陡坡上站前综合性高架桥广场桥式方案研究  

Research on the Bridge-Type Scheme for a Comprehensive Elevated Plaza Bridge of Station Square at the Steep Slope

作　　者：刘华全[1] LIU Huaquan(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》2025年第4期122-125,129,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计划项目(2019K106)。

摘　　要：衢宁铁路屏南火车站地处闽东地区,站前广场位于最大坡度55°,且基岩埋深较浅的山坡上。如何在这种地形复杂,山高坡陡的大山中修建一座长455 m、最小宽度106 m、最大落差70 m的综合性站前广场,需研究选择一种合适的桥型方案,实现广场功能齐全、结构安全、施工方便,且经济的良好效果。研究结论:墩高山陡时,梁型首选预应力混凝土简支T梁,先简支后连续,预制架设方案;跨径主要采用40 m,辅以30 m、35 m跨用于局部调整;桥墩结合地形选择,墩矮陡坡区域采用桩柱式桥墩,地形较平坦且墩高区域采用矩形双立柱刚构墩与群桩结合;横向应采用梁缝数量少,整体性好的宽幅截面。The Pingnan Railway Station of Quzhou-Ningde Railway is located in the eastern Fujian,with the station square situated on a hillside with a maximum slope of 55 degrees and shallow bedrock burial depth.How to build a comprehensive station square with a length of 455 meters,a minimum width of 106 meters,and a maximum drop of 70 meters in this complex terrain and steep mountains?It is necessary to study and choose a suitable bridge type scheme to achieve the good effects of complete square functions,safe structure,convenient construction,and economy.Research conclusions:(1)When the pier is steep,prestressed concrete simply supported T-beam is preferred as the beam type,which is simply supported first and then continuous,and the erection scheme is prefabricated;(2)the span is mainly 40 m,supplemented by 30 m and 35 m spans for local adjustment;(3)the pier shall be selected in combination with the terrain.Pile-column piers shall be used in the low and steep slope area,and rectangular double-column rigid frame piers shall be used in the flat terrain and the pier high area;(4)wide cross-section with few beam joints and good integrity should be adopted in the transverse direction.

关 键 词：站前广场 高架桥 梁型 桥墩 跨径 群桩 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]