KR20090019189A

KR20090019189A - A extension anchor

Info

Publication number: KR20090019189A
Application number: KR1020070083439A
Authority: KR
Inventors: 김규철
Original assignee: (주) 신풍컨설턴트
Priority date: 2007-08-20
Filing date: 2007-08-20
Publication date: 2009-02-25

Abstract

An extension anchor is provided that the tensile force is gained at anchorage without grouting work. An extension anchor comprises a fixing head(20) of the conical shape having taper, a successive jaw is formed on the inner surface, a division wedge(30) having a plurality of hooking elements protruded in exterior, one or more fixing rings(40) which covers the division wedge and positioned at the circumference of the fixing head, one or more tensile members(50) in which one end is connected to the fixing head, a support head(60) which is connected to the other end of the tensile member and is supported in the inlet of the perforation hole(2).

Description

Anchor Anchor

The present invention relates to an expandable anchor, and more particularly, to an expandable anchor capable of receiving a tensile force without grouting to a fixing unit, shortening air, and allowing construction of a small drilling hole to reduce construction costs. It is about.

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 using a punching machine on the ground where there is a risk of collapse, and after cleaning the punching hole using air, the grout hose, a plurality of tension members, and a load-bearing body are used. After preparing and inserting into the unit, the first grout is injected through the grout hose, and when the injected grout is cured with the inner body, the fastener is fastened to the other end of the tension member and the tension member in the strand is hydraulic equipment. Tensile is used to obtain a constant load, then the second grout is used to cure, and then the tensile material is tensioned to the design load, and then fixed to the pressure plate and the support head 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.

At this time, the anchor should be firmly secured to the ground, and the tension should be reliable. In addition, a simple structure can reduce the production cost, and construction can be shortened to reduce the construction cost.

However, in the case of the conventional wedge anchors, the structure of the fixing head part is complicated, and the bearing pressure is weak, so that the load is large due to the large production, and thus, the installation is difficult, thereby increasing the assembly cost and manufacturing cost, thereby increasing the work cost.

In addition, the portion seated in the drilling hole is made of the surface contact is less reliable for securing the fixing force in the drilling hole.

In addition, if the perforation hole is large, it is necessary to manufacture or process the mold separately, thereby increasing the cost of construction by increasing the material management more than necessary.

Therefore, the present invention was devised in view of the above-described drawbacks, and it is possible to receive a tensile force without grouting work on the fixing part, and to shorten the air because it can take the necessary tensile force only by the first grouting, and install the wedge simply. The purpose of the present invention is to provide an expandable anchor that can reduce the construction cost by allowing the construction of small holes to obtain the required tensile force.

Specific means of the present invention for achieving the above object,

In the anchor constructed in the drilling hole,

A conical fixing head 20 having a taper;

Split wedges having a plurality of locking elements 32 protruding on the outer surface of the fixing head 20 are coupled to the same taper and divided into a plurality of partitions are formed in a continuous locking jaw 31 formed on the inner surface 30;

One or more fixing rings (40) surrounding the split wedge (30) and positioned around the fixing head (20);

At least one tension member 50 having one end connected to the fixing head 20;

A support head 60 connected to the other end of the tension member 30 and supported at the inlet side of the drilling hole 2;

When the fixing head 20 is pushed into the membrane of the drilling hole, it is characterized in that it comprises an expansion means for expanding the split wedge 30 in the radial direction at the same time as the axial direction.

Also according to the invention,

The expansion means includes a cylindrical pressure transducer 500 positioned rearward of the fixing head 20 to be axially movable;

One end is connected to the hitting hammer 202, and the other end is characterized in that configured in the split wedge (30).

