联合InSAR和GNSS监测沿海地区地面沉降

Joint InSAR and GNSS to monitor land subsidence in coastal areas

近年来,城市地表形变造成的损失备受关注。而基于点的传统大地测量监测技术,在区域性的地表形变监测方面存在局限性。本文提出利用空间大地测量技术监测城市地表形变。联合时序InSAR和全球导航卫星系统(GNSS)技术对深圳和香港海岸线的地表形变场进行监测,同时生成香港网络参考站三维变化的时间序列。由结果可知,位于填海区的地铁建筑区和地基较浅的建筑物,存在明显的沉降现象。

The traditional point-based geodetic monitoring technology has limitations for regional surface deformation.Spatial geodesy technology proposed in this paper is used to study the surface deformation of the city.In the study,time-series InSAR and GNSS technology are used to monitor the surface deformation field in the coastline area of Shenzhen and Hong Kong Special Administrative Region of China.At the same time,a time series of three-dimensional changes at the network reference station in the Hong Kong Special Administrative Region is generated.The results show that there is a significant substitution phenomenon in the reclamation area,especially in the subway construction area and the buildings with shallow foundations in the reclamation area.