KR101293126B1 - Permanent anchor with tendon of artificial fiber - Google Patents

Abstract

PURPOSE: A permanent anchor with an artificial fiber anchor body is provided to improve corrosion resistance, to be manufactured at a low cost, and to maintain high intensity. CONSTITUTION: A permanent anchor with an artificial fiber anchor body comprises an anchor body (101), a corrugated pipe (107), a resin pipe (115), a leading end fixing device (111), a corrugated pipe cap (109), a grout body (113), a pressure plate, and an anchor head. The anchor body is inserted into the borehole (103) of a slope. The corrugated pipe is smaller than the inner diameter of the borehole and is greater than the outer diameter of the anchor body. The corrugated pipe surrounds the anchor body. The resin pipe is installed on the outer circumference of the anchor body from the entrance of the borehole to a predetermined depth. The inside of the resin pipe is filled with a lubricant. The leading end fixing device is inserted into the leading end of the anchor body. The corrugated pipe cap is installed at the leading end of the corrugated pipe. The inner circumference of the corrugated pipe cap is joined to the outer circumferential screw thread of the leading end fixing device. The grout body is filled into between the anchor body and the corrugated pipe, and the corrugated pipe and the borehole. The pressure plate and the anchor head are installed on the outer side of the slope around the entrance of the borehole to apply a tensional force to the anchor body. [Reference numerals] (AA) Anchor head; (BB) Free field; (CC) Anchoring field

Description

Permanent anchor with artificial fiber anchor

The present invention relates to a permanent anchor having a structure with high stability as an anchor can be manufactured at low cost by configuring the anchor body of artificial fibers.

Permanent anchor is a structure consisting of strands that are typically concentrically installed around the deformed reinforcing bar and the deformed reinforcing bar, a representative example of such a configuration is registered Patent No. 10-0793743 (Invention: permanent anchor assembly method and apparatus thereof) (Hereinafter referred to as 'prior art').

1 is an exploded perspective view for explaining a permanent anchor of the prior art.

The permanent anchor assembly 10 of the prior art is provided with a deformed reinforcing bar 20 and a plurality of strands 22 to maintain a parallel state at a predetermined distance from the deformed reinforcing bar 20, and is inserted into a drilled hole formed in the slope. In addition, the permanent anchor assembly 10 is located at the inlet of the drilling hole, the first pressure plate 30 through which the deformed reinforcing bar 20 and the strand wire 22 penetrates; A first acupressure device plate (50) positioned at a predetermined distance from the first acupressure plate (30) and through which the deformed rebar (20) and the stranded wire (22) pass; A drawing member having a body inserted into the through hole of the first pressure device plate 50 and screwed with the deformed rebar 20, and a head supporting the first pressure device plate 50; A gap retaining hole 35 for maintaining and fixing the gap between the first pressure plate 30 and the first pressure device plate 50, and a deformed rebar 20 and a strand wire passing through the first pressure plate 30. A wedge for supporting the tensile force of 22).

However, the base that maintains the rigidity of the conventional permanent anchor assembly 10 is made of a metal material, such as the deformed reinforcing bar (20) and the strand (22) is made of expensive, if the salt is a coast or acid soil Corrosion quickly.

The present invention has been invented in view of such a point, and the problem of the present invention is to provide a permanent anchor that can be manufactured at low cost while improving the corrosion resistance by using artificial fibers as anchors.

Another problem of the present invention is to maintain high rigidity when using an artificial fiber as an anchor body.

Further challenges of the present invention will be described in the course of describing the embodiments of the present invention.

Solution to solve the problem is a permanent anchor is inserted into and fixed in the drilling hole formed inward from the slope: an anchor body formed of artificial fibers inserted into the drilling hole; A resin pipe installed inside the anchor body and installed from an inlet of the drilling hole to a predetermined depth; A friction reinforcing pipe having a diameter larger than that of the resin pipe and having the anchor body installed therebetween and installed between the tip of the resin pipe and the tip of the anchor pipe; A corrugated pipe smaller than an inner diameter of the drilling hole and having the resin pipe and the friction reinforcing pipe installed therein; A grout body filled between the inner surface of the corrugated pipe and the outer surface of the resin pipe and the corrugated pipe, and between the outer surface of the corrugated pipe and the hole; It includes a lubricant filled between the anchor body and the resin tube, between the anchor body and the friction reinforcement pipe.

