KR101985956B1 - Ground pressure type anchor with wedge having maximum expansion property for cross slope - Google Patents

Abstract

The present invention relates to a ground pressure type wedge anchor having maximum expansion properties of a cross slope. According to the present invention, provided is an anchoring method of which expansion properties of an expansion plate is maximized to be applied in a condition in which a drilling diameter is significantly enlarged more than a designed drilling hole in a non-excavation ground such as a fracture zone and the like. The length of the expansion plate is adjusted during designing to adjust the ground pressure force applied to a borehole wall to be flexibly designed and applied in accordance with a ground condition, which allows the expansion plate to function as a settling agent protection cap to easily insert an anchor body into an anchor settling position and facilitate extended settling, minimizes a settling field in comparison with a frictional anchor to realize economic construction with a minimized entire drilling field, secures tensional force required before grouting to provide the tensional force during the curing period to secure stability of a structure, thereby being excellently applied to top-down construction or a stepped construction of a temporary structure, and suppresses the occurrence of eccentricity by mutual restriction of two expansion plates to secure constructability and facilitate quality management. According to the present invention, the anchor comprises an anchor body, an expansion plate, a wedge-shaped expansion cam, a cam follower, an initial expansion means, and a restriction means.

Description

In this paper, we propose a wedge anchoring anchor with a maximum expansion property of crossed slope.

The present invention relates to a wedge-shaped anchor applying a maximum expandability of a cross slope, more specifically, to maximize the expandability of the expansion plate and to apply the borehole in an excavation area such as an insulation block even when the borehole diameter is considerably wider than the design pore diameter. The length of the extension plate can be adjusted during the design, so it is possible to control the pressure acting on the pneumatic wall, so that it can be applied flexibly to the ground condition and the expansion plate can serve as the protective cap of the anchor. It is easy to expand and fix. It minimizes the settlement area compared with the friction anchor. It enables economical construction with the minimum total factory capacity. It also ensures the necessary tension before grouting and shows the stability of the structure during the curing period. It can be applied to the top down construction or the step construction of the temporary construction. By this the extension to extend to each other at the same time the control relates to ensuring workability and wedge anchors pressure quality control is easily applied so that the maximum extension of the cross slope.

In general, the ground anchor construction method and nailing construction method are introduced as an alternative method for the earth strut strut, and it is used for the earth wall, reinforcement of the retaining wall, prevention of the buoyancy of the building, prevention of drawing of the seawater, prevention of collapse of steep slope, However, it can be said that the current earth retaining works are being constructed using the ground anchor construction method.

The existing anchor method is a friction type long type, and the adhesion force between the cement pole and the PC steel strand is progressively broken due to the continuous tensile force. As a result, the anchor can not play the role of anchor If the fixing length becomes longer and exceeds a certain length, the fixation function is lost and the use of the anchor is deteriorated. In addition, the hypothetical anchor in the city has a problem that causes an enormous hindrance to the civil works such as the digging of the adjacent building by the anchor body buried in the ground.

In order to solve the above problems, a frictional compression type anchor composed of a fixture, a PC strand, a slide pipe, an anchorage fixture, and a fixing stage has been developed, and an anchor for removal has been developed in a hypothetical anchor utilizing a friction compression type anchor There is a bar.

The fixing body of the friction compression type anchor is also a type that resists the pulling force due to the adhesion force between the P.C steel rod and the ground simply because of low adhesion force of the fixing body,

Therefore, it is required to introduce a device that faithfully performs the function of the earth anchor main body.

