KR100558469B1 - The compressing permanent anchor - Google Patents

Abstract

The present invention relates to a compression-type crimping anchor, wherein the anchor blade is naturally opened by the drawing of the case when the tension member is tensioned to apply a compressive force to the ground, so that the stiffness against the drawing is not achieved by the grout but by the anchor blade. The purpose is to increase the anchoring force of the anchor blades as the anchor is drawn.

Compression-type crimping anchor according to the present invention, the fixing head 10 is inserted into the anchor hole; A plurality of tension members 20 having a tip end fixed to the fixing head; A packer 30 installed in the middle of the tension member to seal the anchor hole; And, it is provided between the fixing head and the packer is configured to include a folding wedge means 40 is folded by the drawing of the fixing head when the tension member is tensioned end wedge around the anchor hole. . The folding wedge means, a pair of rods (42, 43) is coupled to the center portion rotatably through the first hinge 41 is folded around the first hinge, the pair of The rods are connected in series via the second hinge 44.

Compression, Anchor, Folding Wedge, Rod, Hinge

Description

Compression Clamping Anchors {THE COMPRESSING PERMANENT ANCHOR}

1 is a perspective view of a compression crimping anchor according to the present invention.

Figure 2 is a side cross-sectional view of the compression crimping anchor according to the present invention.

Figure 3 is an exploded perspective view of the rod applied to the compression crimping anchor according to the present invention.

Figure 4 is another illustration of the folding wedge means applied to the compression-type crimping anchor according to the present invention.

5 and 6 are a plan view showing an operating state of the compression-type crimping anchor according to the present invention.

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

10: fixing head, 11, 31: guide

20: tension member, 30: packer

40: folding wedge means, 41,44: hinge

42,43: rod, 45: band

46: torsion coil spring, 50: connecting rod

The present invention relates to a compression-type crimping anchor, and more particularly, it is possible to reinforce the ground irrespective of the state of the ground by allowing the holding force for the anchor's drawing not to be made by the grout but by the folding wedge means. The present invention relates to a compression crimp anchor.

In general, anchors are used to prevent the collapse of the incision surface at the incision site and slope stability, to prevent the groundwater of large structures such as buildings or dams, to prevent the collapse of the excavating wall surface in the underground construction of large buildings, and also to prevent earthquakes. It is installed to prevent the movement or distortion of the structure when constructing a building or a large steel tower.

The anchor method drills the anchor hole in the ground where there is a risk of collapse, using a boring machine, grout hose, a plurality of tension members and a load bearing body are inserted into this hole, and then inserted through a grout hose. The grout is injected, and when the injected grout is cured, the fastener is fastened to the other end of the tension member, and the tension member in the strand is tensioned by using hydraulic equipment to stabilize the target structure.

Such anchors support the tensile force from the surface by the ground pressure of the grouting or frictional forces with the ground.

Conventional anchors are embedded in the ground to transfer the tensile force from the surface to the ground, generally the anchor body embedded in the ground, the tension portion consisting of a tendon (tendon) such as PC strands, anchor anchoring the tension portion on the ground surface It is composed of tofu.

Concrete is injected around the anchor to form grouting to support the tensile force from the surface by the ground pressure of the grouting or the frictional force with the ground. In a conventional anchor, the anchor body is pulled by the tension force from the surface, and thus the tension force acts on the grouting.

However, the anchor according to the prior art has the following problems.

The anchor according to the prior art is to give the stiffness to the pull out by the bearing pressure of the grout, there are a number of joints around the anchor hole in which the anchor is inserted according to the state of the ground. Therefore, since the grout is filled by the injection pressure, when injected into the anchor hole, the grout leaks from the anchor hole through jointing, thereby lowering the filling rate inside the anchor hole, thereby failing to substantially reinforce the ground. At this time, even if the joint is formed only in a part, since the entire area inside the anchor hole is one space, voids are generated in the grout filled in the entire area of the anchor hole, thereby preventing reinforcement. Here, since there is no way to measure the strength inside the anchor hole, the construction proceeds without recognizing the presence of voids, and eventually a large accident due to ground collapse may occur.

In addition, since the outer circumferential surface of the anchor is generally a flat surface, a separation phenomenon occurs between the grout and the anchor, so that the anchor is drawn from the anchor hole when the tension member is tensioned, and the ground is collapsed as a result.

In addition, since the concrete forming the grouting is very vulnerable to the tensile force in many cases tensile cracking occurs in the grouting by the tensile force when the anchor is pulled. When such tensile cracking occurs in the grouting, moisture or the like penetrates through the crack, thereby causing the tendon of the tensile portion to corrode and eventually losing its function as an anchor.

