芜湖长江大桥主跨钢桁梁斜拉桥跨中合龙施工

Closing of the Cable-stayed Wuhu Yangtze River Bridge Middle Main Span of Steel Truss Beam

芜湖长江大桥为双塔双索面钢桁斜拉桥 ,主跨长 312m。由于没有现成的合龙经验可以借鉴 ,通过全体工作人员的共同努力 ,使其合龙误差成功地控制在了 0 0 75mm以内 ,合龙工期仅为 5天 ,这在中国建设史上是前所未有的。它开辟了大跨度钢桁斜拉桥跨中合龙的先河 ,为以后类似桥梁的合龙提供了宝贵的成功经验。文章详细介绍了该桥主跨跨中合龙的特点、合龙的施工方案以及具体的合龙方法和步骤。

The Wuhu Yangtze River bridge is a cable stayed one with two towers and two cables. The main span measures 312 m. Without ready experience in doing the closing of the bridge, the full staff of the work team took all efforts and succeeded in closing the bridge with an error of 0 075 mm within 5 days, which is an unprecedented event in the bridge construction history in China. This victory provides valuable experience for the closing of similar bridges in the future. The paper describes in detail the features of the closing of the main span, the construction plan and the detailed closing method and procedure.