基于SBAS-InSAR苏通GIL综合管廊周边地表形变监测

Surface Deformation Monitoring around Sutong GIL Comprehensive Pipe Corridor based on SBAS-InSAR

作为中国华东特高压交流环网合环运行的“咽喉”控制性工程,苏通GIL综合管廊周边地表形变监测意义重大.为了保证综合管廊的健康长效运转,本研究采用SBAS-InSAR技术对施工建设期间38景Sentinel-1A哨兵数据进行处理,获取了苏通GIL综合管廊周边地表时序形变结果,详细分析了管廊周边地表形变时空分布特征,并与同时期地面水准监测数据对比分析.结果显示,管廊周边地表形变与盾构施工、地质条件有着密切的联系;南岸管廊沿线未出现严重的不均匀形变;北岸地表形变随盾构施工沿管廊轴线由西北向东南发展,出现沉降漏斗;SBAS-InSAR监测的地表形变结果与水准监测结果具有一致性.SBAS-InSAR技术可为管廊周边地表形变的灾害和预警防治工作提供参考依据.

As the“throat”of the control project for ultra-high voltage AC ring network in East China,the surface deformation monitoring around the Sutong GIL comprehensive pipe corridor is of great significance.In order to ensure the healthy and long-term operation of the comprehensive pipe corridor,this paper uses SBAS-InSAR technique to process the 38 Sentinel-1A SAR images and obtain the results of time series surface deformation around the Sutong GIL comprehensive pipe corridor,then analyzes the spatial and temporal distribution characteristics of surface deformation around the corridor in detail,finally compares and analyzes the accuracy of SBAS-InSAR monitored results with the data of ground leveling monitoring in the same period of time.The results show that the surface deformation around the corridor is closely related to the shield construction and geological conditions.There was no serious uneven deformation along the south bank of the corridor.The surface deformation of the north bank developed from northwest to southeast along with the corridor axis and a subsidence funnel appeared.The SBAS-InSAR monitored results are consistent with the leveling monitored results.SBAS-InSAR technique can provide reference for further monitoring and early warning of surface deformation and prevention of disaster around the pipe corridor.