KR20140029675A

KR20140029675A - Earth anchor apparatus with integrated anchor cap

Info

Publication number: KR20140029675A
Application number: KR1020120094899A
Authority: KR
Inventors: 박정식
Original assignee: 박정식
Priority date: 2012-08-29
Filing date: 2012-08-29
Publication date: 2014-03-11

Abstract

The present invention relates to an earth anchor structure with an integrated anchor cap and, more specifically, to an earth anchor structure with integrated anchor cap capable of reducing working hours for installing an earth anchor and production costs of an anchor cap by mass-producing a standardized product by integrating an anchor cap having a grouting material introducing part and an expansion-connection part, and reducing working hours and the entire construction costs by not using a separate fixing member for preventing a damage due to the shake of a corrugated pipe and preventing water from separately introduced by tightly screwing and coupling the corrugated pipe to the expansion-connection part of the integrated anchor cap. The earth anchor structure used for mounting the ground of a civil engineering or building structure by being inserted and installed to a drilled hole of an excavated slope comprises: an integrated anchor cap which includes a hollow grouting material introducing unit installed and inserted into the drilled hole and having an introducing port to introduce a grouting material thereinto and which includes an expansion-connection unit integrally formed in the grouting material introducing unit expanded to form a thread; a corrugated pipe screwed and coupled to the expansion-connection unit of the integrated anchor cap; a supporting member installed in an inlet of the drilled hole and having multiple wedge installing holes for penetrating a PC steel wire; and a division wedge installed in the wedge installing hole of the supporting member and fixing and supporting the outer periphery edge of the PC steel wire penetrating the supporting member by pressing the outer periphery edges.

Description

EARTH ANCHOR APPARATUS WITH INTEGRATED ANCHOR CAP}

The present invention relates to an earth anchor structure having an integrated anchor cap, and more specifically, by integrating an anchor cap composed of a grouting material inlet and an expansion pipe connecting portion to reduce the manufacturing cost of the earth anchor by mass-producing a standardized product. The corrugated pipe is screwed into the expansion pipe of the integrated anchor cap so that it does not come loose.It prevents the inflow of water and prevents damage due to the fluctuation of the corrugated pipe. It relates to an earth anchor structure having an integral anchor cap to reduce the cost.

In general, when the civil works of industrial complexes such as residential complexes, industrial complexes, railways, highways, tunnels, artificial steep slopes are created due to natural slopes or excavation.

Naturally and artificially formed slopes are exposed to the risk of cutting and collapse due to various factors such as earth pressure, wind pressure, water pressure, and earthquake.

Therefore, various ground and slope reinforcement methods, such as soil nailing, rock bolting, and ground anchors, are also used to prevent cutting and collapse of the slope.

Among them, the ground method, namely the earth anchor method, is used not only as a ground reinforcement but also as a reinforcement for supporting structures such as building bridges.In detail, a hole is drilled into the retaining wall to insert reinforcing bars or PC steel wire, and then grouting mortar. It is a method of fastening the retaining wall by making anchors on the back, and drilling the earthen wall with earth drill instead of the brace, and inserting a reinforcing material such as reinforcing bars or PC steel wire in it, grouting it around with mortar, and hardening it. An earthen membrane is used to fix steel wires or rebars by applying tensile force.

The ground anchor (ground anchor) means a nail that is put on the ground like the description, and it has the effect of tying the ground and the structure into one aggregate. In general, the earth anchor structure is used in various ways such as support for temporary mound walls, reinforcement of dams, buoyancy anchors of underground structures, slope reinforcement, and the part that contributes to settlement by grout is called a settlement site, and the other parts are free. It is called the chapter.

As shown in FIG. 5, the conventional earth anchor is screwed to the tip contact part 2 of the steel material inserted into the boring hole of the ground and the tip contact part 2, but the fixing material, such as cement, is fixed thereto. A hollow steel sleeve 4 having a predetermined length having a reflow hole 3 formed therein, screwed into the steel sleeve 4, and an expansion hole 5 in the expanded state and coupled to the expansion hole 5 And a fixing cone 7 and a wedge 8 for supporting the corrugated transmission pipe 6 and the PC steel wire which is installed at the inlet side of the perforation hole and is introduced into the corrugated transmission pipe 6 and the expansion port 5. It is composed.

