FBG传感技术在边坡稳定性监测中的应用  

Study on the application of FBG sensing technology in monitoring slope stability

作　　者：章征林 王源[1] 李小雷[2] 张清华[1] 孙阳阳[1] 

机构地区：[1]解放军理工大学,江苏南京210007 [2]西南交通大学,四川成都610031

出　　处：《光电子．激光》2016年第8期838-844,共7页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展计划"973"(2010CB732003;2013CB036005);教育部长江学者和创新团队发展计划(IRT13071)资助项目

摘　　要：基于光纤布拉格光栅(FBG)传感器技术,针对边坡开挖过程滑坡监测问题,通过在边坡布设的多个传感器组成的监测系统,测得实验过程中传感器表面应变的变化规律,实现对滑坡体内部位移的监测;运用K值标准差准则,将边坡失稳滑动规律定量化。实验结果表明,钢筋应变传感器测量的滑坡体内部位移变化与理论分析一致,表明钢筋传感器可实现对滑坡的准确监测;通过内部位移的微小变化的监测,可实现对边坡失稳进行预警。Based on experiment and monitor principles of fiber Bragg grating （FBG） sensor, this paper fo- cuses on monitoring the landslide under excavation and gains the surface stress change principles of the sensor. The sensing system contains many sensors set up along the slope, thus the monitoring of the in- ternal stress of landslide can be realized. Using the standard deviation criterion of K value, the sliding law of the slope instability can be quantified. The experimental results show that the internal displacement changes monitored by the FBG are consistent with the theoretical results, demonstrating that FBG can be used to accurately monitor the landslide and warn the slope instability by monitoring the micro changes of internal displacement.

关 键 词：边坡稳定性 光纤布拉格光栅(FBG)传感器 监测预警 K值标准差准则 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]