研究目的：自青藏铁路开通运营以来,在多年冻土区已经出现了几处冻土斜坡路堤变形较大的情况。本文针对青藏铁路多年冻土区斜坡路堤的稳定性进行了研究,希望能够为青藏铁路多年冻土区斜坡路堤的维护提供帮助。
研究结论：青藏铁路的修筑改变了沿线多年冻土的生存条件和路基周围的水热环境,同时气温的年际变化和多年变化也影响着路基的工程状态。论文从青藏铁路多年冻土区斜坡路堤稳定的主要影响因素(如:水、地温、冻土类型、坡向和坡度)着手进行了分析,得出各影响因素对路基的不利影响。
Research purposes:Since the Qinghai—Tibet Railway was open to traffic，the big embankment distortions have appeared on some slope in permafrost regions．This paper researches the stability of the embankment on slope in permafrost regions along Qinghai—Tibet Railway for offering the reference to the maintenance of the embankment on slope in permafrost regions along Qinghai—Tibet Railway．
Research conclusions: Construction of the Qinghai—Tibet Railway changed the original condition of the frozen soil permafrost along the railway and water—heat environment around the embankment of railway．At the same time，the annual fluctuation and perennial fluctuation of the air temperature influence the engineering status of the embankment． This paper analyzes the main influence factors on the stability of the embankment on slope in permafrost regions Mong Qinghai—Tibet railway，such as water，ground temperature，frozen ground type and direction and degree of the slope，and gives the negative influence of these factors on the roadbed．
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