KR20150050845A - Structure of Permanent Anchor - Google Patents

Abstract

The present invention is a permanent anchor used for preventing the collapse of a cutting surface of a rock, a cutting area of underground and the like or the collapse of an excavated ground surface when various kinds of earth works are conducted. More specifically, ends of connection parts of mounting wings are fixed at a mounting head part while making a radial arrangement shape, to which an end of a tensile member of the permanent anchor is fixed. An inner tensile member where the mounting wings are positioned covers and fixes a packer having fixed both ends, and a grout injection pipe is inserted inside of the packer. Accordingly, the packer is expanded due to grout injected through the grout injection pipe, and while the mounting wings are extended and spread out due to the expansion force of the packer, the mounting wings dig deeply inside an anchor hole to be fixedly mounted. As the mounting wings, which are directly extended, are fixed to the mounting head part, an entire weight of the permanent anchor may be lighter so that the permanent anchor may be constructed, carried, and treated in a much convenient manner. Also, thanks to a simple structure of the permanent anchor, the permanent anchor may be manufactured conveniently, the prime cost may be reduced, and mass production may be also possible, thereby providing such an economical effect. The packer, the mounting wings, and the mounting head part, which are integrally coupled, are mounted within the anchor hole so that there is an effect to make mounting space become longer. Therefore, the mounting force respective to the anchor hole is increased, and tensile stress and shearing stress are maximized. Also, resistance force respective to bending moment is improved, and enough tensile force may be made even in the case of ground with bad conditions, such as poor ground.

Description

{Structure of Permanent Anchor} having a packer-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent anchor used for prevention of disintegration of a cut surface of a rock or a ground or prevention of collapse of an excavation wall during various civil works, and more particularly to a permanent anchor A method for manufacturing a fixing device, comprising the steps of fixing a tip of a fixing blade in a radial direction, fixing a packer to a inner tensile material in which the fixing blade is located, inserting a grout pipe into the inside of the packer, To a permanent anchor having a packer-expanding fixation wing that allows the fixation head to be firmly fixed within the anchor hole through expansion of the packer and expansion of the fixation wing.

In general, permanent anchors are used to prevent earthquake and slope stability, slope restraint, prevention of injury by underground water of large structures such as buildings or dams, prevention of injury of underground structures, It is used to prevent collapse of excavation wall during underground construction work.

In addition, it is possible to prevent the movement of structures and distortions during construction of buildings such as earthquake sites and large steel towers and retaining walls, and to construct concrete for reaction force of cantilever and pressurization aid for caisson for underwater construction .

1, an anchor hole 100 is pierced by using a perforator in rocks and grounds where collapse is likely to occur, and the grout hose 110 is pierced through the anchor hole 100, A permanent anchor provided with a plurality of tensile members 120 and a tip anchor head unit 130 as one unit is inserted.

A grout (typically a cement milk grout) is injected through the grout hose 110 inserted into the anchor hole 100, and the grout injected with the anchor head part 130 for a predetermined period of time The cushioning means 140 is fastened to the other end of the tensile material 120 exposed to the incision surface and then the tensile material 120 in the stranded wire is strongly pulled by using a separate hydraulic equipment or the like, Stabilizing is a common permanent anchor construction method.

In addition, a permanent anchor made to resist the tensile stress, the shear stress and the bending moment through the preceding fixation to the anchor head portion of the anchor head before the grout injection hardening is formed in the construction of the permanent anchor included in the ankyo The permanent anchor of such an improved structure is the same as that of Korean Patent Laid-Open No. 10-2009-0113436.

2, the conventional permanent anchor as shown in FIG. 2 includes a fixing fixture having radially extending wings 131 and 131 'on one side of the leading anchor fixing head 130, The anchor head 133 and the extended wings 131 and 131 'are formed in the anchor head 133. The anchor head 133 and the wings 131 and 131' The ends of the extension wings 131 and 131 'extend outwardly from the anchor holes 100 and the ends of the extension wings 131 and 131' The tensile material 120 is pulled up from the anchor hole 100 due to a predetermined tensile force applied to the tensile material 120. As a result, That can be uniformly positioned in the center of the interior of , Will be the leading end of the fixing anchor head also directing the characteristics that can be solid, it is possible to maintain a stable fixing state against the more rigid tensile stress and shearing stress and bending moments in the anchor hole.

