高纬度岛状多年冻土区公路路基施工技术分析

Technical Analysis of Highway Subgrade Construction in Island Permafrost Region of High latitude

结合国道332线阿里河至库布春林场段一级公路工程设计与施工,根据大兴安岭地区高纬度岛状多年冻土区气象特点、水文情况、不同地质条件下多年冻土物理力学性质,对高纬度岛状多年冻土区路基设计与施工方法及相应的技术措施进行总结,保证了路基安全顺利施工,降低了路基施工后由于多年冻土退化而引起路基冻胀、融沉等病害,使多年冻土环境得到了有效保护。

This paper takes the design and construction of Ali river to Kubuchun forest farm section of national highway332 which is the first class highway as an example.According to the meteorological characteristics,hydrologic conditions,physical and mechanical properties under different geological conditions of high latitude permafrost region in Daxinganling,the subgrade construction and corresponding technical measures are summarized to ensure the subgrade are constructed safely.The highway diseases caused by permafrost degradation such as subgrade frost heave,thawing settlement and other diseases are reduced after the work.The permafrost environment are effectively protected.