基于美标体系的冻土区铁路路基设计研究

Study on Railway Subgrade Design in the Frozen Region Based on American Standard System

结合加拿大某铁路项目,对季节性冻土区铁路路基工程的设计方法进行了研究。研究以美标体系下的相关铁路路基设计标准为主,同时结合中国铁路设计经验及相关标准来开展。研究范围包括:路基设计荷载、路基面形状、底碴层设计、路堤设计、路堑设计以及季节性冻土区的特殊设计等内容。通过研究发现,美标体系的铁路路基设计标准涵盖面广,但各方面深入较浅,以提供方法和建议为主。建议今后在美标体系下进行铁路路基设计时,应以采用美标中所提供的方法为主,同时结合必要的中国标准进行辅助,两者取长补短,以达到最优的设计效果。

Based on the railway project in Canada,the article carried out study on design methodology of railway subgrade in the seasonally frozen region.The study was mainly based on the subgrade design standards of American railway,at the same time,integrated some railway design experience and standards from China.The study included:design load for subgrade,formation surface,sub-ballast layer,embankment,cutting and special design for seasonally frozen region.According to the study,the subgrade design standards of American railway are comprehensive,but not more detailed.These standards just provide some methods and suggestions for engineers.The author suggests that when designing the railway subgrade based on the American standard system in the future,we should combine the methodology of American and the necessary method from China standard.The two standard systems should refer to each other to achieve the optimal design effect.