KR101471487B1 - multipurpose load dispersion style ground anchor assembly - Google Patents

Abstract

The present invention relates to a multipurpose ground anchor of a load dispersion type, including a hollow waterproof cap (110); a head coupler (120) engaged to a lower portion of the waterproof cap (110) and formed with a tapered hole (121) in a longitudinal direction through which a PC steel wire (10) passes; a wedge (130) inserted in the tapered hole (121) of the head coupler (120) to fix the PC steel wire (10); a tubular guide (140) installed in the waterproof cap (110) and formed with one or more slide groove (141); a body (150) installed in the guide (140) and formed with a slide boss (151) inserted in the slide groove (141), and a key groove (152) formed in the lower center which is coupled to an upper end of the PC steel wire (10) by key engagement, the body having a wedge (130) at a lower portion thereof; a pressing spring (160) resiliently pressing the body (150) downward; and a lower member (170) engaged to the head coupler (120) at a lower portion thereof, the PC steel wire (10) penetrating the lower member. Since the load is dispensed to several portions of a tension member, the sufficient anchor force is secured under the soft ground to effectively obtain a high load. The tension member, such as PC steel wire, can be easily detached and removed from the anchor, and the stable engaging state can be maintained when the anchor is moved or the external impact is applied thereto on the site, thereby improving the reliability of the product.

Description

A multipurpose load distribution type ground anchor assembly

The present invention relates to a multipurpose load distribution type ground anchor body, and more particularly, it relates to an anchor body having a sufficient anchor force by allowing a load to be dispersed in various portions of a tensile material, thereby obtaining a high load efficiently, To a multi-purpose load-dispersed ground anchor body for easily separating and removing tensile materials such as bonded PC stranded wires.

In general, the anchor method is used as an anchor force corresponding to an external force such as earth pressure, wind pressure, water pressure, and seismic force generated in construction or is used for stress reinforcement of a structure. This is mainly used for slope protection, retaining wall, Anchor, and positive anchor of positive pressure. Nowadays, it is used in high tower and bridge foundation where over-load acts due to the development of anchor design and construction technology, and it is applied in all fields such as plant, dam, and tunnel.

The ground anchor applied to the anchor method is inserted into holes drilled in the slope to stabilize the slope, so that high-tensile tensile materials such as PC strands are fixed on both sides of the structure and ground, Is a construction material for stabilizing a structure from excessive stress, deformation, displacement, and the like.

In addition, the ground anchors can be classified into tensile anchors, compression anchors, tensile anchors, and load anchoring anchors that distribute loads in compression anchors depending on the supporting method of the ground.

The tensile anchor method is a method of supporting the ground with friction between the ground and the grout by inserting a tensile material into the perforated ground, filling the grout, and applying a tensile force to the tensile material.

This tensile anchor method has a large load reduction because cracks due to tension applied to the tensile material in the grout and creep due to load concentration cause progressive fracture phenomenon.

The compression anchor method is a method in which a PC strand coated with polyethylene (PE) is constrained to a separate fixture to generate compression force in the grout.

When a tensile force is applied to the fixing body through the tensile material, the fixing anchor compresses the grout, so that the reduction of the load due to creep is small as compared with the tensile anchor method, but the high strength of the grout must be used A desired anchor force can not be secured in a relatively weak ground.

The load-anchoring anchor method overcomes the problems of the tensile anchor method and the load-concentrated anchor method, and is a method in which tensile anchors are dispersed in various portions.

This load-dissipating anchor technique should not cause extreme load concentration in the anchorage and grout, and it should be easy to apply the allowable anchor force according to the ground conditions.

 Meanwhile, in such an anchor method, a tensile material having a high tensile strength is inserted into the perforation hole together with an inner fixing agent and an inner lower body, and is then injected into a grouting material such as concrete to firmly fix the material. Then, a load is applied to the free end of the tensile material, It is possible to secure a strong fixation force by securing it to zero and to securely support the structure such as the earth wall, and to prevent the collapse of the surrounding ground during the excavation work for the underground structure of the construction and civil engineering works, In addition, the tensile material is a tensile material made by twisting a plurality of strands of deformed reinforcing bars or steel wires. The deformed reinforcing bars or tensile materials are superior in strength, and if left intact in the ground, they become obstacles in the ground, There is a concern that problems such as ground compensation rights may be generated at the time of later development.

In order to solve this problem, an inner fixing agent for a removal ground anchor for easily removing a deformed reinforcing bar or a tensile material buried in the ground after construction is known.

Such a conventional anchor body has an inclined surface formed on the inside of the cylindrical body, a wedge in which an inner surface of the inclined surface is divided into approximately three pieces and a tensile material is seated at the center thereof, and a wedge is forwardly pressed Is provided to press the wedge so as to prevent the tensile material from being separated and separated.

