By Brian Morse, editor, Guy Dore
Lawsuits of the fifteenth overseas distinctiveness convention on chilly areas Engineering, held in Quebec urban, Canada, August 19-22, 2012. This assortment comprises eighty two peer-reviewed papers on new advancements in chilly areas engineering and applied sciences. those papers supply a really overseas view of the present kingdom of data in several features of civil engineering in chilly areas, together with geotechnics, transportation, pavements, constructions, rivers and ports, and water administration. themes comprise: embankment engineering on permafrost; beginning layout; frozen soil habit; infrastructure and weather switch; mining in chilly areas; navigation in seasonal frozen waterways; permafrost research; port engineering; river ice methods; roads: pavement layout, spring load regulations, and wintry weather highway upkeep; snow and ice; structural engineering; and wastewater administration in a chilly weather. This assortment may be of curiosity to all kinds of civil engineers operating in components the place chilly climate is an element in engineering perform.
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Boucher M. Ministère des transports du Québec, Rouyn-Noranda,, Canada ABSTRACT: The Tasiujaq airstrip in Kuujjuaq, Nunavik (Canada) is affected by permafrost degradation. As a result, the runway requires intensive maintenance in order to maintain a good service level. Three protection techniques, an air convection embankment, an embankment with an integrated heat drain and an embankment with gentle slope, have been tested in the shoulder of the Tasiujaq airfield. The purpose of this study is to assess the technical feasibility of installing those systems, to validate through testing in real operating conditions, their respective performance and to assess their cost benefit.
This problem has been corrected using thermal modelling in order to remove the effect of the water flow from the thermal behaviour of the test section. Figure 6: Temperature profiles in the four test section on June 15, 2010 (depth “0” is the interface between the embankment and natural soil) The trumpet curves were constructed for the four test sections using the average temperatures in March and in September for two monitoring seasons. Therefore, the figure illustrates roughly temperature envelope for the test sections during that period.
According to the current planning, the ventilation system will be improved and the test section will be monitored for a few additional years The gentle slope and the heat drain showed very promising performances. The two techniques cooled the embankment by approximately 4°C during winter and raised the permafrost level by about 3 m compared to the reference section during the monitoring period. Finally, both techniques are likely to be cost effective when used in severe settlement conditions. AKNOWLEDGEMENTS The authors gratefully acknowledge the Quebec Ministry of Transportation for their financial and technical support during this project.
Cold Regions Engineering 2012 by Brian Morse, editor, Guy Dore