白沙河大桥总体设计

Overall Design of Baisha Bridge

摘要:

白沙河大桥为广佛大桥系统工程（一期）项目的重要节点，位于广佛交界、广佛同城化的中心规划地区，考虑通航、防洪和河道疏浚等多方面因素，白沙河特大桥采用120 m+158 m独塔非对称钢混组合梁斜拉桥。该桥采用纵向人字形主塔，塔高100.5 m，桥面以上塔高74.9 m，为塔、梁固结的结构体系，主塔下部为混凝土段，上部为钢结构，中间设置钢混结合段。主梁采用钢混组合梁，标准桥宽40.2 m，左、右幅分别为单箱单室钢箱梁，上铺预制混凝土桥面板，中间采用钢横梁连接。斜拉索采用中央双索面，边跨索距8 m，主跨索距12 m，塔上锚索间距2 m。白沙河大桥整体造型优美，对实现广佛同城化具有重要意义。

Abstract:

As an important node of Guangfo Bridge System Engineering (Phase Ⅰ) Project, Baisha Bridge is located in the central planned area of the Guangzhou-Foshan border and the Guangzhou-Foshan urban integration. Considering the navigation, flood control, river dredging and other factors, Baisha Bridge is an asymmetric single-pylon steel-concrete composite girder cable-stayed bridge with the spans 120 m+150 m. The bridge features a longitudinal herringbone main pylon, and the pylon height is 100.5 m. The pylon above the bridge deck is 74.9 m high and is a structural system with the pylon and beam consolidated. The lower part of the pylon is concrete and the upper part of pylon is steel, with a steel-concrete composite section in the middle. The main girder is a steel-concrete composite girder. The standard bridge width is 40.2 m. The left and right widths are respectively single-box single-chamber steel box girders. The prefabricated concrete bridge deck is laid on top, and the middle part is connected by steel crossbeams. The stayed cable is the central double cable planes. The cable distance of side span is 8 m, the cable distance of the main span is 12 m, and the pylon anchor cable spacing is 2 m. The overall shape of Baisha Bridge is beautiful, which is of great significance to realize the urban integration of Guangzhou and Foshan.