However, in the conventional permanent anchor as described above, the fixing anchor having an enlarged wing portion is formed separately from the front anchor head portion, so that the permanent anchor itself has a problem that the weight of the permanent anchor itself is very heavy, And it is very difficult to carry and store and manufacture.

Particularly, since the extended blade portion of the electric fixing fixture expands by using the interference with the head fixing anchor head portion, a separate pulling means or pneumatic or hydraulic means for the head fixing anchor head portion must be additionally applied, When the expansion wing portion can not be smoothly expanded or expanded, it has a closed end which is not firmly fixed to the anchor head portion of the anchor head by the extended wing portion.

Further, it is true that the existing wing portion is not formed in a direction that can cause an effective supporting force with respect to the anchor hole, but has a direction that can be slipped off from the tensile force, so that the substantial fixing force is considerably weak.

That is, when the extending wing portion is extended outwardly to maintain the inclination angle, the inclined direction of the extended wing portion should maintain the inclined angle in the extended form along the direction in which the leading end fixing anchor head portion is to be drawn. However, The anchoring direction of the anchors has an extended inclination angle in a direction opposite to the drawing direction of the anchor head portion, and when the force to escape from the anchor head portion of the anchor is applied, the expanded wing portion acts as a force to be reduced, .

Therefore, the existing wing portion can be effectively used at the time of initial fixing to the anchor head portion of the front end. However, if the tension is applied to the anchor head portion before the grout is cured or before the grout injection, Which is not effective and firmly established.

In addition, since the tip fixing anchor head and the fixing fixture are separated from each other and thus the integrity of each other is low, the tip fixing anchor head portion is fixed in a state in which the ground is fragile or when the preliminary tension or tension is applied, As a result, it has a structural contradiction that the resistance to tensile stress and shear stress and bending moment is inevitably lowered.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a method and apparatus for fixing an end of a tension member of a permanent anchor in a fixation head portion radially fixed to an end portion of a fixation wing, and the grout injection tube is inserted into the inner side of the packer. Due to the grout injected through the grout injection tube, the fixing blade expands due to the expansion of the packer and the expansion force of the packer, And the inner surface of the ball is fixedly fixed by digging,

The packer and the fixing blade and the fixing head are solidly fixed in the anchor hole with the grout integrated, and the tensile stress, the shear stress and the resistance against the bending moment are improved due to the firm and stable fixing force. It is an object of the present invention to provide a permanent anchor having an expandable fixation wing.

According to an aspect of the present invention, there is provided a permanent anchor for fixing and anchoring an inner side of an anchor hole of a perforated ground, wherein a fixing head is coupled to an end of a plurality of tension lines, A plurality of fixing vanes are fixedly formed on the inner side of the fixing blade, and a packer having both ends fixed by a tensile line is coupled to the inner side of the fixing blade, and a grout injection tube having an end positioned inside the packer is inserted between the tensile lines .

The present invention relates to a fixing anchoring device for fixing an anchoring fixation blade directly to a fixing head, thereby making it possible to reduce the weight of the permanent anchors as a whole, thereby providing excellent construction, transportation and handling convenience. It is very economical because it can be mass-produced with the cost reduction, and the fixing length is increased by fixing the packer, the fixing wing and the fixing head in an integrated state with the integrated wing integrated in the anchor hole, The tensile stress and the shear stress are maximized and the resistance against the bending moment is improved so that a sufficient tensile force can be produced even when the ground is not as good as the soft ground.

