Development of a new ground cooling approach for road design in warming permafrost

永久冻土层占加拿大陆地的一半，是加拿大的重要组成部分。道路和其他交通基础设施在加拿大永久冻土区具有重要的经济、社会和政治意义。加拿大北部许多社区的道路基础系统的稳定性依赖于底层永久冻土的强度。然而，在过去几十年中，由于气候变暖，存在大量的永久冻土变暖和退化（融化）的证据。这种退化严重影响了加拿大北部修建的许多道路的性能，增加了它们的维修费用，缩短了它们的使用寿命，并危及北部的人口安全和经济活动。永久冻土退化的脆弱性增加了政府机构的关注

Permafrost underlies about half of Canada's landmass and is a critical component of Canada. Roads and other transportation infrastructure are of vital economic, social, and political importance in Canadian permafrost regions. The stability of road foundation systems in many Canadian northern communities relies on the strength of the underlying permafrost. However, extensive evidence exists of permafrost warming and degradation (thawing) over the past decades because of the climatic warming. This degradation has been severely affecting the performance of many roads constructed in northern Canada, increasing their maintenance costs, decreasing their useful life span, and jeopardizing the population safety and economic activities in the North. This vulnerability to permafrost degradation has increased the concern of governmental agencies