利用多InSAR技术分析某天然气管道填方区形变

Deformation Analysis of a Natural Gas Pipeline Filling Area by Multi-InSAR Technology

针对某天然气管道K724+580高铁检修站高填方区的实际情况,使用Sentinel-1A高分辨率合成孔径雷达(synthetic aperture radar,SAR)影像数据,采用永久散射体合成孔径雷达干涉测量(permanent scatterer interferometric synthetic aperture radar,PS-InSAR)、短基线子集合成孔径雷达干涉测量(small baseline subset InSAR,SBAS-InSAR)、差分合成孔径雷达干涉测量(differential InSAR,D-InSAR)技术提取填方区2018-06-21—2019-05-11间的形变信息。结果表明,2018-11-24—2019-05-11期间填方区有明显形变,在降雨、人工扰动、地震等外因作用下,有发生浅表层滑塌的风险。

In view of the actual situation of the high-speed rail maintenance station near a natural gas pipeline K724+580,we use permanent scatterer interferometric synthetic aperture radar(PS-InSAR),small baseline subset InSAR(SBAS-InSAR),and differential InSAR(D-InSAR)techniques to extract the deformation information of the filling area from Sentinel-1A high-resolution SAR image data obtained from June21,2018 to May 11,2019. The results show that there is an obvious deformation in the filling area during the period of November 24,2018 to May 11,2019. External factors such as rainfall,artificial disturbance and earthquake,will cause the risk of shallow surface collapse.