精密单点定位技术的塞文大桥变形监测  

Deformation monitoring of Severn bridge based on precise point positioning technology

作　　者：吴萧楠 何秀凤[1] 何丽娜[1] 唐旭 文援兰 WU Xiaonan;HE Xiufeng;HE Lina;TANG Xu;WEN Yuanlan(Hohai University,Nanjing 211100,China;Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]河海大学,南京211100 [2]南京信息工程大学,南京210044

出　　处：《测绘科学》2020年第11期41-47,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金重点项目(41830110);中央高校基本科研业务费项目(2018B07414)。

摘　　要：精密单点定位(PPP)技术不断的发展及推广,并凭借其独特的优势广泛应用于桥梁变形监测。该文使用精密单点定位技术对英国塞文大桥的悬索及桥塔监测点进行处理,通过对长时间和短时间的监测数据进行解算,分析各监测点的形变时间序列。结果显示,桥梁同一监测点高程方向的形变幅度比横向、径向显著;不同监测点同一方向的变形存在很大程度的一致性,桥梁中点B的变形幅度最为显著。将基于PPP技术与基于双差技术的处理结果进行对比验证,验证了PPP技术应用于桥梁变形监测的可行性,但是和传统的双差技术相比,PPP技术的精度和稳定性还需进一步探讨。For the continuous development and promotion of precise point positioning(PPP)technology,it had many advantages for its application in bridge deformation monitoring.In this paper,the precise point positioning technology was used to process the suspension cable and pylon monitoring points of the Severn bridge in the UK.The deformation time series of each monitoring point were analyzed by solving the long-term and short-time monitoring data.The results showed that the deformation of the bridge in the three directions of the same monitoring point was correlated,while the deformation direction of the elevation direction was more significant than the horizontal and radial directions.There was a great degree of consistency in the deformation of the different monitoring points in the same direction,and the deformation of the midpoint B of the bridge was the most significant.And based on the PPP technology and the double-difference-based processing results,the feasibility of applying PPP technology to bridge deformation monitoring was verified.However,compared with the traditional double-difference technology,the accuracy and stability of PPP technology needed to be improved.

关 键 词：全球卫星导航系统 精密单点定位 桥梁变形监测 监测点分布 

分 类 号：P228[天文地球—大地测量学与测量工程]