基于时序InSAR技术监测大桥历史形变

2019-06-14,河源市源城区东江大桥第三跨第二桥墩以及第四跨第三桥墩出现了垮塌,此次事故造成了人员伤亡和重大经济损失.为了分析此次灾害事故发生发展的成因,本研究获取了Sentinel-1A雷达卫星2018年12月至2019年6月的历史影像数据,基于时序InSAR技术手段处理得到了该监测时间段内的历史形变信息.研究...

Monitoring the historical deformation of bridge based on time series InSAR technology

On June 14,2019,the Dongjiang Bridge in Yuancheng District of Heyuan City collapsed on the third and second spans of the third pier and the third span of the fourth span,which caused casualties and significant losses of economic.In order to analyze the cause of the disaster,the historical image data of Sentinel-1A radar satellite from December 2018 to June 2019 were obtained,and historical deformation information during the monitoring period was obtained based on time series InSAR technology.The research result shows that the bridge is stable under this time background,and there is no obvious trend of deformation characteristics.Based on field observations of the incident bridge,and combined with various research data,it is inferred that the cause of the collapse of the bridge is a sudden factor,such as the impact of an object or the erosion of a current.The research result in this paper can provide theoretical basis for the monitoring and early warning work of bridge infrastructure in the future.