Research On The Model Test For The Soil Slope Stability Based On The Distributed Optical Fiber Sensing Technology

In this paper,In conducting the indoor model test, simulate and monitor the slope failure process in the load, water level changing and soil-nailed before and after reinforcement by using the distributed optical fiber sensing technology, and the following results are obtained:1. According to the distributed optical fiber sensing technology in the monitoring principle, introduced with emphasis two kinds of optical fiber sensing technology:the BOTDR and FBG, analysed the advantages and disadvantages of both strain measurement method.2. In order to simulate and analyse the failure process and stability of optical fiber sensing technology of soil slope in the load, fluctuation of reservoir water level and soil before and after reinforcement of, design based on the BOTDR and the FBG two kind of distributed optical fiber sensing technology in slope model device combining the advantages of monitoring.The results show that the model device for multi field soil slope simulation provides a good test means.3. After more than10trials in half a year in application of the model of the device, water level change, soil nail reinforcement load under the conditions of soil slope model test is carried out on the slope respectively. Through real-time monitoring and data acquisition, obtains the slope model under influence of several factors of slope stress and strain change process data.In order to grasp soil slope under influence of several factors on the failure mechanism, provides valuable first-hand information.4. The test focuses on the research of load and water level changes under the effect of slope deformation and failure process based on the experiment.And according to the monitoring data, under the coupling effect of slope failure mechanism was analyzed and evaluated.5. According to the distributed optical fiber sensor monitoring data, determine the slope sliding zone position, put forward to use the distributed optical fiber sensing technology for determining soil slope sliding surface.6. According to the monitoring data, analyse the soil slope stability before and after the model of soil nailing.The validation of the distributed optical fiber sensor monitoring technique applied in soil slope deformation monitoring is feasible.