Accurate positioning method for concrete crack

Abstract

The invention relates to an accurate positioning method for a concrete crack. The method comprises the following steps: acoustic emission sensors (1) are packaged by epoxy resin, subjected to waterproofing work, buried in a concrete (2) structure as large aggregate, and connected with acoustic emission monitoring equipment (4) through coaxial screened cables (3); the acoustic emission monitoring equipment (4) is used for recording and analyzing acoustic emission source information, locates the position of a particular acoustic emission source (a crack) according to a received acoustic emission signal, and observes the developing and variation trend of the acoustic emission source (the crack); a cardinal point O is selected; the particular coordinate positions of the four acoustic emission sensors (1) are determined by taking the cardinal point O as datum; the acoustic emission sensors (1) are arranged in the concrete (2), and are led out to the acoustic emission monitoring equipment (4) through the coaxial screened cables (3) respectively. The accurate positioning method is accurate in positioning of a concrete crack, and reduces omissive and false positioning to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of concrete monitoring, in particular to a precise location of concrete cracks [0002] method. Background technique [0003] With the continuous progress of construction technology and the use of new materials, major projects such as giant projects and super high-rise buildings have widely come into people's sight. The accompanying safety problems are becoming more and more serious. How to conduct real-time and online monitoring of major projects, discover safety hazards early, and gain as much time as possible for effective measures have become the key and difficult issues in today's engineering field. Concrete is the most widely used building material in civil engineering. In-depth research on it and the establishment of a concrete-damage integrated model are of great value for real-time and online monitoring of projects. It is a common phenomenon that cracks appear in the concrete structure during use...

AI Technical Summary

Problems solved by technology

However, the sound velocity measured by the experiment is not a constant value, and the sound velocity has a significant impact on the positioning results

In practical applications, the acoustic emission signal can be detected through the pass, but it is difficult to find the exact location of the acoustic emission source

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