Method and device for monitoring slope deformation and damage based on optical time domain reflectometer technology

Abstract

The invention relates to a method and device for monitoring slope deformation and damage based on the optical time domain reflectometer technology. The method for monitoring slope deformation and damage based on the optical time domain reflectometer technology includes the following steps that firstly, distributed optical fibers are pre-buried in a slope body; secondly, optical pulses are transmitted into all the optical fibers; thirdly, returned backscattering information and Fresnel reflection information are received and recorded as detection information; fourthly, two adjacent pieces of detection information are compared and analyzed to judge whether deformation and damage happen to a slope and the position of the deformation and the damage. The second step, the third step and the fourth step are repeated at set time intervals. According to the method for monitoring slope deformation and damage based on the optical time domain reflectometer technology, the position of macrobend deformation or breakage of the optical fibers is determined, thus, the deformation and the damage of a slope rock and earth mass is positioned through the position of macrobend deformation or breakage of the optical fibers.

Description

technical field [0001] The invention relates to slope geotechnical engineering, in particular to a method and device for monitoring slope deformation and damage based on optical time domain reflection technology. Background technique [0002] At present, during the construction and operation of slope projects, except for a few key high slope or landslide disease projects that have implemented key instrument monitoring, most slope projects have not deployed corresponding safety equipment in their design, construction and operation management. monitor. There are problems such as imperfect slope safety monitoring system, backward traditional observation methods, and serious lag in information analysis, which lead to maintenance and management personnel not being able to grasp the actual operation status of the slope project in a timely and accurate manner, and cannot provide scientific information for the effective management of the slope project. It not only directly affects ...

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Problems solved by technology

[0004] (1) Due to the large number of slope projects, which are distributed in a scattered point and belt, the nature of the projects is different, and the stability states are different. It is difficult to accurately evaluate the key slopes or potential landslide disease sections, and the investment in monitoring projects is often wasted due to misjudgments and poor stability. Or due to the omission of potential landslides, hidden dangers of disease are buried, and there are often key monitoring and prevention, but no signs of deformation and damage are found. In more cases, slope deformation and damage often occur without any monitoring measures

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