As a prior art for solving the problems of the prior art, Korean Patent No. 10-0488118 (registered on April 28, 2005) "Compressive expansion anchor earth anchor fixing body" is used to prevent the buoyancy of a building wall, reinforcement of a retaining wall, The present invention relates to a fixing body for anchor, nail, and lock bolt used for preventing drawing-out, prevention of collapse of steep slopes, prevention of earthquakes, and other constructions. The fixing body is mounted on the inner side of the helical spring steel, And a protruding and expanding pressure-type fixing body mounted on a distal end of the steel bar with a protruding wedge through which a steel bar with the guide cylinder is inserted and four triangular plates are mounted,

It can be applied regardless of its location, and it can be constructed by controlling the anchor quantity and depth of construction in any large construction, and by using spring steel, it is possible to increase resistance to pulling force by increasing adhesion force due to increase in sectional area, The present invention discloses a technique for preventing a tensile crack in a ground due to a compressive force acting on the ground due to the tip of the ball, and also to provide a compression type, an acupressure type, and a compression and an acupressure simultaneously.

However, the prior art has the following problems.

First, it is not applicable to grounds such as fracture zones (fracture zones), which are difficult to maintain the pores of the perforated holes and the pores of the pores, because of low expandability, and are limited to rocks such as soft rocks or light rocks.

Second, a separate bundling device is required outside the expansion plate when the anchor body is assembled. Accordingly, there is a problem in that the workability is deteriorated in the process of installation of the anchor, the tension, and the like.

Third, there is a problem in that the construction process is complicated, such as expansion of the perforation hole, expansion of the packer before tension, release of the bundling device, and poor workability.

Korean Registered Patent No. 10-0488118 (Registered on Mar. 28, 2005) " Compressive expansion type earth anchor fixing body "

Accordingly, it is an object of the present invention to provide a wedge-anchoring anchor that maximizes the extensibility of an expansion plate and is applicable to a ground condition where the pore diameter of the perforation hole differs from the design pore size, .

Another object of the present invention is to provide a wedge pressure anchor applying a maximum expandability of a cross slope so that the expansion plate can function as a fuser protective cap so that the fuser can be smoothly inserted and extended to a target position of the perforation hole .

Another object of the present invention is to provide a wedge-pivoted anchor applying a maximum expandability of a cross slope so that an economical construction can be achieved with a minimum of a conventional factory for a long anchor in friction.

Another object of the present invention is to provide a wedge pressure anchor applying a maximum expandability of a cross slope so as to simplify a construction process and ensure safety during construction by securing sufficient torsional force before grouting, .

Another object of the present invention is to provide a wedge pressure anchor which can adjust the extension width and length of the expansion plate to increase the applicability to the ground and adjust the stress acting on the air wall, .

It is still another object of the present invention to provide a wedge-pivoted anchor to which a maximum expandability of a crossover slope is applied so as to improve workability and quality by allowing two expansion plates to be simultaneously expanded by controlling mutual movement.

According to an aspect of the present invention, there is provided an anchor body comprising: an anchor body; An extension plate surrounding upper and lower portions of the anchor body; A wedge-shaped extension cam provided on the anchor body; A cam follower provided on the extension plate; An initial expansion means for expanding said expansion plate; And an anchoring means for preventing the upper and lower extension plate bodies of the upper and lower extension plates from being opened before being inserted into the perforation hole, wherein the anchor body includes left and right anchor bars arranged side by side at a distance from each other And the extension plate includes upper and lower extension plate main bodies enclosing the anchor body at the upper and lower sides thereof and upper and lower end caps for preventing the entry of the gravel when inserted into the perforation holes, Wherein the wedge-shaped extension cam is engaged between the left and right anchor bars, and the rear end of the wedge-shaped extension cam is positioned at the upper end of the left and right anchor bars so that the rear end thereof is positioned on the center line of the left and right anchor bars An upper inclined cam surface formed so as to be inclined downward and a rear inclined cam surface inclined downward so that its tip is located at the lower end of the left and right anchor bars and the rear end is positioned on the center line of the left and right anchor bars Wherein the cam follower is coupled to an inner circumferential surface of the upper extension plate main body and has a distal end located on an inner circumferential surface of the upper extension plate body corresponding to the upper inclined cam surface and a rear end of the lower extension plate body An upper cam follower piece having an inclined surface formed to be inclined downwardly toward the rear so as to be positioned on the inner circumferential surface of the lower expanding plate main body and a lower cam follower piece coupled to an inner circumferential surface of the lower expanding plate main body, And a lower cam follower piece having an inclined surface formed to be inclined upward toward the rear so as to be positioned on the inner circumferential surface of the upper expansion plate main body, wherein the initial expanding means comprises: a support pin fixed between the tip ends of the left and right anchor bars; A coil portion supported on the pin, A torsion spring having an upper arm portion for elastically supporting the base upper extension plate main body upwardly and a lower arm portion extending from the coil portion to elastically support the lower extension plate main body downwardly; And a guide tube which is fixed to an inner circumferential surface of the lower extension plate main body and protrudes toward the upper extension plate main body and is inserted and guided by the guide bar, Upper and lower end restraint pieces projecting from the rear end side and overlapping with each other in the forward and backward directions, upper and lower restraint pin holes formed in the upper and lower end restraint pieces, and an end restraint pin fitted into the upper and lower restraint pin holes And a wedge-shaped anchor applying the maximum expandability of the intersecting incline to the wedge- All.

