宜城汗江桥位于湖北省宜城县,为中国首次采用双支座支承的预应力混凝土连续梁桥。桥全长1887m,主桥分跨为55+4x100+55(m);桥宽12m。采用这种支承结构,施工是梁与墩不需临时固结,且可降低支座处的弯矩与剪力,设计中不需考虑体系转换。主墩采用4桩框架墩,既不设为防护三级航道上的船舶撞击设有漂浮式柔性防撞圈套在墩柱上,可随水位升降,属国内首创。主孔梁采用悬臂浇筑法施工,边孔采用拖拉就位合拢工艺。于1990年10月建成。
交通部第二公路勘察设计院设计,交通部第二公路工程局第一工程处施工。
Location: Yichang, Hubei Prov.
Main span: 100m
· P.C. continuous box girder firstly adopting double bearings in China
· Bridge spans: 55+4×100+55(m)
· Erected by cantilever casting
Completed in Oct.1990
Designed by the 2nd Highway Survey and Design Institute, Ministry of Communications
Constructed by the 2nd Highway Engineering Bureau, Ministry of Communications