铁道科学与工程学报Issue(3)：475-481,7.
高速铁路有砟轨道路基设计荷载分析
Analysis of the design load on the high -speed railway ballsted track subgrade
摘要
Abstract
The influence scope,the amplitude of dynamic stress on subgrade surface and the attenuation law of a-long depth were discussed based on the existing distribution model of dynamic stress.Such conclusions are made as follows:A loading and unloading cycle of the dynamic stress on subgrade surface is accomplished by a single axle load under the geometric of ballasted track.The influence distances are 3.1 m and 3.0 m respectively when the dynamic stress distribution pattern is simplified to be triangle distribution along longitudinal lines,and uni-formed distribution in lateral.Given the dynamic effect and the dynamic stress inhomogeneous distribution in transverse of subgrade surface,a computational formula of subgrade surface dynamic stress had been deduced by the mechanics equilibrium condition.The depth attenuation law of dynamic stress has been calculated according to the distribution pattern and the correction of the dynamic stress inhomogeneous distribution in transverse.The computed results are in good agreement with the field measurement.关键词
高速铁路/有砟轨道/路基设计荷载/动应力Key words
high -speed railway/ballasted track/subgrade design load/dynamic stress分类
交通工程引用本文复制引用
刘钢,罗强,张良,蒋良潍..高速铁路有砟轨道路基设计荷载分析[J].铁道科学与工程学报,2015,(3):475-481,7.基金项目
国家重点基础研究发展规划（973计划）项目（2013CB036204）；国家自然科学基金资助项目（51408491）；西华大学重点基金资助项目 （）