In addition, the present invention further comprises a resin pipe installed on the outer circumferential surface of the anchor body from the inlet of the drilling hole to a predetermined depth, it is preferable that the inside of the resin pipe is filled with a lubricant.

In the present invention, it is preferable that a packing for preventing the leakage of the lubricant is installed at the front end of the resin tube.

Further, in the present invention, it is preferable that a friction reinforcement pipe having a smaller diameter than the corrugated pipe and having a larger diameter than the resin pipe is installed between the packing installation position of the anchor body and the tip portion.

In addition, in the present invention, it is preferable that the protruding jaw is formed in the outer circumferential surface of the friction reinforcement tube so as to increase the resistance when the anchor body is drawn out or is serrated.

In addition, the anchor head in the present invention the pressure plate formed with a cylindrical hole which is installed to the outside of the inlet of the drilling hole to enable the anchor re-tension to perform a function as a permanent anchor; A wedge fixing device having a screw thread formed on an outer circumferential surface thereof and having a wedge insertion hole formed in an inclined shape such that a diameter thereof decreases downwardly; The inner circumferential surface includes a body having a sawtooth corrugated anchor body passage hole formed therein and an anchor wedge having an extended jaw extending downward from an upper surface of the wedge fixing device to an outer circumferential side of the body. It is preferable that the taper portion is formed to have a smaller outer diameter toward the lower portion and an insertion portion extending from the tapered portion to have a uniform outer diameter.

In addition, the wedge fixing device is inserted into the screw hole formed in the center in the present invention, the wedge fixing device further comprises an anchor re-tensioning device formed with a tension jack fixing groove formed inward to the outer lower end, tension jack in the tension jack fixing groove It is preferable to insert the tension to tension the anchor.

In the present invention, the artificial fiber is made of a material having a high strength and elastic modulus of para-aramid fiber, ultra high molecular weight polyethylene fiber, polyallylate fiber, PBO fiber, carbon fiber, polyketone fiber or a mixture thereof It is preferable.

According to the present invention having the above-described problems and solutions, by using an artificial fiber having a high strength and high elastic modulus as the anchor body, it is possible to install a permanent anchor with a low cost and durable, and a permanent anchor in a configuration suitable for applying artificial fibers By providing the anchoring body of the artificial fiber, the tension and fixing force of the artificial fiber are increased.

1 is an exploded perspective view for explaining a permanent anchor of the prior art.
2 is a cross-sectional view of a permanent anchor explaining a first embodiment of the present invention.
3 is a cross-sectional view of a second embodiment of the present invention.
4 is a cross-sectional view showing another form of friction reinforcing pipe applied to the second embodiment of the present invention.
5 is a cross-sectional view showing the overall configuration of the anchor head of the present invention.
6 is a plan view and a front view of the anchor wedge of the present invention.
Figure 7 is a cross-sectional view showing a state in which the anchor body is coupled to the anchor wedge of the present invention.
Figure 8 is a plan view, side cross-sectional view, bottom view of the anchoring device of the anchor wedge of the present invention.
9 is a front view and a plan view of the anchor re tensioning device coupled to the outer peripheral surface of the wedge fixing device.

2 is a cross-sectional view of a permanent anchor explaining a first embodiment of the present invention.

Permanent anchor 100 of the first embodiment shown in Figure 2 is an anchor body 101 is inserted into the drilling hole 103 formed in a predetermined depth cylindrically from the slope as a tension anchor, and the drilling hole 103 It is smaller than the inner diameter of the formed larger than the outer diameter of the anchor body 101 is installed to surround the anchor body 101, to increase the fixing force with the grout body 113, the corrugated pipe 107 formed with a plurality of narrow nodes, anchors Corrugated pipe cap 109 fitted to the distal end of the sieve 101 and formed with a screw thread on the outer circumferential surface thereof, and installed on the distal end of the corrugated pipe 107, and whose inner circumferential surface is coupled to the thread of the outer circumferential surface of the distal end fixing device 111. ), A grout body 113 filled between the anchor body 101 and the corrugated pipe 107, between the corrugated pipe 107 and the drill hole 103, and the inlet of the drill hole 103 on the outer side of the slope. Acupressure plate and anchor head to be described later to apply a tensile force to the anchor body 101 to the anchor (anchor head) )