Fig. 1 is an overall view of a state in which a conventional permanent anchor is installed
Fig. 2 is an enlarged view of the construction of the tip anchor head portion of the conventional permanent anchor
Figure 3 is an overall view of a permanent anchor according to the present invention.
4 is an enlarged perspective view of a fixing head portion of a permanent anchor according to the present invention.
5 is an enlarged perspective view of a fixing head portion of a permanent anchor according to the present invention.
6 is an exploded perspective view of the fixing head portion of the permanent anchor according to the present invention.
FIG. 7 is a view showing the construction of a permanent anchor according to the present invention in a state where it is inserted into an anchor hole
8 is a view showing a state in which the grout is injected into the packer of the permanent anchor according to the present invention
9 is an enlarged state diagram of a permanent anchor according to the present invention,
10 is a view showing a state in which grout is injected into the fixing head portion of the permanent anchor according to the present invention
11 is a perspective view of an alternative anchorage wing of a permanent anchor according to the present invention
12 is a view showing another embodiment of the fixing blade of the permanent anchor according to the present invention
13 is a perspective view of another embodiment of the grout pipe of the permanent anchor according to the present invention
Fig. 14 is an enlarged perspective view of the main part to which the grout extension outlet according to Fig. 13 is applied

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

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

FIG. 3 is an overall view of a permanent anchor according to the present invention, FIG. 4 is an enlarged perspective view of a fixing head of a permanent anchor according to the present invention, FIG. FIG. 6 is an exploded perspective view of a fixing head of a permanent anchor according to the present invention. FIG.

As shown in the drawing, the permanent anchor according to the present invention is provided with a plurality of tensile lines 10 and 10 'in which a plurality of stranded wires are inserted in a twisted manner in a cladding tube, and the tensile wires 10 and 10' The fixing head 20 is fixed to one end of the tension lines 10 and 10 'and is fixed to the other end of the tension lines 10 and 10', if necessary.

In the permanent anchor having such a structure, in the present invention, as a means for maximizing the fixing force of the fixing head unit 20 and simplifying the structure of the permanent anchor, the fixing head unit 20, as described above, And a separate packer 30 is attached to the tensile wires 10 and 10 'corresponding to the inside of the fixing vanes 21 and 21' as described above. So that both ends of the packer 30 are bundled or fixed.

The fixing vanes 21 and 21 'may be fixed to the fixing head 20 in a radially split manner through the connecting block 22 from one end of the fixing head 20 while maintaining the same or similar outer diameter as the fixing head 20' The connecting rod 22 may be formed separately from the fixing blades 21 and 21 'and may be integrally formed with the fixing blades 21 and 21' and the connecting rod 22 as described above. It might be.

Accordingly, as the plurality of fixing wings 21 and 21 'are fixed to the outer surface of one end of the fixing head 20 using the connecting rod 22, the fixing wings 21 and 21' And can be formed spaced apart from the fixing head portion 20 by the connecting rod 22.

The packer 30 is manufactured in the same shape as a bag that is opened at both ends using a stretchable fiber material so that the expanding force of the packer 30 can be expanded more than the inner diameter of the anchor hole 100 So that the packer 30 is positioned inside the fixing vanes 21 and 21 'while the packer 30 is inserted along the tension lines 10 and 10' (For example, a wire or a cable tie, a rope, a band, or the like) in such a manner that both ends of the packer 30 are positioned in the fixing vanes 21 and 21 ' .

At this time, a separate grout injection pipe 40 is inserted into the tension lines 10 and 10 'so that the end of the grout injection pipe 40 is located inside the electric packer 30 A cement milk grout is injected into the grouting pipe 40 of the permanent anchor according to the present invention in a state in which it is inserted into an anchor hole 100 formed in a cutout or a cut surface, 40 so that the grout can be filled into the inside of the packer 30.

In particular, the fixing vanes 21 and 21 'are fixedly coupled to the outer surface of one side of the fixing head 20 by using the connecting block 22. The fixing vanes 21 and 21' An insertion groove 24 having a depth and a width equal to the width and thickness of the linking bar 22 is formed and the linking bar 22 is firmly fixed to the fixing head 20 through another fastening bolt 26 And,

A plurality of through holes 23 are formed in the end of the connecting rod 22. The insertion hole 24 in which the connecting rod 22 is placed is provided with a screw hole 25 And the connecting rod 22 as described above can be securely fixed to the fixing head 20 by using the fastening bolts 26. [

Since the connecting rod 22 mounted in this manner does not protrude at all from the surface of the fixing head 20, the insertion of the permanent anchor of the present invention into the anchor hole 100 provides a smoother and smoother insertion .

