北京大兴国际机场高速公路公轨共线段重难点分析

Analysis on Difficulties and Essentials of Expressway,Highway and Urban Track Collinear Section for Beijing Daxing International Airport

为实现北京大兴国际机场2025年旅客流量7 200万人次的设计目标,北京市域内将建成包括轨道交通、城际铁路、高速公路等相关配套工程在内的"五纵两横"交通网络。为解决纵向通道内多线共走廊设计难题,首先对上海、宁波共线位案例进行了分析,然后对北京大兴国际机场高速公路公轨共线段特点进行了总结。在此基础上着重对共走廊段内公路与城市轨道共线位断面选择、竖向控制及交通组织等重难点进行分析研究,从设计指标、交通功能、社会经济效益等方面进行分析评价。结合项目从平面线位、纵断面、横断面等5个方面总结了公路与城市轨道共线位设计经验,可为今后推动多线路协同设计、优化设计、集约设计理念的发展提供借鉴。

To match the design target of 72 million passenger person-time in 2025 of Beijing Daxing International Airport,the"five-vertical and two-horizontal"traffic network including rail transit,intercity railway and expressway will be built within Beijing.In order to solve the design difficulties of multiline common corridor within the longitudinal channel,the cases of collinear sections in Shanghai and Ningbo are analyzed,and then the characteristics of the expressway,highway and urban track collinear section for Beijing Daxing International Airport are summarized.On this basis,the difficulties and essentials in the section selection,vertical control and traffic organization of highway and urban track collinear section within the common corridor are analyzed and studied.The design indexes,traffic functions,social benefits and economic benefits are analyzed and evaluated.Combined with the projects,the design experience of collinear section of highway and urban track projects is summarized from five aspects of plane linear position,vertical section,cross section and the others,which can be referred for promoting the multiline collaborative design,optimization design and intensive design in the future.