The left and right anchor bars may be disposed in a space in the middle of the anchor body so as to be used as an installation space of the cam follower attached to the extension body to maximize the expandability.

In constructing the anchor body, left and right anchor bars are arranged to correspond to the anchor's tensional force, and a wedge-shaped extension cam having a sufficient length is provided to allow stress acting on the wedge-shaped extension cam .

A crossing slope is provided on a portion of the cam follower attached to the extension plate main body to secure the expandability and, if necessary, the cross width of the cross slope plane is adjusted to adjust the width of the extension, (Stress) that is transmitted to the user.

The connecting wire is connected to the rear ends of the left and right anchor bars, the left and right anchor bars, the wedge-shaped extended cams, and the cam followers and the end caps are used as a coupling device. As shown in FIG.

A tensioning head may be disposed at a rear end of the left and right anchor bars to provide an anchor head at a rear end thereof to secure a space between the left and right anchor bars and a wedge-shaped extension cam and a cam follower.

According to the wedge-anchoring anchor applying the maximum expandability of the cross slope of the present invention, it is possible to maximize the expandability of the expansion plate and to apply it even in a condition where the borehole diameter is considerably wider than the design borehole, It can be adjusted during design and can control the pressure acting on the pneumatic wall so that it can be applied flexibly to the ground condition and the expansion plate can act as a protective cap for the anchor, It minimizes the settlement area compared to the friction anchor and enables economical construction with the minimum of the entire steel mill. It also secures the necessary tension before grouting and ensures the stability of the structure during the curing period. down construction or step construction of a pseudo-structure, and the two expansion plates are controlled by each other So that it is easy to secure the workability and quality control.

It is also possible to minimize the total fabric factory compared to the long anchor with friction by introducing the anchors of the pressure type, and it is stable against the progressive destruction and can secure the tension force in the long term.

In order to ensure maximum extensibility, two hollow anchor bars are formed by placing a space in the middle part of the inner lower body, a swash plate can be installed in the space between the two anchor bars, a guide groove is provided for expanding the swash plate, So that the expansion width of the expansion plate can be secured.

In addition, a cross sloping surface is devised so that additional extension can be given by the overlapping length of the cross sloping surface by placing a cross sloping surface on the swash plate. The intersection of the inclined surfaces is formed to be thin at a half of the thickness of the inclined surface in the circumference to form concave and convex portions. The concave and convex portions allow the intersection of the inclined surfaces, and the upper and lower (or left and right) inclined surfaces are constrained to each other, So that different displacements do not occur.

The anchor body and the extension plate should be maintained in an integrated state when inserting into the perforation hole, and the anchors of weight should be stably maintained even during handling and installation, so that the extension plate can be used as a protective cap for holding an anchor assembly . After the anchor body is installed at the required position, the restraint of the extension plate is released by the simple key operation, and the expansion plate expands due to the expansion force of the spring, so that the expansion plate exerts frictional resistance due to the acupressure force in proportion to the pulling force.