In addition, the fixing blades 21 and 21 'having the above-described fastening structure can be changed and applied in various sizes and lengths depending on the depth of the anchor hole 100 or the nature of the ground, The fixing vanes 21 and 21 'may be relatively large and relatively large when the fixing force of the fixing blade 20 is required to be large. On the other hand, in the case of the fixing paper which does not require a high fixing force, By replacing the fixing wings 21 and 21 'having a small size, it is possible to realize not only convenience in construction but also cost reduction.

7, a permanent anchor according to an embodiment of the present invention is inserted into an anchor hole 100 formed in a cutout or a cutout surface, 8, the grout 101 is injected by using the grout injection pipe 40 exposed to the outside as shown in FIG. 8, and the grout is injected through the lower end of the grout injection pipe 40 into the packer 30, respectively.

As the grout is filled into the inside of the packer 30 as described above, the packer 30 gradually expands and the expanding force of the packer 30 is transmitted to the fixing blades 21 and 21 ' And the packer 30 are brought into contact with each other to push the fixing blades 21 and 21 'toward the inner surface of the anchor hole 100 in the outward direction.

In this case, the fixing blades 21 and 21 'are relatively easily expanded and deployed by the connection block 22 having a relatively thin width. As the expansion force of the packer 30 is increased, The ends of the anchor holes 21 and 21 'are pierced at a predetermined depth on the ground surface while digging the inner surface of the anchor hole 100.

When the fixation wings 21 and 21 'are fixed to the fixing head 20 while digging the inner surface of the anchor hole 100 as described above, the tension lines 10 ', Tensile is applied to the permanent anchor, and due to the tensile force applied to the tensile wires 10 and 10', each of the tensile wires 10 and 10 ' As shown in Fig.

10, the grout 101 is injected and introduced into the anchor hole 100 through the inlet of the grout injection pipe 40 and the anchor hole 100, As the grout tightly filled in the anchor hole 100 is completely cured, reinforcement of the incision and cleft can be effectively performed.

In the present invention, as the means for increasing the fixing force of the fixing vanes 21 and 21 'to the anchor holes 100 as shown in FIG. 11, the fixing vanes 21 and 21' When the expanding force of the packer 30 acts on the fixing blades 21 and 21 'having the incision 50 as described above, the zigzag- The middle part of the fixing wings 21 and 21 'corresponding to the opposite end portions of the improvement 50 will be bent and the fixing wing 21 and the fixing wing 21' (51) and (51 ') protruding from each other are formed on the outer sides of the first and second base plates (21) and (21').

Such an insertion needles 51 and 51 'are formed by digging the inner surface of the anchor hole 100 more deeply in the expansion and expansion process of the fixing wings 21 and 21' And the grout is filled up to the inner depth of the anchor hole 100 which is pierced by the fixing wings 21 and 21 'along the cut-through 50 where the grout is penetrated when the grout is injected. So that a better binding force and fixing force can be secured.

As another embodiment, as shown in FIG. 12, a plurality of outward protruding pieces 52 and 52 'due to perforation lines and bending are formed on the fixed fingers 21 and 21' The protruding pieces 52 and 52 'are formed at one side of the packing 52' so as to penetrate the fixing wings 21 and 21 'vertically. The protruding pieces 52 and 52' The protrusions 52 and 52 'are deeply inserted into the inner surface of the anchor hole 100 while the fixing wings 21 and 21' are expanded and expanded by the expansion force of the fixing wings 21 and 21 ' The fixation force of the entire fixation head portion 20 including the fixation head portion 20 is further improved.

In addition, since the grout is introduced into the perforations 53 formed by bending the projecting pieces 52 and 52 ', the grout is filled up to the inner corner of the anchor hole 100, And tensile stress and shear stress can be ensured.

In the present invention, in order to shorten the filling time of the grout flowing into the interior of the packer 30 through the grout injection pipe 40, another extended outlet 41 is provided as shown in FIGS. 13 and 14, Which is connected to the end of the grout injection pipe 40,

The enlarged discharge port 41 has a larger outer diameter than the outer diameter of the grout injection pipe 40. The enlarged discharge port 41 is formed on the side surface and one surface of the extended discharge port 41 in a state of being in communication with the inside of the grout injection pipe 40 A plurality of discharge holes 42 and 42 'are formed.

