基于时序InSAR技术的南京市地铁沿线沉降监测分析  

Analysis of settlement monitoring along the metro line in Nanjing based on time series InSAR technology

作　　者：乔申 孙承志 毕凌宇 QIAO Shen;SUN Chengzhi;BI Lingyu(School of Remote Sensing and Surveying and Mapping Engineering,Nanjing University of Information Engineering,Nanjing 210044,China)

机构地区：[1]南京信息工程大学遥感与测绘工程学院,江苏南京210044

出　　处：《测绘通报》2024年第10期64-70,共7页Bulletin of Surveying and Mapping

基　　金：高分专项航空观测系统“高分航空载荷自然资源调查应用示范”(04-H30G01-9001-20/22)。

摘　　要：近年来南京市新增多条地铁线路,为探究地铁建设及运营中造成沿线及周边区域沉降的隐患问题,本文利用时序InSAR技术获取了南京市区沉降速率场、累计沉降量和沉降时间序列,并结合降水数据研究对沉降区的影响,对地铁线路的典型沉降区及其周围进行了详细分析。研究结果表明,南京市呈现不均匀沉降,位于长江漫滩区,集中在江宁区沿岸、建邺区、鼓楼区等市中心区域,其中浦口区中部沿岸沉降最为明显,年沉降量最高达-55.9 mm,面积约15.6 km^(2);地铁2、4、7、10号线部分线路沉降较为明显,以浦口区的定山大街与临江·青奥体育公园站为例,累计沉降量最高为-172.8 mm;南京市地铁沿线沉降速率与降水量存在关系,受强降雨影响,土壤中孔隙水和其中所含的气体孔隙压力增加从而影响沉降。In recent years,several new subway lines have been added in Nanjing,in order to explore the hidden problems of subsidence along the lines and surrounding areas caused by subway construction and operation,this paper utilizes the time series InSAR technique to obtain the subsidence rate field,cumulative subsidence and time series of subsidence in Nanjing,combines with the precipitation data to study the influence on the subsidence area,and conducts a detailed analysis of the typical subsidence areas of subway lines and their surroundings.The study shows that:Nanjing presents uneven subsidence,located in the Yangtze River diffuse zone,concentrated in the city center areas such as the coast of Jiangning district,Jianye district,Gulou district,etc.,in which the subsidence is the most obvious along the central coast of Pukou district,with the highest annual subsidence of-55.9 mm,covering an area of about 15.6 km^(2);the subsidence of some lines of Metro Lines 2,4,7,and 10 is more obvious,and in the case of the Tingshan street in Pukou district and the Linjiang-Qingyao Sports park station in Pukou district for example,the highest cumulative settlement of-172.8 mm;There is a relationship between Nanjing subway along the rate of settlement and precipitation.Under the impact of heavy rainfall,the pore water in the soil and the pore pressure of the gas contained increases to affect the settlement.

关 键 词：时序InSAR 南京市 沉降速率 地铁 

分 类 号：P237[天文地球—摄影测量与遥感]