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Removal method of steel strand in anchor cable

A technology of steel strands and anchor cables, applied in construction, foundation structure engineering, sheet pile walls, etc., can solve the problems of steel strands left behind, increase the difficulty and cost of underground obstacles, waste materials, etc., and achieve the effect of convenient demolition

Active Publication Date: 2020-08-04
SUZHOU NG FOUND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, such as conventional anchor cables, the steel strands are left in the soil layer after use, which not only wastes materials, but also forms obstacles to the construction of adjacent buildings
For example, the length of the commonly used anchor cables basically reaches 20-30 meters, and it is difficult to dismantle and recycle them according to the existing technology.
In quite a few engineering examples, special construction measures have to be taken in the subsequent construction of adjacent buildings due to the influence of anchor cables, which greatly increases the difficulty and cost of dealing with underground obstacles during development

Method used

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  • Removal method of steel strand in anchor cable
  • Removal method of steel strand in anchor cable
  • Removal method of steel strand in anchor cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In the method for removing steel strands in an anchor cable in this embodiment, the anchor cable 1 in this embodiment includes an anchor head 2 and a steel strand 3 embedded in a foundation body. The anchor head 2 is provided with a fixing component 6 for fixing and clamping one end of the steel strand 3 . The fixing assembly 6 includes a clamping part for clamping one end of the steel strand 3 . The other end of the steel strand 3 protrudes out of the base body and is tensioned.

[0060] The method for removing the steel strand in the anchor cable of the present embodiment may further comprise the steps:

[0061] 1) Determine the steel strand 3 that needs to be removed, and extend the steel strand 3 out of the other end of the base body to relax the prestress. The steel strand 3 is twisted by the middle wire 3-1 and multiple side wires surrounding the middle wire. become.

[0062] Steel strand 3 can be formed by hinged connection of one middle wire 3-1 and two, thre...

Embodiment 2

[0073] The removal method of the steel strand in the anchor cable of the present embodiment is an improvement on the basis of the first embodiment, and differs from the first embodiment in that it includes the following steps:

[0074] 1) Determine the steel strand 3 that needs to be removed, extend the steel strand 3 out of the other end of the foundation body to relax the prestress, and the steel strand 3 is twisted by the grouting pipe 4 and multiple side wires surrounding the grouting pipe. become;

[0075] 2) Inject the chemical solution 5 that can dissolve the clamping part or a section of steel strand clamped by the fixing component 6 into the grouting pipe 4;

[0076] 3) After the clamping part or a section of steel strand dissolves and loses its binding force to the steel strand 3, the steel strand 3 is pulled out and removed.

Embodiment 3

[0078] The removal method of the steel strand in the anchor cable of this embodiment is an improvement on the basis of Embodiment 1 and Embodiment 2, and differs from the above embodiment in that it includes the following steps:

[0079] 1) Determine the steel strand 3 that needs to be removed, and stretch the steel strand 3 out of the other end of the base body to relax the prestress. The steel strand 3 is formed by twisting a plurality of side wires with anti-corrosion sheath around a hollow channel ;

[0080] 2) Inject a chemical solution 5 that can dissolve the clamping component or a section of steel strand clamped by the fixing component 6 into the hollow channel;

[0081] 3) After the clamping part or a section of steel strand dissolves and loses its binding force to the steel strand 3, the steel strand 3 is pulled out and removed.

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Abstract

The invention relates to a dismounting method for a steel stand in an anchor cable and belongs to the technical field of pile bodies in fixed constructions. The dismounting method comprises the following steps that (1) the steel strand needing to be dismounted is determined, prestress at the other end, extending out of a basal body, of the steel strand is lowered, and the steel strand can be formed by twisting a central wire and a plurality of side wires surrounding the central wire or formed by twisting a grouting pipe and a plurality of side wires surrounding the grouting pipe or formed by twisting a plurality of side wires which are provided with anticorrosion jackets and surround a hollow channel or formed by twisting a central wire provided with a hollow channel and a plurality of side wires surrounding the central wire; (2) a grouting channel is formed in the steel strand; (3) a dissoluble clamping part or chemical solution or expanded liquid of a steel strand section clamped bya fixing assembly is injected into the grouting channel; and (4) after the clamping part or the steel strand section is dissolved and binding force to the steel strand loses, the steel strand is pulled out and then dismounted. The steel stand in the anchor cable is dismounted conveniently through the dismounting method.

Description

technical field [0001] The invention relates to a method for removing a steel strand in an anchor cable, and belongs to the technical field of piles in fixed buildings. Background technique [0002] In the prior art, such as conventional anchor cables, the steel strands are left in the soil layer after use, which not only wastes materials, but also forms obstacles to the construction of adjacent buildings. All reach 20-30 meter basically as the anchor cable length that usually adopts, it is difficult to dismantle and reclaim it according to the prior art. In quite a few engineering examples, special construction measures have to be taken in the subsequent construction of adjacent buildings due to the influence of anchor cables, which greatly increases the difficulty and cost of dealing with underground obstacles during development. [0003] For this reason, there is an urgent need for a method that facilitates the recovery of the steel strands of clip-type anchor cables, gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/74E02D9/00
CPCE02D5/74E02D9/00
Inventor 周建明杜明祥范惠菊陆晓明董文明
Owner SUZHOU NG FOUND ENG