摘要
巴河特大桥是黄冈至黄梅铁路的控制性工程,其主桥采用(44.5+108+200+200+108+44.5)m的三塔部分斜拉桥,是国内首座高速铁路三塔部分斜拉桥。本文通过空间有限元软件,对三塔部分斜拉桥的合理结构受力体系进行静、动力性能分析。同时,创新性地提出移动造桥机建设方案,使主梁标准节段长度达8 m。研究结果表明:(1)采用刚构-连续梁三塔部分斜拉桥结构体系,结构受力合理且无砟轨道同桥梁具有良好适应性;(2)首次采用悬臂浇筑造桥机技术,最大悬臂浇筑节段长度达8 m,节省工期4个月;(3)采用两边主塔设置纵向阻尼器,使3个墩塔协同受力,大桥具有良好的抗震性能;(4)该桥具有良好的静、动力特性,行车舒适性及安全性均满足设计要求。该桥的成功实施推动了大跨度无砟轨道混凝土桥梁的发展,可为今后大跨度铁路桥梁的设计提供借鉴和思路。
Bahe Super Major Bridge is a control project of Huanggang-Huangmei Railway.Its main bridge adopts(44.5+108+200+200+108+44.5)m three-tower partial cable-stayed bridge,marking China’s first three-tower partial cable-stayed bridge for high-speed railways.This paper employed spatial finite element software to analyze the static and dynamic performance of the rational structural load-bearing system of the three-pylon partial cable-stayed bridge,and proposed an innovative mobile bridge construction machine solution,enabling the standard segment length of the main girder to reach 8 m.The research results demonstrate:(1)The rigid frame-continuous beam three-tower partial cable-stayed bridge structural system exhibits rational structural load-bearing behavior,with the ballastless track showing excellent compatibility with the bridge.(2)The cantilever casting bridge construction machine technology is applied for the first time,achieving a maximum cantilever-cast segment length of 8 m and reducing the construction period by 4 months.(3)Longitudinal dampers installed on both sides of the main tower ensure coordinated load-bearing among the three piers and towers,enabling the bridge superior seismic performance.(4)The bridge demonstrates favorable static and dynamic characteristics,with ride comfort and safety meeting design requirements.The successful implementation of this bridge advances the development of long-span ballastless track concrete bridges and provides valuable references and insights for designs of long-span railway bridges.
作者
王存国
钱光
张超超
王新国
WANG Cunguo;QIAN Guang;ZHANG Chaochao;WANG Xinguo(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)
出处
《高速铁路技术》
2025年第4期119-126,共8页
High Speed Railway Technology
基金
中铁第四勘察设计院集团有限公司科技研发计划(2022K085,2022K110)。
关键词
三塔部分斜拉桥
高速铁路
结构受力体系
悬臂浇筑造桥机
抗震性能
three-tower partial cable-stayed bridge
high-speed railway
structural stress system
cantilever casting bridge building machine
seismic performance