However, according to the structure of the conventional anchor body, in order to remove the tensile material, the tensile material is pressed to retract the wedge provided inside the cylindrical body and the tensile material can be removed while the central portion is expanded. Even if it is retracted, it is not properly expanded. Even if it is extended backward, the spring provided at the rear end continuously presses the wedge, which may be a burden when removing the tensile material, .

In addition, the conventional removable inner fixing agent can not easily remove the tensile material in the event that an impact is applied to the internal fixing body of the PC strand in the process of transporting the pc strand manufactured at the factory to the construction site or during the handling in the construction work There was a problem.

Moreover, the anchor body separated from the joint due to such an external impact has been impossible to reassemble in the field, which hinders the construction progress.

In order to solve such a problem, the present applicant's patent application No. 10-2011-0144465 and patent registration No. 10-0963565 are also available.

Therefore, it is a primary object of the present invention to provide a multipurpose load distribution type ground anchor body that allows a load to be dispersed in various portions of a tensile material so that a sufficient anchor force can be secured even in a soft ground or the like, thereby efficiently obtaining a high load.

It is another object of the present invention to provide a method of separating and removing a tensile material such as a PC strand connected to an anchor body, and at the same time, So that the ground anchor body can be easily removed.

In order to accomplish the above object, according to the present invention, there is provided a multi-purpose load-dispersing type ground anchor body comprising: a head coupler coupled to a lower side of a waterproof cap, the head coupler having a taper hole formed in a longitudinal direction to penetrate a PC strand; A wedge inserted into the taper hole of the head coupler to fix the pc stranded wire; A guide hole formed inside the waterproof cap and formed in a tubular shape and having at least one slide groove formed in the longitudinal direction; A body provided on the inside of the guide hole to form a slide projection to be inserted into the slide groove, a wedge coupled to the lower portion, and a key groove formed in the lower center to key-connect the upper end of the pc strand; A pressing spring for elastically pressing the body downward; And an inner bottom body which is coupled to the head coupler by being fitted to the lower side and which supports the pc stranded wire by passing through it; The inner bottom body is formed by a plurality of the inner bottom bodies at a predetermined interval. The front end of each of the inner bottom bodies is coupled with the respective front ends of the fixed strands and the fixed strands are sequentially guided to the inner bottom body at the front side, Each of the inner bottom bodies can be formed in a multi-stage structure.

Accordingly, the multi-purpose load-dispersing type ground anchor body of the present invention is constructed such that a plurality of inner bottom bodies located in the anchorage field are connected to each other by a fixed strand, so that a plurality of inner bottom bodies are formed in multiple stages to firmly engage with the grouting material, In order to efficiently distribute the load according to the tensile force in each undergarment. Especially, since each pc strand is fixed by passing through each inner lower body, the load is applied to the inner lower body and dispersed, It is possible to secure a sufficient anchor force even in a relatively weak ground, and it is possible not only to exhibit a high load as in the case of a rock slope but also to distribute the load efficiently in a general soil foundation, It is inserted into the tapered ball of the coupler, Therefore, it is possible to maintain a stable bonding state even when an impact occurs due to movement or getting off, and it is possible to separate the pc strand from the perforation hole by releasing the engagement state of the wedge and the PC strand by rotating the pc strand by 90 degrees. The PC strand connected to the anchor body can be easily separated and removed, and at the same time, the anchor body can be securely coupled to the external impact in the field of movement, thereby improving the reliability of the product.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the installation state of a multipurpose load distribution type ground anchor body according to the present invention. FIG.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a multi-purpose load distribution type ground anchor body,
3 is a perspective view showing a main part of a multipurpose load distribution type ground anchor body according to the present invention.
4 is a conceptual view for explaining an operation relationship of a multipurpose load distribution type ground anchor body according to the present invention.
5 is a perspective view showing a fixing field portion of a multipurpose load distribution type ground anchor body according to the present invention.
6 is a perspective view showing an inner bottom joint portion of a multipurpose load distribution type ground anchor body according to the present invention.
7 is a perspective view showing a cross section of an inner bottom body engagement portion of a multipurpose load distribution type ground anchor body according to the present invention.
8 is a perspective view explaining the inner joint portion of the multipurpose load distribution type ground anchor body according to the present invention.
9 is a cross-sectional view of an inner bottom joint portion of a multipurpose load distribution type ground anchor body according to the present invention.
10 is a sectional view sequentially showing a tensile material removal state of the multipurpose load distribution type ground anchor body according to the present invention,
a) is a cross-sectional view showing the pc stiffening state,
b) is a cross-sectional view showing the state during the pressing of the pc strand,
c) is a cross-sectional view showing the state after the pc strand is pressurized,
d) is a cross-sectional view showing the rotation state of the pc strand,
e) is a cross-sectional view showing the state of separating the PC stranded wire.