In addition, a resin tube 115 having a diameter smaller than the diameter of the corrugated tube 107 is installed on the outer circumferential surface of the anchor body 101 from the inlet to the predetermined depth of the drilling hole 103, and grease or The resin is filled with a lubricant such as resin, and forms a free length that can be elongated when the anchor body 101 is drawn out with respect to the resin tube 115 fixed to the grout body 113. The front end portion of the 115 is provided with a synthetic resin or rubber packing 117 to prevent leakage of the lubricant filled in the resin tube 115. In addition, when the powder particles of the grout body 113 is introduced into the resin tube 115, the anchor body 101 made of artificial fibers may be disconnected at the time of drawing, so that the packing 117 is installed to provide the grout body 113. ) To prevent inflow.

In addition, from the packing installation portion of the anchor body 101 to the tip portion, the contact point is directly contacted with the grout body 113 to form a anchorage length fixed to the ground, and the point of action of the load P on the boundary between the free field and the anchorage. Is formed.

In addition, the anchor body 101 is a so-called super fiber having a very high strength and elastic modulus, and is made of para-aramid fiber, ultra high molecular weight polyethylene fiber, polyallylate fiber, PBO fiber, carbon fiber, polyketone fiber, etc. It can be produced in various forms such as shape.

The anchor body 101 made of such artificial fibers has a very high tensile strength and elasticity, very low price, and high corrosion resistance compared to iron of the same diameter.

3 is a cross-sectional view of a second embodiment of the present invention.

The permanent anchor 200 of the second embodiment shown in FIG. 3 has a structure in which a working point P of a load exists at the tip of the anchor, and the anchor body 201 is freely drawn around the working point P as a compression anchor. do. Permanent anchor 200 is a perforated hole 203 formed on the same slope as the permanent anchor 100, the anchor body 201 of artificial fibers, the tip fixing device 211, the cap 209, corrugated pipe 207, grout A sieve 213, an anchor head, a resin pipe 215, and a packing 217 are provided, and a lubricant is filled in the resin pipe 215.

However, a friction reinforcement pipe 219 formed of a cylindrical pipe steel larger than the diameter of the resin pipe 215 is inserted into the outer circumferential surface from the packing installation position of the anchor body 201 forming the anchorage of the permanent anchor 200 to the tip end thereof. And attached to the grout body 213 so as to oppose the tensile force of the anchor body 201. A lubricant 221 is filled between the inner circumferential surface of the friction reinforcement tube 219 and the outer circumferential surface of the anchor body 201 to tension the anchor body 201 with respect to the friction reinforcement tube 219.

In addition, a plurality of protruding bands 223 are formed on the outer circumferential surface of the friction reinforcement tube 219 to increase the adhesion to the grout body 213 to increase the fixing force of the friction reinforcement tube 219.

4 is a cross-sectional view showing another form of friction reinforcing pipe applied to the second embodiment of the present invention.

Since the permanent anchor shown in FIG. 4 is identical to the permanent anchor shown in FIG. 3 except for the friction reinforcement pipe 230, all configurations are the same, and description thereof will be omitted.

On the outer circumferential surface of the friction reinforcement tube 230 shown in FIG. 4, the vertical jaw portion is installed toward the inlet of the drilling hole 203, and the sawtooth shape formed by the inclined surface inclined downward from the vertical jaw portion to the next vertical jaw portion is continuously formed. . Such a sawtooth shape causes an effect of increasing the frictional force of the contact surface of the grout body 213 and the frictional reinforcement tube when the anchor body 201 is tensioned, thereby increasing the anchoring force of the frictional reinforcement tube 230.

Figure 5 is a cross-sectional view showing the overall configuration of the anchor head of the present invention, Figure 6 is a plan view, front view of the anchor wedge of the present invention, Figure 7 is a cross-sectional view showing a state in which the anchor body is coupled to the anchor wedge of the present invention. 8 is a plan view, side cross-sectional view and a bottom view of the anchoring device of the anchor wedge of the present invention, Figure 9 is a front view and a plan view of the anchor re tensioning device coupled to the outer peripheral surface of the wedge fixing device.