The anchor bar, the wedge-shaped extension cam, and the pulling wire connecting member are integrally formed. When the anchor is installed in the perforation hole, the anchor assembly forms an anchor assembly. When the anchor is fixed, the extension plate is expanded by the key operation and the expansion force of the spring. As shown in FIG.

The upper cap is attached to the lower part of the anchor body and is used for anchor coupling. When the anchor body is inserted, no resistance is generated at the tip, so that the insertion operation can be smoothly performed. It is devised to be able to switch to extended mode by combining. The anchor head and the center of the tension head are provided with a hollow part so that the grouting material can be smoothly injected during the grouting operation after the tension.

The anchor body and extension plate are in the form of a bar having a longer length after tensioning. After grouting injection and curing, the grout material binds the anchor body and the extension plate so that it can act as an integrated lower body. Therefore, when the grout material is solidified, the anchor body and the extension plate become the inner bottom body, and the rear end of the anchor body can be subjected to the compression friction resistance, so that the friction resistance other than the ground pressure is exhibited.

1 to 8 show a preferred embodiment of a wedge-pivoted anchor to which the maximum expandability of a cross slope according to the present invention is applied,
1 is a perspective view showing a state before expansion,
2 is a longitudinal sectional view showing a state before expansion,
3 is a cross-sectional view taken along line AA and BB in Fig. 2
4 is a perspective view showing a state after expansion,
5 is a longitudinal sectional view showing a state after expansion,
FIG. 6 is a cross-sectional view taken along line CC, line DD, line EE in FIG. 5,
7 is an exploded perspective view of the extension plate and the anchor body,
8 is a detailed exploded perspective view of the extension plate and the anchor body,

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wedge-shaped anchor to which a maximum expandability of a crossing slope according to the present invention is applied will be described in detail with reference to the preferred embodiments illustrated in the accompanying drawings.

1 to 8 show a preferred embodiment of a wedge-pivoted anchor to which the maximum expandability of a cross slope according to the present invention is applied.

As shown in FIGS. 1 to 8, the wedge-pivoted anchor to which the maximum expandability of the intersecting slopes according to the present embodiment is applied includes an anchor body 100; An expansion plate 200 surrounding upper and lower portions of the anchor body 100; A wedge-shaped extension cam 300 provided on the anchor body 100; A cam follower 400 provided on the extension plate 200; An initial expansion means (500) for expanding the expansion plate (200); And restraining means (600) for restricting expansion of the extension plate (200).

The anchor assemblies 100 include left and right anchor bars 110 and 120 arranged side by side and spaced apart from each other.

The left and right anchor bars 110 and 120 may be flat or semicircular, but they are preferably formed as a loudspeaker, as shown in the drawing.

The anchor body 100 further includes a pulling wire connecting member 130 coupled between the rear ends of the left and right anchor bars 110 and 120.

The pulling wire connecting member 130 is formed on a center line of the left and right anchor bars 110 and 120 to form a pulling wire connecting hole 131 to which a pulling wire (not shown) is connected.

The pulling wire can be connected to the distal end portion by inserting an engaging member (not shown) having an outer diameter larger than the inner diameter of the pulling wire connecting hole 131 in a state where the pulling wire is inserted into the wire connecting hole 131.

In addition, the anchor body 100 further includes a tension head 140 that covers the trailing end of the traction wire connecting member 130.

The pulling head 140 is formed with a draw wire draw-out hole 141 positioned on the coaxial line with the draw wire connecting hole 131.

A threaded portion 132 is formed on the pulling wire connecting member 130 and a female threaded portion 142 is formed on the pulling head 140 so that the pulling wire connecting member 130 and the tensioning head 140 are screwed It can be configured to be detachable.

The extension plate 200 includes semi-cylindrical upper and lower extension plate bodies 210 and 220 for covering the anchor body 100 from above and below.

The extension plate 200 is coupled to the top ends of the upper and lower extension plate bodies 210 and 220 and is provided with upper and lower end caps 230 and 240 for preventing the entry of the gravel- .

