200 km/h客货共线铁路主跨216 m连续刚构桥总体设计及技术创新  

Overall Design and Technical Innovation for Main Span 216 m Continuous Rigid-frame Bridge on Nanping-Sanming-Longyan Railway of Mixed Passenger and Freight Traffic

作　　者：张朝霞[1] ZHANG Zhao-xia(China Railway Siyuan Survey and Design Group Co., L td .,Wuhan 430063, Chin)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道标准设计》2018年第3期58-61,共4页Railway Standard Design

基　　金：中铁第四勘察设计院集团有限公司科技研究开发课题(2013K07)

摘　　要：南三龙铁路合福联络线闽江特大桥主桥为(118+216+118)m预应力混凝土连续刚构,为国内已建和在建项目中主跨最大的高等级铁路连续刚构桥。随着预应力混凝土刚构跨度增大,桥梁的刚度以及混凝土的后期徐变控制成为设计难点。从方案比选到主梁设计,介绍本桥的设计思路以及体外索的设置等关键技术,并研究3种车型通过桥梁时车桥耦合动力效应。结果表明:本桥各项指标均满足规范要求,并留有适当的安全储备,具有良好的动力特性,列车通过桥梁时安全性和乘坐舒适性均满足要求。The main bridge of Min Jiang River Super Large Bridge on Nanping-Sanming-Longyan Railway is a prestressed concrete rigid-frame bridge with span arrangement（118＋216＋118） m and has the largest main span of continuous rigid-frame bridge on high-grade railway in our country.Designing the prestressed concrete rigid-frame bridge with a larger span tends to be very difficult to hold rigidity of the bridge and control the post creep of concrete.The overall design of the bridge and some key technologies such as setting up external cable are introduced in terms of scheme comparison and main beam design,and studies are conducted on the vehicle/bridge coupling dynamic responses when three types of vehicles pass through the bridge.The results show that the rigidity and strength of the bridge meet the relevant requirements specified in the codes and the bridge has good dynamic performances for safe and comfort train operation.

关 键 词：铁路桥 预应力混凝土 连续刚构 徐变挠度 动力响应 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]