重庆东水门长江大桥设计关键技术

发布时间：2018-04-12 13:17

本文选题：公轨两用桥 + 部分斜拉桥　；参考：《桥梁建设》2017年04期

【摘要】：重庆东水门长江大桥主桥为双塔单索面公轨两用半飘浮体系部分斜拉桥,跨径布置为(222.5+445+190.5)m。桥塔采用天梭造型。主梁采用2片桁双层桥面钢桁梁型式,桥面采用板桁组合体系。斜拉索采用单索面稀索体系,每根斜拉索由139束平行钢绞线组成,最大索力15 000kN。索梁锚固采用在钢横梁中点位置设置大型钢锚箱的型式;索塔锚固采用外置式钢锚箱型式,钢锚箱通过剪力钉与分离式塔肢进行连接,索力由剪力钉、锚箱侧拉板和摩擦力共同承担。开发了用于超大吨位钢绞线斜拉索整体张拉的调索设备。开展板桁组合式桥面板的传力机理理论及试验、超大吨位钢绞线斜拉索的疲劳试验、索塔锚固区足尺模型试验等相关研究,验证了结构的安全性和合理性。
[Abstract]:The main bridge of Dongshuimen Yangtze River Bridge in Chongqing is a semi-floating semi-floating cable-stayed bridge with double towers, single cable plane and public rail, and its span is arranged to be 222.5 445 190.5 m.The tower is shaped by sky shuttle.The main girder adopts two pieces of truss double deck steel truss beam, and the deck is composed of plate and truss system.The cable is composed of 139 parallel steel strands, and the maximum cable force is 15000kN.The cable beam anchoring adopts the type of large steel anchor box set at the middle point of the steel crossbeam, and the cable tower anchoring adopts the external steel anchor box type, the steel anchor box is connected with the split tower limb through the shear nail, and the cable force is connected by the shear nail,The side pull plate and friction force of the anchor box are shared.The cable adjusting equipment is developed for the whole cable tension of super large tonnage steel strands.The theory and test of the force transfer mechanism of the plate truss composite deck slab, the fatigue test of the stay cable of super large tonnage steel strand, and the full-scale model test of the cable tower Anchorage zone are carried out to verify the safety and rationality of the structure.
【作者单位】：招商局重庆交通科研设计院有限公司;
【分类号】：U442.5

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