WO2017104908A1

WO2017104908A1 - Internal fixture for distributed composite ground anchor

Info

Publication number: WO2017104908A1
Application number: PCT/KR2016/004276
Authority: WO
Inventors: 신상희; 우제윤
Original assignee: 한국건설기술연구원; 주식회사 삼우기초기술
Priority date: 2015-12-18
Filing date: 2016-04-25
Publication date: 2017-06-22
Also published as: KR101839100B1; KR20170073404A

Abstract

An internal fixture for a distributed composite ground anchor according to the present invention is configured such that a wedge body with which a tensile member is engaged, and a traction body for retracting the wedge body are inserted into a main body; a top cap is fastened to an upper end of the main body; an elastic body is interposed between the traction body and the top cap to prevent the upper end of the tensile member from hitting the inside of the top cap when the tensile force of the tensile member is removed; and a wedge separating film is interposed between the wedge body and the main body to prevent the wedge body from being adhered to the main body.

Description

Internal Fixture for Distributed Composite Ground Anchors

The present invention relates to an internal fixing body for a distributed composite ground anchor, and more particularly, to relieve the impact caused when the wedge assembly is retracted by reaction force when releasing the fixing of the tension member fixed to the earth wall strip side, and at the same time, the wedge An internal fixture for a distributed composite ground anchor comprising a separator to facilitate separation between the assembly and the fixture.

In general, the reinforcement fixing device installed on the soft ground includes an earth anchoring device, and the soil may collapse due to rain or other causes in places such as an earthen portion or a cut slope. In order to prevent this, it refers to a fixing device which is installed to be embedded by being generally punched perpendicular to the ground.

The conventional fixing device herein means is divided into a permanent fixing device and a removable fixing device. The permanent fixing device does not remove the installed tension material, and the removable fixing device removes and recovers the installed tension material again.

Permanent fixing device is a removable fixing device that removes the tension material after the installation of the fixing device is installed because the fixing device is installed to extend to the neighboring land owned by other remains can cause problems.

Looking at the construction of the removable fixing device, the earth fixing device is inserted into the drilling hole formed by drilling the ground, and the mortar-type grout is filled in the drilling hole to solidify.

However, such a general earth fixing device has a problem that the wedge assembly and the fixing body are adhered to each other when the fixed material installed and fixed inside the earth fixing device is removed, and thus the tension material is not easily removed.

In addition, when the tensile force of the tension member is removed to remove the tension member, the front end of the tension member inserted into the fixture retreats to the rear end, thereby causing damage to the fixture.

In addition, since the wedge of the wedge assembly is not restored to the original position (upper part of the main body) in which the wedge assembly can fix the tension member, there is a problem that it is impossible to re-tension the tension member again.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an internal fixing unit for a distributed composite ground anchor which is easy to detach and reposition a tension member.

Another object of the present invention is to minimize the damage caused by the reaction force transmitted to the inside of the fixing device when cutting the tension material to minimize the internal damage of the fixing device.

According to an aspect of the present invention, in the internal fixing body of at least two or more composite ground anchors having a permanent anchor friction material attached to the tip of the internal fixing body for the tension member-removable ground anchor, a hollow is formed therein and a tension member at one end thereof. The main body is inserted; A wedge body inserted into the hollow of the main body and the tip end of the tension member bite; A towing body connected to the second stage of the wedge body and to pull the wedge body in a direction opposite to the main body when the tension member is separated; It is preferable to include an upper cap screwed with the main body, one end of the friction material is connected to one end; and an elastic body interposed between the traction body and the upper cap.

The internal fixing body for the distributed composite ground anchor of the present invention preferably further includes a wedge separation membrane interposed between the wedge body and the main body.

The wedge separation membrane of the present invention includes an extension portion formed to correspond to the stepped portion formed on the inner circumferential surface of the main body, and an insertion portion that is bent in a vertical direction around the extension portion and inserted into the insertion groove inside the stepped portion formed on the inner circumferential surface of the upper end of the main body. It is preferable to include.

The upper cap of the present invention preferably includes a lower chamber for the movement of the wedge body and the traction body, and an insertion chamber for screwing the upper end of the traction body.

The traction body of the present invention preferably includes a first chamber formed in a direction corresponding to the insertion chamber, and the elastic body is interposed between the first chamber and the insertion chamber.

According to another aspect of the invention, at least two or more of the tension member removal type ground anchors connected in a step, comprising: a friction material embedded in the ground; It is preferable to include a tension member to be removed after construction; and the internal fixing body connecting the friction material and the tension member.

It is preferable that the tension member of the present invention include a bubbling structure at the stop.

According to the present invention, the wedge body may be prevented from adhering to the main body by the wedge separator when the tension member is detached, and the internal damage of the fixing apparatus may be minimized by minimizing the impact caused by the reaction force transmitted inside the fixing device when the tension force of the tension member is removed. It can be effective.

