兰新铁路季节性冻土区路基冻害成因分析

Analysis on Genesis of Frost Damage to Lanzhou-Xinjiang Railway Subgrade in Seasonal Permafrost Region

以兰新铁路为背景,重点对兰新铁路冻害进行研究。以兰新铁路冻害对线路运营影响为出发点,论述兰新铁路冻害现状及特点;采用现场调查、试验等方法,对兰新铁路典型冻害段冻害现象进行分析,将冻害类型进行分类;并以道床及路基基床为重点,从土质、水分和温度方面分析兰新铁路路基冻害的成因及冻害机理,为冻害整治提供依据。

The paper took Lanzhou-Xinjiang Railway as a background and the study focuses on the frost damage there. First of all, the influence on the line operation was mentioned, discussing the status quo and the characteristics of the damage;next, by means of on-site investigation and testing, the phenomenon in thetypical frost damage zone along the Railway was analyzed with the damages being classified; simuhaneously, taking the track bed and the subgrade bed as the objectives, the damages were studied from the aspect of soil, water and temperature; last, the genesis and mechanism of the frost damage to the Lanzhou-Xinjiang Railwaysubgrade was generalized, offering the basis of the treatment.