短基线集干涉技术对北京市地铁沿线沉降监测

Using a Short Baseline Interferometry Technique for Monitoring Sedimentation Along the Beijing Subway

近些年,随着人类活动越来越频繁,对城市地区地表沉降的研究越来越多。短基线集InSAR(SBAS-InSAR)技术相比于传统InSAR技术,减小了空间去相关及地形误差的影响,已广泛应用于地表沉降监测的研究中。本文基于SBAS-InSAR技术,对地铁沿线地表沉降进行监测研究。基于北京地区Cosmo影像(2009年-2011年)、TerraSAR影像(2011年-2014年)和哨兵1号影像(2016年-2017年),以北京市地铁4号线北京南站-马家堡站-角门西站路段为例,利用SBAS-InSAR方法获取到该线路段的地表平均形变速率,揭示了该地铁沿线从2009年到2017年的地表形变情况;并对最大形变区域进行形变时序分析。最后,根据历史调研资料进行验证分析产生较大形变的原因。

In recent years,with more frequent human activities,more and more researches are on urban ground deformation.Compared to traditional interferometricSAR(InSAR)technology,small-baseline subset interferometric SAR(SBAS-InSAR)reduces the influence of space and topographic error,and it has been widely used in the study of ground deformation monitoring.This paper makes a research on surface deformation along subway based on SBAS-InSAR technique.the Cosmo images(from2009to2011),TerraSAR images(from2011to2014)and Sentinel-1images(from2016to2017)are used,and this paper take the Subway Line4section Beijing south station-Majiapu station-Jiaomenxi station as the study area and get the surface average deformation rate by SBAS-InSAR method.This paper reveals the surface deformation of the study area from2009to2017and analyzes the deformation time series of maximum deformation zones.Finally,this paper verifies and analyzes the large deformation area according to historical survey data.