KR101700794B1 - Dual-direction Resisting Anchor - Google Patents

Abstract

The present invention relates to a bidirectional resistance anchor which, more specifically, can apply higher anchoring force to the same ground and can be used for the ground with low strength by reducing the maximum load imposed on a grout as an anchoring place is divided into multiple anchoring places and the anchoring force is distributed to each divided anchoring place and, consequently, focused load is reduced. The bidirectional resistance anchor comprises: a tension body which has a joining protrusion and a compression grip insertion groove which are formed to be symmetrical and has a support unit having a steel strand insertion hole formed on a rear side while the joining protrusion is formed on a front side, protrudes toward the outside, and has an insertion hole for allowing a screw rebar to be inserted therein and the compression grip insertion groove are formed on both lateral sides; a tension-type anchor body which is made of the screw rebar inserted and installed on the joining body of the tension body; a compression body which has sheath pipe insertion holes which penetrate the inside and are formed to be symmetrical and has a compression-type protrusion which is formed on a rear side and protrudes toward the outside to increase attachment force; a compression-type anchor body which fixates the steel wire covered with the sheath pipe with a compression grip by placing the steel wire in the compression grip insertion groove of the tension body; a load transfer body which is joined between the tension-type anchor body and the compression-type anchor body, has elasticity, is in a circular shape, and allow the steel wire to be inserted therein; and an anchor body case which is installed on the outside of the tension body and the load transfer body, has a hole which is formed on a front side to allow the joining protrusion to be inserted therein, has inclined sides on both lateral sides of the hole, and has an insertion space therein.

Description

Dual-direction Resisting Anchor < RTI ID = 0.0 >

The present invention relates to a bidirectional resistance anchor, and more particularly, to a bidirectional resistance anchor which is capable of reducing the maximum load acting on the grout by dividing the anchorage force into a plurality of divided anchorage forces, A larger anchor force can be applied to the ground and it can be used for low strength ground.

In general, the ground anchor body is used to stabilize the structure from excessive stresses, deformations, displacements, etc. occurring in the ground by fixing a high-strength tensile material such as a PC strand or the like on both sides of the structure and a ground by giving a prestress It is construction material.

The ground anchor method using the anchor body described above introduces a tensile force to the high strength steel to prevent the deformation and the breakage of the wall which occurs during the earthquake for the construction of the structure in the civil engineering and the building field and the stability of the ground through the elastic force of the steel It is used to secure the foundation of the retained wall, slope reinforcement of road and slope slope, reinforcement of the basement of the transmission tower, and buoyancy prevention of the underground structure.

The development of the ground anchor was mainly focused on the long anchor, which is friction, but the development of the compression anchor (load concentrated type, load distribution type) is increasing through various studies according to the change of the market situation.

 Compression type anchors are installed with inner lower body so that compressive force can be applied to the grout body at the tip end of the tapped hole, and further research and development have been made since the anchor can be removed by separating the inner lower body and the stranded wire.

The compression anchor method has been developed to compensate for tensile cracks and corrosion problems, which are disadvantages of the tensile anchor method, and has been widely applied for permanent and temporary use. Compared with tensile type anchor method, the load reduction by the clip is small, but high strength grout should be used. On the other hand, relatively weak ground can not secure the anchor force enough to stabilize the ground.

Since the tensile and compressive anchors are concentrated load type in which the anchor force is concentrated in some sections during tension, when the frictional resistance between the ground and the grout is smaller than the anchor force, the grout is destroyed due to the load transfer.

In order to compensate for the disadvantages of the tensile type anchor and the compression type anchor, research and development of a load anchoring anchor have been actively carried out in recent years. In particular, a load anchoring anchor has been widely used It has a significant market share. In addition, the load-anchored tensile anchors have already been developed in the UK and Japan. However, they have not been very interested in the actual use of the anchors.

The load-anchoring anchors are distributed in various parts of the anchor body, so they have a small impact on the grout strength and can secure the anchorage force for the ground stabilization even in relatively weak ground. In general, Can be demonstrated.

The load-dissipating anchor method with the above characteristics should not cause extreme load concentration in the anchorage ground and grout. It should use PE coated steel strand that does not cause restraint of free part. It should be used with an allowable anchor force To be easily applied.

However, in the case of load-anchored anchors, it is difficult to control the allowable anchor force depending on the different ground conditions because the stranded wire is fixed to the inner fixture, and the length of the free field and the settlement length is different for each strand, There is a problem in construction such as an anchor tension and a step-by-step tension in an anchor, and an artisan is inevitably required in anchor construction and tension.

