WO2017034152A1

WO2017034152A1 - Front mounting anchor for permanent anchor method, having improved structure

Info

Publication number: WO2017034152A1
Application number: PCT/KR2016/007360
Authority: WO
Inventors: 차경회
Original assignee: 주식회사 화랑기초; 차경회
Priority date: 2015-08-27
Filing date: 2016-07-07
Publication date: 2017-03-02
Also published as: EP3135821A1; KR101605028B1; TR201807752T4; EP3135821B1; CN106498944A

Abstract

The present invention relates to a permanent anchor to be used for preventing the collapse of a cut slope at a cutting area of a rock, the ground or the like, or for preventing the collapse of an excavated wall during various public works and, more specifically, comprises: a steel wire fixing part for fixing and coupling tension wires; and a mounting head part extended and deployed by grout injection pressure, such that the mounting head part is coupled to the lower end of the steel wire fixing part, wherein the mounting head part comprises: a moving body operated by the grout injection pressure; and a plurality of anchor wings extended and deployed by the pressure of the moving body. Therefore, since: a front mounting anchor can be immediately withdrawn without interference between an inner surface of an anchor hole and the front mounting anchor when the depth of the anchor hole is insufficient in a step of embedding the front mounting anchor into the bored anchor hole, the front mounting anchor can be embedded again after a re-boring operation is performed, such that operation correction can be simply carried out; the embedded front mounting anchor is firmly embedded into and fixed to the inner wall of the anchor hole while the anchor wings are extended and deployed by the discharge pressure of grout, the fixing force of the front mounting anchor and the mounting force due to the grout are greatly improved such that a peripheral part can be efficiently reinforced by the permanent anchor; and voids, joints or the like in the grout at the front end of the anchor hole is not generated, high-quality construction can be performed.

Description

Tip anchoring anchor for permanent anchor construction with improved construction

The present invention relates to a permanent anchor used for preventing the collapse of the incision surface in the rock or ground cutout, or to prevent the collapse of the excavation wall during various civil works, more specifically anchor of the tip anchoring anchor for performing the permanent anchor method Fixing force of the tip anchoring anchor by allowing the blade to expand and develop by the injection pressure of the grout and to close the grout to the periphery of the tip anchoring anchor and the anchor hole due to the continuous ejection action of the grout after the expansion and expansion of the anchor blades. It is about the tip anchoring anchor for the permanent anchor construction method that can be further improved as well as a high-quality reinforcement work without fragility of the fixing unit by the joint.

In general, permanent anchors are used for earthquake construction and slope stabilization to prevent the collapse of cut surfaces in rocks and ground cutouts, prevention of injuries caused by groundwater of large structures such as landslide suppression, buildings or dams, prevention of injury of underground structures, large buildings Used to prevent the collapse of excavated walls in underground construction of civil engineering. In addition, construction for earthquake-generating buildings, large steel towers, retaining walls, etc., prevents falling and distorting structures, constructs for reaction of cantilevers, and assists in indentation of caissons for underwater construction. It is installed to do this.

In this permanent anchor method, as shown in Figure 1, generally drills the anchor hole 100 using a perforation machine, such as rock, ground, which may be collapsed, the grout hose and a plurality of tension members through the anchor hole 100 The 110 and the tip fixing anchor 130 are provided as one unit and inserted. Next, grout is injected through the grout hose 120 inserted into the anchor hole 100, and the injected grout is fixed with the tip fixing anchor 130 after a predetermined time, and then the other of the tension member 110. After installation of the acupressure means on one end to fasten the fixing device 140, and by tensioning the tension member 110 in the strand using a separate hydraulic equipment, it is a general construction method.

This conventional permanent anchor is to support the tensile force from the surface by the ground pressure of the grouting or the frictional force with the ground. In the permanent anchor method, the anchor component includes an anchor body fixing part having a function of transferring a tensile force to the ground by exerting a required stress, and a free tensile part and a required stress structure that transmits the tensile force due to the stress exerted on the anchor head. It consists of an anchor head with a role to act on. Here, the anchor fixing part is determined by the adhesion resistance of the ground and grout, the grout and the tension member.

In addition, in the construction of the permanent anchor as described above, the permanent anchor made to resist the more robust tensile stress and shear stress and bending moment through the preliminary fixing to the fixing head portion before the grout injection hardening is conceived The permanent anchor of such an improved structure is the same as that of Republic of Korea Patent Application Publication No. 10-2009-0113436.