The present invention is to solve the above-mentioned problems, to provide a compression-type crimping anchor that can reinforce the ground even if there is a joint or pupil in the ground by increasing the holding force against the ground as the anchor is drawn There is a purpose.

Compression-type crimping anchor according to the present invention provided to achieve the above object, the fixing head is inserted into the inside of the anchor hole; A plurality of tension members having a tip end fixed to the fixing head; A packer installed in the middle of the tension member to seal the anchor hole; And, it is installed between the fixing head and the packer is characterized in that it comprises a folding wedge means that the end is wedge-shaped around the anchor hole while being folded by the drawing of the fixing head when tensioning the tension member. .

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in FIG. 1, the compression type crimping anchor 100 according to the present invention includes a fixing head 10 inserted into an anchor hole A (see FIGS. 3 and 4), and a tip of the fixing head 10. ) And a plurality of tension members 20 having a rear end exposed to the outside of the anchor hole A, a packer 30 installed in the middle of the tension member 20 to seal the anchor hole A, and a fixing head 10 ) Is folded between the packer 30 and the packer 30 fixed to the anchor hole A when the tension member 20 is tensioned by drawing of the fixing head 10 and the end of the anchor hole A. It consists of a folding wedge means 40 wedge in the wedge.

The fixing head 10 is cylindrical and protects the breakage of the folding wedge means 40 and is fixed to the anchor hole A. As shown in FIG.

Tensile material 20 may be used a plurality of, for example, eight strands, the upper and lower sides of the folding wedge means 40 with the folding wedge means 40 so as not to interfere when the folding wedge means 40 is unfolded (Fig. 2) or left and right respectively.

The packer 30 is used as a conventional packer, such as hydraulic, milk injection type, is installed in a spaced distance rearward from the rear end of the fixing head 10 is expanded by the injection of hydraulic, milk anchor hole (A) Seal it. The front and rear of the packer 30 may be provided with a packer ring for supporting the packer 30, respectively, the tension members 30 are movable through. That is, the packer 30 is installed by the packer ring.

The folding wedge means 40 is provided between the fixing head 10 and the packer 30 and is folded while being fixed by the fixing head 10 drawn out with the packer 30 in a fixed state when the tension member 20 is tensioned. The additional anchor hole (A) is wedge-shaped in the ground, the center is coupled to the first hinge 41, a pair of rods (42, 43) rotated under the guidance of the first hinge 41 It is a structure that is connected in a chain so as to be foldable through the two hinges 44 and folded through the first and second hinges 41 and 44.

Here, since the ends of the rods 42 and 43 are lodged in the ground G, the second hinge 44 moves inward from the ends of the rods 42 and 43 so as to sufficiently secure the portion to be embedded in the ground G. It is installed in a spaced apart place.

Only one set of folding wedge means 40 may be installed, and as shown in FIG. 3, a plurality of sets may be connected and used in line through the connecting rod 50.

On the other hand, in the middle of the folding wedge means 40 so that the folding wedge means 40 is not interfered when it is inserted into the anchor hole (A) (the band 45 is a procedure when drawing the tension member 20) As shown in FIG. 4, the foldable wedge means 40 is broken by the force that is opened) and the foldable wedge means 40 are well opened, and the rods 42 and 43 are placed on the first hinge 41. An elastic member, for example, a torsion coil spring 46, which is elastically supported in the opening direction, may be installed. The torsion coil spring 46 is fitted to the first hinge 41, and both ends thereof are supported by the rods 42 and 43, respectively, so that the rods 42 and 43 are opened.

On the other hand, in the opposing portions of the fixing head 10 and the packer 30, the folding guides (11, 31) (see Fig. 5) are further formed to be in contact with the folding wedge means (40), respectively. The folding guides 11 and 31 are formed to be more convex than the center portion. This is because the rods 42 and 43 have a structure in which a central portion thereof is coupled to the first hinge 41, and the first hinge 41 side of the rods 42 and 43 is located farther than the ends of the rods 42 and 43.

And, as shown in Figure 4 for the installation of the wedge means 40, the fixing guides (12, 32) having slide holes (12a, 32a) are provided in the folding guide (11, 31), respectively. The fixing brackets 12 and 32 have one end fixed to the folding guides 11 and 31, respectively, and the first hinge 41 is slidably fitted into the slide holes 12a and 32a so that the wedge means 40 can be folded. .

The construction method of the compression type crimping anchor according to the present invention is as follows.

(S10) anchor hole perforation. Anchor 100 is installed to prevent the collapse of the ground during civil engineering, and for this purpose, the anchor hole A is drilled in the ground G using a puncher (not shown).

(S20) Insert anchor. Fixing the front end portion of the tension member 20 to the fixing head 10, the folding wedge means 40 is arranged in the folded state through the band 45 to the rear of the fixing head 10, folding wedge means The packer 30 is coupled to the rear of the 40 to assemble the anchor. This anchor assembly is inserted into the anchor hole A (see Fig. 5).

