【作者】 黄卿维； 陈宝春；

【Author】 HUANG Qing-wei CHEN Bao-chun (Civil Engineering College,Fuzhou University,Fuzhou 350002,China)

【机构】 福州大学土木工程学院；

【摘要】 由于结构自重大、施工架设困难,混凝土拱桥的发展受到了制约,近年来修建的数量呈下降趋势.为此,提出了波形钢腹板-混凝土拱桥新构思.该桥型是用波形钢板代替拱圈中的混凝土腹板,从而减轻拱圈自重,方便施工,为混凝土拱桥向更大跨度发展提供可能.以已建成的重庆万州长江大桥(净跨420m)和在建的福建宁德岭兜大桥(净跨160m)为原型,进行波形钢腹板-混凝土拱桥的试设计,对该新桥型采用劲性骨架法与斜拉悬臂法施工进行了探讨.初步分析结果表明,与原桥相比,试设计拱桥可减轻拱圈自重30%左右,降低了对基础与下部结构的要求,免除了布设腹板钢筋、模板,浇筑混凝土等施工工序,加快了施工进程, 缩短了工期,具有相当的可行性.更多还原

【Abstract】 The development of concrete arch bridge is limited by its heavy self-weight and the difficult erec- tion,so there are few concrete arch bridges built in recent years.This paper presents an innovative conception on concrete arch bridge design,in which corrugated steel web is used to substitute the concrete web in arch ring.Compared with concrete arch bridge,the arch self-weight can be lightened,and the construction can be simplified,moreover,it makes the larger span concrete arch bridge possible.Taking the built Chongqin Wanzhou Yangtze River Bridge with a clear span of 420m and the Ningde Lingdou Bridge with clear span of 160m under construction as prototype,two trail designs of concrete arch bridge with corrugated steel webs are carried out.The construction methods of embedded falsework method and cantilever method are discussed in the trial designs.Analysis results show that the self-weight of the arch ring is reduced by about 30% in the trial design.It proves that the trial design is feasible for it will lead to the lower requirements for the foundation and substructure,the construction procedure will be greatly simplified and construction time will be saved.更多还原