Also according to the invention,

The expansion means may include: a hammer 202 and a stop head 204 respectively positioned in front and rear of the fixing head 20; Including the hammer guide 206, one end is connected to the hammer 202 and the other end is connected to the stop head 204 by inserting the fixing head 20,

After inserting the anchor in the drilling hole and spraying air, grouting liquid or hydraulic flow to the grouting hose, the piston 530 located in the cylinder pushes the hammer 202 in the radial direction and the hammer 202 is the head 20 Strike the splicing wedge 30 attached to the) is characterized in that it is configured to open in the radial direction of the drilling hole.

Also according to the invention,

Fixing heads 20 and 20 arranged uniaxially with a tapered cone;

It is coupled to the outer peripheral surface of each of the fixing head (20, 20) by the same taper is divided into a plurality of arranged, forming a continuous locking jaw (33, 33) on the inner surface and a plurality of locking elements 32 protruding on the outer surface Splitting wedges (30, 30) having a;

One or more fixing rings (40, 40) for wrapping the split wedges (30, 30) respectively and placing them around the fixing head (20, 20);

At least one tension member (50, 50) connected to one end of each of the fixing heads (20, 20);

A support head 60 connected to the other ends of the tension members 50 and 50 and supported at the inlet side of the drilling hole 2;

When the fixing head (20, 20) is pushed into the membrane of the drilling hole is characterized in that it comprises an expansion means for expanding the split wedge (30, 30) in the radial direction.

Preferably, the expansion means comprises: a head shaft 304 for inserting the fixing heads 20 and 20 and having a hammer 202 at one end thereof;

The wedge punches 306 and 306 are respectively fixed to the head 20 and positioned at the rear of the split wedges 30 and 30, respectively.

Therefore, the expandable anchor of the present invention has a simple structure of the fixing unit, there is no failure, excellent operation reliability, and can reduce manufacturing cost. In addition, since the grouting work can be finished as a primary part after checking the tensile force, construction cost can be reduced. In addition, the fixing force is excellent, it is possible to increase the reliability of the tensile force.

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

First Embodiment

1 is a configuration diagram after the expansion of the expansion anchor according to the first embodiment of the present invention, Figure 2 is an operating configuration of the cylinder converter of Figure 1, Figure 3 is a cross-sectional view taken along line AA of Figure 1, Figure 4 It is a perspective view of the split wedge applied to 1.

1 to 4, a conical fixing head 20 having a taper is provided. On the outer circumferential surface of the fixing head 20 is divided into a plurality of split wedge 30 is coupled to the mounting head 20 by the same taper. In this embodiment, the split wedge 30 has a plurality of locking elements 32 protruding from the outer surface to form a continuous locking step 33 on the inner surface as four.

The split wedge 30 is disposed on the circumference of the fixing head 20 and the cylindrical pressure transducer 500 by two fixing rings 40. At this time, the fixing ring 40 is preferably made of a rubber material having an elastic restoring force or may be configured in the form of a coil spring.

One end of at least one tension member 50 is connected to the fixing head 20, and the support head 60 is connected to the other end of the tension member 30 via a pressure plate 62 supported at the inlet side of the drilling hole 2. ) Is connected.

When the fixing head 20 is pushed into the membrane of the drilling hole is provided with expansion means for expanding the split wedge 30 in the radial direction.

In the first embodiment, the expansion means includes a cylindrical pressure transducer 500 positioned rearward of the fixing head 20 so as to be axially movable, and one end of which is connected to the blow hammer 202, and the other end thereof. It is configured to include the split wedge (30).

The cylinder pressure converter 500 may be made of plastic (PVC) or steel, the piston may be made of rubber, plastic, steel in consideration of the pressure leakage or load.

At this time, the hammer 202 is inserted to be movable in the fixing head 20 direction.

The operation of the first embodiment configured as described above will be described.

First, as shown in Figure 1, the anchor is pushed into the hole (2). At this time, the split wedge 30 is fixed to the fixing head 20 and the stopper with a rubber ring or spring having a good elasticity.

After that, the assembled anchor body is pushed to the end of the drilled hole. When the insertion of the anchor hole into the boring hole 2 is completed, when the air or grouting liquid is discharged to the grouting hose H in the assembled anchor body, the piston 530 mounted in the cylinder 520 hits the hammer 202. The thrust hammer 202 pushes the split wedge 30 fixed to the head 20.