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

1 to 10, the multipurpose load-dispersing type ground anchor body 100 of the present invention includes an empty waterproof cap 110 and a PC strand 10, which is coupled to the lower side of the waterproof cap 110, A wedge 130 which is inserted into the taper hole 121 of the head coupler 120 to fix the pc stranded wire 10, A guide groove 140 formed in the inside of the waterproof cap 110 and formed in a tubular shape and having at least one slide groove 141 formed in the longitudinal direction and a guide groove 140 provided inside the guide hole 140, A body 150 that forms a slide protrusion 151 to be inserted into the slide groove 141 and a wedge 130 at a lower portion and a key groove 152 at a lower center to key-couple the upper end of the pc strand 10, A pressing spring 160 for urging the body 150 downward to elastically mount the head 150 on the lower side, And an inner bottom body 170 for supporting the pc stranded wire 10 by passing through it.

The waterproof cap 110 includes a tubular first waterproof cap 111 and a second waterproof cap 112 that blocks the upper end of the first waterproof cap 111, A guide groove 113 for holding the upper end of the pressure spring 160 is formed.

The head coupler 120 is coupled to the lower portion of the first waterproof cap 111 of the waterproof cap 110 and has a stop 122 formed at the upper end thereof in a state of engagement with the first waterproof cap 111, The lower end of the lower end portion of the lower end portion of the lower end portion is caught.

The wedge 130 is divided into three equal parts in the longitudinal direction, and the connecting means 131 is formed on the upper part.

The guide hole 140 is formed at the left and right sides of the waterproof cap 110 in a longitudinal direction so that the slide groove 141 is engaged with the periphery of the first waterproof cap 111 and the lower end is formed at the upper end of the head coupler 120 And a working space 142 is formed upward from the upper end.

The operation space 142 is formed in such a manner that the length of the guide hole 140 is shorter than the inner peripheral length of the first waterproof cap 111.

The guide hole 140 may be formed integrally with the first waterproof cap 111 so that the operation space 142 and the slide groove 141 are formed as described above.

The body 150 is formed with connecting means 153 having a groove and a jaw for coupling to the connecting means 131 of the wedge 130 at the lower portion and a pair of slide protrusions 151 formed on the left and right sides, Into the slide groove (141) of the body (140).

In addition, a key groove 152 is formed on the bottom surface of the body 150 so that the upper end of the pc strand 10 is engaged with the key, so that the body 150 can be rotated by the rotation of the pc strand 10.

Further, it is preferable that a guide groove 154 is formed on the upper surface of the body 150 to guide the lower end of the pressing spring 160 so that the body 150 can be pressed downward easily.

The inner lower body 170 has a through hole 171 formed at the center thereof in the longitudinal direction, a plurality of support grooves 173 formed at the outer periphery of the rear side, and a plurality of guide grooves 174 formed at the outer periphery of the front side.

In addition, the fixing groove 176 is provided in the supporting groove 173 so that the fixing strand 175 can be firmly fixed to the supporting groove 170 of the inner bottom body 170, It is ideal for the grooves 174 to be formed linearly on one another and to be formed on the center line in a plurality of radiations.

In addition, it is preferable that a guide pin 172 is formed on the front end of the inner lower body 173 so that the rear side of the head coupler 120 can be guided.

In addition, the inner bottom 170 is formed by a plurality of spaced-apart inner sheaths 170, each of which has a front end connected to the respective fixed strand 175 and a fixed strand 175 connected to the inner bottom 170, and the front end is coupled to the fixing band 177 so as to be integrated with each other, so that the inner lower body 170 can be formed in multiple stages.

It is preferable that the fixing strand 175 is maintained in a spirally uncoated state to firmly bond with the grouting material to improve the fixing efficiency.

In addition, it is preferable that the pc strand 10 is coated with a synthetic resin or the like so that the perforation hole can be easily removed after being laid.

In particular, it is preferable that the inner bottom member 170 is coupled to the rear side of the fixed strand 175 with a predetermined gap therebetween so that the load due to the tension can be efficiently dispersed.

Therefore, since the fixed strand 175 and the pc strand 175 are maintained in a multi-tiered state, the load due to the tension can be effectively dispersed in the fixing zone.

In addition, the inner bottom body 170 is formed with the support grooves 173 and the guide grooves 174 in the form of a radiation so that the PC strand 10 for fixation, the fixing strand 175 or the like is fixed by the fixture 176, So as to smoothly guide the PC stranded wire 10 and the fixed stranded wire 175 through which they are fixedly coupled to the rear ends of the fixed stranded wires 175 having different lengths.

The operation of the present invention will be described as follows.

First, an anchor is inserted into a perforation hole, a grouting material is injected into the perforation hole to be hardened, and then the tensile strength PC strand 10 is pulled and pulled. Thus, the bonding force with the grout is improved so that the shear force can be efficiently reinforced.

