【摘要】 地铁的建设与营运会产生沿线的长期持续形变,从而引发地面沉降。本文以南昌市运营中的1、2号线以及在建地铁沿线为研究对象,基于研究区内的26景Sentinel-1A数据和DEM数据,采用了小基线集(Small Baseline Subset,SBAS)时间序列技术,获取了研究区内地表的形变速率与累计形变量。实验结果表明,地铁沿线范围内整体呈现沉降趋势,沉降速率在-2 mm/year～-17mm/year之间,局部区域出现地面抬升情况,累计抬升65.53mm。通过分析时序结果变化以及沉降发生的地理空间分布,推断地铁高速运行产生的地面载荷是地面沉降发生的主要因素。更多还原

【Abstract】 The construction and operation of metro will produce long-term continuous deformation along the line,which will lead to land subsidence.This paper takes Nanchang city operation in1,line 2,as well as in the construction of metro line as the research object,the study area of the 26 scene Sentinel-1 A data and DEM data based on the Small Baseline Subset(SBAS)time series technology,obtain the deformation in the study area of surface deformation and cumulative rate.The experimental results show that the whole area along the Metro shows a trend of subsidence.The subsidence rate is between-2 mm/year～-17 mm/year,and the ground uplift occurs in some areas,with a cumulative uplift of 65.53 mm.By analyzing the change of time series and the geospatial distribution of settlement,it is concluded that the ground load caused by high-speed operation of Metro is the main factor of land subsidence.更多还原