基于SBAS-InSAR技术的港口地表二维形变监测与分析

Monitoring and Analysis of Port Surface Two-Dimensional Deformation Based on SBAS-InSAR Technology

为了大范围监测果园港港口地表形变情况,预防地面沉降和塌陷所带来的危害,采集2014年11月—2017年11月果园港升轨和降轨的Sentinel-1A号数据,应用SBAS-InSAR技术进行地表形变数据提取与分析。结果表明:得到的垂直方向地表形变变化趋势与水准测量结果相一致;果园港地表垂直方向形变速率为-33.49~13.49 mm·a^(-1),东西方向形变速率为-16.16~29.44 mm·a^(-1);大幅度沉降主要发生在港口的堆场区和交通枢纽处,且沉降速率与距交通线路的距离呈现显著相关。

In order to comprehensively monitor the surface deformation of ports and prevent hazards caused by ground subsidence and collapse,Sentinel-1A data of orbit ascending and descending in Guoyuan port from November 2014 to November 2017 were collected,and SBAS-InSAR is applied to monitoring and analyzing the ground deformation.The results show that the observed subsidence trend is consistent with leveling measurements;the vertical surface deformation rate in Guoyuan Port is in the range of-33.49 to 13.49 mm·a^(-1),and the east-west surface deformation rate is in the range of-16.16 to 29.44 mm·a^(-1).The large-scale subsidence primarily occurred in the port s stacking area and traffic hub,and the settlement rate is significantly correlated with the distance from the traffic line.