郑州至西安铁路客运专线提篮拱桥结构设计特点

摘要

尼尔森体系提篮拱桥造型美观，可一孔简支，主桥短，建筑高度低，跨越能力强，结构的竖、横向刚度大，适应整体桥面，造价经济，施工养护方便，设计成系列孔跨应用到铁路客运专线前景广阔，经济和社会效益显著。文中从国内外拱桥的现状出发，介绍了尼尔森提篮拱特征，并结合工程实例介绍了尼尔森提篮拱的构造设计。%Nielsen system basket arch bridge has attractive appearance and can be designed as a single-span bridge that will be simply supported.The length of main bridge of the type of the arch bridge is short,building height is low,spanning capacity is great,vertical and lateral stiffness of the structure is strong,and the bridge is also adapt to the overall bridge deck,cost-effectiveness,easy construction and maintenance.If the bridge is designed to have series of span of different length for selection and applied to the passenger dedicated railway line,it will have wide vista of application and the economic and social benefits will be significant.From the present situation of the arch bridge at home and a-broad,this paper introduces the characteristics and structure of nelson basket handle arch combined with an engineering example.