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基于BOTDR的隧道应变监测研究
引用本文:张丹,施斌,徐洪钟.基于BOTDR的隧道应变监测研究[J].力学学报,2004,12(4):422-426.
作者姓名:张丹  施斌  徐洪钟
作者单位:南京大学地球环境计算工程研究所,南京210093
基金项目:国家杰出青年科学基金项目(40225006);国家教育部重点项目资助(01086)
摘    要:布里渊散射光时域反射计 (BOTDR)是近年来才研发成功的分布式应变测量技术。本文首先介绍了BOTDR的优点和测量原理 ,以某隧道的BOTDR应用实例 ,论证了这一技术应用于岩土工程等结构物分布式应变监测的可行性和优势 ,最后就这一技术在应用中的一些关键技术 ,如空间分辨率、光纤布设工艺、健康监测与损伤诊断等作了阐述

关 键 词:BOTDR  分布式光纤传感  应变  布里渊散射光  隧道
收稿时间:2004-05-11
修稿时间:2004-05-17

THE BOTDR-BASED STRAIN MONITORING FOR TUNNEL
ZHANG Dan,SHI Bin,XU Hongzhong.THE BOTDR-BASED STRAIN MONITORING FOR TUNNEL[J].chinese journal of theoretical and applied mechanics,2004,12(4):422-426.
Authors:ZHANG Dan  SHI Bin  XU Hongzhong
Institution:Advanced Computational Engineering Institute for Earth Environment, Nanjing University,Nanjing 210093
Abstract:Brillouin Optical Time-Domain Reflectometer (BOTDR) is a newly developed distributed measuring technique for strains. In this paper, the merits and the basic measurement principle of BOTDR is presented. The feasibility and advantages of the distributed strain monitoring of structures in geotechnical engineering are demonstrated by a case study for strain monitoring in a tunnel. At the end, several key issues for applications of BOTDR are discussed, including enhancement of spatial resolution, layout of the sensing optical fiber and the health monitoring and damage diagnosis.
Keywords:BOTDR  Distributed optical fiber sensing  Brillouin scattering  Tunnel
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