A monitoring method for slurry cracks based on strain loss

Abstract

The invention discloses a slurry crack monitoring method based on strain loss. A system for measuring the strain of a slope anchor rod and anchoring slurry and a set of algorithm for accurately calculating the crack condition of the anchoring slurry are adopted; actual measurement data based on a fiber bragg grating strain sensor is accurately obtained; through precise calculations, specific expansion indexes of the cracks of the anchoring slurry are given; the method can be effectively suitable for monitoring and calculating the anchoring slurry cracks in the severe slope environment for a long time, the sizes of the anchoring slurry cracks are accurately provided, landslide risk assessment is facilitated, the method is low in cost, high in reliability and high in calculation precision, and long-term and real-time monitoring of the slurry health of the anchoring structure is effectively achieved. The method is applied to the technical field of anchoring structure monitoring.

Description

technical field [0001] The invention relates to the technical field of anchorage structure monitoring, in particular to a method for monitoring slurry cracks based on strain loss. Background technique [0002] There are many mountainous areas in our country. In order to effectively prevent natural disasters such as mudslides and landslides, slope anchorage structures are widely used in slope protection projects. However, it is difficult to detect the health status of the slope anchoring project, especially the problems caused by the difficulty in monitoring the crack expansion of the anchoring slurry, which often brings huge losses to the entire project. Facing the problem that it is difficult to monitor the cracks in the anchoring slurry of the slope, it is of great significance to use information equipment and accurate calculation to reflect the expansion of the cracks in the anchoring slurry in real time. [0003] The existing crack monitoring methods include piezoelectr...

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Problems solved by technology

However, the above-mentioned methods have certain limitations. The piezoelectric ceramic sensor of the piezoelectric ultrasonic monitoring method has a low survival rate and is easily affected by environmental noise. It is difficult to completely waterproof and avoid external noise interference in slope protection projects; the image recognition method is only It can judge the cracks on the surface of the structure, but cannot monitor the cracks in the slurry embedded in the slope; the optical time domain and optical frequency domain reflectometer monitoring methods are difficult to characterize and calculate the crack size, and cannot provide an accurate evaluation index for the crack size of the anchoring slurry

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