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For several years now, climate change has had a major influence on the degradation of permafrost, which has a direct impact on infrastructure stability. To reduce the impact on transport infrastructure, several protection techniques have been developed. These different techniques are based on reducing heat induction under the infrastructure and increasing heat extraction from the embankment.
The main objective of this project is to conduct long-term monitoring of the thermal behaviour of the ground of transportation infrastructure in Nunavik, which has been adapted to limit the thawing of permafrost. On the road to Salluit Airport, the permafrost mitigation methods under study are: a thermal drain and softening of the slope of the backfill. At the Puvirnituq runway, the project is studying an air-convection embankment, built in 2009.
By monitoring the long-term thermal behaviour of the ground, it can be determined whether the implementation of these methods has been sufficient to mitigate the thawing of permafrost.
Translated with www.DeepL.com/Translator