珠肇高铁荷麻溪特大桥主桥设计方案对比研究  

Study of Design Schemes Comparison for Main Bridge of Hemaxi Grand Bridge on Zhuhai-Zhaoqing High-Speed Railway

作　　者：王斌[1] WANG Bin(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan Hubei 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《铁道建筑技术》2024年第10期90-94,共5页Railway Construction Technology

基　　金：中国铁建股份有限公司科技研究开发计划项目(2021-B17);中铁第四勘察设计院集团有限公司科技研究开发计划项目(KY2023090E)。

摘　　要：荷麻溪特大桥主桥为高速铁路大跨度无砟轨道桥梁,跨越航道,受机场航空限高影响,桥梁结构高度受到限制。结合桥址建设条件,对主跨290 m混合梁部分斜拉桥、钢箱-桁组合梁斜拉桥、混凝土板-钢桁组合梁斜拉桥三个方案,从结构受力、刚度及变形控制、动力性能、经济性、施工难度、运营期维养等方面进行综合分析对比。结果表明,三方案技术指标均满足规范要求,混凝土板-钢桁组合梁斜拉桥经济性优于钢箱-桁组合梁斜拉桥;混合梁部分斜拉桥刚度较大、经济性最优,被选择为推荐方案。The main bridge of Hemaxi Grand Bridge is a large-span ballastless track bridge of high-speed railway,crossing a navigation channel and is affected by airport clearance limit,which limits the structural height of the bridge.Considering the construction conditions at the bridge site,three design schemes were comprehensively analyzed and compared:a partial cable-stayed bridge with a main span of 290 m hybrid girder,a cable-stayed bridge with steel box-truss composite girder,and a cable-stayed bridge with concrete slab-steel truss composite girder.The analysis and comparison focused on structural stress,stiffness and deformation control,dynamic performance,economy,construction difficulty and maintenance during operation.The results show that the technical indicators of the three schemes can meet design codes,the cable-stayed bridge with concrete slab-steel truss composite girder is more cost-effective than the cable-stayed bridge with steel box-truss composite girder,while the partial cable-stayed bridge with hybrid girder has the greater stiffness and most cost-effectiveness,making it the recommended scheme.

关 键 词：混合梁部分斜拉桥 钢箱-桁组合梁 混凝土板-钢桁组合梁 方案对比 

分 类 号：U442.5+4[建筑科学—桥梁与隧道工程]