When the installation of the permanent anchor as shown in Figures 2, 3, 4 is completed, the anchor head 400 is installed to draw and anchor the anchor bodies 101 and 201.

The anchor head 400 is installed to be in contact with the slope and the pressure plate 401 is formed with a cylindrical hole is installed to be facing the drilling hole 103, the lower end is installed to protrude into the drilling hole through the cylindrical hole of the pressure plate 401 Anchor wedge 420 and anchor wedge 420 are formed at the center of the anchor body through hole, the inner circumferential surface of the anchor body through the sawtooth-like wrinkles are formed so that the anchor body 101 is not returned in the tensioned state The wedge fixing device 440 is inserted to press the anchor wedge 420 so that the anchor wedge 420 is in close contact with the anchor body 101, and the wedge fixing device 440 to retension the wedge fixing device 440. Anchor retensioning device 410 screwed to the outer peripheral surface, the wedge fixing device 440, the cover 403 is coupled to the pressure plate 401 by a bolt 405 to cover the anchor re-tensioning device 410 do.

The anchor wedge 420 has an inner circumferential surface extending from the upper surface of the body 424 and the upper surface of the body 424 and the anchor body through-hole formed with the toothed pleat 427 is formed in the upper surface of the wedge fixing device 440 It is formed as an extended jaw 421 spanning.

The body 424 is composed of a tapered portion 422 which decreases the outer diameter toward the lower portion and an insertion portion 423 extending to have a uniform outer diameter from the tapered portion 422, and the insertion portion 423 includes a pressure plate 401. Pass through the cylindrical hole of the) to protrude into the drilling hole (103). In addition, the body 424 has a plurality of incisions 425 cut in the longitudinal direction from the upper end of the tapered part 422 to the lower end of the insertion part 423 so that the pressure is applied when the pressure is applied from the outside of the body 424. The pieces of body 424 separated by 425 are displaced inward. In this case, the incision 425 is formed from a position spaced apart from the upper end of the body 424 so that when the external force is applied to the body 424, the upper end of the body 424 is integrally attached to the expansion jaw 421 and maintained firmly. Thereby preventing damage.

In addition, the inner peripheral surface of the anchor body through-hole formed in the center of the body 424, as shown in Figure 7 in the horizontal direction, that is, the locking projection protruding inwardly to prevent the drawn anchor body 101 is restored to its original position A sawtooth-like pleat is formed of an inclined surface formed to be wider outwardly from the jaw so as to be downward from the jaw so as to prevent the anchor body 101 drawn upward by the drawing device from being moved back toward the tip or the load action point P. do.

The wedge fixing device 440 having a cylindrical shape and a thread 443 formed on an outer circumferential surface thereof has a wedge insertion hole 445 formed to allow the anchor wedge 420 to be inserted into the center thereof. The wedge insertion hole 445 is formed to be inclined such that the upper portion has a large inner diameter and the inner diameter decreases toward the lower portion so as to press the body 424 from the outside to the inside while serving the taper portion 422 of the body 424. .

In order to make the wedge fixing device 440, the anchor wedge 420, and the anchor body 101 configured as described above, the anchor wedge 420 is inserted into the wedge insertion hole 445 of the wedge fixing device 440. After the insertion portion 423 is projected downward from the 440, the anchor body 101 passes upward from the bottom of the anchor body through hole of the anchor wedge 420 so that the upper end of the anchor body 101 is anchor wedge 420. The anchor body 101 is pulled upward so as to protrude outward from the upper end of the. As such, when the anchor body 101 protrudes upward from the upper surface of the anchor wedge 420, the insertion portion 423 of the anchor wedge passes through the cylindrical hole of the pressure plate 401 so as to protrude downward into the drilling hole 103. . In this state, while pushing the wedge fixing device 440 and the anchor wedge 420 downward with the drawing device not shown, when the anchor body 101 is lifted upward and drawn out, the anchor body of the anchor wedge 420 passes. The drawn state is maintained by the sawtooth wrinkle of the ball.

