多年冻土地区公路路基设计难点分析

Analysis on Difficulties in Highway Subgrade Design in Permafrost Regions

冻土地区的土层性质对公路路基稳定性的影响至关重要,随着冻土地区公路建设项目的不断增加,冻土地区公路路基的设计工作面临更多挑战。为了探究多年冻土地区公路路基稳定性的影响因素和设计难点,文章从路基勘察设计的角度总结了此类地区公路路基设计的影响因素和存在的问题,并给出了不同月份路基的稳定系数及路基设计的针对性提升改善措施。结果表明,6月—10月冻土地区的路基稳定系数为2.0左右,其他月份路基稳定系数较高;通过铺设基地保温层和优化路基填筑施工及强化路面结构设计可以有效解决多年冻土地区公路路基设计面临的问题。

The influence of soil properties in permafrost regions on the stability of highway subgrade is very important.With the increasing number of highway construction projects in permafrost regions,the design of highway subgrade in permafrost regions faces more challenges.In order to explore the influencing factors and design difficulties of highway subgrade stability in permafrost regions,this paper summarizes the influencing factors and existing problems of highway subgrade design in such regions from the perspective of subgrade survey and design,and gives the subgrade stability coefficient in different months and the targeted improvement measures of subgrade design.The results show that the stability coefficient of subgrade in permafrost regions from June to October is about 2.0,and the stability coefficient of subgrade in other months is higher.By laying the base insulation layer,optimizing the subgrade filling construction,and strengthening the pavement structure design,the problems faced by the design of highway subgrade in permafrost regions can be effectively solved.