However, in the conventional earth anchor as described above, the front contact portion 2, the steel sleeve 4, and the expansion port 5 are made of individual parts, so that the manufacturing time of the earth anchor is increased due to the direct coupling of the respective parts. It's happening.

Then, the expansion tube 5 is expanded to fit the size of the waveform transmission tube 6, even if the skilled person during manual expansion operation is expanded to fit the diameter of the waveform transmission tube 6 There is a problem that is quite difficult to be coupled to the wave transmission tube to the expansion hole (5), by using a separate heat shrink rubber to prevent the inflow of water into the expansion hole.

In addition, even when the waveform transmission tube 6 and the expansion tube 5 are combined using the heat shrink rubber 9, the waveform transmission tube 6 has a smaller diameter than that of the expansion tube 5 so that the earth After anchor installation or ground anchor installation, the corrugation of the corrugated wave transmission pipe causes damage of the heat shrink rubber or the corrugation wave of the wave, and water is introduced through the broken portion to promote corrosion of the PC steel wire. Is happening.

The present invention was devised in view of the above situation, and an object of the present invention is to integrate the anchor cap composed of the grouting material inlet and the expansion connection to mass produce a standardized product so as to reduce the manufacturing cost of the earth anchor. There is.

In addition, the corrugated pipe is screwed to fit snugly in the expansion pipe connecting portion of the integrated anchor cap to prevent water inflow into the integrated anchor cap and to prevent damage of the corrugated pipe itself due to the fluctuation of the corrugated pipe.

In addition, the outer periphery of the integral anchor cap or corrugated pipe includes a water-expandable index member on the inner threaded portion of the expansion connection portion as well as a circular water repellent wall formed at the inlet of the grouting material, so that the water in the ground flows into the integrated anchor cap. To prevent it.

And, by installing an impact relief member at one end of the grouting material inlet portion to mitigate the impact delivered to the integral anchor cap when the earth anchor is installed.

The present invention for achieving the above object is installed in the drilling hole of the cut surface is used in the ground anchor structure used to fix the ground of civil engineering or building structure, is installed to be inserted into the inner side of the drilling hole grouting material is introduced into the inside An integral anchor cap formed of a hollow grouting material inlet formed with an inlet to be formed integrally with the grouting material inlet and having an expansion connection in a state in which a screw thread is formed; Corrugated pipe screwed into the expansion pipe connecting portion of the integrated anchor cap; A support cone installed at the inlet side of the drilling hole, the support cone having a plurality of wedge installation holes for penetration of the PC steel wire; And a split wedge installed in the wedge mounting hole of the support cone to press and fix the outer circumference of the PC steel wire passing through the support cone.

In addition, when one side end of the grouting material inlet impacts the inner bottom surface of the drilling hole, an impact mitigating member is installed at one side end of the grouting material inlet so as to mitigate the impact caused by the collision to the integrated anchor cap. The inner diameter of the expansion pipe and the outer diameter of the corrugated pipe are configured to have the same diameter, so that the corrugated pipe is loosely screwed to the expansion pipe.

In addition, a water-expandable index member is applied to the inner thread of the expansion pipe portion so as to prevent moisture in the ground from flowing along the outer circumference of the corrugated pipe and into the expansion pipe portion, and the grouting material of the integrated anchor cap is introduced. The portion is formed to protrude outward from the outer periphery of the grouting material inlet, and the water barrier wall prevents water from flowing into the coupling portion of the integral anchor cap and the corrugated pipe through the outer periphery, starting from the end of the grouting material inlet. Is formed, and a water-expansion index material is applied to the order wall.

According to the present invention, the anchor cap consisting of the grouting material inlet and the expansion connection unit is integrally formed as described above, so that a standardized product can be produced in large quantities, thereby reducing the manufacturing cost of the earth anchor.

