摘要
新建焦洛平铁路洛阳黄河公铁大桥,大桥上层通行6车道一级公路,设计时速80 km,下层通行2线高速铁路,铁路设计时速350 km,采用无砟轨道,全桥长2.06 km。综合考虑黄河河道管理相关技术要求、文物保护控制及整个地区路网规划、城市发展规划等,桥位选择在G208黄河公路大桥上游180 m,与G208改建共同实施跨越黄河;综合考虑黄河主河槽及深泓段防洪要求、为避开国家级文物邙山古墓群导致部分缓和曲线进入主桥、轨温伸缩调节器技术要求、公路面行车舒适性、结构受力及工程造价等因素,主桥采用1-(8×108)m+1-(128+4×180+128)m+2-108 m四联布置钢桁组合梁桥,满足各项要求同时做到了方案经济科学合理。
The Luoyang Yellow River Road-Rail Bridge is part of the newly constructed Jiaozuo-Luoyang-Pingdingshan Railway.The upper layer is a six-lane first-class highway designed for 80 km/h,and the lower layer is a double-track highspeed railway designed for 350 km/h with ballastless tracks.The bridge spans 2.06 km in total.Comprehensive consideration was given to relative technical requirements for Yellow River channel management,cultural relic protection controls,regional road network planning,urban development plans,etc.The bridge location was selected 180 meters upstream of the G208 Yellow River Highway Bridge,and constructed jointly with the reconstruction of G208 to cross the Yellow River.Key factors considered included flood control requirements for the Yellow River′s main channel and deep trough section,the need to avoid the Mangshan Ancient Tombs Cluster(a national-level cultural heritage site),which required part of the transition curve to enter the main bridge,technical requirements for rail temperature expansion joints,highway driving comfort,structural stress,and project cost.The main bridge adopts a steel truss composite girder with a four-span continuous layout:1-(8×108)m+1-(128+4×180+128)m+2-108m.This solution achieves an optimal balance among technical performance,economic efficiency,and scientific rationality while meeting all specified requirements.
作者
方绪镯
FANG Xuzhuo(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan Hubei 430063,China)
出处
《铁道建筑技术》
2025年第9期30-33,70,共5页
Railway Construction Technology
基金
中铁第四勘察设计院集团有限公司科技研究开发项目(KY2024004S,KY2023014S)。
关键词
黄河公铁大桥
高速铁路桥
钢桁组合梁
G208改建
主河槽深泓段
缓和曲线
轨温伸缩调节器
Yellow River Rail-Road Bridge
high-speed railway bridge
steel-truss composite girder
reconstruction of G208
deep trough section of the main river channel
transition curve
rail temperature expansion joint
