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三峡大坝泄 1～ 2 3号坝段 45m高程施工栈桥 ,承担着初期大坝混凝土浇筑、辅助构件转运以及金结安装等工作。栈桥总长 480m ,最大高度约 40m ,最大跨度 2 1.2m。为了满足大坝施工布置及运用要求 ,上部结构由门、塔机轨道梁、纵横联等组成 ,轨道梁为等直简支全焊钢箱梁 ;下部结构采取两种方案 ,即泄 13号坝段以左为钢桥墩 ,以右为混凝土桥墩。通过结构分析计算 ,其整体承载力和构件强度均满足设计要求 ,经过 1a多的运行表明 ,施工栈桥各项功能指标均达到施工要求。
Three Gorges Dam 1 to 23 dam 45m elevation construction trestle, undertaking the initial dam concrete pouring, auxiliary components and the installation of gold knot installation work. Trestle total length of 480m, the maximum height of about 40m, the maximum span of 2 1.2m. In order to meet the dam construction layout and application requirements, the superstructure consists of doors, tower crane track girder, vertical and horizontal joint and so on. The track girder is an isonly simply supported fully welded steel box girder. The lower structure adopts two schemes: The left section of steel piers, to the right for concrete piers. Through structural analysis and calculation, the overall bearing capacity and component strength meet the design requirements. After more than one year of operation, all the functional indexes of the construction trestle have reached the construction requirements.