基于PS-InSAR技术的深圳北站表面位移监测研究

Surface Deformation Monitoring of Shenzhen North Station Using PS-InSAR Technology

利用2015-01-2018-08的40景COSMO-SKyMed HIMAGE雷达影像,采用永久散射体合成孔径雷达干涉测量(permanent scatterers interferometric synthetic aperture radar, PS-InSAR)技术获得了深圳北站时序形变信息,并基于GIS空间分析方法进一步揭示了深圳北站表面位移的空间分布特征。根据InSAR遥感解译结果,结合深圳北站的工程建设背景,分析深圳北站表面位移的分布演化态势及其形变主导因素。结果表明,深圳北站东广场填土、填砂厚度以及土壤成分、力学性质发生了一定变化,造成缤果空间地基下沉,墙体出现裂缝,外在的高强度工程施工(汇德大厦)则进一步加剧了地面沉降。通过实地踏勘验证了InSAR监测结果的准确性,证实了高分辨率PS-InSAR技术在城市公共设施形变监测、管理维护方面的可行性。

The temporal deformation information of Shenzhen North Station is obtained by permanent scatterers interferometric synthetic aperture radar(PS-InSAR) technique using 40 COSMO-SKyMed HIMAGE radar images from January 2015 to August 2018. The GIS spatial analysis method is used to reveal the spatial distribution of surface displacement in Shenzhen North Station. According to the results of InSAR remote sensing interpretation and the engineering construction background of Shenzhen North Station, the distribution and evolution of surface displacement and its dominant factors of deformation are analyzed. The results show that the filling thickness of soil and sand, soil composition and mechanical properties of the East Square of Shenzhen North Station have changed, resulting in subsidence of Bingo Space and cracks in the wall. The external high-strength enginee-ring construction(Huide Building) aggravates the phenomenon of land subsidence. The accuracy of the InSAR monitoring results are verified by field survey, confirming that the high-resolution PS-InSAR technology is feasible in deformation monitoring, management and maintenance of urban public facilities.