Compensation and adjustment method for anchor cable prestress loss

A technology of compensation adjustment and prestressing, which is applied in construction, sheet pile walls, foundation structure engineering, etc., and can solve problems such as prestress loss compensation

Active Publication Date: 2015-11-18
INST OF EXPLORATION TECH OF CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2. Human factors
According to the use of the existing domestic fixed anchor cables (fixed anchors), it is urgent to provide a method for compensating a

Method used

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  • Compensation and adjustment method for anchor cable prestress loss
  • Compensation and adjustment method for anchor cable prestress loss
  • Compensation and adjustment method for anchor cable prestress loss

Examples

Experimental program
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Embodiment 1

[0070] An anchor cable prestress loss compensation adjustment method in this embodiment is implemented according to the following process steps:

[0071] a. Remove debris on exposed steel strands;

[0072] b. Install slips and slips and limit them;

[0073] c. Pass the connecting screw through the connecting anchor, and screw the connecting anchor into the slipper;

[0074] d. Install the support frame, jack, sensor, tool anchor, and then perform tensioning;

[0075] e. When the outer anchorage is displaced, when it is stretched to the required locking force, put the semi-combined steel gasket under the outer anchorage;

[0076] f. Remove the jack and supporting frame, take out slips and slips, etc.;

[0077] g. Carry out anti-corrosion treatment of outer anchorage;

[0078] When carrying out the anchor cable prestress adjustment construction in the above step a, at first the protective pier must be cut manually, and the concrete attached to the working anchorage and expos...

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PUM

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Abstract

The invention relates to a compensation and adjustment method for anchor cable prestress loss. The compensation and adjustment method is carried out according to the following process steps that a, debris on an exposed steel strand is cleaned up; b, a slip implement and a slip are installed, and displacement limitation is conducted; c, a connecting screw penetrates through a connecting anchorage device, and the connecting anchorage device is screwed into the slip implement; d, a supporting frame, a jack, a sensor and a tool anchor are installed, then stretching-drawing is conducted; e, displacement happens to an outer anchorage device; when required locking force is reached through stretching-drawing, semi-closed steel gaskets are put under the outer anchorage device; f, the jack and the supporting frame are removed, and the slip, the slip implement and the like are taken out; and g, preservative treatment is conducted on the outer anchorage device. According to the compensation and adjustment method for the anchor cable prestress loss, the service life of an original stationary type anchorage device is prolonged; construction cost is low; construction difficulty is simplified; the original stationary type anchorage device can be used in time. The difficult problem troubling the engineering field for a long time, that compensation stretching-drawing can not be conducted after the prestress of a stationary type anchor cable is lost due to natural or human factors is solved.

Description

technical field [0001] The invention relates to a compensation adjustment method for anchor cable prestress loss. Background technique [0002] The existing prestressing technology has only been used in engineering for more than half a century. Due to its unique advantages, it has developed rapidly and is widely used in various fields, and the number of applications is increasing day by day. Prestressed anchor cables (bolts, anchorages) can fully exert the energy of rock and soil, use and improve the self-strength and self-stabilization ability of rock and soil. After the application of prestressed anchor cable technology, it can greatly reduce the weight of the structure and save engineering materials. It can ensure construction safety and engineering stability, so it is widely used. It has been applied in the fields of large-span underground chamber reinforcement, dam foundation engineering, deep foundation pit retaining, slope engineering, structural anti-floating and an...

Claims

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Application Information

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IPC IPC(8): E02D5/74
Inventor 石胜伟姜昭群张勇胡时友罗宏保
Owner INST OF EXPLORATION TECH OF CHINESE ACAD OF GEOLOGICAL SCI
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