空间刚架铁路桥梁结构设计研究  

Research on the Structural Design of Space Rigid Frame Railway Bridges

作　　者：李伟超 赵会东 周维 施威 邓江涛 蒋霏 Li Weichao;Zhao Huidong;Zhou Wei;Shi Wei;Deng Jiangtao;Jiang Fei(Civil Engineering Design Research Institute,China Railway Design Group Co.,Ltd.,Tianjin 300308,China;Engineering Design Appraisal Center,China State Railway Group Co.,Ltd.,Beijing 100844,China)

机构地区：[1]中国铁路设计集团有限公司土建工程设计研究院,天津300308 [2]中国国家铁路集团有限公司工程设计鉴定中心,北京100844

出　　处：《铁道技术标准（中英文）》2024年第7期57-62,共6页Railway Technical Standard(Chinese & English)

基　　金：中国国家铁路集团有限公司重大课题(K2018G016);中国铁路设计集团有限公司科技开发课题(721826)。

摘　　要：空间刚架结构作为一种新型的铁路桥梁结构形式,其受力性能缺少针对性研究。通过计算分析其变形指标、受力特性及工程造价等内容,对空间刚架铁路桥梁的结构形式、主要构件尺寸进行比选研究,确定主要结构构造:空间刚架单元纵向总长100 m左右,纵、横向典型跨度分别为20.0、13.0 m,桥面采用纵横梁结构体系。动力仿真分析结果表明,结构各项计算指标均满足要求,但在高速铁路中推广应用值得进一步研究。推荐采用桩底注浆法和“跳仓法”以减小基础差异沉及收缩徐变等不利因素对结构的影响。The space rigid frame structure,as a new type of railway bridge structure,lacks targeted research on the their mechanical performance.Through the calculation and analysis of its deformation index,mechanical characteristics and engineering cost,the structural form and main component size of the spatial rigid frame railway bridge are compared and studied,and the main structural construction is determined:The total longitudinal length of the space rigid frame unit is about 100 m,and the typical longitudinal and transverse spans are 20.0 m and 13.0 m respectively;The bridge deck adopts the longitudinal and transverse beam structural system。The results of dynamic simulation analysis show that all calculation indexes of the bridge meet the requirements,but the application of the bridge in high-speed railway worth further study.It is recommended to use the pile bottom grouting method and the“jumping position method”to reduce the influence of unfavorable factors such as foundation differential settlement and shrinkage creep on the structure.

关 键 词：铁路桥梁 双层车场 空间刚架 结构设计 

分 类 号：T442[一般工业技术]