自锚式悬索桥主缆架设监控

Main Cable Erection Monitoring of Self-anchored Suspension Bridge

自锚式悬索桥在缆索体系施工过程中,主缆线形控制贯穿整个施工过程。主缆架设作为主缆线形控制的首要环节直接影响着主缆线形能否达到设计要求。以浙江中湖大桥主缆架设为例,论述了主缆空缆线形各控制点的确定方法及处理措施;对比标准状态下解析法与有限元法计算主缆空缆线形结果;研究了无应力索长、跨度、温度对索股垂度的影响,以便快速、精准地确定基准索股线形。

The main cable shape control is throughout the entire process of cable systems construction of self-anchored suspension bridge. As the primary part of main cable shape control,the erection of main cable has a direct influence on whether the main cable shape can meet the design requirements. This paper discussed the methods and treatment measures to determine the main cable shape of the key points based on the main cable erection of Zhonghu bridge in Zhejiang province.The calculated results of empty cable shape obtained by standard state analytic method and finite element method had been compared with each other. Finally,for the purpose of ascertain the datum strand shape rapidly and accurately,the influence of unstressed cable length,span,temperature on cable strand sag had been discussed.