The conventional permanent anchor is to impart a stiffness to the pull by the ground pressure of the grout, and there are a number of joints around the anchor hole in which the anchor is inserted in accordance with the condition of the ground, such as soft ground, slope, rock. It is quite difficult to check the joints in these perforated anchor holes from the outside. That is, when the grout is injected by inserting the tension member into the anchor hole, the grout is filled into the anchor hole by the injection pressure. Therefore, when the grout is injected into the anchor hole, the grout leaks from the anchor hole toward the plurality of joints formed therein, thereby lowering the grout filling rate inside the anchor hole.

In this way, the filling rate of the grout is significantly lowered due to a large number of joints in the anchor hole, thereby failing to substantially reinforce the ground. In addition, even if the joint generated in the anchor hole 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 substantial reinforcement.

Therefore, it is quite difficult to measure the strength of the filled grout in the anchor hole, and the work time is also considerably increased, which causes a problem in that an additional cost such as construction cost due to expansion of air is increased. In addition, the grout filled in the anchor hole is not able to confirm the presence of voids in the grout due to jointing, and thus performs anchor construction such as soft ground and slope reinforcement, resulting in increased maintenance costs and ground collapse due to subconstruction work. There is a problem that a large accident can occur.

In addition, the conventional permanent anchor is inconvenient to select the anchor according to each soil condition and the load is applied intensively at the anchorage of the tip of the anchor inserted into the anchor hole, structurally unstable problems are generated to drill the anchor hole deep As the length of the fixing unit inserted into the anchor hole is increased, the work time of the anchor hole for forming the depth is increased and the length of the fixing unit is increased, resulting in an increase in installation cost.

As described above, cement milk grouting, resin, and tip anchoring anchors are used in order to allow anchorage bodies of anchors, that is, anchorages, to be anchored in the ground in the anchor hole as a preliminary work for permanent anchor tensioning. However, conventional grouting and resin have a problem that curing time is required for a certain time, so that when the ground deformation inside the anchor hole is in progress or water is not properly tensioned. In addition, in the case of the existing tip anchoring anchor, if the tension is immediately performed before the grouting injection, there is a problem in that the end stress of the anchorage fixed portion is reduced from the anchor hole during tensioning, so that it is difficult to obtain the required tensile stress.

The present invention is to solve the problems as described above, consisting of a fixing line for fixing the tension line and the fixing head portion expanded by the grout injection pressure, respectively, so that the fixing head portion is coupled to the bottom of the steel fixing portion However, as the fixing head portion is composed of a fluid that is operated by the grout injection pressure and a plurality of anchor wings that are expanded and developed by the pressure of the fluid,

When the grout is injected while the anchor hole is inserted with the tip fixing anchor inward, the anchor blade expands and is firmly embedded in the inner wall of the anchor hole to further improve the fixing force. As the grout is discharged and filled into the periphery of the head part and the inside of the anchor hole, the fixing force of the fixing head part is greatly improved, and thus the tip anchoring anchor for the permanent anchor method of the improved structure having the characteristic of realizing a higher quality permanent anchor method. It is an object of the present invention to provide.

The present invention for achieving the object as described above, each of which consists of a steel wire fixing portion for fixing the tension member in the permanent anchor method, and a fixing head portion fixed to the inside of the anchor hole is coupled to the lower side of the steel wire fixing portion So that the steel fixing part and the fixing head part is fixed by the grout at the inner end of the anchor hole,

The fixing head unit, and a support rod coupled to the steel wire fixing section; A pressurized cylinder fixedly formed at the tip of the support rod; A fluid which is inserted into the inside of the pressurized cylinder through an open lower side; Composed of anchor wings radially hinged to the lower end of the support rod and interviewed the lower end of the fluid, the fluid is slid by the filling pressure of the grout injected into the pressurized cylinder and the anchor wing is expanded outward It is made to constitute.

The present invention, if the depth of the anchor hole in the process of indenting the tip anchoring anchor in the drilled anchor hole can be immediately withdrawn without interference between the anchor hole inner surface and the tip anchoring anchor, so after re-punching operation to enter again Work correction can be made easily, and the tip anchoring anchor in the indented state is firmly fixed to the anchor wall of the anchor hole as the anchor blade is expanded and developed by the discharge pressure of the grout. The fixing force is greatly improved, so that the reinforcement of the periphery by the permanent anchor can be made efficiently, and since there are no gaps or joints in the grout of the anchor hole tip, high quality construction can be achieved.