The upper end cap 230 is formed as a half dome opened rearward and downward, and the lower end cap 240 is formed as a half dome opened rearward and upward.

The upper and lower end caps 230 and 240 are provided with bolts 233 and 243 through bolt through holes 232 and 242 formed in a plurality of coupling pieces 231 and 241 formed at the rear end of the upper and lower end caps 230 and 240, Can be coupled by fastening them to bolt fastening holes (234, 244) formed on the distal end surfaces of the extension plate bodies (210, 220).

The wedge-shaped extension cam 300 is coupled between the left and right anchor bars 110 and 120. The distal end of the wedge-shaped extension cam 300 is positioned at the upper ends of the left and right anchor bars 110 and 120, The upper inclined cam surface 310 is formed at a lower end of the left and right anchor bars 110 and 120 so as to be positioned on the center line of the bars 110 and 120, And a lower inclined cam surface 320 formed to be inclined upward toward the rear so as to be positioned on the center line of the anchor bars 110 and 120.

The wedge-shaped extension cam 300 may be integrally formed between the left and right anchor bars 110 and 120 or may be coupled to the left and right anchor bars 110 and 120 by welding or screwing.

The cam follower 400 is coupled to the inner circumferential surface of the upper extension plate body 210 and has a tip corresponding to the upper inclined cam surface 310 on the inner circumferential surface of the upper extension plate body 210, The upper cam follower piece 410 has an inclined surface 411 formed on the inner circumferential surface of the lower inclined cam surface 320 and has an inclined surface 411 inclined downward to be positioned on the inner circumferential surface of the lower inclined cam surface 320, A lower cam follower piece 420 having an inclined surface 421 whose tip is positioned on the inner circumferential surface of the lower extension plate body 220 and whose rear end is located on the inner circumferential surface of the upper extension plate body 210, ).

The upper cam follower piece 410 may be integrally formed with the upper extension plate body 210 or may be coupled to the upper extension plate body 210 by welding or screwing, And may be integrally formed on the lower extension plate body 220 or may be coupled to the lower extension plate body 220 by welding or screwing.

The right side surface of the upper cam follower piece 410 and the left side surface of the lower cam follower piece 420 are arranged to contact each other on a vertical plane passing through the center line of the extension plate 200.

The initial expanding means 500 includes a support pin 510 fixed between the tip ends of the left and right anchor bars 110 and 120, a coil portion 530 supported by the support pin 510, An upper arm portion 540 extending from the portion 530 to elastically support the upper expansion plate main body 210 upward and a lower arm portion 530 extending from the coil portion 530 to elastically support the lower extension plate main body 220 downward, And a torsion spring 520 having an arm portion 550.

The distal end of the upper arm portion 540 contacts the inner circumferential surface of the upper extension plate body 210 and the inclined surface 411 of the upper cam follower piece 410. The distal end of the lower arm portion 550 contacts the lower extension plate body 220 And the inclined surface 421 of the lower cam follower piece 420. The lower cam follower piece 420 and the lower cam follower piece 420 are disposed to contact each other.

The contact rings 541 and 551 are formed at the distal ends of the upper and lower arm portions 540 and 550 so that the contact resistance when contacting the inner peripheral surface of the upper and lower extension plate bodies 210 and 220 and the inclined surfaces 411 and 421 It is desirable to minimize.

The initial expanding means 500 includes a guide rod 560 fixed to the inner peripheral surface of the upper extension plate body 210 and projecting toward the lower extension plate body 220 and a guide rod 560 fixed to the inner peripheral surface of the lower extension plate body 220 And a guide tube 570 protruding toward the upper extension plate body 210 and inserted and guided by the guide rod 560.

The upper and lower extension plate bodies 210 and 220 are expanded or contracted in the vertical direction without eccentricity by the guide rod 560 and the guide pipe 570.

The guide bar 560 may be fixed by welding while being passed through the upper extension plate body 210. The guide pipe 570 may be fixed to the lower extension plate body 220 by welding, can do.

