哈大高速铁路路基冻胀规律及影响因素分析

摘要

根据哈大高速铁路路基冻胀的测量和普查结果,进行系统分析和对比,提出严寒地区无砟轨道路基冻胀的特点和基本规律,分析路基冻胀的水分、温度及细颗粒含量等影响因素,从结构设计角度提出预防和减弱冻胀的设计优化建议,对严寒地区无砟轨道路基冻胀处理及结构优化设计具有重要的指导意义.%After systematic analysis and comparison based on survey and statistic results of frost heave in the subgrade on Haerbin-Dalian High-speed Railway,this paper put forward the characteristics and basic laws of frost heave in subgrade of ballastless track in severe cold region.And by analyzing the influence factors of frost heave in subgrade such as water,temperature and particle content,this paper put forward the design optimization scheme about frost heave prevention and reduction from the perspective of structure design.It is of important guiding significance for the frost heave treatment and design optimization of subgrade structure of ballastless track in severe cold regions.