1 is an overall schematic view of a conventional permanent anchor method

2 is an overall perspective view of the tip anchoring anchor according to the present invention;

3 is an overall front view of the tip anchoring anchor according to the present invention;

4 is an exploded cross-sectional view of the tip anchoring anchor according to the present invention;

5 is a perspective view of a state in which the tension member is coupled to the tip anchoring anchor according to the present invention;

6 is a state diagram in which the tip anchoring anchor according to the present invention indents the anchor hole together with the tension member;

7 is an enlarged view of the process by the tip anchoring anchor according to the present invention, a cross-sectional view of a state where grout is started to be injected;

8 is an enlarged view of the process by the tip anchoring anchor according to the present invention, a cross-sectional view of the anchor blade is expanded due to grout injection;

Figure 9 is an enlarged view of the process by the tip anchoring anchor according to the present invention, a cross-sectional view of the grout is filled in the anchor hole due to the continuous injection of the grout

10 is a cross-sectional view of a state in which the grout is filled in the front end anchoring anchor and the peripheral portion according to the present invention;

11 is an overall view of a state in which the front end anchoring anchor according to the invention configured exclusively for rock

The terms or words used in this specification and claims are not to be construed as being limited to the common or dictionary meanings, and the inventors can appropriately define the concept of terms in order to explain their invention in the best way. Based on the principle, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

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

2 is an overall perspective view of the tip anchoring anchor according to the present invention, FIG. 3 is an overall front view of the tip anchoring anchor according to the present invention, and FIG. 4 is an exploded cross-sectional view of the tip anchoring anchor according to the present invention.

The tip anchoring anchor according to the present invention, as shown in the drawing, a fixing line 10 for fixing the tension member 110 made of a cable, and the fixing head portion 20 is connected and coupled to the lower side of the fixing line 10 Cement is injected into the anchor hole 100 in a state in which the steel wire fixing section 10 and the fixing head portion 20 is deeply inserted into the inner tip of the anchor hole 100 together with the tension member 110 As the fixing head part 20 is fixed in the anchor hole 100 by the milk grout, reinforcement of the inclined surface part may be made through tension on the tension member 110.

At this time, the steel wire fixing section 10 is the guide portion 12, 12 'formed with fitting grooves 11, 11' in four directions are formed spaced apart up and down, the lower guide portion 12 ' A winding portion 13 is formed at the bottom of the single tension member 110 so as to be wrapped and rotated and bent, and the coupling hole 14 penetrating the winding portion 14 on the side of the winding portion 14. ) Is formed.

In addition, the fixing head portion 20 is provided with a support rod 30 protruding the engaging piece 21 at the front end, the support rod 30 is fixed to the downwardly open pressure cylinder 40 is formed In addition, a separate fluid 50 is inserted into the pressure cylinder 40, and a plurality of anchors coupled to the hinge coupling part 31 of the support rod 30 is formed below the fluid 50. Wings 60 and 60 'are provided.

Here, the coupling piece 21 protrudes from the tip of the support rod 30, and the coupling piece 21 is coupled to the coupling hole 14 formed in the winding part 13 of the steel fixing part 10. In close contact with each other, the wire fixing part 10 and the fixing head part 20 are connected to each other through separate fixing pins 22.

In addition, each of the anchor blades 60 and 60 'is hinged to the hinge coupling portions 31 radially protruding from the lower ends of the support rods 30, respectively. Can be deployed in an outwardly extending form from the support rod 30.

In addition, the pressurized cylinder 40 has a downwardly open inner space, the upper surface of the pressurized cylinder 40 is formed with a connection hole 42 to communicate with the internal space is the connection hole 42 The grout injection pipe 41 is to be coupled to the upper side of the pressure cylinder 40, the circular cutting plate 44 by the upper and lower cutting grooves 43 are integrally formed. In the lower side of the inner surface of the pressurized cylinder 40, a discharge groove 45 having a concave groove is formed.

In addition, the fluid 50 is tightly inserted into the inside of the pressurized cylinder 40 and slides in the inner space of the fluid 50. The inner space of the pressurized cylinder 40 is inserted into the insert of the fluid 50. As a result, the fluid 50 is pushed outward as the pressure on the inner space of the pressure cylinder 40 is increased.

In addition, the anchor blades 60, 60 'is inclined in the interview with the fluid 50 on one side, and the inclined surface portion 61 is formed on the other side of the anchor blades 60, 60'. At the outer surface portions of the anchor blades 60, 60 ', the sharp tips 62, 62' are made in a single or plural form.

Accordingly, the support rod 30 and the pressurized cylinder 40 and the fixing head portion 20 formed by the fluid 50 and the anchor blades 60 and 60 'are formed on the lower side of the steel fixing part 10. In the state, as shown in FIG. 5, after the tension member 110 is bound and fixed by using the steel wire fixing unit 10, it is to be inserted into the anchor hole 100.

