基于合成孔径雷达差分干涉测量技术的济南轨道交通1号线地表沉降监测

Detection of Ground Subsidence Deformation on Jinan Rail Transit Line 1 Based on DInSAR Technology

针对传统水准测量点观测的工作量大、易受外界环境影响、观测结果不直观等问题,利用20景Sentinel-1A卫星数据,依托合成孔径雷达差分干涉测量技术的空中遥感、形变敏感度高、微波穿透力强、几乎不受气象制约等特点,对济南轨道交通1号线地表沉降进行监测探究,并与传统精密水准测量数据进行对比分析。结果表明:此方法可直观显示济南轨道交通1号线沿线周围地表沉降情况,且监测结果与传统精密水准测量监测结果间的一致性很高,对轨道交通建设和运营的安全管理、安全预警具有一定的参考意义。

Traditional observation of leveling points suffers problems like enormous workload,vulnerability to the external environment and intuitive observation results.By using the 20 scenes satellite data of Sentinel 1A,the differential synthetic aperture radar interferometry(DInSAR)technology features the characteristics of air remote sensing,high deformation sensitivity,strong penetrating power,almost unaffected by weather constraints,etc.The technology is applied to the monitoring of ground subsidence deformation of Jinan rail transit Line 1,the observed data are compared with traditional precise leveling one.The results show that this method can directly show the surface subsidence along the rail transit Line 1 in Jinan City,the monitoring results are highly consistent with that of the traditional precision leveling monitoring,therefore has referential meaning to the safety management and early warning of rail transit construction and operation.