基于角反射器的越江大桥InSAR形变监测方法研究  

InSAR deformation monitoring method of cross-river bridge based on corner reflector

作　　者：吴铭飞 Wu Mingfei(Shanghai Urban Operation(Group)Co.,Ltd.,Shanghai 200023,China)

机构地区：[1]上海城建城市运营(集团)有限公司,上海200023

出　　处：《江苏科技信息》2023年第11期60-63,共4页Jiangsu Science and Technology Information

摘　　要：星载InSAR技术具有获取地表大范围、高精度形变位移信息的能力,已经成为对地形变观测的有效技术手段之一。文章将C波段SAR影像用于越江大桥形变监测,利用角反射器提高监测结果可靠性与精度。以上海长江大桥作为监测对象,在大桥主桥和邻近区域安装4台角反射器,采用大桥区域时间跨度2020年9月至2022年3月的Sentinel-1A卫星影像,通过多时相InSAR分析技术,获得了角反射器所在位置大桥形变速率与时序变化情况。研究结果表明,本文提出的基于角反射器的越江大桥InSAR形变监测方法可以实现越江大桥高精度形变监测。Spaceborne InSAR technology has the ability to acquire large-scale and high-precision surface deformation and displacement information,and has become one of the effective technical means for terrain deformation observation.In this paper,C-band SAR images are used to monitor the deformation of the cross-river bridge,and corner reflectors are used to improve the reliability and accuracy of the monitoring results.Shanghai Yangtze River Bridge is used as the monitoring object,and four corner reflectors are installed on the main bridge and around the adjacent area of the bridge.Using the Sentinel-1A satellite images of the bridge area with time span from September 2020 to March 2022,the deformation rate and timing changes of the bridge at the position of the corner reflector are obtained based on the multi-temporal InSAR analysis technology.The research result shows that the InSAR deformation monitoring method of the cross-river bridge based on the corner reflector proposed in this paper can realize high-precision deformation monitoring of the cross-river bridge.

关 键 词：INSAR 角反射器 越江桥梁 形变监测 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]