基于GB-RAR的高速铁路桥梁变形监测研究  

Research on Deformation Monitoring of High-Speed Railway Bridge on GB-RAR

作　　者：赵予璋 ZHAO Yuzhang(Shanghai Tonglan Survey Co.,Ltd.,Shanghai,201315 China)

机构地区：[1]上海同澜勘测有限公司,上海201315

出　　处：《科技资讯》2024年第16期154-156,共3页Science & Technology Information

摘　　要：提出一种地基真孔径雷达(Ground-Based Real Aperture Radar,GB-RAR)变形信息估计方法,将该方法应用于上海某地铁线路盾构隧道下穿E大桥的安全监测与分析。基于GB-RAR数据进行分析推导,得到桥梁的沉降变形时间序列,并通过水准测量进行了验证,精度优于0.27 mm。通过功率谱分析和最大似然估计,去除彩色噪声比,不考虑彩色噪声影响的变形监测信息更准确,与水准测量结果更加吻合。研究结果表明,该方法在本次工作中具有可靠性和有效性,桥梁在监测期内稳定、安全。Ground-Based Real Aperture Radar(GB-RAR)deformation information estimation method is proposed in this article,and it is applied to the safety monitoring and analysis of a shield tunnel under the E bridge of a subway line in Shanghai.The settlement deformation time series of the bridge is analyzed and derived based on GB-RAR,and it is verified by leveling measurement at an accuracy better than 0.27 mm.By using Power Spectrum Analysis and Maximum Likelihood Estimation,removing color noise is more accurate than not considering the influence of color noise on deformation monitoring information,and is more consistent with leveling measurement results.The research results shows that the reliability and effectiveness of the method in this work,and the bridge is stable and safe during the monitoring period.

关 键 词：高速铁路 沉降 变形监测 地基真孔径雷达 

分 类 号：U446[建筑科学—桥梁与隧道工程] U448.13[交通运输工程—道路与铁道工程]