PS-InSAR技术在桥梁沉降变形监测中的应用研究

Application of PS-In SAR Technology in Bridge Settlement Deformation Monitoring

北京地区地表不均匀沉降较为严重,为保证桥梁结构安全,有必要对地表沉降变形较严重区域的桥梁沉降变形进行监测。永久散射体合成孔径雷达干涉测量(Persistent Scatterer-Interferometric Synthetic Aperture Radar,PS-InSAR)技术用于桥梁沉降变形监测具有大尺度、分辨率高等特点,同传统方法相比有其优越性。利用TerraSAR-X遥感卫星的SAR影像对桥梁进行沉降变形监测,提取桥梁及附近周围反射明显的PS点,采用PS-In SAR技术对桥梁沉降变形进行研究,研究成果对于PS-InSAR技术用于桥梁变形监测具有一定的参考意义。

Differential settlement of surface is serious in Beijing.In order to ensure the safety of the bridge structure,it is necessary to monitor the subsidence deformation of bridges in the areas with serious settlement deformation.Because of the characteristics of large scale and high resolution for bridge settlement deformation monitoring,Persistent Scatterer-Interferometric Synthetic Aperture Radar(PS-InSAR)technology has advantages compared with traditional methods.The bridge settlement deformation was monitored by SAR image of TerraSAR-X remote sensing satellite to extract the obvious reflection PS points of and around the bridge.The bridge settlement deformation was studied by PS-InSAR technology.The research results have certain guiding significance for application of PS-In-SAR technology in bridge deformation monitoring.