Therefore, the split wedge 30 extends in the radial direction, respectively, via the cylinder 520 and is engaged with the inner wall and the head of the drilling hole 2 to be fixed. At this time, the fixing ring 40 is opened together and at the same time the protruding engaging element 32 of the split wedge 30 is embedded in the inner wall of the drilling hole 2 to increase the fixing force.

At the same time, the split wedge 30 is pushed forward to move, and as a result, the tip circumference of the split wedge 30 is strongly caught by the locking jaw 33 and the head of the split wedge 30, so that the greater the tensile force, the greater the force. Function so that the head does not fall out or the wedge does not come off.

Next, when the tensile force value designed by applying tension to the tension member 30 comes out, after the grouting operation is carried out, the grouting solution is cured, and then the supporting head 60 secures the pressure through the pressure plate 62. It is supported by the inlet side of the hole 2. After that, the anchor cap 70 is covered with the support head 60 to complete the anchor work.

As described above, the expandable anchor 10 of the first embodiment has a simple structure of a fixing part including a cylinder pressure converting device 500 and a split wedge 30, which is highly reliable in operation and requires no special expertise for installation. The human rights cost of the workforce can be reduced.

In addition, since the grouting operation is shortened in the fixing unit, the air may be shortened.

Second Embodiment

A second embodiment of the present invention is shown in FIGS. 4 and 5. In FIG. 4 and FIG. 5, the same or equivalent parts as those shown in FIG. 1 will be described with the same reference numerals.

The second embodiment is characterized by applying the expansion means in the first embodiment.

At this time, the taper direction in which the fixing head 20 and the split wedge 30 are in contact is the same as in the first embodiment.

And the hammer guide 206 is inserted into the fixing head 20, one end is connected to the hitting hammer 202 and the other end is connected to the rear stop head 204.

That is, the second embodiment is characterized by having the front hammer 202 and the stop head 204 at both ends of the hammer guide 206 to extend the split wedge 30 by the tapering force.

Therefore, in the state as shown in Figure 4 the anchor head 204 is pushed to reach the inner surface of the drilling hole (2).

When the tension member 50 is pulled instantaneously in this state, the stop head 204 is attracted to the tension member 50 in a fixed state so that the fixing head 20 hits the impact hammer 202 forward. As a result, the split wedge 30 is opened in the radial direction and fixed to the drilling hole as shown in FIG. 5.

In this case, since the component force is greatly generated in proportion to the tensile force at the tapered surface where the fixing head 20 and the split wedge 30 are in contact with each other, the fixing force is secured without grouting to the fixing unit.

Third Embodiment

The third embodiment of the present invention shows that by using two fixing units as shown in FIGS. 6 and 7, the fixing force is doubled, and in addition to the above-described advantages, a large tensile force can be obtained even when the drilling hole is made small. 7 shows an exploded perspective view of either fixing unit.

As shown in FIG. 6, fixation heads 20 and 20 arranged in a uniaxial manner with a tapered cone are provided.

On the outer circumferential surface of each of the fixing heads 20 and 20, split wedges 30 and 30 divided into a plurality of tapered parts are arranged. On the inner surface of the split wedges (30, 30-1) is formed a continuous locking jaw (33, 33) as shown in Figure 7 and has a plurality of locking elements (32, 32) protruding on the outer surface.

One or more fixing rings 40 and 40 respectively surrounding the split wedges 30 and 30 and positioned around the fixing heads 20 and 20, and one or more tension members each of which is connected to one end of the fixing heads 20 and 20. 50 and 50 are provided.

The other end of the tension member (50, 50) is connected to the support head 60 is supported by the pressure plate 62 at the inlet side of the drilling hole (2).

When the fixing head (20, 20) is pushed into the membrane of the drilling hole is provided with expansion means for expanding the split wedge (30, 30) in the radial direction.