The extended discharge port 41 is tightly fastened to the grout injection pipe 40 through a binding method such as a screw or a fixing band. When the extended discharge port 41 is coupled When the grout injection pipe 40 of the expansion pipe 40 is disposed between the plurality of tension lines 10 and 10 ' The tensile wires 10 and 10 'at the portion where the wire 10 is located are formed in a bulging shape.

As a result, the tensile wires 10 and 10 'at the portion where the extended discharge port 41 is located bulge and the gap between the tensile wires 10 and 10' becomes larger. Therefore, When the grout is to be filled in the packer 30 through the injection pipe 40, the grout can be quickly diffused and filled through the gap between the tension lines 10 and 10 ' The four discharge holes 42 and 42 'formed in the same extended discharge port 41 allow the inflation injection to be performed at a high speed with respect to the packer 30 while rapidly and uniformly diffusing and discharging the grout to be injected.

Accordingly, the permanent anchor of the present invention is anchored in the anchor hole with the packer, the fixing blade and the fixing head integrally formed, so that the fixation length of the anchor hole is increased and the tensile stress and shear stress are increased And the resistance against bending moment is improved, so that it is possible to produce a sufficient tensile force even in a case where the ground is not as good as the soft ground.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

10, 10 ': tensile line
20: Fixing head part 21, 21 ': Fixing blade
22: connecting rod 23: fastening hole
24: insertion groove 25:
26: fastening bolt
30: Packer
40: grout injection pipe 41: extended outlet
42, 42 ': Emitter
50: Improvement of section 51, 51 ': Insertion
52, 52 ': projecting piece 53:
100: anchor ball 101: grout

Claims (7)

A permanent anchor in which a fixing head part (20) is coupled to an end of a plurality of tension lines (10, 10 ') and is inserted and fixed inside an anchor hole (100) of a perforated ground,
A plurality of fixing wings 21 and 21 'are formed radially in the fixing head 20 and the fixing wings 21 and 21' are fitted to the inner side of the fixing wings 21 and 21 ' And a grout injection pipe 40 having an end positioned inside the packer 30 is inserted and inserted between the tension lines 10 and 10 ' Wherein the permanent anchor has a packer-extended fixation wing.
The method according to claim 1,
Wherein the fixing wings (21) and (21 ') are configured to be spaced apart from the fixing head (20) by a connecting rod (22).
3. The method of claim 2,
A through hole 23 is formed in the connecting rod 22 of the fixing blades 21 and 21 'and an insertion slot 24 is formed in the outer surface of the fixing head 20, Lt; / RTI >
A screw hole 25 is formed in the insertion groove 24 so as to correspond to the fastening hole 23 of the connecting rod 22 so that the end of the connecting rod 22 inserted in the insertion hole 24 is connected to another fastening bolt 26 , And is fixed in a non-protruding manner from the outer surface of the fixing head (20).
The method according to claim 1,
The packer (30) is made of a stretchable fiber material, and the packer (30) expanded by filling the grout in the packer (30) is expanded to be larger than the inner diameter of the anchor hole (100) With a permanent anchor.
The method according to claim 1,
The zigzag-shaped incision 50 is formed in the fixing wings 21 and 21 'so that the fixing wings 21 and 21' are extended to the incision 50 during the expansion of the fixing wings 21 and 21 ' The insertion wedge portions 51 and 51 'generated by the incision reduction 50 are staggered with each other in the fixing wings 21 and 21' that are bent and the intermediate portions of the fixing wings 21 and 21 ' Wherein the anchors are configured to protrude from the anchors.
The method according to claim 1,
A plurality of protruding pieces 52 and 52 'are bent outwardly from the fixing wings 21 and 21' and protruding pieces 52 and 52 'are formed on one side of the protruding pieces 52 and 52' And a corresponding penetrating portion (53) is formed on the outer peripheral surface of the fixed anchor.
The method according to claim 1,
A separate extension outlet (41) is formed at the end of the grout injection pipe (40)
The extended discharge port 41 is configured to have an outer diameter larger than the outer diameter of the injection pipe 40. The extended discharge port 41 is provided with four discharge holes 42 and 42 'communicating with the inside of the injection pipe 40, ) Of the fixed anchoring vane (10).

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