Also, due to the binding force of the ground, the applicability of the compressive load anchors and tensile load anchors is different and there is a problem in designing.

Korean Patent Registration No. 10-1303492 (2013.08.28.)

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above problems and it is an object of the present invention to provide a double anchor resisting anchor which is combined with a compression type anchor body and a tension type anchor body, The present invention provides a bidirectional resistance anchor to which a larger anchor force is applied.

According to an aspect of the present invention, there is provided a connector comprising: a coupling protrusion protruding outward from a front surface thereof, the coupling protrusion being formed with an insertion hole for inserting a screw reinforcement therein; a compression grip insertion groove formed symmetrically on both sides of the coupling protrusion; A tensile anchor body made of a screw reinforcement inserted into the engaging projection of the tensile body and a sheath tube insertion hole penetrating the inside of the tensile anchor body are formed symmetrically with each other, And a compression anchor body for fixing a stranded wire coated with the sheath tube to a compression grip insertion groove of a tensile body and fixing the shear pipe with a compression grip; and an elastic anchor body which is fastened between the tension anchor body and the compression anchor body, A load transmission body having a hollow cylindrical tube and a stranded wire inserted therein; Forming a hole in which the coupling protrusion is inserted in the front and an inclined surface is formed on both sides of the hole, it characterized in that the anchor body case having an insertion space therein is fastened.

The present invention has the following effects.

First, it can be applied to low strength ground by reducing the maximum load acting on the grout due to the dispersed resistance between the tension part and the compression part, and it is possible to apply a larger anchor force to the same ground than in the past.

Secondly, it is effective to secure the safety of the grout by increasing the thickness of the fixing portion grout due to the reduction of the size of the anchor body.

Third, it prevents corrosion of the anchor body through the waterproof treatment and prevents the eccentricity of the anchor head by applying the symmetrical structure.

Fourth, there is an effect that additional load distribution can be applied using a plurality of anchor bodies.

1 is a perspective view showing the entire configuration of the present invention;
2 is a cross-sectional perspective view showing the internal structure of the present invention;
Fig. 3 is a perspective view showing the construction of the pull-
4 is a perspective view showing the structure of the compression body of the present invention
Fig. 5 is a perspective view showing a structure of a load-
6 is a perspective view showing the configuration of the anchor body case of the present invention
Fig. 7 is a perspective view showing a combined state of the present invention
8 is a cross-sectional view showing the operating state of the present invention
9 to 10 are use state diagrams showing the use state of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an overall configuration of the present invention. FIG. 2 is a sectional perspective view showing an internal configuration of the present invention, and FIG. 3 and the following are drawings showing constituent parts of the present invention. And Fig.

In the drawings, reference numeral 100 denotes the bidirectional resistance anchor of the present invention.

1 and 2, the bidirectional resistance anchor 100 includes a tensile type anchor body 130 formed of a threaded reinforcing bar 120 fixed to the front of a tensile body 110, A compression anchor body 160 having a sheath tube insertion hole 141 and a compression protrusion 142 for inserting the strand 160 is provided on both sides of the tension body 110. [ A load transmission body 170 provided between the tension body 110 and the compression body 140 and an anchor body case 180 provided with an outer surface of the tension body 110 and the load transmission body 170 .

The tensile type anchor body 130 includes a tensile body 110 and a threaded reinforcement 120 which is fastened to the tensile body 110.

3, the tensile body 110 is formed with a coupling protrusion 112 protruding outward from the center of the front surface and having an insertion hole 111 for inserting a threaded reinforcing bar 120 therein, Are formed symmetrically with respect to each other.

And a support portion 115 having an insertion hole 114 through which the strand 150 is inserted in the center is formed symmetrically with respect to the rear surface.

The screw reinforcement 120 is inserted into the insertion hole 111 of the engaging projection 112 and is screwed into the insertion groove 111a whose end is extended.

The compression anchor body 160 is composed of a compression body 140 and a strand 150 which is fastened to the tension body 110 and has a compression grip 151 at its end.

As shown in FIG. 4, the compression body 140 has symmetrical sheath tube insertion holes 141 penetrating therethrough, and a compression protrusion 142 protruding outward to increase the adhesive force is formed on the rear surface of the compression body 140 .

The strand 150 is covered with a sheath tube 145, and a pressing grip 151 is fixed to the end of the strand.

The sheath tube 145 is inserted into the sheath tube insertion hole 141 of the compression body 140 and the stranded wire 150 passes through the insertion hole 114 of the pulling body 110, So that it is fixed by the pressing grip 151 and does not come off from the pulling body 110.

