董传洲,汪 帆,龚 磊,严 磊

宜昌市伍家岗长江大桥主跨为1160m双塔钢箱梁悬索桥，主塔上横梁采用牛腿托架法现浇施工，采用塔梁异步施工工艺。主塔上横梁体积大，且位于150m高空，采用落地式钢管支架施工难度大、风险高。上横梁托架采用可周转牛腿，避免了在塔柱内开槽口，施工方便快捷。本文结合宜昌市伍家岗长江大桥上横梁施工实例，介绍了上横梁托架结构及托架安装及整体拆除技术，以及可周转牛腿的应用，可有效节省材料，缩短项目工期，是一种经济合理的方案，可供类似工程参考。

悬索桥；桥塔；上横梁；托架设计；施工

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