Further, since the plurality of inner lower bodies 170 located at the anchorage site are connected to each other by the fixed strand 175 so that a plurality of inner bottom bodies 170 are formed in multiple stages to firmly engage with the grouting material, So that the load on the inner lower body 170 can be efficiently dispersed.

That is, since each pc stranded wire 10 is fixed by passing through the respective inner lower body 170, when the pc stranded wire 10 is tensioned, a load is applied to the inner lower body 170 and dispersed and loaded, It is possible to secure sufficient anchor force even in relatively soft ground, and it is possible not only to exert a high load as in the rock, but also to distribute the load efficiently.

When the PC strand 10 through the inner bottom 170 is passed through the taper hole 121 of the head coupler 120 and the front end of the pc strand 10 is inserted into the key groove 152 of the body 150, The seawater 150 is continuously pressurized by the pressure spring 160 to engage the wedge 130 with the taper hole 121 of the head coupler 120. This causes the pc strand 10 to be in a rigid engagement state So that it is possible to maintain a firm coupling state even if an impact occurs due to movement or getting off.

Particularly, in the anchor body 100 of the present invention, when the pc strand 10 is to be removed after the grouting process, when the pc strand 10 is pushed into the hole, the slide protrusion 151 of the body 150 is inserted into the hole The slide protrusion 151 is interlocked with the slider 140 by rotating the PC strand 10 by 90 degrees at this time so that the slide protrusion 151 is moved in the forward direction along the slide groove 141 of the slider 140 to move to the work space 142. At this time, So that the body 150 is maintained in the forward movement state despite the elasticity of the pressing spring 160. [

The wedge 130 coupled to the lower portion of the body 150 also advances by advancing the body 150 to come out of the taper hole 121 of the head coupler 120 to release the stuck state of the pc strand 10, the PC strand 10 can be easily pulled out of the perforation hole by pulling the strand 10 from the outside so as to disperse the load of the fixing section due to tensile and to remove the covered pc strand 10.

10: pc strand 100: anchor body
110: waterproof cap 111: first waterproof cap
112: second waterproof cap 113: guide groove
120: head coupler 121: taper ball
122: upper jaw 123: connection protrusion
130: Wedge 131: Connection means
140: guide sphere 141: slide groove
142: working space 150: body
151: slide projection 152: keyway
153: connecting means 154: guide groove
160: pressure spring 170: inner lower body
171: Through-hole 172:
173: Support groove 174: Guide groove
175: Settlement strand 176: Fixture
177: Fixed band

Claims (8)

And a second waterproof cap 112 having a tubular first waterproof cap 111 and blocking the upper end of the first waterproof cap 111. The second waterproof cap 112 is provided with a pressing spring 160 And the head coupler 120 is coupled to the lower part of the first waterproof cap 111 of the waterproof cap 110 so as to be engaged with the first waterproof cap 111, A waterproof cap 110 for forming a jaw 122 to catch the lower end of the guide hole 140,
A head coupler 120 coupled to a lower side of the waterproof cap 110 and having a taper hole 121 extending in a longitudinal direction through which the PC stranded wire 10 passes,
A wedge 130 inserted into the taper hole 121 of the head coupler 120 to fix the pc strand 10,
A pair of right and left slide grooves 141 are formed in the longitudinal direction of the waterproof cap 110 so as to be engaged with the periphery of the first waterproof cap 111 of the waterproof cap 110, A guide hole 140 is formed to be shorter than the inner circumferential length of the first waterproof cap 111 so as to be engaged with the engagement protrusion 121 formed at the upper end of the first waterproof cap 111, ,
A slide protrusion 151 is formed inside the guide groove 140 so as to be inserted into the slide groove 141 and a wedge 130 is coupled to a lower portion of the slide protrusion 151. A key groove 152 is formed at a lower center, A body 150 for key-coupling an upper end of the body 150,
A pressing spring 160 for elastically pressing the body 150 downward,
A through hole 171 is formed at the center in the center of the head coupler 120 so as to penetrate through the PC stranded wire 10 and a plurality of support grooves 173 are formed on the rear outer periphery, A plurality of guide grooves 174 are formed in the support groove 173 so that the fixation strand 175 is firmly fixed to the support groove 170 of the inner bottom body 170 to be integrated And a lower inner body (170)
The inner lower body 170 is formed with a plurality of spaced apart intervals and each of the inner lower bodies 170 is connected to the respective fixed strand 175 and the fixed strand 175 is connected to the inner lower body 170 on the front side The shear is bound by a fixing band 177 so that the fixed strand 175 is fixed multiple times to the inner bottom 170 and the pc strand 10 is passed through the inner bottom 170 to form the waterproof cap 110 , And are connected to the inner lower body (170), respectively. delete delete delete delete delete delete delete

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