高速铁路大跨度四线钢桁斜拉桥桥塔设计  

Design of Pylons of Long-span Steel Truss Cable-stayed Bridge on Four-line High-speed Railway

作　　者：谢远超 XIE Yuanchao(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《铁道标准设计》2021年第2期67-72,共6页Railway Standard Design

基　　金：中国铁路设计集团有限公司科技开发计划课题(2019YY220601,2019YY220606)。

摘　　要：椒江特大桥主桥为(84+156+480+156+84)m四线钢桁斜拉桥,半漂浮体系。桥塔为花瓶形混凝土塔,由塔座、下塔柱、中塔柱、上塔柱、下横梁、上横梁六部分组成,塔高为190 m,塔内设检修平台、爬梯及电梯等相关附属。为确保桥塔设计合理,通过对桥塔塔形、塔高进行研究分析,确定合理的桥塔参数,并进一步细化桥塔截面设计,确定索塔锚固体系,对施工方案和耐久性措施进行研究。通过对桥塔各项指标进行检算,对桥塔抗震性能进行分析,结果表明桥塔各项性能均满足规范要求。The main bridge of Jiaojiang River Bridge is designed as a steel truss cable-stayed bridge carrying four-line high-speed railway.The bridge is of a half-floating system,having span arrangement(84+156+480+156+84)m.The pylons,rising 190 m,are vase shaped reinforced concrete structures,which are made up of base,lower column,middle column,upper column,lower cross beam and upper cross beam.Ancillary facilities as overhaul platform,ladder and elevator are arranged inside the pylon.In order to ensure reasonable design of the pylons,comparison and analysis are conducted of the pylon shape and pylon height to determine reasonable parameters of the pylons,the section design of the pylons is further refined,the stay cable anchorage system in the pylons is determined,the construction scheme and durability measures are studied.All indexes of the pylons are checked and calculated,and the seismic performance of the pylons is analyzed.The results of calculation and analysis indicate that all performances of the pylons meet the relevant requirements of the code.

关 键 词：高速铁路 四线铁路 铁路桥 斜拉桥 桥塔 塔形 结构设计 索塔锚固 设计 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]