surface 524 is composed of a multi-stage by being formed alternately in succession.

As the latching jaw 520 is configured in multiple stages with the inclined surface 522, when the flange 310 is caught by the latching jaw 520, an external force greater than or equal to a threshold is applied from the front to the rear of the flange 310. ) Proceeds rearwardly beyond the locking step 520 formed in the multi-stage.

As described above, the outer circumferential surface of the flange 310 formed on the support 300 may be inclined toward the center from the front end to the rear end in order to facilitate the rear beyond the inclined surface 522.

As the flange 310 is caught by the catching jaw 520 at the rear side, the spring 400 is further compressed. When the position of the catching jaw 520 where the flange 310 is caught is adjusted, the degree of compression of the spring 400 is adjusted. It can be adjusted.

Hereinafter, the operation of the anchor for a ground anchor according to the present invention described above will be described with reference to FIGS.

 In the anchor body for the ground anchor according to the present invention, the tension member 700 is coupled to the end. The anchor body is coupled to the tension member 700 by being bitten by the wedge cone 200 fitted in the taper hole 110 after the tension member 700 penetrates the body 100.

Looking more closely at the process of combining,

First, the tension member 700 penetrates toward the rear from the front of the body 100. At this time, when the end of the tension member 700 is continuously applied to the external force at the moment of contact with the front of the wedge cone 200, the wedge cone 200 is pushed backward in the tapered hole 110 to retreat and the spring 400 Is contracted while being supported by the cap 600.

When the wedge cone 200 is retracted as described above, the tension member 700 is fitted while the wedge cone 200 is separated into a plurality of naturally open. Since the end of the tension member 700 is in contact with the support 300 when the force continues to be applied, the spring 400 is stopped as far as possible to stop the progress.

Thereafter, when the force pushing the tension member 700 is removed, the spring 400 is extended to push the support 300. As a result, the wedge cone 200 is pushed back into the tapered hole 110. As described above, the wedge cone 200 pushed by the spring 400 asks the tension member 700. At this time, when the tension member 700 is strongly pulled, the wedge cone 200 causes friction with the tension member 700 and is pulled together to enter the taper hole 110 more deeply. Therefore, the wedge cone 200 is to ask the tension member 700 with a stronger force is that the tension member 700 will not fall out.

As described above, when the tension member 700 is pulled until it is strongly bitten by the wedge cone 200, the locking ring 500 surrounding the support 300 is also pulled together with the wedge cone 200. At this time, the locking protrusion 510 formed on the outer circumferential surface of the locking ring 500 is caught while entering the locking groove 120 formed at the rear of the taper ball 110, thereby causing a force to raise the tension member again. Even if the wedge cone 200 is not pushed back. In other words, it is to maintain the state that is strongly buried the tension member (700).

Meanwhile, in the process of constructing the ground anchor, through the wall of the retaining wall or temporary temporary wall, the anchor embedding hole is drilled into the ground, and the anchor body is embedded in the anchor embedding hole so that the upper end of the tension member 700 protrudes to the outer surface of the wall. do. At this time, the anchor body is often embedded in the anchor buried hole while tapping the upper end of the tension member 700 protruding to the outside with a strong force. Thus, even when the tension member 700 is knocked, the locking protrusion 510 is tapered hole ( 110) The tension member 700 does not fall out of the wedge cone 200 because it is locked by the locking groove 120 formed at the rear, and the impact applied when the locking groove 120 is formed at a predetermined width. As the lock ring 500 moves forward and backward, the spring 400 is absorbed while contracting or extending.

According to the anchor member for the ground anchor according to the present invention as described above is convenient to combine the tension member 700, and after the coupling is completed when the external force is applied to the tension member 700 or strongly buried in the anchor buried hole Even if the coupling state is not dismantled to ensure the reliability of the device.

1 to 3 is an exemplary view of an anchor body for a conventional ground anchor,

4 is an exploded perspective view of the anchor body for a ground anchor according to the present invention;

5 is an exploded cross-sectional view of the anchor body for a ground anchor according to the present invention;

Figure 6 is a cross-sectional view of the coupling state of the anchor anchor for ground according to the present invention,

7 to 10 is an operation showing the action of the anchor body for a ground anchor according to the present invention.

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

100: body, 110: taper ball,

200: wedge cone, 210: coupling groove,

300: support, 310: flange,

400: spring, 500: locking ring,

510: locking projection, 520: locking jaw,

522: inclined plane, 524: vertical plane,

600: cap; 700: tension member.

Claims (7)

The cap 600 is coupled to the rear side of the body 100 through which the tapered hole 110 is formed, and the tape 600 is inserted into the taper hole 110 so as to bite the tension member 700. Wedge cone 200 is assembled in a conical shape, the spring 400 is provided to give a force to return to the original position by pushing the wedge cone 200 from the rear of the wedge cone 200 is supported by the cap 600 In the anchor body for ground anchors to be formed, A coupling groove 210 is formed in the rear inner side of the wedge cone 200, and the support 300 is coupled to the coupling groove 210 to support the tip of the spring 400. A locking ring 500 having a locking protrusion 510 formed on an outer circumferential surface thereof is coupled to surround the support 300, while the locking protrusion 510 restricts the backward of the locking ring 500. By being coupled to limit the backward of the wedge cone 200, The locking groove 120 has a predetermined width, the anchoring body for a ground anchor, characterized in that the locking projection (510) to be able to move forward and backward in the locking groove (120). The method according to claim 1, A flange 310 is formed along the outer circumferential surface of the support 300, and a locking jaw 520 is formed inside the lock ring 500. The anchor 310 for the ground anchor, characterized in that the locking ring 500 is coupled to the support 300 by engaging the flange 310 to the locking jaw (520). The method according to claim 1, The locking groove 120 is a ground anchor anchor body, characterized in that formed on the rear of the tapered hole (110). The method according to claim 1, The locking ring 500 is cut in the longitudinal direction and the anchor body for ground anchors, characterized in that the diameter is configured to increase elastically. delete The method of claim 2, The locking jaw 520 formed inside the locking ring 500 is formed in multiple stages, and the outer peripheral surface of the flange 310 formed on the support 300 is inclined toward the center from the front end to the rear end so as to be formed in the multiple stages. Ground anchor anchor body, characterized in that the configuration is to be able to proceed beyond the jaw (520). The method according to claim 6, The latching jaw 520 has a plurality of stages formed by successive formation of the inclined surface inclined upward toward the rear and the vertical surface 524 that prevents the front departure of the flange 310 formed on the support 300. Anchor body for ground anchors, characterized in that 310 is allowed to proceed only rearward from the engaging jaw (520).

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