岩土力学2017，Vol.38Issue(5)：1298-1304,7.DOI:10.16285/j.rsm.2017.05.009
基于BOTDR的光纤应变与顶板沉降变形关系的模型构建与试验研究
Theoretical and experimental study of the relationship between optical fiber strain and settlement of roof based on BOTDR technology
摘要
Abstract
Brillouin optical time-domain reflectometer (BOTDR) techniques have numerous advantages such as distributed measurement,long distance and real-time online,which are widely used in the structural engineering field and show extensive application prospects.However,the application of BOTDR is relatively limited in the field of geotechnical engineering,and thus some relevant technologies need to be improved.In this study,the relationship between strain measurements by the optical fiber distributed along the direction of axial tunnel and the deformation of tunnel roof subsidence is investigated based on the strain monitoring technology of BOTDR.Firstly,according to the deformation regularity of tunnel roof,three mathematical models,namely the circular arc model,the parabolic model and the triangle model,are established for the relationships between the strain along tunnel axial direction and the deformation of tunnel roof subsidence.Secondly,experiments are conducted to examine the relationship between the optical fiber strain and the deformation of tunnel roof subsidence.The final comparative analysis reveals that the theoretically calculated values show well agreement with experimental data.The optical fiber strain can be linked with the roof subsidence by using these three analytical models,which has theoretical significance and practical engineering value for the application and improvement of BOTDR technology.关键词
BOTDR技术/应变监测/顶板沉降Key words
BOTDR technology/strain monitoring/roof subsidence分类
建筑与水利引用本文复制引用
侯公羽,谢冰冰,江玉生,殷姝雅,韩育琛..基于BOTDR的光纤应变与顶板沉降变形关系的模型构建与试验研究[J].岩土力学,2017,38(5):1298-1304,7.基金项目
中央在京高校重大成果转化项目(No.ZDZH20141141301) （No.ZDZH20141141301）
国家自然科学基金委员会与神华集团有限责任公司联合资助重点项目(No.U13611139,No.U1261212).This work was supported by the Central University Major Achievement Transformation Project in Beijing (ZDZH20141141301) and the National Natural Science Fund Committee and Shenhua Group Co.,LTD.Jointly Funded Key Projects (U13611139,U1261212). （No.U13611139,No.U1261212）
