采用箱形无推力拱桥的石宝大桥设计和施工

Research on Design & Construction of A Box Zero Thrust Arch Bridge: Shibao Bridge

重庆市石宝大桥是一座56.00m+83.50m+56.00m的3孔现浇钢筋混凝土箱形无推力拱桥,采用挂篮悬臂对称浇筑施工。介绍了桥墩上推力相互平衡的无推力拱桥特点。从结构设计角度介绍了桥墩台及基础构造、上部构造。最后就上部建筑介绍了施工步骤和施工要点。

Shibao Bridge is a cast-in-situ reinforced concrete box zero thrust three-arch bridge （56.00 m ＋ 83.50 m ＋ 56.00 m） in Chongqing, with adopting the construction method of cradle cantilever symmetric casting. The balanced thrust feature of zero thrust arch bridge is introduced in the paper. Meanwhile, the pier foundation, basic structure and superstructure are presented from the angle of structural design. Finally, the construction steps and key points of the superstructure are put forward.