市域铁路与城市快速路共建结构方案研究

Structural Scheme for Co-construction of Suburban Railway and Urban Expressway

随着城市发展,土地资源越来越紧张,市域铁路与快速路合建可节约用地,减少拆迁成本、满足城市景观需求。从结构设计、施工便捷与工程投资方面分析市域铁路区间与快速路共建桥梁结构方案,推荐采用双层门式墩和铁路箱梁的共建结构;研究市域铁路与城市快速路共建3种典型车站,包括:路中2层高架站、路中3层高架站(标准站)、路中3层高架站(越行站);分析车站结构框架横梁与桥道梁的结合方式特点,推荐采用铁路承轨梁与横向框架梁刚接、公路梁支座与盖梁连接的方案。

With the development of urban,land supply is under grave stress.The co-construction of suburban railway and expressways can save land,reduce demolition cost and meet the urban landscaping requirements.This paper analyzes the shared bridge structural scheme for suburban railway section and expressway in aspects of structural design,construction convenience and engineering investment and recommends the co-construction structure of double-deck portal piers and railway box beams.It studies three typical co-construction stations of suburban railway and urban expressways,including:double-deck elevated station in the middle of the road,triple-deck elevated station in the middle of the road(standard station)and triple-deck elevated station in the middle of the road(overtaking station).In addition,it analyzes the characteristics of combination modes of frame transverse beam and bridge track beam of the station structure,and recommends the scheme of rigid connection between railway track bearing beam and transverse frame beam as well as connection between road beam support and bent cap.