Warming permafrost
Effect of temperature increase on shear strength of frozen soil
The purpose of this research project is to investigate the impact of incremental temperature increase on the mechanical behaviour of frozen soil and to explore potential mitigation solutions. Considering the fact that extensive areas of permafrost in the cold regions in Canada already experience temperatures nearing 0掳C, even a small temperature rise of one or two degrees over a century would eventually have widespread effects. The controlled laboratory tests proposed in this research will examine (i) the effect of incremental temperature increase (from -4 to 0掳C) on strength characteristics of various frozen soils ranging from clay to gravel, and (ii) the effect of controlling parameters such as unfrozen water content, soil salinity and additives on the performance of these materials under simulated field conditions. The insight and knowledge gained through this research will lead to improved foundation and embankment designs that will provide long-term sustainable development.