公轨两用悬索桥基准索股施工监测与控制  

Construction monitoring and control of benchmark cable strand of highwaytrack suspension bridge

作　　者：石勇 熊桂开 谢征海 刘新凡 易佳 张西军[4] SHI Yong;XIONG Guikai;XIE Zhenghai;LIU Xinfan;YI Jia;ZHANG Xijun(Chongqing Institute of Surveying and Mapping Science and Technology,Chongqing 401121,China;Technology Innovation Center for Spatiotemporal Information and Equipment of Intelligent City,Ministry of Natural Resources,Chongqing 401121;Chongqing Rail Way Group Co.,Ltd.,Chongqing 401121,China;Shenyang Geotechnical Investigation&Surveying Research Institute Co.,Ltd.,Shenyang,Liaoning 110004,China)

机构地区：[1]重庆市测绘科学技术研究院,重庆401121 [2]自然资源部智能城市与时空信息工程技术创新中心,重庆401121 [3]重庆市铁路(集团)有限公司,重庆401121 [4]沈阳市勘察测绘研究院有限公司,辽宁沈阳110004

出　　处：《测绘技术装备》2023年第4期105-110,共6页Geomatics Technology and Equipment

基　　金：重庆市科技计划项目:山地生态城市建设智慧空间信息技术体系研究及应用(cstc2022ycjh-bgzxm0229)。

摘　　要：大跨径悬索桥基准索股架设精度影响主缆线型,必须采取多种测量控制措施,提高基准索股架设精度。本文以重庆市某公轨两用悬索桥为例,详细介绍了基准索股架设的监测控制方法,从建立桥梁施工控制网的精度,独立坐标系与桥梁系间的坐标转换及基准索股特殊测量装置的角度,对大气折光系数进行反演,并进行球气差修正,计算基准索股的绝对垂度。监测结果表明,大气折光对单向三角高程测量影响较大,必须进行修正。采用本文方法修正后,可使监测结果达到《公路桥涵施工技术规范》规定的精度要求,满足大桥施工需求。The installation of benchmark cable strands in largespan suspension bridges will affect the main cable shape,hence multiple measurement control measures must be taken to improve the accuracy of benchmark cable strand installation.This paper introduces the monitoring and control method of the benchmark cable strand in details by taking a highwaytrack suspension bridge in Chongqing City as an example.The atmospheric refraction coefficient is retrieved and the absolute sag of the reference cable strands is corrected by the spherical air difference from the perspectives of the bridge construction control network accuracy,the coordinate conversion between the independent coordinate system and the bridge system,and the angle of the special measurement device of the reference cable strands.The results showed that the monitoring results from the modified method proposed in this paper can get the specified precision and meet the construction requirements of the bridge.

关 键 词：公轨两用悬索桥 基准索股 大气折光 施工监测 

分 类 号：U442.4[建筑科学—桥梁与隧道工程]