甬舟铁路富翅门公铁两用跨海大桥桥塔设计  

Pylon Design for Fuchimen Rail-cum-Road Sea-Crossing Bridge on Ningbo-Zhoushan Railway

作　　者：崔苗苗[1,2,3] 刘振标 王鹏宇[1,2,3] CUI Miao-miao;LIU Zhen-biao;WANG Peng-yu(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;China Railway Construction Bridge Design and Research Branch,Wuhan 430063,China;China Railway Construction Laboratory of Bridge Engineering,Wuhan 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 [2]中铁建大桥设计研究院,湖北武汉430063 [3]中国铁建股份有限公司桥梁工程实验室,湖北武汉430063

出　　处：《世界桥梁》2020年第S01期40-46,共7页World Bridges

基　　金：中国铁建股份有限公司科技研究计划课题(2018-B16);中铁第四勘察设计院集团有限公司科技研发项目(2017K006,2018K005,2018K011,2020K001)。

摘　　要：甬舟铁路富翅门公铁两用跨海大桥采用高低塔公铁平层桥塔中穿挑臂式钢箱梁斜拉桥,跨度布置为(66+160+388+112+60)m。根据该桥的结构特点,选取梭形桥塔和H形桥塔方案,从结构受力、工程造价、景观效果及施工便利性等方面进行比选,最终采用主梁横向刚度较大、景观性好的梭形桥塔方案。梭形桥塔采用C50钢筋混凝土结构,小里程侧、大里程侧桥塔高度分别为153m、135m。索塔锚固采用顺桥塔外壁分离式斜置钢锚箱,钢锚箱节段沿水平方向划分。对桥塔进行整体静力、局部应力、稳定性及抗震计算分析,结果表明桥塔强度、刚度、稳定性及抗震性能均满足规范要求。The Fuchimen Rail-cum-Road Bridge on Ningbo-Zhoushan Railway is a cable-stayed bridge featuring its deck that accommodates both railway and highway and two pylons with different heights.The superstructure,arranged in five spans of 66,160,388,112 and 60 m,consists of steel box girders with outriggers.To match with the structural characteristics of the bridge,the shuttle-shaped and H-shaped pylons were considered and compared from aspects of load bearing behavior,costs,landscaping effect and ease-of-construction,and the shuttle-shaped option was finally chosen for its greater transverse stiffness and more striking landscaping effect.The pylons are reinforced concrete structures cast by C50 concrete,measuring 153 m and 135 m high.The cables are anchored to the pylon walls via separately-distributed inclined steel anchor boxes,and the steel anchor boxes are divided into sections along the horizontal direction.The analysis of the integral static force,local stress,stability and seismic performance of the pylons demonstrated that the strength,stiffness,stability and seismic performance of the pylons could meet the code requirements.

关 键 词：斜拉桥 公路铁路两用桥 跨海大桥 桥塔 选型 钢锚箱 计算分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U443.38[交通运输工程—道路与铁道工程]