摘要
高速铁路对路基冻胀变形控制提出了新的要求,传统意义上的不冻胀填料的微冻胀已经不能忽略,由此产生了一系列新问题。针对季节性冻土地区路基冻胀对高速铁路平顺性的影响,基于能量最低原理,推导了微冻胀填料的冻胀计算公式,提出了高速铁路微冻胀填料控制方法和建议。同时综合分析了基床表层级配碎石关键参数,提出了严寒地区高速铁路基床表层级配碎石级配优化建议。
New demands was proposed to control the subgrades frost heave deformation for high speed railways.Micro-heaving,meaning no frost heave in the traditional view,cannot be ignored.This paper is aimed at the impact on the ride comfort of high speed railways,caused by the subgrades frost heave in the seasonal frozen soil region.Based on the principle of minimum energy,the frost heave formula of the micro-heaving fillers was derived.Meanwhile,control methods and proposal to micro-heaving filling materials were proposed.In addition,the optimum suggestions of surface layer graded aggregatefor high speed railway in seasonal frozen soil region was put forward by analyzing the gradation key parameters.
出处
《铁道建筑》
北大核心
2016年第1期43-46,共4页
Railway Engineering
基金
中国铁路总公司科技研究开发计划课题(2014G003-A)
中国铁道科学研究院基金课题(2015YJ038)
关键词
微冻胀
填料骨架
分析模型
冻胀计算
Micro-heaving
Skeleton of filling material
Analysis model
Frost heave calculation
