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钢箱梁桥具有抗扭刚度大、整体性好、外形简洁流畅等优点,已成为大跨度主梁结构形式首选,昆明市福海立交桥一次同时跨越沪昆铁路和南过境高架桥,在城市中心复杂施工环境下,首次采用500t单台履带吊现场吊装重250t、长47m、宽13.9m的弯(半径55m)、坡、斜钢箱梁的施工技术,实现了不中断交通钢箱梁一次性准确、安全吊装就位,取得了较好效果。
The steel box girder bridge has the advantages of large torsional rigidity, good integrity and concise appearance. It has become the first choice of long-span main beam structure. Kunming Fuhai Flyover crosses the Shanghai-Kunming Railway and the south transit viaduct at the same time, and the complex construction in the city center Environment, for the first time, the construction technology of a single crawler crane with a lifting capacity of 250t, a length of 47m and a width of 13.9m (radius of 55m) and inclined and inclined steel box girders is adopted for the first time. Safe lifting in place, achieved good results.