Glide plane sensing anchor rod and monitoring method thereof

Abstract

The invention discloses a glide plane sensing anchor rod and monitoring method thereof. The anchor rod includes a fiber enhanced composite material anchor rod body, a long-period optical fiber gratingsensor string, an optical fiber grating multi-point temperature compensation auxiliary sensor, an optical fiber interface protection sleeve, epoxy resin and armored optical fiber. According to the invention, by arranging the LPFG on a fracture surface in a certain angle with a rock face and perpendicular to the horizontal face, stress, tension and damage of the anchor rod in different depths of arock layer can be tested. At the same time, bending curve, bending direction and bending deformation of the rod body can be obtained by utilizing the banding sensing characteristic of the LPFG, richer information can be provided for slope monitoring , slope stability analysis can be facilitated, continuous data collection can be achieved in slope slide face detection and continuous dynamic monitoring is realized.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering safety monitoring, and specifically refers to a sliding surface sensing bolt and a monitoring method thereof. Background technique [0002] In our country, the economic loss caused by local or transient large deformation of slope rock mass and even instability and sliding is huge every year. Therefore, the safety monitoring of slope engineering has always been an important topic in the field of geotechnical engineering. At present, there are many technologies and methods applied to slope safety monitoring at home and abroad, from traditional inclinometers, pressure gauges, rain gauges, displacement meters, new GPS, TDR and optical fiber sensors, all of which are widely used in actual engineering monitoring. [0003] Traditional monitoring technology is relatively backward in terms of digitization, automation and accuracy, and is easily affected by terrain visibility constraints an...

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Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a sliding surface sensing bolt and its monitoring method to solve the problem that the traditional monitoring technology in the prior art is relatively backward in terms of digitization, automation and accuracy, and is easily affected by terrain. Due to the limitation of visibility conditions and the influence of meteorological conditions, the workload is heavy, the cycle is long, and the continuous and real-time observation capabilities are poor

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