At this time, the binding fixing method of the tension member 110 with respect to the steel line fixing section 10 is the fitting grooves 11, 11 'formed in the guide portion 12, 12' of the steel line fixing section 10, respectively. After the tension member 110 is in close contact with each other by using a metal band or the like provided separately, it is to be firmly pressurized at the same time, one of these tension member 110 is a "U" letter along the lower winding portion 13 As it is bent in the form and fixed to the binding is to be able to further improve the binding fixing force between the steel wire fixing portion 10 and the tension member 110 by the tension member 110 that surrounds the wound portion (13).

In this state, the tip anchoring anchor may be inserted into the anchor hole 100 previously drilled as shown in FIG. 6, and the inner diameter of the anchor hole 100 includes the tension member 100. Since the perforations will be larger than the outer diameter of the anchor, free entry can be made in a state where mutual interference does not occur.

In addition, when the depth of drilling of the anchor hole 100 is insufficient in the indentation process of the tip anchoring anchor, it is necessary to re-drill the anchor anchor 100 after retracting the anchor anchor anchor 100. However, the conventional anchoring anchor is Since the interference with the inner wall of the anchor hole 100 is severely generated during the drawing process, the drawing work is very cumbersome, and the drawing itself has a structure that is impossible at all. This is not being done reasonably.

Thus, as in the present invention, when the tip fixing anchor is indented at the inner end of the anchor hole 100 through the process of indenting and withdrawing and re-punching the anchor hole 100, the fixing head part 20 The grout is injected into the inside of the pressurized cylinder 40 through the grout injection pipe 41 connected to the pressurized cylinder 40 of FIG. 7.

Accordingly, as the grout is filled into the pressurized cylinder 40, the fluid 50 is gradually pushed out of the pressurized cylinder 40 due to the pressure of the grout, and the fluid 50 is anchor wing 60. The anchor blades 60, 60 'which are pushed in the (60') direction and obliquely interfere with the fluid 50 are expanded and expanded outward as shown in FIG. By dipping the inner surface of the anchor hole 100 by the tip (62) (62 ') of.

The anchor blades 60, 60 'is suppressed to rotate while the inclined surface portion 61 formed on the anchor blades 60, 60' in the process of being deployed through the outward rotation and the support rod 30 At the same time the discharge groove 45 formed on the inner surface of the pressure cylinder 40 due to the discharge of the fluid 50 is in communication with the internal space of the pressure cylinder 45, the discharge groove 45 as shown in FIG. The grout inside the pressurized cylinder 40 is discharged to the outside of the pressurized cylinder 40, and the grout discharged in this way is the periphery of the anchor wings 60 and 60 'and the inside of the deep end of the anchor hole 100. Filled with.

In addition, when the grout is filled in the inner end of the anchor hole 100 including the inside of the pressurized cylinder 40 and the anchor blades 60, 60 'in the above process, the pressure for the space will be increased. Since such a rising pressure will also act inside the pressurized cylinder 40, such a pressure acts on the cutout plate 44 of the pressurized cylinder 40 while the cross-sectional fracture at the cutout groove 43 is made. ) Is to be separated or separated through the instantaneous break to the outside of the pressure cylinder (40).

Therefore, while the above cutting plate 44 is separated from the pressurizing cylinder 40, a hole is naturally formed in the upper portion of the pressurizing cylinder 40 in which the cutting plate 44 is located. To be discharged and filled.

When the close grout injection state is made in the fixing head part 20 and the grout injection in the steel fixing part 10 is completed and the grout is completely cured in this state, as shown in FIG. The steel fixing part 10 and the fixing head portion 20 may be firmly fixed and fixed within the 100, and the anchor wings 60 and 60 'of the fixing head portion 20 are extended outward. Since it is fixed by the grout in the state of digging the inner wall of the anchor hole 100, even if a strong tensile force is applied to the tension member 110, the stability is very excellent in terms of fixing fixing in the fixing section.

The tip anchoring anchor of the present invention is ideal for forming a plurality of tip portions 62, 62 'on the outer surface of the anchor blades 60, 60' in the case of the soil layer, whereas in the case of the rock layer, FIG. As shown in the drawing, the teeth 63 and 63 'are continuously formed on the outer surface of the anchor wings 60 and 60', so that the teeth 63 are extended when the anchor wings 60 and 60 'are extended outward. It is very effective that the 63 'can strongly interfere and resist the inner surface of the anchor hole 100 made of rock and prevent the fall back to the fixing head portion 40.

