高速铁路稀柱、半整体式高架站桥梁结构设计研究  

Research on High-speed Railway Bridge Structure Design of Sparse-piers and Semi-integral Viaduct Station

作　　者：沈哲亮 SHEN Zheliang(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道标准设计》2024年第8期86-91,共6页Railway Standard Design

基　　金：中铁第四勘察设计院集团有限公司科技研发项目(2021K014)。

摘　　要：伴随着高速铁路建设进入新时期,铁路高架站出现的频率急剧增加。当桥墩较高时,高架站桥下空间有较大的利用需求,由于受刚度控制,常规桥墩布置较为密集,容易形成“桥墩森林”现象,不利于空间利用,且美观性较差。为寻求适用于高墩高架站的合理结构体系,以合新铁路定远高架站为工程背景,在设计中研究了常用结构体系存在的问题,提出一种稀柱、半整体式高架站桥梁结构体系。该体系采用带悬臂的双斜柱预应力横梁门式墩,极大减少了桥墩数量和体积,并保持良好的力学性能。提出一种可释放水平力的固定支座,通过改变结构约束体系提高了结构整体刚度。与常用结构体系相比,可大幅提高桥下空间利用效率,减小结构尺寸,减少结构墩顶位移,具备良好的美观性、实用性及结构受力性能。为今后高速铁路及其他轨道桥梁高架站的桥梁结构设计提供了新思路。With the construction of high-speed railway entering a new period,the frequency of railway viaduct stations has increased dramatically.When the pier is high,the space under the viaduct station has a large demand for utilization.Due to the rigidity control,the conventional pier layout is relatively dense,it is likely to form the phenomenon of“pier forest”,which is not conducive to space utilization and has poor aesthetics.In order to find a reasonable structural system suitable for high pier viaduct station,this paper takes Dingyuan viaduct station of Hefei-Xinyi High-speed Railway as the engineering background,the existing problems of common structural systems are studied in the design,and a bridge structural system of sparse-piers and semi-integral viaduct station is proposed.This structural system adopts prestressed beam portal pier with cantilever with two inclined columns,which greatly reduces the number and volume of piers,and maintains good mechanical properties.A kind of fixed support which can release horizontal force is innovatively proposed,which improves the overall stiffness of the structure by changing the structural restraint system.Compared with common structural systems,it can greatly improve the utilization efficiency of the space under the bridge,greatly reduce the structure size and top displacement of piers,and has good aesthetics,practicality and structural mechanical performance.It provides a new idea for the bridge structure design of high-speed railway and other rail bridge viaduct stations.

关 键 词：高速铁路 高架站 桥梁结构 稀柱 半整体式 结构设计 

分 类 号：U238[交通运输工程—道路与铁道工程] U448.13[建筑科学—桥梁与隧道工程]