1 is a view showing a distributed composite ground anchor including an internal fixture for a distributed composite ground anchor according to the present invention;

Figure 2 is a view showing a preferred embodiment of the internal fixing for the distributed composite ground anchor according to the present invention.

3 is an exploded view of FIG.

4 is a view showing another embodiment of the wedge separation membrane of the inner fixing body for the distributed composite ground anchor according to the present invention.

5a to 5c are views showing the removal state of the tension member of the inner fixing body for the distributed composite ground anchor according to the present invention in sequence.

An inner fixing body of at least two or more composite ground anchors having a permanent anchor friction material attached to a tip of an inner fixing body for a tension removing member ground anchor of the present invention, comprising: a body having a hollow formed therein and a tension member inserted into one end thereof; A wedge body inserted into the hollow of the main body and the tip end of the tension member bite; A towing body connected to the second stage of the wedge body and to pull the wedge body in a direction opposite to the main body when the tension member is separated; It is preferable to include an upper cap screwed with the main body, one end of the friction material is connected to one end; and an elastic body interposed between the traction body and the upper cap.

Description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as limited by the embodiments described in the text. That is, since the embodiments may be variously modified and may have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, the objects or effects presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprise" or "have" refer to a feature, number, step, operation, component, part, or feature thereof. It is to be understood that the combination is intended to be present and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

In each step, an identification code (e.g., a, b, c, etc.) is used for convenience of description, and the identification code does not describe the order of the steps, and each step clearly indicates a specific order in context. Unless stated otherwise, they may occur out of the order noted. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a view showing a ground anchor is provided with an internal fixing for the distributed composite ground anchor according to the present invention, Figure 2 is a cross-sectional view showing the internal fixing for the distributed composite ground anchor according to the present invention, Figure 3 2 is an exploded view, and FIG. 4 is a view showing another embodiment of a separator of the internal fixing body for the distributed composite ground anchor according to the present invention, and FIGS. 5A to 5B show the internal fixing for the distributed composite ground anchor according to the present invention. Figure showing the process of removing the tension member of the sieve sequentially.

First, as shown in FIG. 1, the internal fixing body 100 for the distributed composite ground anchor according to the present invention is integrally formed with the friction material 30 in the tension member 20 of the tension member removing ground anchor 10. As a result, a stepped arrangement is possible by sequentially forming a step in the length of the plurality of complex ground anchors.

In the tension member removal type ground anchor 10, the inner fixing body 100 of the present invention is connected to the front end of the tension member 20, and the friction material 30 is connected to the front end of the inner fixing body 100. After the tensile force is applied to the tension member 20, only the friction material 30 and the internal fixing body 100 remain, and only the tension material 20 is drawn and removed.

A plurality of tension members 20 of the tension member removal ground anchor 10 are constructed by being connected to each other by a connecting member 40, and a bulging structure 50 for improving the frictional force with the ground when the tension members 20 are stopped. ) May be included.

The bulging structure 50 may maximize the frictional force with the surrounding ground by expanding the interruption portion of the tension member 20 by inflating the interruption of the tension member 20 formed by twisting a plurality of strands. Although the bubbling structure 50 has been described as being formed in the tension member 20 in the present invention, it may be formed in the friction material 30 as a matter of course.

In the tension member removing ground anchor 10, the tension member 20 and the friction material 30 may be connected to each other by the internal fixing member 100 for the distributed composite ground anchor according to the present invention.

2 and 3 show a preferred embodiment of the internal fixer 100 for a distributed composite ground anchor according to the invention. As shown, the inner fixing body 100 for a distributed composite ground anchor of the present invention includes a main body 110 in which a hollow is formed and a tension member 20 is inserted into one end thereof; Wedge body 120 is inserted into the hollow of the main body 110 and the tip of the tension member 20 is bitten; A towing body 140 connected to one end of the wedge body 120 to pull the wedge body 120 in a direction opposite to the body 110 when the tension member 20 is separated; An upper cap 150 connected to the main body 110 and to which one end of the friction material 30 is connected; An elastic body 160 is interposed between the traction body 140 and the upper cap 150.

The main body 110 is a substantially cylindrical or rectangular member in which a hollow 111 is formed inside the upper and lower surfaces thereof, and the tension member 20 penetrates and fixes the hollow 111. The hollow 111 inside the main body 110 has a tapered surface 111s that is narrower in width toward the lower side with reference to FIGS. 2 and 3, and the wedge body 120 is seated on the tapered surface 111s. do.