Therefore, the tip anchoring anchor of the present invention can be easily pulled out from the indentation state when the anchoring depth of the anchor hole 100 is to be corrected, and the indentation anchors 60 and 60 are formed by the injection pressure of the grout. ') Expands and expands in all directions while anchor wings 60 and 60' are strongly fixed to the inner end of anchor hole 100, which is made of soil layer or rock, and is further fixed. The grout will be cured while being closely filled to the inner depth of the anchor hole 100, the periphery of the fixing head portion 20, and the steel fixing section 10, so that the fixing fixing force of the tip anchoring anchor of the present invention is further improved. As it improves, slope reinforcement using permanent anchors can be carried out with higher quality.

The embodiments described in the present specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, and various equivalents and modifications that may be substituted for them are provided. It should be understood that there may be examples.

10: Kang Seongo administration

11,11 ': Fitting groove

12,12 ': Guide

13: winding unit

14: coupling hole

20: fixing head part

21: combined piece

22: fixed pin

30: support rod

31: hinge coupling portion

40: pressurized cylinder

41: grout injection tube

42: pipe connection

43: cutting groove

44: cutting plate

45: discharge groove

50: fluid

60,60 ': Anchor wing

61: inclined surface portion

62,62 ': Peak

63,63 ': Teeth

100: anchor ball

110: tension member

Claims

Composed of a fixing line 10 for fixing the tension member 110 in the permanent anchor method and the fixing head portion 20 is fixed to the inside of the anchor hole is coupled to the lower side of the steel fixing line 10 These line fixing section 10 and the fixing head portion 20 is configured to be fixed by the grout at the inner end of the anchor hole 100, the line fixing section 10 is radially fitted grooves (11) (11) on the outside ') Formed upper and lower guide parts 12 and 12' are formed, and the lower guide part 12 'is formed such that the winding part 13 extending from the fitting grooves 11 and 11' protrudes downward. To insert and bind the tension member 110 through the fitting grooves 11 and 11 ', and the winding portion 13 is bent through the winding portion 13 by a single tension member 110. The coupling hole 14 is formed at the lower side, and the fixing head portion 20 is formed by the pressure cylinder 40, the fluid 50, and the anchor wings 60, 60 '. The tip of the improved anchoring method for the permanent anchor method of the improved structure such that the fluid 50 is slid by the filling pressure of the grout injected into the pressurized cylinder 40 and the anchor blades 60, 60 'are extended to the outside. In the anchoring anchor,

The steel fixing section 10 and the fixing head portion 20 is coupled to each other by the support rod 30 in which the coupling piece and the hinge coupling part are formed, and fixed to the coupling hole of the support rod and the steel wire fixing part. The support rod 30 and the steel wire fixing part 10 are connected by fastening the pins, and the anchor blade is hinged through the hinge coupling part 31 of the support rod, and the pressure cylinder 40 supports the rod. It is fixed to the fluid 50 is positioned in the pressure cylinder is sliding in the state fitted to the support rod, the pressure cylinder 40 by forming the discharge groove 45 on the lower side of the inner surface of the pressure cylinder 40 When the fluid 50 is pushed by the grout injected into the interior of the pressurized cylinder 40, the discharge groove 45 communicates with the inside of the pressurized cylinder 40. To be discharged, the upper surface of the pressure cylinder 40 The grout injection pipe 41 is screwed to form a connection hole 42 and the cutting plate 44 by the cutting groove 43, the cutting plate 44 is injected into the inside of the pressure cylinder 40 As the pressure of the grout is increased, the cutting groove 43 is broken and the tip anchoring anchor for the permanent anchor method of the improved structure, characterized in that configured to be separated and removed to the outside of the pressure cylinder (40).
The method of claim 1,

The anchor blades 60, 60 'is one side is in close contact with the fluid 50 inclined, and the other side of the anchor blades 60, 60' by forming an inclined surface portion 61 of the fluid 50 According to the movement, the anchor blades 60 and 60 'are expanded and expanded from the support rod 30 through outward rotation, and the inclined surface portion 61 and the support rod 30 are expanded when the anchor wings 60 and 60' are expanded and deployed. The expansion deployment angle is limited by the interference of) and interlocked with the rock layer of the tip portion 62 (62 ') or the anchor hole 100 to allow the outer surface portion to dig into the soil layer of the anchor hole 100. A tip anchoring anchor for permanent anchor construction of an improved structure, characterized in that one tooth (63) (63 ') protruding.