(S30) anchor hole sealing. When hydraulic and milk are injected into the packer 30, the packer 30 is expanded and the inlet side of the anchor hole A is sealed by the packer 30.

(S40) tensile. As shown in FIG. 6, when the tension member 20 is slowly tensioned through a tensioner (not shown), the tension member 20 is tensioned to move the fixing head 10 to the rear (left of the drawing reference). At this time, the fixing head 10 is drawn and moved to the left, but because the packer 30 is fixed inside the anchor hole A, the folding wedge means 40 is folded together with the fixing head 10 as follows. Will be hit. As the distance between the fixing head 10 and the packer 30 becomes closer by the drawing of the fixing head 10, the folding guides 11 and 31 become closer as the distance between the fixing head 10 and the packer 30 approaches. The folded wedge means 40 is slowly folded in contact with the state. As the folding wedge means 40 is folded, the band 45 is elastically deformed (expanded). When the folding force of the folding wedge means 40 is greater than the elastic force of the band 45, the band 45 is anchored ( A) It is broken inside.

As the folding wedge means 40 is unfolded, the band 45 is broken so that the rods 42 and 43 of the folding wedge means 40 are folded through the first and second hinges 41 and 44. The ends of the 42 and 43 are embedded in the ground G (when the torsion coil spring 46 is adopted, the rods 42 and 43 are pulled by the elastic force of the torsion coil spring 46 at the same time as the band 45 is broken. Better open by elastic force). As the tension member 20 is tensioned, the rods 42 and 43 of the collapsible wedge means 40 become more and more folded and the end is deeply embedded in the ground (G).

(S50) anchor hole sealing. The grout is injected into the anchor hole (A) to seal the anchor hole (A) so that foreign matter does not flow into the anchor hole (A). The grout injected by the present invention can be injected only at the inlet side of the anchor hole (A) because it simply seals the anchor hole (A) irrespective of the holding force on the drawing.

In the state in which the compression-type crimping anchor 100 according to the present invention is installed, a pulling force may be applied to the anchor 100 by stress, tensile force, or the like of the ground, and as the anchor 100 is drawn, the rod of the folding wedge means 40 is drawn. The anchor 100 cannot be drawn because the ends of the (2,43) are deeply embedded in the ground (G).

As described above, according to the compression-type crimping anchor according to the present invention, it is pulled out by the folding wedge means to apply a pressing force in the ground while spontaneously opened by the drawing of the case when the tension member is tensioned, regardless of the grout bearing pressure. Since there is joint stiffness in the ground or joints in the ground or in the case of soft ground, it can effectively reinforce the ground, thus preventing safety accidents and shortening the construction period. In particular, the anchor is not drawn because the brace stiffness by the anchor blades is increased as the pulling force is applied to the anchor in the anchor installed state.

In addition, since the grout only functions to seal the inlet of the anchor hole, the amount of grout is greatly reduced, thereby reducing costs and reducing work time.

In addition, the structure of the case, the anchor wing support ring and the anchor wing is simple, easy to manufacture, low production cost, there is an effect such as to minimize the occurrence of malfunction.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (5)

A fixing head 10 inserted into the anchor hole; A plurality of tension members 20 having a tip end fixed to the fixing head; A packer 30 installed in the middle of the tension member to seal the anchor hole; And one or more collapsible wedge means (40) installed between the fixing head and the packer so that the ends thereof are wedge-shaped around the anchor hole while being folded by the fixing head when the tension member is tensioned. Compression-type crimping anchor, characterized in that configured. The folding wedge means of claim 1, wherein a pair of rods (42,43) is rotatably coupled to a central portion of the pair of rods (42,43) via a first hinge (41). Compression-type crimping anchor, characterized in that the pair of rods are connected in series through the second hinge (44) so that the end is embedded in the anchor hole. The compression head according to claim 1 or 2, wherein the fixing heads and packers respectively corresponding to the front and rear ends of the folding wedge means are provided with folding guides 11 and 31 for guiding the folding of the wedge means, respectively. Type crimp anchor. [4] The fixed bracket (12) according to claim 3, wherein one end is fixed to each of the folding guides and slide holes (12a and 32a) are slidably connected to the first hinge, respectively, to connect the folding wedge means to be folded. Compression anchoring compression characterized in that it further comprises 32). [5] The elastic member of claim 4, wherein a band 45 for collecting the rods is bundled so that the rods do not interfere with the anchor hole in the middle of the folding wedge means, and the first hinge elastically supports the rods in a direction in which the rods are opened. Compression-type crimping anchor, characterized in that more installed.

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