BOTDA技术在大跨度桥梁监测中的应用

摘要     PPP-BOTDA技术是近年来发展起来的一种尖端技术,目前已广泛应用于大跨度桥梁变形监测中。温度对分布式光纤监测技术有着重要的影响,但温度补偿一直都处在研究阶段。本文采用松套光纤的方式进行直接的温度补偿,消除桥梁监测数据中的假应变,从而得到更加精确的桥梁变形信息。并通过具体工程实例对比分析,验证了该方法的可行性。                PPP-BOTDA has been developed into a cutting-edge technology in recent years,which is now widely used in the deformation monitoring for large span bridges.Temperature has a very important effect on the distributed optical fiber monitoring technology,but up to now temperature compensation has been explored and studied.In this paper,the loose tube optical fiber method is adopted to directly make temperature compensation so as to eliminate the false strain of the bridge monitoring data and obtain more precise bridge deformation information.In addition,taking a specific engineering project as an example,the method is testified to be feasible.
作者    刘少聪 李汉彬 王磊
机构地区   中国地质大学信息工程学院 中国石油天然气股份有限公司西气东输管道分公司 江西省煤田地质局测绘大队
出处     《工程地球物理学报》  2013年第2期264-267,共4页Chinese Journal of Engineering Geophysics
关键词   分布式光纤变形监测温度补偿distributed optical fiber deformation monitoring temperature compensation
分类号   P258 [天文地球—测绘科学与技术]