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南宁大桥,是目前世界上最大跨度的外倾式非对称曲线肋拱桥。主拱采用钢—混凝土混合箱形截面,其强度、刚度、延性、抗震性、耐久性将比普通钢梁大幅度提高,而冲击系数降低;主梁采用曲线钢箱,轻巧美观;拉索采用横向双吊杆,施工方便、结构安全、易于更换;整体造型在国内外属于首创。本文介绍其主跨300米钢拱桥施工关键技术。
Nanning Bridge, is the world’s largest span of the incline asymmetric curved rib arch bridge. The main arch adopts the steel-concrete mixed box section, whose strength, rigidity, ductility, seismic resistance and durability will be greatly increased compared with the ordinary steel beam and the impact coefficient will be reduced. The main beam adopts the curved steel box, which is light and beautiful; Horizontal double boom, construction convenience, structural safety, easy to replace; the overall shape is the first at home and abroad. This article describes the key technology of the construction of its 300 meters steel arch bridge.