As shown in FIG. 5, the load conveying body 170 is a circular tube having elasticity and a predetermined length, and a strand 150 is inserted therein. The tip end 171 of the unloading body 170 And the rear end 172 is positioned on the front surface of the compression body 140. [ That is, it is installed in a space between the tension body 110 and the compression body 140.

6, the anchor body case 180 is made of a plastic material. The anchor body case 180 has an insertion space 181 formed therein, a rear surface thereof, and a circular hole (not shown) 182 formed on both sides of the front surface, and an inclined surface 183 is formed on both sides of the front surface.

The combined state of the present invention as described above will now be described with reference to FIGS. 7 and 8. FIG.

First, a threaded reinforcing bar 120 having a predetermined length is inserted into the engaging projection 112 of the pulling body 110 to form the pulling type anchor body 130.

Then, the front end of the strand 150 coated with the sheath tube 145 is inserted into the sheath tube insertion hole 141 of the compression body 140 and discharged to the outside, and then the load carrier 170 is inserted again.

The tip of the strand 150 in which the compression body 140 and the load transmission body 170 are fastened is inserted into the two insertion holes 114 formed in the support portion 115 of the pulling body 110, As shown in FIG.

In this state, the front hole 182 of the anchor body case 180 is inserted into the engaging projection 112 of the pulling body 110 to cover the pulling body 110, the pressing grip 151 and the load carrying body 170 And an end thereof is fixed to the tip of the compression body (140).

The grout is injected to the outside of the anchor body case 180 so that the operation of the internal anchor bodies 130 and 160 of the anchor body case 180 is not affected at all.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

First, a perforation hole (1) is formed in a cut slope and a bi-directional resistance anchor (100) is inserted into the perforation hole (1).

At this time, the tensile type anchor body 130 and the compression type anchor body 160 are located within the fusing long section, and the strand 150 is installed within the free long section and is exposed to the outside of the perforation hole 1.

When the grout is injected into the perforation hole 1 in this state, the compressive protrusion 141 of the compression body 140 from the screw reinforcement 120 of the tension anchor body 130 positioned at the tip of the perforation hole 1 Lt; / RTI >

The anchor body case 180 blocks the introduction of the grout into the case, so that the anchor bodies 130 and 160 operate without interfering with the grout.

When the strand 150 is stretched after the curing of the grout is completed, the jacking force of the strand 150, which is protected by the sheath pipe 145 and the load transmitting body 170, P is transmitted to the pressing grip 151 provided in the engaging groove 113 of the pull body 110 and the load transferred to the two pressing grips 151 is transmitted to the load carrying body 170 having elasticity, 170 are subjected to a load.

The compression protrusion 142 of the compression body 140 is supported by the grout g so that the compression anchor body 160 moves in the direction of the arrow.

The load transmitting body 170 is reduced in elasticity due to the load transmitted to the pressing grip 151 as described above and moves the threaded reinforcing bar 120 fastened to the pulling body 110 in the direction of the arrow.

The bidirectional resistance anchor 100 according to the present invention can be used for a low strength ground by reducing the maximum load acting on the grout due to the dispersed resistance between the tension portion and the compression portion, and applying a larger anchor force .

 9, when the bidirectional resistance anchor 100 is installed inside the perforation hole, the tension force P applied to the strand 150 is uniformly distributed at 1/2, Respectively.

In addition, as shown in FIG. 10, when two bidirectional resistance anchors 100 are installed, the tensile force P applied to the strand 150 is uniformly dispersed at 1/4, so that the stress acting on the grout Due to the reduction of the maximum load, it is possible to apply an anchor force larger than usual for the same ground.

100: Bidirectional resistance anchor
110: Tensile body 120: Screw reinforcement
130: tensile anchor body 140: compression body
141: Sheath tube insertion hole 142: Compression projection
150: Strand 151: Crimp grip
160: Compression type anchor body 170: Load carrier
180: Anchor body case

Claims (2)

A pulling body protruding outward from the front and having a coupling protrusion formed with an insertion hole for inserting a screw reinforcement therein and a pressing grip insertion groove formed symmetrically on both sides of the coupling protrusion, A tension-type anchor body made of a threaded reinforcing bar,
A compression body having a compression projection protruding to the outside and a strand wire coated with a sheath tube are positioned in a compression grip insertion groove of a tensile body to form a compression grip, A compression type anchor body which fixes the anchor body,
A load carrying body, which is a circular tube having elasticity, which is fastened between the tension anchor body and the compression anchor body and into which a strand is inserted,
And an anchor body case having an insertion space formed therein is fastened to an outer surface of the tensile body and the load transmitting body, wherein the anchor body case is formed with a hole through which a coupling protrusion is inserted, . delete

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