无锡地铁1号线跨沪宁高速公路方案设计

摘要

Research purposes; The shanghai - Nanjing expressway is an important traffic artery. The factors of thebridge function, landscape and vehicle driving would be considered in the design of Line 1 of Wuxi metro crossing theShanghai - Nanjing expressway while the feasibility of the bridge crossing the expressway also could be considered. Asthe key project of Wuxi, a feasible design scheme can get good social and economic benefits.Research conclusions;This paper analyzes the advantages and disadvantages of the steel girder, continuous girder andsteel truss girder,compares the advantages and disadvantages of all schemes in the fields of the construction difficulty,influence on the traffic and engineering cost etc, and determines to use the continuous girder bridge by rotationconstruction, which is the most suitable bridge type for this project. This scheme satisfies the track usage conditions withfeatures of the small influence on the traffic, low engineering cost, simple construction and a little maintenance cost,having good social and economic benefits.%研究目的:沪宁高速公路是重要的交通动脉,无锡地铁1号线跨沪宁高速公路桥梁方案的设计要综合考虑桥梁的功能、景观、车辆通行等因素；同时,还要考虑桥梁跨越沪宁高速公路的可行性.作为无锡市的重点工程,选择一个切实可行的方案具有较好的社会效益和经济效益.研究结论:文章分析了钢箱梁、连续梁、钢桁梁3种桥型的优缺点,从施工难度、对交通的影响、工程造价等方面对比各方案的优劣,确定了转体施工连续梁是最适合本项目的桥跨型式.该方案满足线路的使用条件,对交通的影响较小,造价较低,施工简单,后期养护维修费用少,具有较好的社会效益和经济效益.