光纤光栅位移计组在围岩变形连续监测中的应用研究  

Application of fiber Bragg grating displacement meter groups in continuous monitoring of deformation of surrounding rock

作　　者：朱赵辉[1,2] 任大春[3] 李秀文[1,2] 孙建会[1,2] 王万顺[1,2] ZHU Zhao-hui REN Da-chun LI Xiu-wen SUN Jian-hui WANG Wan-shun(China Institute of Water Resources and Hydropower Research, Beijing 100038, China China Three Gorges Corporation, Beijing 100038, China Beijing IWHR Co., Ltd., Beijing 100038, China)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]北京中水科工程总公司,北京100038 [3]中国长江三峡集团公司,北京100038

出　　处：《岩土工程学报》2016年第11期2093-2100,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家重点基础研究发展计划(“973”计划)项目(2013CB035900)

摘　　要：针对多点变位计和滑动测微计在监测地下洞室围岩变形方面存在轴向位移分布连续性不足和无法实现自动化的问题,提出了将光纤光栅位移传感器通过组装成串应用在围岩变形连续监测的方法。该方法可准确得到仪器埋设沿线任一测点的监测量,由于光纤光栅位移计组具有精度高的特性,测得的围岩位移变化与洞室扩挖施工关系密切,与多点变位计监测结果总体变形规律基本一致,但光纤光栅位移计组能够监测到整个大尺度的监测线中任意间距的轴向位移分布,取得的成果信息量更大更为直观。作为对光纤光栅位移计在岩土工程变形监测中的应用探索,具有一定借鉴意义。In the field of monitoring the deformation of surrounding rock of underground caverns, multi-point displacement meters and sliding micrometers lack continuity in the axial deformation and automatic monitoring, cannot be realized. In view of the above problems, a continuous monitoring method is proposed, that is, the fiber Bragg grating displacement sensors are assembled to monitor deformation of the surrounding rock. This method can get the accurate monitoring value at any point of the hole. Because of the high precision of the fiber Bragg grating displacement meter groups, variation of displacement of the surrounding rock is closely related to the excavation of the caverns, and the wholly deformation law is basically consistent with the results of multi-point displacement meters. But the fiber Bragg grating displacement meter groups can monitor the distribution of axial displacement with in any distance of the whole large-scale monitoring line, and the achieved information is much more and more intuitive. The application of fiber Bragg grating displacement meters in the deformation monitoring of geotechnical engineering is of great significance.

关 键 词：光纤光栅位移计 地下洞室 围岩变形 监测 

分 类 号：TU454[建筑科学—岩土工程]