双肋闭口薄壁箱在大跨度转体拱桥中的应用

Application of Double-Ribbed Closed Thin-Wall Box in Long-Span Swivel Arch Bridge

有平衡重转体是我国山区大跨度拱桥建设中应用较为普遍的施工方式之一,转体桥为了向大跨度发展尽可能实现转体结构轻型化。依托湖北巴东小溪河大桥工程,在设计阶段对比分析各种形式的转体结构优缺点,探讨双肋闭口薄壁箱在大跨度转体拱桥中的应用,为类似桥型的设计提供参考。

Swivel with counterweight is one of the common construction methods in the construction of long-span arch bridges in mountainous areas of China.The swivel bridge should be light-weight structure in order to be long-span bridge.Based on the project of Xiaoxi River Bridge in Badong,Hubei Province,the paper compares and analyzes the advantages and disadvantages of various forms of swivel structure in the design stage,and discusses the application of double-ribbed closed thin-wall box in long-span swivel arch bridge,so as to provide the reference for similar bridge design.