南淝河大跨系杆拱桥设计与关键技术

Brief Analysis on Design and Key Technology of Long-span Bowstring Arch Bridge of Nanfei River

南淝河大桥采用下承式钢箱提篮式系杆拱结构,跨径200 m。详细介绍了该桥结构设计与参数取值,浅析了拱肋侧倾角、矢跨比、横撑形式及刚度对整体稳定性的影响,并简要阐述了施工方案的选择思路。以该桥作为工程案例,与国内已建提篮式系杆拱桥相比较,具有一定的创新性,为后续类似桥梁的建设提供了借鉴。

Nanfei River Bridge is a 200 m-span through steel-box basket-type bowstring arch bridge.The structural design and parameter valuing of this bridge are introduced in detail.The influences of the arch rib lateral inclination,rise span ration,cross-brace form and stiffness on the overall stability are briefly analyzed.The selection thinking of the construction scheme is briefly expounded.Taking this bridge as an engineering case,it has the certain innovation compared with the built basket-type bowstring arch bridges in China,which can be referred for the construction of the similar bridges in future.