摘要
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。研究成果显示该桥梁在此数据获取时间段处于相对稳固状态,并无明显的形变特征趋势。通过对事发桥梁进行实地观测,结合了各类研究资料推断该桥梁垮塌的成因机理为突发因素,例如物体撞击或者水流的冲刷造成。文中研究成果可以为今后桥梁类基础设施的监测预警工作提供应用实践。
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.
作者
陈艳青
赵景堂
CHEN Yanqing;ZHAO Jingtang(Xining Surveying and Mapping Institute, Xining 810001, China;Nantong Tuorpu Surveying and Mapping Co. Ltd,Nantong 226300,China)
出处
《测绘工程》
CSCD
2021年第2期50-54,59,共6页
Engineering of Surveying and Mapping
关键词
桥梁垮塌
时间序列
INSAR
形变监测
机理分析
bridge collapse
time series
InSAR
deformation monitoring
mechanism analysis
