牛角坪双线特大桥桥式方案研究

研究目的：结合线路、地形、地质情况,对牛角坪大桥提出较为合理的桥式方案。研究方法：通过对不同桥式方案的静动力特性研究,结合投资分析,提出较为合理的桥式方案。研究结果：进行了主跨256m钢桁拱,主跨256m钢管混凝土拱,主跨（110＋192＋110）m预应力混凝土连续刚构,主跨（144＋192＋144）m下承式连续钢桁梁研究。研究结论：大跨铁路桥梁,采用轻型梁部结构的上承式拱桥方案,动力特性较易满足。高墩大跨铁路梁式桥,采用轻型的梁部结构,动力特性相对较好;采用混凝土梁部结构,经济上较省。

Bridge Types Research on the Niujiaoping Major Double Track Bridge

Research purposes:Gives the best bridge types of NiuJiaoPing major double track bridge,and studys various possible bridge types by considerations of the factors of road bridge site,landform and geological survey.Research methods:Giving the best bridge type through the dynamic behavior analysis and investment analysis of the different bridge types.Research results:The research achievements consist of these bridge types:256 m steel truss arch,256 m steel pipe concrete arch,(110 192 119) m prestressed concrete continual rigid frame and(144 192 144) m bottom-road bridge continual steel braced girder.Research conclusions:To long span railway bridge,the dynamic behavior of deck arch bridge with light beam structure is easy to meet with.To railway continuous beam bridge with long span and high pier,the dynamic behavior is better when using light beam structure;using concrete beam structure is more economic.