沿海城市轨道交通线路穿越跨河流桥梁处理方案分析

研究目的：通过对城市轨道交通线路穿越跨河流桥梁的工程处理措施分析，提出合理的、切实可行的处理原则、处理方案。 研究方法：结合具体工程案例，对城市轨道交通地下区段穿越跨河流桥梁的处理方案，进行具体分析。 研究结果：通过方案分析，提出城市轨道交通线路穿越跨河流桥梁的工程处理原则、处理方案。 研究结论：工程处理措施需结合周边环境条件、桥梁结构形式、基础类型、线路线形、纵坡、线位、站位及施工工艺等综合考虑后确定，处理原则为：能绕避不加固，能加固不托换，能托换不拆桥，最后考虑拆除桥梁复建。

Analysis of Treatment Proposal for Urban Rail Transit Line Passing through the Across-river Bridge in the Coastal Areas

Research purposes: By analyzing the treatment measures of urban rail transit line passing through the across-river bridge,the author puts forward the reasonable and feasible treatment principle and proposal.Research methods:Combining with the specific cases of works,a specific analysis has been performed of the treatment proposals for underground section of urban transit system passing through the across-river bridge work.Research results:By analysis of proposal,this paper puts forward the treatment principle and proposal of urban rail transit line passing through the across-river bridge.Research conclusions:The engineering treatment measures should be determined after integrated consideration of surroundings,type of bridge structure,type of foundation,form of route,longitudinal gradient,location of route and location of station as well as construction technology,etc.