HIGH-RESOLUTION MONITORING OF THAW SUBSIDENCE AFFECTING THE ACCESS ROAD TO UMIUJAQ AIRPORT IN NUNAVIK (QUEBEC)
Richard Fortier, Shuai Guo, Pierrick Lamontagne-Hallé, Wenbing Yu
Dans les comptes rendus d’articles de la conférence: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost ConferenceSession: Infrastructure Performance in Cold Regions II / Performance des infrastructures en régions nordiques II
ABSTRACT: The thaw subsidence along a 300 m long segment of the access road to Umiujaq Airport in Nunavik (Quebec) has been annually monitored since 2006. This subsidence is due to thaw consolidation taking place in a layer of ice-rich silt underneath the road embankment. The increase in air temperature over the last two decades and the thermal insulation of snow cover on the embankment shoulders and toes explain the permafrost degradation. Thaw subsidence as much as 1.50 m has been recorded since the road completion in 1991. Rates of thaw subsidence from 0.056 to 0.138 m/year were observed. According to numerical modeling, the thawing rate is 0.317 m/year. The coefficient of consolidation varies between 1.37 and 2.44 m2/year for corresponding thaw consolidation ratio from 1.021 to 0.765. The thaw consolidation of the silt layer is almost completed and only little thaw subsidence is expected along the monitored road.
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Fortier, Richard, Guo, Shuai, Lamontagne-Hallé, Pierrick, Yu, Wenbing (2015) HIGH-RESOLUTION MONITORING OF THAW SUBSIDENCE AFFECTING THE ACCESS ROAD TO UMIUJAQ AIRPORT IN NUNAVIK (QUEBEC) in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Fortier_GEO2015_532,
author = {{Fortier, Richard}, {Guo, Shuai}, {Lamontagne-Hallé, Pierrick}, {Yu, Wenbing}}
title = {HIGH-RESOLUTION MONITORING OF THAW SUBSIDENCE AFFECTING THE ACCESS ROAD TO UMIUJAQ AIRPORT IN NUNAVIK (QUEBEC)}
booktitle = {Proceedings of the 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference}
year = {2015}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {HIGH-RESOLUTION MONITORING OF THAW SUBSIDENCE AFFECTING THE ACCESS ROAD TO UMIUJAQ AIRPORT IN NUNAVIK (QUEBEC)}
booktitle = {Proceedings of the 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference}
year = {2015}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }