Optimization in the use of Air Convection Embankments for Protection of Underlying Permafrost

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

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Since the beginning of the 1990s a significant increase in the mean annual air temperatures has been recorded all over the arctic regions. This has lead to a degrading of permafrost, which is now threatening the stability of airport and road embankments. To minimize the damages caused by thaw settlements, different mitigation techniques have been developed. This paper concerns optimization in the use of air convection embankments. In the autumn 2008 a test-site was established during the construction of a new road in Sisimiut, western Greenland. Two types of air convection embankments (ACE) were constructed on shorter sections of the road; a traditional ACE made of crushed rock and a modified ACE, where ventilation pipes were installed in the embankment shoulder. Thermistors were installed in each section to study the annual variations of the thermal regime in the embankments. The results from the first years of monitoring haven’t shown the expected effects from installing the ventilation pipes into the ACE. This is probably caused by the systems lack of potential to expel warm air. A higher amount of drainage holes in the ventilation pipes or a new approach instead of pipes will probably lead to the expected results, which has been achieved in earlier laboratory tests.
Original languageEnglish
Title of host publicationCold Regions Engineering 2012 : Sustainable Infrastructure Development in a Changing Cold Environment
EditorsBrian Morse, Guy Doré
Number of pages9
PublisherAmerican Society of Civil Engineers
Publication date2012
Pages12-20
ISBN (print)9780784412473
DOIs
StatePublished

Conference

ConferenceFifteenth International Specialty Conference on Cold Regions Engineering
Number15
CountryCanada
CityQuebec City
Period19/08/1222/08/12
Internet addresshttp://extranet.csce.ca/2012/iccre/
CitationsWeb of Science® Times Cited: No match on DOI

Keywords

  • Air convection embankment, Mitigation techniques, Permafrost degradation, Permafrost protection, Cooling effect, Heat removal
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