Monitoring and Warning of Landslides and Debris Flows Using an Optical Fiber Sensor Technology  

作　　者：PEI Huafu CUI Peng YIN Jianhua ZHU Honghu CHEN Xiaoqing PEI Laizheng 

机构地区：[1]Department of Civil and Structural Engineering, the Hong Kong Polytechnic University, Hong Kong, China [2]Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China [3]School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China

出　　处：《Journal of Mountain Science》2011年第5期728-738,共11页山地科学学报（英文）

基　　金：supported by research grants of The Hong Kong Polytechnic University (Grant Nos. G-YE54 and 1-BB7U);supported by the State Key Fundamental Research (973) program project (Grant No. 2008CB425802);supported by a project entitled "Analysis of Geological and Mechanics Reasons Causing Damage of Bridge Structures during Wenchuan Earthquake and Recommendations for Reconstruction" (A/C No. 85G0)

摘　　要：Landslides and debris flows are typical geo-hazards which occur in hilly or mountainous regions. Debris flows may result from landslides. Geotechnical instrumentation plays an important role in monitoring and warning of landslides and resulted debris flows. Traditional technologies for monitoring landslides and debris flows have certain limitations. The new optical fiber sensors presented in this paper can overcome those limitations. This paper presents two new optical fiber sensor systems: one is the Fiber Bragg Grating (FBG)-based in-place inclinometer for monitoring landslides and the other is the FBG-based column-net system for monitoring debris flows. This paper presents the calibration results of FBG-based in-place inclinometers in laboratory. It is found that the calibration results are in good agreement with theoretical results. Both the FBG-based in-place inclinometers and the FBG-based column-net system have been installed at a site in Weijiagou valley, Beichuan County, Sichuan Province of China. Some preliminary results have been obtained and reported in the paper. The advantages of the FBG monitoring systems and their potential applications are also presented.

关 键 词：LANDSLIDE Debris flow Fiber Bragg Grating In-place inclinometer Column-net system 

分 类 号：P642.22[天文地球—工程地质学] TP212[天文地球—地质矿产勘探]