A conical insertion guide protrusion 561 is formed at the lower end of the guide rod 560 and a conical insertion guide groove 571 corresponding to the insertion guide protrusion 561 is formed at an upper end of the guide pipe 570, It is preferable that the guiding rod 560 is smoothly inserted into the guide tube 570.

The restraining means 600 is for preventing the upper and lower extension plates 210 and 220 from being opened before the upper and lower extension plates 210 and 220 are inserted into the perforation hole H. [

The end restraining means 600 includes upper and lower end restraint pieces 610 and 620 which are projected from the rear end side of the inner circumferential surface of the upper and lower end caps 230 and 240 and overlap each other in the forward and backward directions, Upper and lower restricting pin holes 611 and 621 formed in the restraint pieces 610 and 620 and a distal end restraining pin 630 fitted in the upper and lower restricting pin holes 611 and 621.

The distal end restraint pin 630 connects the pull wires to one end and pulls the wire backward through the space between the left and right anchor bars 110 and 120 and the upper and lower extension plate bodies 210 and 220, Upper and lower constraining pin holes 611 and 621, respectively.

Traction wire guide grooves (111, 121) through which the pulling wire passes are formed on the outer peripheral surfaces of the left and right anchor bars (110, 120).

Hereinafter, the operation of the wedge-shaped anchor applying the maximum expandability of the cross slope according to the present invention will be described.

7, the wedge-shaped extension cam 300 and the torsion spring 520 are coupled between the left and right anchor bars 110, 120, and the upper and lower extension plate bodies 210, The lower cam followers 410 and 420 and the guide rod 560 and the guide pipe 570 are coupled to each other so that the upper and lower end caps 230 and 240 are separated from the upper and lower end restraints 610, The upper and lower end caps 230 and 240 are restrained so that the upper and lower restricting pin holes 611 and 621 formed in the upper and lower restraint pins 620 and 620 sandwich the end restraint pin 630 and then the left and right anchor bars 110 and 120 The upper and lower extension arm bodies 540 and 550 of the torsion spring 520 are urged by the inner peripheral surfaces of the upper and lower extension plate bodies 210 and 220 by applying force to the upper and lower extension plate bodies 210 and 220, The upper bolt 233 and the lower bolt 243 are passed through the bolt through holes 232 and 242 formed in the coupling pieces 231 and 241 of the upper and lower end caps 230 and 240, 210, and 220, Fastened to the bolt fastening hole (234, 244) formed on the surface will be so that the upper and lower extension body not happen is bounded by (210, 220) is constrained onto the lower end cap (230, 240).

At this time, the upper and lower extension plate bodies 210 and 220 are constrained by the upper and lower tip end restraint pieces 610 and 620 and the tip end restraint pin 630, and the pull wire connected to the tip end restraint pin 630 Since the leading end restraint pin 630 can be dismounted by pulling, the restraint and disengagement work can be simplified.

Since the upper and lower end caps 230 and 240 are coupled to the ends of the upper and lower extension plate bodies 210 and 220 in the process of inserting into the perforation hole H, the anchor body 100, the extension plate 200, It is possible to prevent the inflow of the gravel into the extension cam 300, the cam follower 400, the initial expansion means 500, and the restraining means 600, so that these operations can be smoothly performed.

At the rear end of the anchor bars 110 and 120, a pulling wire connecting member 130 and a tensioning head 140 are coupled.

The pulling wire is connected to the tip end restraining pin 630 to be pulled backward along the pulling wire guide grooves 111 and 121 formed on the outer peripheral surfaces of the left and right anchor bars 110 and 120.

In this state, the upper and lower end caps 230 and 240 are inserted into the perforation hole H, which is drilled in the ground, with the top end caps 230 and 240 as the lead. When the pulling wire is pulled, the tip end restraining pin 630 is pulled out from the restraint pin holes 611 and 621 The upper and lower tip caps 230 and 240 and the upper and lower extension plate bodies 210 and 220 coupled thereto are released.

