不同基础条件下预制板式无砟轨道结构设计与检算
STRUCTURAL DESIGN AND CALCULATION OF PRECAST SLAB BALLASTLESS TRACK UNDER DIFFERENT FOUNDATION CONDITIONS
付琪璋 1安震 2万廷聪3
作者信息
- 1. 中铁第一勘察设计院集团有限公司,西安 710043
- 2. 中国铁路沈阳局集团有限公司工务部,沈阳 110001
- 3. 鲁南高速铁路有限公司,济南 250000
- 折叠
摘要
基于城市轨道交通工程建设需求,在非预应力轨道板结构设计基础上,采用有限元软件建立了不同基础条件下的无砟轨道结构耦合模型,结合极限状态法,研究开展了综合考虑列车荷载、温度梯度和基础变形作用下预制板的弯矩及配筋计算.结果表明:合理的非预应力板式无砟轨道结构设计,能够满足工程建设需求,路基段承载能力极限状态配筋设计受偶然组合作用控制,不同基础类型的轨道板纵横向配筋均受正常使用极限状态标准组合控制.
Abstract
Based on the construction requirements of urban rail transit engineering,a coupled model of bal-lastless track structure under different foundation conditions was established using finite element software on the basis of non prestressed track slab structure design.Combined with the limit state method,the bending moment and reinforcement calculation of prefabricated slabs under comprehensive consideration of train load,temperature gra-dient,and foundation deformation were studied.The results show that a reasonable design of non prestressed slab ballastless track structure can meet the needs of engineering construction.The reinforcement design of the ultimate bearing capacity of the roadbed section is controlled by accidental combination effects,and the longitudinal and transverse reinforcement of track slabs of different foundation types are controlled by the standard combination of normal use ultimate state.
关键词
地铁/结构设计检算/板式无砟轨道/极限状态法Key words
subway/structural design and checking/slab ballastless track/limit state method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据