重庆奉节长江大桥斜拉桥主梁安装施工阶段索力监控

Monitoring for Cable Pulling Force during Installation and Construction of Girder of Cable-stayed Bridge in Chongqing Fengjie Yangtze River Bridge

介绍奉节长江大桥大跨径斜拉桥主梁悬浇施工阶段索力测试原理、测试主要内容和方法,并结合理论计算,对该桥梁实测索力进行对比分析和有效监控,确保斜拉桥内力分布合理,满足设计和规范要求,顺利实现预期控制目标,其方法和结果可为同类型桥梁提供参考。

In this paper, the test principle, main test content and method for cable pulling force during rotating east eonstruetion of girder of large - span eable - stayed bridge in Fengjie Yangtze River Bridge are introdueed. In combination with theoretical calculation the comparative analysis and effective monitoring are made for the measured eable pulling force of the bridge, so as to ensure the reasonable distribution of internal force of eable - stayed bridge, meet requirements by design and specification, and favorably realize expected control target. The method and result in this paper can be references for bridges of the same type.