In addition, since the corrugated pipe is screwed into the expansion pipe connecting portion of the integrated anchor cap without being loose, it is possible to prevent the breakage of the integrated anchor cap and the corrugated pipe due to water inflow into the integrated anchor cap or the fluctuation of the corrugated pipe.

In addition, the water-expandable index member is applied to the inner thread portion of the expansion joint to which the outer periphery or corrugated pipe of the integrated anchor cap is coupled, and a water-order wall is formed at the inlet of the grouting material to prevent water from entering the interior of the integrated anchor cap. You can do it.

In addition, the shock absorbing member is installed at one end of the grouting material inlet, so that the impact caused by the collision with the ground when the earth anchor is installed can be alleviated.

1 is a state diagram showing a state of the earth anchor structure having an integrated anchor cap according to the present invention,
Figure 2 is a state diagram showing a separated state of the earth anchor structure having an integrated anchor cap according to the present invention,
Figure 3 is a side view showing a state in which the water expansion index material is applied to the order wall of the integral anchor cap according to the present invention,
Figure 4 is a state diagram showing the separation state of the split wedge according to the earth anchor structure having an integrated anchor cap of the present invention,
Figure 5 is a side view showing a state of the conventional earth anchor.

Hereinafter, with reference to the accompanying drawings will be described in detail the earth anchor structure having an integrated anchor cap according to the present invention. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the following description of the present invention, it is to be understood that the terminology used herein is for the purpose of describing the exemplary embodiments of the present invention and is not intended to limit the scope of the present invention. May be exaggerated for clarity and convenience of explanation, and the embodiments described in the present specification and the constitutions shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention It is to be understood that various equivalents and modifications may be substituted for those at the time of the present application.

1 is a state diagram showing a state of the earth anchor structure having an integrated anchor cap according to the present invention, Figure 2 is a state diagram showing a separated state of the earth anchor structure having an integrated anchor cap according to the present invention, Figure 3 is a present invention Figure 4 is a side view showing a state in which the index material is applied to the order wall of the integral anchor cap according to, Figure 4 is a state diagram showing the separation state of the split wedge according to the earth anchor structure having an integrated anchor cap of the present invention.

Earth anchor structure having an integral anchor cap according to the invention is installed to be inserted into the drilling hole of the cut surface, the anchor anchor structure used to fix the ground of civil engineering or building structure, integral anchor cap connected to the inside of the drilling hole 10, a corrugated pipe 20, a support cone 30, and a split wedge 40 are configured.

Looking at the one-piece anchor cup, the one-piece anchor cap 10 is installed to be inserted into the inner hole of the hole, but the grouting material inlet portion 11 and the grouting material inlet (13) formed so that the grouting material flows inwardly It is formed integrally with the inlet portion 11, but consists of an expansion connection portion 15 of the expanded state to form a screw thread.

That is, the one-piece anchor cap 10 is integrally manufactured by iron casting or plastic molding by standardization, the grouting material inlet portion 11 is a grouting material introduced into the inner side of the drilling hole in a cylindrical body of a predetermined length At least one inlet is formed on the outer periphery so as to be introduced into the anchor cap.

In addition, the expansion pipe connecting portion 15 is a hollow type pipe is formed so that the thread is formed in a state connected integrally to the end of the grouting material inlet portion 11, the screw thread is to allow the corrugated pipe to be described later to be screwed .

In addition, the inner diameter of the expansion pipe 15 and the outer diameter of the corrugated pipe 20 is configured to have the same diameter, so that the corrugated pipe 20 is coupled so as not to loosely fit when screwed to the expansion pipe 15. To do this.

At this time, a water-expandable index member is applied to the inner thread of the expansion pipe connecting portion 15, which is the moisture in the ground flows along the outer circumference of the corrugated pipe 20 by the capillary phenomenon while the earth anchor structure is installed in the drilling hole This is to prevent the corroded PC steel wire which is introduced into the expansion pipe connecting portion 15 through the screw coupling portion of the expansion pipe connecting portion 15 and the corrugated pipe 20.

Then, taping may be performed as necessary on the connection portion between the expansion connecting portion 15 and the corrugated pipe 20.

