重庆朝天门长江大桥主桥设计与技术特点  

Design and Technical Characteristics of Main Bridge of Chaotianmen Changjiang River Bridge in Chongqing

作　　者：段雪炜[1] 徐伟[1] 

机构地区：[1]中铁大桥勘测设计院有限公司,湖北武汉430056

出　　处：《桥梁建设》2010年第2期37-40,共4页Bridge Construction

摘　　要：重庆朝天门长江大桥主桥采用(190+552+190)m中承式连续钢桁系杆拱桥结构,为双层桥面布置的公轨两用大桥。主桁拱肋为变高度N形桁式,中跨布置双层系杆。主桁构件选用3种不同材质,部分采用了变宽(高)度杆件。中间支承节点采用整体节点,其余均采用拼装式节点构造。上层系杆采用钢制杆件,下层系杆采用组合式系杆,吊杆采用高强度平行钢丝索。桥面系采用公路为正交异性钢桥面板、轻轨为纵横梁体系的组合式桥面结构。主梁边跨采用临时墩辅助的伸臂法架设,中跨采用扣索塔架辅助全伸臂安装,先拱后梁,在跨中合龙。The main bridge of Chaotianmen Changjiang River Bridge in Chongqing is a half-through continuous steel truss tied arch bridge structure with span arrangement(190+552+190) and is designed as a double-deck roadway-cum-light rail bridge.The arch ribs for the main trusses of the Bridge are the N-shape trusses with variable height and at the central span,the double-layer hangers are arranged.Three kinds of the different steel designations are selected for the main truss members and part of the members with varia...

关 键 词：拱桥 系杆拱 钢梁 结构设计 桥梁设计 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]