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| 基于BOTDR的隧道应变监测与数值模拟 | |
| 引用本文： | 邱海涛,李川,刘建平. 基于BOTDR的隧道应变监测与数值模拟[J]. 传感器与微系统, 2011, 30(12): 78-81 |
| 作者姓名： | 邱海涛 李川 刘建平 |
| 作者单位： | 1. 北京科技大学土木与环境工程学院,北京,100083 2. 昆明理工大学信息与自动化学院,云南昆明,650093 3. 昆明理工大学人事处,云南昆明,650093 |
| 基金项目： | 国家自然基金重点基金资助项目(51034001) |
| 摘 要： | 基于布里渊散射原理的布里渊光时域反射计(BOTDR)是一种新型的光纤传感器.在介绍该项技术工作原理的基础上,以西南某隧道为实例,采用三维快速拉格朗日法,获得了隧道二次衬砌中应力和位移的分布规律,提出了隧道光纤的铺设方案、粘贴方式及安装工艺.讨论了一天内最大温差对应变监测结果的影响,并在不同时期对隧道内纵向光纤线路和某个... |
| 关 键 词： | 布里渊光时域反射计 光纤 隧道 数值模拟 应变 分布式监测 |
Tunnel strain monitoring and numerical simulation based on BOTDR |
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| QIU Hai-tao,LI Chuan,LIU Jian-ping. Tunnel strain monitoring and numerical simulation based on BOTDR[J]. Transducer and Microsystem Technology, 2011, 30(12): 78-81 | |
| Authors: | QIU Hai-tao LI Chuan LIU Jian-ping |
| Affiliation: | 1.School of Civil and Environmental Engineering,University of Science and Technology Beijing, Beijing 100083,China;2.School of Information and Automation Engineering,Kunming University of Science and Technology,Kunming 650093,China;3.Personnel Division of Kunming University of Science and Technology,Kunming 650093,China) |
| Abstract: | The Brilliouin optical time domain reflectometer(BOTDR)is a new type of optical fiber sensor based on Brilliouin scattering principle.The basic principle and features of the BOTDR are introduced,and taking a tunnel located in southwest China for example,the stress and displacement distribution in secondary liner are obtained using three-dimensional fast Lagrangian analysis of continua(3D-FLAC)method.Accordingly the laying scheme,installation technics,adhesive method of optical fiber in tunnel is put forward.In addition,the influence of daylong maximal difference in temperature on the monitoring results is discussed.Finally,the measurement results of the tunnel’s lengthways optical fiber line and some tunnel’s cincturing arch line at different period are analyzed.The results show that the BOTDR is a feasible and effective method for the strain measurement in the tunnel. |
| Keywords: | BOTDR optical fiber tunnel numerical simulation strain distribution monitoring |
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