At this time, the upper and lower arm portions 540 and 550 of the torsion spring 520, which are supported by the left and right anchor bars 110 and 120 and contracted by the upper and lower extension plate bodies 210 and 220, The upper extension plate body 210 is opened upward and the lower extension plate body 220 is opened downward.

The outer peripheral surfaces of the upper and lower extension plate bodies 210 and 220 are resiliently brought into close contact with the inner peripheral surface of the perforation hole H so that frictional resistance between the outer peripheral surface of the extension main bodies 210 and 220 and the inner peripheral surface of the perforation hole H The wedge-shaped extension cam 300 and the upper and lower cam follower pieces 410 and 410 can be prevented from coming out from the outer circumferential surface of the expansion plate 200 and the extension plate 200 when the anchor body 100 is pulled backward. 420 are smoothly expanded.

When the anchor body 100 is pulled backward, the upper and lower inclined cam faces 310 and 320 of the wedge-shaped extension cam 300 coupled between the left and right anchor bars 110 and 210 and the upper and lower cam followers The upper expansion plate main body 210 is strongly urged upward by the cam action of the inclined surfaces 411 and 421 of the pieces 410 and 420 and the lower extension plate body 220 is strongly urged against the inner peripheral surface of the perforation hole H while expanding downward .

At this time, the upper inclined cam surface 310 is formed such that its tip is located at the upper end of the left and right anchor bars 110 and 120 and its rear end is inclined downwardly toward the rear so as to be positioned on the center line of the left and right anchor bars 110 and 120 And the lower inclined cam surface 320 is inclined upward toward the rear so that its tip is located at the lower end of the left and right anchor bars 110 and 120 and its rear end is located on the center line of the left and right anchor bars 110 and 120 And the inclined surface 411 of the upper cam follower piece 410 is formed such that its tip is positioned on the inner circumferential surface of the upper extension plate body 210 and its rear end is inclined downwardly toward the rear so as to be positioned on the inner circumferential surface of the lower extension plate body 220 And the inclined surface 421 of the lower cam follower piece 420 is formed so that its tip is located on the inner circumferential surface of the lower extension plate body 220 and its rear end is inclined upward toward the rear so as to be positioned on the inner circumferential surface of the upper extension plate body 210, (200) This allows the wall to maximize danyeoldae; will exert (斷裂帶 Fracture Zone) including folding durability over the same when the perforation diameter of the hole in the ground largely perforated design property than the superior performance.

Further, since the expansion plate 200 is strongly adhered to the perforation hole H, a necessary tension can be secured even before grouting, and a milling factory for the perforation hole H can be minimized, thereby achieving economical effects.

Since the extension plate 200 is vertically guided by the guide rod 560 and the guide pipe 570, the eccentricity is suppressed and the workability and quality are improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: anchor body 110, 120: left and right anchor bars
200: extension plate 210, 220: upper and lower extension plate body
230, 240: upper and lower end cap 300: wedge-shaped extension cam
310, 320: upper and lower inclined cam faces 400: cam followers
410, 420: upper and lower cam follower pieces 500: initial expanding means
510: support pin 520: torsion spring
530: coil part 540, 550: upper and lower arm parts
560: guide rod 570: guide tube
600: restricting means 610, 620: upper and lower restraining pieces
630:

Claims (6)