By manufacturing the integrated anchor cap 10 composed of the grouting material inlet 11 and the expansion connection portion 15 as described above, it is possible to mass-produce the standardized product, thereby lowering the manufacturing cost. do.

When the corrugated pipe 20 in the normalized state is screwed into the expansion pipe connecting part 15, the coil is properly fitted, so that the work is essentially wound using heat shrink rubber so that moisture does not enter the coupling part where the corrugated pipe is loosely coupled as in the prior art. There is no need to perform.

In addition, since the corrugated pipe in the normalized state is screwed to fit the expansion pipe fitting portion is loosely coupled to the expansion pipe connecting portion as in the prior art, the problem that the corrugated pipe is rubbed by the expansion pipe connecting portion when the corrugated pipe is rocked and broken does not occur.

In addition, the integrated anchor cap 10 is introduced into one side end of the grouting material inlet 11 so that the one end of the grouting material inlet 11 collides with the inner bottom surface of the drilling hole. An impact mitigating member 50 is provided to mitigate that the impact caused by the collision is transmitted to the integrated anchor cap 10.

That is, after drilling a hole with a predetermined length toward the rear surface from the inside of the retaining wall using a perforator, the grouting material inlet 11 of the integrated anchor cap 10 in the process of pushing the integrated anchor cap into the inner side of the drilling hole ) The end collides with the inner bottom surface of the perforation hole, and the impact is transmitted to the whole anchor cap and may cause damage or breakage to the integrated anchor cap, so that the impact is applied to one end of the grouting material inlet 11. Install the relief member 50 to mitigate the impact.

In addition, the grouting material inlet 11 of the integrated anchor cap 10 is formed to protrude outward from the outer periphery of the grouting material inlet 11 so that the moisture in the ground is caused by the capillary phenomenon. Starting with the end of (11), an order wall 18 is formed to prevent the flow of the integral anchor cap 10 and the corrugated pipe 20 into the coupling portion through an outer circumference, and the order index 18 has a water expansion index. Ash 19 is applied.

That is, the order wall 18 is formed in a circular shape along the outer circumference of the grouting material inlet portion 11 of the integral anchor cap 10 so that the moisture in the ground along the integral anchor cap 10 is corrugated pipe 20 This is to prevent the flow to the coupling part with).

The shock absorbing member is formed in the integral anchor cap of the present invention as described above to prevent the integral anchor cap from being broken when the earth anchor is installed, and to the inner thread of the expansion connection portion 15 to which the corrugated pipe is screwed. The water-expandable index member is applied, and the order wall 18 is formed at the grouting material inlet 11, and the water-expansion index member 19 is applied to the order wall 18 to prevent water from being introduced into the integrated anchor cap. You can do it.

Here, the reason why it is important to prevent the inflow of water into the integral anchor cap 10, it is important that the civil structure is stable once in a long time after construction, it is installed for the stability of such important civil structure Earth anchors must also remain intact for long periods of time.

However, when the PC steel wire located inside the integrated anchor cap 10 is exposed to moisture or exposed to corrosion, the PC steel wire is corroded, thereby causing breakage of the PC steel wire can cause the collapse of civil engineering structures can cause large accidents will be.

Therefore, the present invention is configured to prevent the water in the ground from being introduced into the integrated anchor cap repeatedly while the integrated anchor cap is made by a simple structure.

The corrugated pipe 20 is to be loosely screwed to the expansion connection portion 15 of the integrated anchor cap 10, the corrugated pipe 20 will be preferred to use the standard in general.

And, the support cone 30 is installed at the inlet side of the drilling hole is formed with a plurality of wedge mounting holes 31 for the penetration of the PC steel wire, the split wedge 40 is the wedge of the support cone 30 It is installed in the installation hole 31 is to press and support the outer periphery of the PC steel wire passing through the support cone (30).

That is, the support cone 30 is at least two or more wedge mounting holes 31 are formed of a disc-shaped steel material having a predetermined thickness, and the split wedge 40 is formed in the wedge mounting holes 31. It is inserted while pressing the outer circumference of the PC steel wire penetrating the support cone 30.