A cap connecting surface 111c for connecting the upper cap 150 is formed at the upper end of the hollow 111 of the main body 110, and a stepped step 111t is formed between the cap connecting surface 111c and the tapered surface 111s. Is formed. A screw thread is formed on the cap connecting surface 111c and is configured to engage with a threaded portion 151s formed on the upper cap 140.

The wedge body 120 is formed in the hollow 111 of the main body 110 to be narrowed toward the bottom, and the wedge body 120 is easily separated between the wedge body 120 and the main body 110. The wedge separation membrane 130 is provided.

The wedge separation membrane 130 is to prevent the wedge body 120 from being caught inside the main body 110 by the tensile force of the tension member 20, and may be made of a non-tacky flexible material such as a fan-shaped synthetic resin film. A lubricating agent may be further applied to the inner and outer surfaces of the wedge separation membrane 130 to facilitate separation.

The wedge body 120 is a member for biting and fixing one end of the tension member 20, and includes a wedge body 121 and a plurality of divided wedge pieces 122 extending from the wedge body 121. Threads are formed on the inner circumferential surfaces of the plurality of wedge pieces 122 to prevent slippage with one end of the tension member 20.

The wedge body 121 is also formed inside the hollow, one end of the tension member 20 through the hollow. On the upper end of the outer circumferential surface of the wedge body 121, the first ring groove 123 recessed inwardly from the outer circumferential surface from the upper side to the lower side, and the second ring groove 124 formed recessed inward on the inner circumferential surface of the wedge body 121; A third ring groove 125 recessed inward from the outer circumferential surface of the wedge body 121 and a fourth ring groove 126 recessed inward from the inner circumferential surface of the wedge body 121 are formed.

The hollow body of the wedge body 121 is inserted into the pull body 140 to pull the wedge body 120 in the opposite direction to the body 110 when the tension member 20 is separated. Traction body 140 is formed to correspond to the hollow of the wedge body 121.

The tow body 140 is a substantially cylindrical member, the first chamber 141 for the elastic body 160 is inserted in the upper portion, the second chamber 142 for inserting the tip of the tension member 20 is inserted in the lower portion Is formed. In addition, a threaded portion 143 is formed on the upper outer circumferential surface of the traction body 140 to be engaged with the thread of the upper cap 150.

In addition, a flange portion 144 protruding outward is formed at the outer circumferential surface of the traction body 140, and the flange portion 144 is inserted into the second ring groove 124 of the wedge body 121.

Meanwhile, a first ring, a third ring, and a fourth ring are interposed between the traction body 140, the wedge body 120, and the upper cap 150, which will be described in more detail below.

The upper cap 150 is fitted to the upper end of the main body 110 in a state in which the wedge body 120 and the traction body 140 are inserted into the main body 110. The upper cap 150 is a member for connecting the main body 110 and the friction material 30 to each other.

A lower chamber 151 opened in a lower surface direction is formed at a lower portion of the upper cap 150, and a threaded portion 151 s is formed at an outer surface of the lower end of the lower chamber 151. The screw portion 151s meshes with a screw thread formed on the cap connecting surface 111c.

An insertion chamber 152 further recessed in the upper direction is formed at the center of the upper surface of the lower chamber 151. An upper end portion of the towing body 140 may be inserted into the insertion chamber 152. A thread is also formed on the inner circumferential surface of the insertion chamber 152 and may be configured to engage with the threaded portion 143 formed on the outer circumferential surface of the towing body 140.

Meanwhile, an upper chamber 153 recessed downward is formed on the upper surface of the upper cap 150. One end of the friction material 30 is inserted into the upper chamber 153, and one end of the friction material 30 may be fixed by the pressing sleeve 154 inside the upper chamber 153. Preferably, the upper chamber 153 and the insertion chamber 152 do not communicate with each other.

An elastic body 160 is inserted between the inner upper surface of the insertion chamber 152 of the upper cap 150 and the first chamber 141 of the towing body 140. When the elastic body 160 releases the tensile force of the tension member 20, the elastic body 160 serves to add an elastic force so that the upper end of the traction body 140 does not strike the upper cap 150 by the reaction.

Due to the above configuration, the upper cap 150, the main body 110, the towing body 140, and the wedge body 120 are integrally coupled, between the upper cap 150 and the wedge body 120 The first ring R1 is opened, the third ring R3 is interposed between the main body 110 and the wedge body 120, and the fourth ring R4 is provided between the tow body 140 and the wedge body 120. ) Is posted.

The first ring R1 is seated in the first ring groove 123 of the wedge body 120 and is interposed between the upper cap 150 and the wedge body 120. The third ring R3 is seated in the third ring groove 125 of the wedge body 120 and is interposed between the main body 110 and the wedge body 120. The fourth ring R4 is seated in the fourth ring groove 126 of the wedge body 120 and is interposed between the wedge body 120 and the towing body 140.