An anchor body 100; An expansion plate 200 surrounding upper and lower portions of the anchor body 100; A wedge-shaped extension cam 300 provided on the anchor body 100; A cam follower 400 provided on the extension plate 200; An initial expansion means (500) for expanding the expansion plate (200); And a restraining means 600 for preventing the upper and lower extension plates 210 and 220 of the upper and lower extension plates 100 and 200 from being opened before being inserted into the perforation hole H,
The anchor assembly 100 includes left and right anchor bars 110 and 120 that are arranged side by side with a gap left therebetween and the extension plate 200 includes upper and lower portions that surround the anchor assembly 100, And upper and lower end caps 230 and 220 for preventing the adhering of soil when the upper and lower extension plate bodies 210 and 220 are inserted into the perforation hole H, 240,
The wedge-shaped extension cam 300 is coupled between the left and right anchor bars 110 and 120. The distal end of the wedge-shaped extension cam 300 is positioned at the upper ends of the left and right anchor bars 110 and 120, The anchor bars 110 and 120 are positioned at the lower ends of the left and right anchor bars 110 and 120 and the left and right anchors 110 and 120 are positioned on the center line of the left and right anchor bars 110 and 120, And a lower inclined cam surface (320) formed to be upwardly inclined rearward to be positioned on the center line of the bars (110, 120)
The cam follower 400 is coupled to the inner circumferential surface of the upper extension plate body 210 and has a tip corresponding to the upper inclined cam surface 310 on the inner circumferential surface of the upper extension plate body 210, The upper cam follower piece 410 has an inclined surface 411 formed on the inner circumferential surface of the lower inclined cam surface 320 and has an inclined surface 411 inclined downward to be positioned on the inner circumferential surface of the lower inclined cam surface 320, A lower cam follower piece 420 having an inclined surface 421 whose tip is positioned on the inner circumferential surface of the lower extension plate body 220 and whose rear end is located on the inner circumferential surface of the upper extension plate body 210, ),
The initial expanding means 500 includes a support pin 510 fixed between the tip ends of the left and right anchor bars 110 and 120, a coil portion 530 supported by the support pin 510, An upper arm portion 540 extending from the portion 530 to elastically support the upper expansion plate main body 210 upward and a lower arm portion 530 extending from the coil portion 530 to elastically support the lower extension plate main body 220 downward, A torsion spring 520 having an arm portion 550 and a guide rod 560 fixed to the inner peripheral surface of the upper extension plate body 210 and projecting toward the lower extension plate body 220, And a guide tube 570 fixed to the inner peripheral surface of the upper extension plate body 210 and projecting toward the upper extension plate body 210 and inserted and guided by the guide rod 560,
The end restraining means 600 includes upper and lower end restraint pieces 610 and 620 which are projected from the rear end side of the inner circumferential surface of the upper and lower end caps 230 and 240 and overlap each other in the forward and backward directions, Upper and lower constraining pin holes 611 and 621 formed in the restraint pieces 610 and 620 and a tip restraint pin 630 fitted in the upper and lower constraining pin holes 611 and 621,
The left and right anchor bars 110 and 120 are disposed in a space in the middle of the anchor body 100 to serve as an installation space for the cam followers 400 attached to the extension bodies 210 and 220, The wedge pressure anchor applying the maximum expandability of the cross slope is characterized in that the wedge pressure anchor is configured to be secured to the anchor.
delete The method according to claim 1,
In forming the anchor body 100, left and right anchor bars 110 and 120 are disposed to form a cross section corresponding to the anchor tension, and a wedge-shaped extension cam 300 having a sufficient length is provided to form a wedge- Wherein the anchor is configured to allow stress acting on the cam (300).
The method according to claim 1,
A crossing slope may be provided on a part of the cam follower 400 attached to the extension plate bodies 210 and 220 so as to secure the expandability and, if necessary, the crossing width of the crossing slopes may be adjusted, 210, and 220 are adjusted to adjust the pressure applied to the ground (the wall). The wedge pressure anchor applying the maximum expandability of the intersecting slopes.
The method according to claim 1,
A wedge-shaped extension cam 300, a cam follower 400, and a wedge-shaped anchor bar 110, which are coupled to the rear ends of the left and right anchor bars 110 and 120, Wherein the anchors are configured to maintain the coupled state when the anchors are installed using the caps (230, 240) as a coupling device, and to switch to the expanded mode when the anchors are tense.
The method according to claim 1,
A tensile head 140 is disposed at a rear end of the left and right anchor bars 110 and 120 and an anchor head is provided at a rear end thereof to secure a space between the left and right anchor bars 110 and 120 and a wedge- And the cam follower (400) can be installed on the wedge-shaped anchor.

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