KR20010016264A - Removable anchor systems - Google Patents

Abstract

PURPOSE: A removably anchoring device is provided to reduce costs due to the occupation of the land and to prevent environmental pollution by removing completely steel wires for tension installed in the underground. CONSTITUTION: A removably anchoring device includes a load-resistance body(6) for transferring an anchoring force, a removable anchoring tool(7) for removing steel wires for tension, an unbonded strand(3) for transferring the anchoring force, plastic fixing nut(5) and fixing plate(9) for fixing the removable anchoring to the load-resistance body, a washer(12), steel wire(4) for removing the plastic fixing nut, and a protective cap(10) for protecting the components. If the life of the anchor is ended, the plastic fixing nut is removed and the unbonded strand is cut, and thereby the protective cap is lowered. A removable anchoring tool is separated from the protective cap and a wedge(8), which fixes the steel wires, is removed.

Description

Removable anchor systems {Removable anchor systems}

The present invention is an anchor construction method used in civil engineering, in particular geotechnical engineering to install a removable anchoring device to remove the tensioning wire of the anchor at the lower end of the anchor tension steel wire buried in the ground when the function of the anchor This is to make it easy to remove them.

In general, most of the existing anchor construction method is mainly buried anchor that can not remove the tension wire, and even after the anchor function is completed, the tension wire is left in the ground as it is, the cost and civil complaints It is also generated and contaminates the ground environment. Recently, the anchor (Fig. 1) for installing and removing the tension member in the U-shape has been developed and applied, but due to the bent portion of the tensile steel wire, the efficiency is reduced and the tension member is always installed evenly. Because of this inefficient and the removal of the tension member, very large force is required due to the bent portion of the tension member and the removal rate is insufficient.

In addition, in the case of the recently developed SSC removal anchoring method (FIG. 2), the device is complicated and the cost of machining is high, and the contact area of the wedge is small (11 in FIG. 2). As it is added, the risk of destruction increases. If wedge is destroyed arbitrarily in anchoring method, there is a great risk of safety accident due to loss of anchor function.

The present invention has the advantage of excellent economic and stability by making it easy to remove the tension member of the anchor by a relatively simple device to compensate for this disadvantage.

The present invention is a device that can easily remove the tension wire of the anchor remaining in the ground after use to solve the problems of the anchor method as described above to the anchor method that has been applied by removing the tension steel buried in the ground In comparison, the cost reduction and civil complaints are prevented due to the occupancy of the underground land, and in particular, by removing the tension wire in the ground, there is an advantage of preventing ground environmental pollution.

The present invention for achieving this object is a load-bearing body for exerting the required anchor force in the lower part of the anchor, a removable anchorage for removing the tensile steel wire, an unbonded strand for transmitting the tension force, for removal for dismantling the removable anchorage The removal fixing device composed of the plastic fixing nut for fixing the steel wire, the removable fixing device, the fixing plate, and the protective cap for protecting the removable fixing device is installed. By dismantling the plastic fixing nut, the removable anchorage consisting of pieces is disassembled and the wedge holding the tensioning wire is dismantled so that the tensioning wire can be removed.

1 is a conventional U-shaped anchor assembly

Figure 2 is a conventional SSC removable anchor assembly view

3 is a conceptual diagram of conventional SSC removal anchor dismantling

Figure 4 is an assembly view of the removable fixing device and the inner body

Figure 5 is a flow chart for removing the tensile steel wire of the removable fixing device

<Explanation of symbols for main parts of drawing>

1: spacer 2: grout hose

3: UNBONDED STRAND 4: Removal steel wire

5: fixing plastic nut 6: inner body

7: removable fixing unit 8: Wedge

9: Fixture Fixing Plate 10: Protective Cap

11: heat shrink tape 12: washer

Hereinafter, described in detail by the accompanying drawings as follows.

4 is an assembly view of the removable anchorage and the load bearing body, the load bearing body 6 for exerting the anchor force at the lower part of the anchor, the removable anchorage 7 for removing the tension steel wire, and the unbonded for transmitting the anchor force. strands (3), plastic fixing nuts (5) for fixing the removable fixing device to the inner body, fixing plates (9), washers (12), removal steel wire (4) for dismantling the plastic fixing nuts, these devices Consists of a protective cap (10) for protecting the plastics by installing a fixing device in the lower part of the anchor as shown in Figure 5 A, and after completing the function of the anchor and drawing the removal steel wire (2) as shown in Figure 5 B Dismantling the fixing nut (5) and cutting the unbonded strand (3) that holds the tension as shown in Figure 5 C will cut the unbonded strand that holds the tension force to impact the removable fixing device (5) Will also consist of pieces By weight of the weight of the strand-type fixing device is dropped into the protective gap 10.

At this time, the removable anchorages installed in 4 to 6 pieces are separated in the protective cap, thereby dismantling the Wedge (8) which was fixing the tensioning wire so that the tensioning wire can be easily removed as shown in FIG. 5D. It is.

This principle focuses on the fact that the installation direction is downward since most anchors are installed in the ground, and the device is simple and inexpensive as compared with the conventional removable anchor.

As described above, the present invention compensates for the disadvantage that the tensile steel wire in the anchoring method is buried in the ground to completely remove the tensile steel wire installed in the ground so that the anchoring method has been generally applied. In comparison, it can reduce the cost and civil complaints caused by underground land use, and in particular, it can prevent ground pollution by removing obstacles in the ground, and it has the advantage that the device is simple and inexpensive compared to some developed anchoring methods. .

Claims (1)

In the removal anchor fixing device for civil engineering Removable anchor fixing device consisting of a car body and a piece to transmit the anchor force. Installation of removal steel wire and dismantling removal fixing device using plastic fixing nut