In addition, the wedge fixing device 440 is inserted into the installation hole 411 formed in the center of the anchor re-tensioning device 410 is installed. A thread is formed on the inner wall surface of the installation hole 411 and screwed with the thread formed on the outer circumferential surface of the wedge fixing device 440. In addition, a plurality of tension rod inserting portions 413 are installed on the outer circumferential surface of the wedge fixing device 440 to allow the wedge fixing device 440 to be inserted by rotating the tension bar 415. In addition, the outer lower end of the anchor re-tensioning device 410 is formed with a tension jack fixing groove 430 inward, so that the anchor body 101 can be tensioned again by inserting a tension jack not shown in the drawing and lifting upwards. do. As such, when the tension of the anchor body 101 is completed, the tension bar 415 is removed, and then the cover 403 is coupled to the pressure plate 401 using the bolt 405.

Claims (8)

In a permanent anchor inserted and fixed in a drill hole formed inwardly from a slope:
An anchor body formed of artificial fiber inserted into the drilling hole;
A resin pipe installed inside the anchor body and installed from an inlet of the drilling hole to a predetermined depth;
A friction reinforcing pipe having a diameter larger than that of the resin pipe and having the anchor body installed therebetween and installed between the tip of the resin pipe and the tip of the anchor pipe;
A corrugated pipe smaller than an inner diameter of the drilling hole and having the resin pipe and the friction reinforcing pipe installed therein;
A grout body filled between the inner surface of the corrugated pipe and the outer surface of the resin pipe and the corrugated pipe, and between the outer surface of the corrugated pipe and the hole;
Permanent anchor comprising a lubricant filled between the anchor body and the resin tube, between the anchor body and the friction reinforcement pipe. delete In a permanent anchor inserted and fixed in a drill hole formed inwardly from a slope:
An anchor body formed of artificial fiber inserted into the drilling hole;
A resin pipe installed on an outer circumferential surface of the anchor body from an inlet of the drilling hole to a predetermined depth;
A lubricant filled between the anchor body and the resin tube;
A packing installed at the tip of the resin pipe to prevent leakage of lubricant inside the resin pipe;
A tip fixing device 111 installed at the tip of the anchor body;
A corrugated pipe having a diameter larger than an outer diameter of the resin pipe and the anchor body, and having a corrugated pipe cap 109 coupled to the front end fixing device 111 at a front end thereof;
And a grout body filled between the corrugated pipe and the resin pipe and between the anchor body and the corrugated pipe from the predetermined depth to the tip. delete The permanent anchor according to claim 1, wherein a protruding jaw is formed in the outer circumferential surface of the friction reinforcement pipe so as to increase resistance when the anchor body is drawn out, or is formed in a sawtooth shape. According to any one of claims 1, 3, 5, It further comprises an anchor head which is provided on the outside of the slope to maintain the tensioned state of the anchor body,
The anchor head
Acupressure plate formed with a cylindrical hole which is installed to the outside of the inlet of the drilling hole;
A wedge fixing device having a screw thread formed on an outer circumferential surface thereof and having a wedge insertion hole formed in an inclined shape such that a diameter thereof decreases downwardly;
An inner circumferential surface includes an anchor wedge formed with a tooth-shaped pleated anchor body and an anchor wedge having an extended jaw extending downward from an upper surface of the body to an outer circumferential side thereof,
The body is a permanent anchor, characterized in that consisting of a tapered portion and the insertion portion extending to have a uniform outer diameter from the tapered portion as the outer diameter toward the lower portion. 7. The anchor member of claim 6, wherein the wedge fixing device is inserted into a screw hole formed at the center thereof, and the wedge fixing device is screwed, and the tension jack fixing groove formed inwardly with a tension jack fixing groove formed at the outer lower end thereof to enable retensioning to perform a function as a permanent anchor. Permanent anchor further comprising a device, characterized in that for tensioning the anchor blade by inserting the tension jack into the tension jack fixing groove. The method according to any one of claims 1, 3, 5, wherein the artificial fiber is any one of high strength and high modulus of para-aramid fiber, ultra high molecular weight polyethylene fiber, polyallylate fiber, PBO fiber, carbon fiber, polyketone fiber or Permanent anchors, characterized in that made of a material mixed with these selectively.

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