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Apparatus and method for existing anchorage engineering quality detection

A technology of engineering quality and anchoring, which is applied in the direction of basic structure engineering, tension measurement, and basic structure testing, etc. It can solve the problems of unguaranteed working life, increased project cost, detection and compensation of existing anchoring projects, etc.

Inactive Publication Date: 2009-01-14
中铁西北科学研究院有限公司深圳南方分院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the anchor cable (rod) stress gauge is relatively expensive, it will greatly increase the project cost, causing most of the current anchoring projects to save cost and not installed; and the anchor cable stress gauge works in the field, which is greatly affected by the environment, and its working life cannot be reached. Guarantee, generally only 3 years of service life
As for other long-term bearing properties of anchorage engineering, including residual anchorage strength and material residual strength, there is no testing method at present.
[0007] In addition, after most of the anchoring projects are completed and accepted, most of the steel strands exposed outside the anchor holes for testing are cut off. Therefore, it also brings great difficulties to the post-testing work of existing anchoring projects. Therefore, At present, there is no device and method for detecting and compensating the post-quality of existing anchoring projects

Method used

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  • Apparatus and method for existing anchorage engineering quality detection
  • Apparatus and method for existing anchorage engineering quality detection
  • Apparatus and method for existing anchorage engineering quality detection

Examples

Experimental program
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Effect test

Embodiment 1

[0082] For the existing anchoring project that the length of the steel strand used for tensioning meets the required length of tensioning, the method for quality detection of the anchoring project of the present invention comprises the following steps:

[0083] Step a: Install the tensioning device using the existing anchor cable tensioning test installation steps:

[0084] a 1 1. Place the clip limiting plate on the working anchor of the existing anchoring project, pass the remaining steel strands of the existing anchoring project through the jack, and place the bottom of the jack on the clip limiting plate;

[0085] a 2 . Install the working anchor on the top of the jack, pass the remaining steel strand through the tool anchor, and then insert a tool clip into the tool anchor, and tighten the remaining steel strand;

[0086] Step b: Conduct a pull test:

[0087] b 1 , applying an initial load, so that the tension devices are tightly connected;

[0088] b 2 1. Slowly ap...

Embodiment 2

[0091] For the existing anchoring project whose steel strands used for tension detection have been cut and cannot meet the required length of tensioning, it is necessary to install the existing anchoring project quality detection device of the present invention and then adopt the detection method of the present invention method to detect.

[0092] As shown in Figures 1 and 2, the device for quality inspection of existing anchoring projects of the present invention includes three parts: a connecting part, a supporting part and a limiting part. The following describes each part in detail with reference to each view.

[0093] The first part: the connecting part, including: the first tool anchor 21 , the second tool anchor 23 and the connecting sleeve 22 .

[0094] Figure 1, figure 2 , image 3 As shown, the first tool anchor 21 is a cylindrical plate whose size and shape are basically the same as those of the working anchor 13 in the existing anchoring project 1, and is used to...

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Abstract

The invention relates to a device and the method for detecting the prior project quality. The anchorage cable long-term pre-stress state and the bearing performance are detected through the specific stretching program and the technical proposal; aiming at the situation of the most prior anchorage projects that the steel stranded wires at the end of the anchorage cable end are sheared off, a device for detecting the prior anchorage project quality is designed in the invention, the residual steel stranded wires at the end of the anchorage cable is prolonged and then stretched, and the project quality is detected according to the detection method of the invention, and through the adopting of the device, the stretching force is reinforced to the prior anchorage project which pre-stress is lost; therefore the invention solves the problem of the post-stage detecting of the drawing force of the anchorage section of the prior anchorage project that the long-term quality hidden danger of the anchorage project is found in advance and prevented, and the invention guarantees the long-term security of the anchorage project and provides an effective solving method.

Description

technical field [0001] The invention relates to a device and method for quality detection and stress reinforcement of anchoring projects, in particular to a device and method for long-term quality detection and stress reinforcement of existing anchoring projects. Background technique [0002] Prestressed anchor cable (rod) reinforcement engineering has been widely used in geotechnical engineering (generally referred to as anchor engineering) such as dam reinforcement, landslide control, high and steep slope reinforcement, underground cavern reinforcement, and deep foundation pit reinforcement. Due to the use of prestressed anchor cable technology in these anchoring projects, a large prestress can be applied to the project to be reinforced in advance during the construction process of the structure to be reinforced and before delivery, so that the reinforced structure remains stable. [0003] However, a large number of engineering practice and theoretical analysis prove that,...

Claims

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Application Information

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IPC IPC(8): E02D33/00E02D5/74G01L5/04
Inventor 王建松朱本珍廖小平刘庆元
Owner 中铁西北科学研究院有限公司深圳南方分院
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