长春市InSAR地表沉降与交通基础设施形变监测分析
InSAR Ground Subsidence Monitoring in Changchun City and Deformation Analysis of Traffic Infrastructure

城市发展过程中的大规模建筑施工和地下工程易造成地表沉降，甚至引发地下空洞和路面坍塌等严重问题，对交通基础设施的威胁极为显著。针对近年来新兴发展城市的地表沉降监测与交通基础设施稳定性分析，以长春市为典型研究区域，基于Sentinel-1B卫星2017年~2021年间的109景C波段SAR影像，基于NPS-InSAR技术开展了长春市近4年来的地表形变监测及演化状况分析。针对长春市交通网络沿线的差异性形变分布特征，依据交通基础设施的类型开展了归因性讨论。实验表明：长春市中东部区域整体较为稳定，城市的外围区域存在差异性形变。相关研究数据可为城市交通基础设施运营维护与区域性工程监测提供参考。
Large-scale construction and underground engineering in the process of urban development tend to cause surface settlement, and even lead to serious problems such as underground cavity and road collapse, which pose a very significant threat to transportation infrastructure. In this paper, the surface subsidence monitoring and transportation infrastructure stability analysis of newly developed cities in recent years are analyzed. Changchun city is taken as a typical research area, and 109 C-band SAR images of sentinel-1B satellite from 2017 to 2021 are obtained. Based on the NPS-InSAR technology, the surface deformation monitoring and evolution of Changchun city in recent 4 years were carried out. On the basis of this, attribution discussion is carried out according to the types of transportation infrastructure according to the distribution characteristics of differential settlement along the transportation network in Changchun. The experimental results show that the central and eastern regions of Changchun are relatively stable as a whole, and there is differential subsidence in the peripheral areas of the city. Relevant research data can provide reference for transportation infrastructure operation and maintenance and regional engineering monitoring.