摘要
为分析填海新区沉降特征与原因,本文利用2020年1月-2021年10月期间的22景Sentinel-1A影像,基于SBAS-InSAR技术,获取了上海市南汇新城的地表沉降信息。并分析沉降时空变化特征,最后基于不同极化方式对监测结果进行交叉验证。结果显示:研究区内整体趋于平稳,形变速率集中在-4.6~2.3 mm/a;形变最严重区域位于滴水湖附近,最大沉降速率为-27.8 mm/a。沉降主要位于填海区,且呈现自西向东逐渐增强的不均匀沉降趋势,区域内的沉降主要与建筑设施荷载及吹填土自身压缩固结有关。
In order to analyze the characteristics and causes of subsidence in the new reclaimed area,22-view Sentinel-1A images from January 2020 to October 2021 were used in this paper to obtain the surface subsidence information of Nanhui New City in Shanghai based on SBAS-InSAR technology,and analysing the temporal and spatial variation characteristics of sedimentation.Finally,using different polarization modes tocross-validatethe monitoring results.The results show that the whole study area tends to be stable,and the deformation rate is concentrated in-4.6~2.3mm/a.The most severe deformation area is located near the Dishui Lake,with a maximum subsidence rate of-27.8mm/a.The subsidence is mainly located in the reclamation area,and shows an uneven subsidence trend that gradually increases from west to east,the settlement in the area is mainly related to the load of building facilities and the compression consolidation of blow fill.
作者
聂运菊
熊倩
计玉芳
汪博军
NIE Yunju;XIONG Qian;JI Yufang;WANG Bojun(School of Surveying and Mapping Engineering,East China University of Technology,Nanchang 330013,China)
出处
《城市勘测》
2023年第3期71-75,共5页
Urban Geotechnical Investigation & Surveying
基金
国家自然科学基金资助项目(41861052)。
