基于In SAR的城市地下轨道交通沉降与灾害监测

Urban underground rail transit settlement and disaster monitoring based on In SAR

城市地铁建设会对邻域造成地质环境损伤,甚至发生灾变。传统基于点位测量的方法在实际应用过程中存在野外作业周期长、受天气影响及耗费大量人力物力等缺点。因此,本文基于城市地下轨道交通安全施工中的应用需求,以天津市地铁五号线为例,利用27景Terra SAR数据和PS-InSAR时序监测方法,对地下轨道交通地铁站和隧道施工影响进行了监测和评估。结果表明,PS-InSAR能在施工期间监测到地铁线及周边的形变,有利于城市轨道交通全生命健康监测。

The construction of urban metro will cause damage to the geological environment in the neighborhood,even catastrophe.The traditional methods based on point measurement have some shortcomings in practical application,such as long field operation cycle,weather influence and consuming a lot of manpower and resources.Therefore,based on the application requirements of urban underground train safety construction,taking Tianjin metro Line 5 as an example,this paper uses 27 Terra SAR data and PS-InSAR time series method to monitor and evaluate the impact of underground train construction.The results show that PS-InSAR can monitor the deformation of metro line and its surrounding areas during construction period,which is beneficial to the whole life and health monitoring of urban rail transit.