高速铁路路基基床结构可靠性研究  

Study on the Reliability of the Subgrade Bed Structure of the High-speed Railway

作　　者：于红利 王纪朗 YU Hongli;WANG Jilang(CCCC Second Highway Engineering Bureau Co.,Ltd.,Xi'an 710065,China)

机构地区：[1]中交第二公路工程局有限公司,西安710065

出　　处：《路基工程》2023年第3期34-38,共5页Subgrade Engineering

摘　　要：铁路路基基床是承受轨道结构和列车荷载的基础,当列车运行速度提高至400+km/h时,增大了基床动应力、动变形、动应变的不确定性。基于《铁路路基设计规范(极限状态法)》(Q/CR 9127—2018),分别建立了基床动应力、动变形、动应变的功能函数;其次基于可靠度的方法,研究400+km/h高速铁路路基的基床参数的合理性。结果表明:基床K_(30)及动轴重指标对控制基床动变形更为敏感。The subgrade bed of railway is the foundation to bear the load of track structure and train.When the train operation speed increased to 400+km/h,the uncertainty of dynamic stress,dynamic deformation and dynamic strain of the subgrade bed increases.based on Code for Design on Railway Earthworks(Limit State Method)(Q/CR 9127—2018),the functional functions of dynamic stress,dynamic deformation and dynamic strain of subgrade bed were established respectively.Secondly,based on the reliability method,the rationality of the subgrade parameters of 400km/h+high-speed railway is studied.The results show that the index of K30 and dynamic axle load index are more sensitive to control the dynamic deformation of the subgrade bed of railway.

关 键 词：高速铁路 基床结构 极限状态设计 可靠指标 设计参数 

分 类 号：U238[交通运输工程—道路与铁道工程]