The expansion means is inserted into the fixing head (20, 20) and has a head (304) having a striking head 302 at one end, respectively fixed to the head shaft (304) of the split wedge (30, 30) It comprises a wedge punch 306, 306, respectively located in the rear.

Therefore, after loading the anchor 10C of the third embodiment into the punching hole 2 as shown in FIG. 6, the head 302 is pushed to be hit by the inner end of the punching hole 2 and the wire at the hole inlet is hammered or punched. Hit using equipment.

In this case, the fixing heads 20 and 20 simultaneously extend the splitting wedges 30 and 30 in the radial direction. At this time, the retraction movement of the split wedges 30 and 30 is suppressed by the wedge punches 306 and 306.

That is, the wedge punches 306 and 306 generate a force for punching the split wedges 30 and 30, and the split wedges 30 and 30 are tapered to open, and the split wedges 30 and 30 are caused by this opening force. ) Is fixed to the drilling hole (2).

At this time, since the fixing force is generated in both split wedges (30, 30), the fixing force is twice that of the fixing force is obtained compared to the configuration of one fixing unit can exhibit sufficient tensile force in the state without grouting.

Therefore, the expandable anchor of the present invention is suitable for preventing stabilization and stabilization of ground, buildings, slopes, and the like, and in particular, the structure of the fixing unit is simple, there is no failure, excellent operation reliability, and a short construction period, thereby reducing manufacturing costs. can do. In addition, since the tensile force can be obtained only by the first grouting work on the fixing unit after checking the tensile force, construction cost can be reduced. In addition, the fixing force is excellent, it is possible to increase the reliability of the tensile force.

1 is a configuration diagram after the expansion of the expandable anchor according to the first embodiment of the present invention,

2 is a configuration diagram of the cylindrical converter of FIG.

3 is a cross-sectional view taken along the line A-A of FIG.

Figure 4 is a perspective view of the split wedge applied to Figure 1,

5 and 6 is a state diagram before and after the expansion of the expandable anchor according to a second embodiment of the present invention,

7 is an operation state after expansion of the expandable anchor according to a third embodiment of the present invention,

8 is an exploded perspective view of one fixing unit in FIG. 7;

20: fixing head

30: split wedge

40: retaining ring

50: tension member

202: blow hammer

204: stop head

206: Hammer Guide

302: hitting head

304: head shaft

306: head punch

500: grouting and cylinder compression hose

520: cylinder

530: piston

550: rubber gasket

Claims

In the anchor constructed in the drilling hole,

A conical fixing head 20 having a taper;

At least one tension member 50 having one end connected to the fixing head 20;

When the fixing head 20 is pushed into the membrane of the drilling hole expansion anchor, characterized in that it comprises an expansion means for expanding the split wedge 30 in the radial direction at the same time as the axial direction.

The method of claim 1, wherein the expansion means

A cylinder device 520 and a piston type compression device 550 positioned behind the fixing head 20 to be axially movable;

One end is connected to the grouting hose (H) and the fixing head (20), and the other end is an extended anchor, characterized in that it comprises a split wedge (30) connected in a cylindrical shape to the fixing head (20).

The method of claim 1,

Expanding anchor, characterized in that configured to be opened in the radial direction of the punching hole hitting the split wedge 30 by pulling the tension member after loading the anchor in the drilling hole.

Fixing heads 20 and 20 arranged uniaxially with a tapered cone;

When the fixing head (20, 20) is pushed into the membrane of the drilling hole expansion anchor, characterized in that it comprises an expansion means for expanding the split wedge (30, 30) in the radial direction.

The method of claim 4, wherein the expansion means

A head shaft 304 for inserting the fixing heads 20 and 20 and having a striking head 302 at one end thereof;

The wedge punches (306, 306) are fixed to the head shaft (304), respectively located on the rear of the split wedge (30, 30), characterized in that it comprises an extended anchor.