Here, looking at the split wedge 40, the split wedge 40 is three divided pieces 41, as shown in Figure 4, the elastic member is installed on the outer peripheral side of the divided piece 41 It consists of (45), the outer periphery and the inner periphery of the three divided pieces 41 are connected through the elastic member 45 through the elastic member 45 through which the through-hole 48 through which the PC steel wire is formed is formed. will be.

At this time, the inner periphery of the divided piece 41 is formed with a plurality of protruding jaw 43 to securely fix the outer periphery of the PC steel wire from one side in the longitudinal direction to the other side.

Although the three divided pieces 41 are interconnected through the elastic member 45 to form one split wedge 40, the two divided pieces are interconnected through the elastic member to form one split wedge. 40 may be configured to achieve, the elastic member 45 may be a rubber ring or coil spring.

In addition, the side surface of the split wedge 40 is formed in the shape of the upper and lower strait that the outer diameter gradually decreases from one side in the longitudinal direction to the other direction, the wedge mounting hole 31 formed in the support cone 30 also The inner diameter of the divided wedge 40 is formed to have a shape of the upper and lower narrow narrowing gradually decreases.

Forming the outer diameter of the split wedge 40 and the inner diameter of the wedge mounting hole 31 in the shape of the upper and lower narrowing of the wedge mounting hole 31 in a state in which the split wedge 40 is installed to be bitten by the PC steel wire In order to allow the split wedge 40 to be firmly fixed to the PC steel wire when the inside is pulled in.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be < RTI ID = 0.0 > appreciated by one of ordinary skill in the art, that various changes and modifications may be made without departing from the scope of the invention. Therefore, the scope of the present invention is not limited to the above-described embodiments, but should be determined by equivalents to the claims, as well as the following claims.

10: one-piece anchor cap 11: grouting material inlet
13: inlet port 15: expansion connection
18: order wall 19: water-expansion index material
20: corrugated pipe 30: support cone
31: Wedge Installer 40: Split Wedge
41: divided piece 43: protruding jaw
45: elastic member 48: through hole
50: shock absorbing member

Claims

In the earth anchor structure is installed to be inserted into the drilling hole of the cut surface used to fix the ground of civil engineering or building structure,
An integrated anchor cap which is installed to be inserted into the inner side of the perforation hole but is formed integrally with the hollow grouting material inlet formed with an inlet so that the grouting material is introduced into the inside and the grouting material inlet with the expansion connection in a state where the screw thread is formed. ;
Corrugated pipe screwed into the expansion pipe connecting portion of the integrated anchor cap;
A support cone installed at the inlet side of the drilling hole, the support cone having a plurality of wedge installation holes for penetration of the PC steel wire;
Earth wedge structure having an integrated anchor cap, characterized in that it comprises a; wedge is installed in the wedge mounting hole of the support cone is divided wedge for pressing and supporting the outer periphery of the PC steel wire passing through the support cone.

The method of claim 1,
When one side end of the grouting material inlet impacts the inner bottom surface of the punching hole, an impact mitigating member is installed at one side end of the grouting material inlet to mitigate the impact caused by the collision to the integral anchor cap An earth anchor structure having an integral anchor cap.

The method of claim 1,
The inner diameter of the expansion pipe portion and the outer diameter of the corrugated pipe is configured to have the same diameter so that the corrugated pipe screwed to the expansion pipe portion loosely anchor structure having an anchor cap, characterized in that the screw.

The method of claim 1,
An earth anchor having an integral anchor cap on the inner thread of the expansion pipe connection part is coated with a water expansion index member to prevent water in the ground flowing along the outer circumference of the corrugated pipe and flows into the expansion pipe connection part. Structure.

The method of claim 1,
The grouting material inlet of the integrated anchor cap is formed so as to protrude outward from the outer periphery of the grouting material inlet, and the moisture in the ground is coupled to the integral anchor cap and the corrugated pipe through the outer periphery, beginning with the end of the grouting material inlet. An earth anchor structure having an integrated anchor cap, characterized in that the order wall is formed to prevent flow into the site.

6. The method of claim 5,
An earth anchor structure having an integral anchor cap, characterized in that the water expansion index is applied to the order wall.