On the other hand, Figure 4 shows another embodiment of the wedge separation membrane 130 of the present invention. As shown, an extension portion 131 is formed at the upper end of the wedge separation membrane 130 to correspond to the stepped step 111t formed on the upper inner circumferential surface of the main body 110, and bent downward around the extension portion 131. The insertion part 132 is formed.

The insertion part 132 may be inserted into the insertion groove 111p formed inside the stepped portion 111t of the main body 110 to fix the wedge separation membrane 130 so as not to move. This is to prevent the wedge separation membrane 130 from functioning as the separation membrane is torn or damaged when the tensile force 20 is applied to the wedge body 120 while the tension member 20 is bitten.

The internal fixing body for the distributed composite ground anchor according to the present invention configured as described above inserts the distributed composite ground angle into the anchor hole by constructing an anchor hole in a state in which the tension member 20 and the friction member 30 are connected to both ends. After the grout material is filled and mounted, the tension material is formed in the tension material 20 to be fixed to the earth wall to perform the necessary work, and then the tension material 20 is removed.

5a to 5c sequentially illustrate a method for removing a distributed composite ground anchor comprising an internal fixture for a distributed composite ground anchor according to the present invention.

First, as shown in FIG. 5A, when the tension member 20 fixed by the wedge body 120 of the internal fixing body 100 is tensioned, the wedge piece is pulled toward the main body 110 while the wedge body 120 is pulled toward the main body 110. As the 122 moves along the tapered surface 111s, the tension member 20 is strongly bited. At this time, the upper end of the traction body 140 connected to the wedge body 120 is almost separated from the insertion chamber 152 of the upper cap 150.

After fixing the necessary construction in the state in which the tension member 20 is tensioned as shown in FIG. 5A, the fixing applied to the tension member 20 is released. When the anchoring member 20 is released, the same reaction force as the tensile force is applied to the tension member 20 as shown in FIG. 5B so that the wedge body 120 that is biting the tension member 20 may bounce in the direction of the upper cap 150. At this time, the tow body 140 connected to the wedge body 120 is inserted into the insertion chamber 152 of the upper cap 150.

At this time, since the elastic body 160 interposed between the traction body 140 and the insertion chamber 152 generates a repulsive force, the traction body 140 may prevent the shock from being applied to the upper cap 150. .

As described above, when the tension member 20 is rotated in the state where the tension member 20 is removed, the wedge body 120 and the tow body 140 which are held by the tension member 20 rotate integrally, and the inside of the insertion chamber 152 is rotated. The gap between the wedge pieces 122 of the wedge body 120 is increased and the fixing force with the tension member 20 is released. By the above process, the tension member 20 can be easily separated from the internal fixing body 100.

Although described above with reference to the preferred embodiment of the present application, those skilled in the art various modifications and changes to the present application without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims

In the internal fixing body of at least two or more composite ground anchors, wherein the friction material for permanent anchor is attached to the tip of the internal fixing body for the tension removing type ground anchor,

A hollow is formed inside, the body is inserted into the tension member at one end;

A wedge body inserted into the hollow of the main body and the tip end of the tension member bite;

A towing body connected to the second stage of the wedge body and to pull the wedge body in a direction opposite to the main body when the tension member is separated;

An upper cap screwed with the main body, one end of the friction material is connected to one end; And

An elastic body interposed between the traction body and the upper cap;

Internal fixture for decentralized complex ground anchors.
The method of claim 1,

Further comprising a wedge separation membrane interposed between the wedge body and the main body

Internal fixture for decentralized complex ground anchors.
The method of claim 2,

The wedge separator

An extension part formed to correspond to a step formed on an inner circumferential surface of the upper end of the main body;

The insert is bent in the vertical direction in the circumference of the extension, including an insertion portion inserted into the insertion groove of the inner step formed on the inner peripheral surface of the upper end of the main body

Internal fixture for decentralized complex ground anchors.
The method of claim 1,

The upper cap is

A lower chamber for moving the wedge body and the towing body;

It includes an insertion chamber for screwing the upper end of the traction body

Internal fixture for decentralized complex ground anchors.
The method of claim 4, wherein

The towing body is

A first chamber formed in a direction corresponding to the insertion chamber,

The elastic body is interposed between the first chamber and the insertion chamber

Internal fixture for decentralized complex ground anchors.
A tension member-removable ground anchor in which at least two or more are cascaded,

Friction material embedded in the ground;

Tension member removed after construction; and

An internal fixing body according to any one of claims 1 to 5, which connects the friction material and the tension member.

Distributed compound ground anchors with internal fixture for distributed compound ground anchors.
The method of claim 6,

The tension member

Including the bubbling structure on the suspension

Distributed compound ground anchors with internal fixture for distributed compound ground anchors.