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TitleGeophysical imaging of permafrost conditions along the northern Yukon Alaska Highway
AuthorOldenborger, G A; LeBlanc, A -M; Stevens, C W; Chartrand, J; Loranger, B
SourceProceedings of GeoQuebec 2015, 68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference; 2015 p. 1-8
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20150060
MeetingGeoQuebec 2015, 68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference; Quebec; CA; September 20-23, 2015
Documentbook
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceYukon
NTS115F; 115G; 115J; 115K
AreaBurwash Landing; Yukon Alaska Highway
Lat/Long WENS-141.0000 -138.2344 62.6356 60.9017
Subjectsgeophysics; surficial geology/geomorphology; permafrost; ground ice; geophysical interpretations; geophysical surveys; resistivity surveys; ground probing radar; frost heaving; groundwater; analytical methods; Cenozoic; Quaternary
Illustrationslocation maps; photographs; histograms
ProgramLand-based Infrastructure, Climate Change Geoscience
LinksOnline - En ligne
AbstractThree sections of the northern Yukon Alaska Highway (23 km) have been identified for testing the usefulness of geophysical surveys for understanding permafrost degradation and assisting with highway management. Results from capacitive resistivity and ground-penetrating radar surveys are analysed and interpreted along with surficial maps, geotechnical borehole records, and surface observations of highway roughness and distress. Observed damage appears to be associated with a variety of ground ice conditions. The geophysical results help elucidate the terrain conditions and support the conclusion that multiple subsurface processes contribute to highway degradation. Several geophysical signatures are interpreted as indicative of terrain conditions involving ice-rich ground, frozen ground, thaw-susceptible sediments and shallow groundwater.
Summary(Plain Language Summary, not published)
The Yukon Alaska Highway is a vital transportation route connecting the Yukon to southern Canada and Alaska. The construction and maintenance of transportation infrastructure in permafrost regions presents challenges and costs that do not exist in other areas. Three sections of the northern Yukon Alaska Highway have been identified for testing the usefulness of geophysical surveys for understanding permafrost degradation and assisting with highway management. Geophysical survey results are analysed in conjunction with surficial maps, records from geotechnical borehole investigations, and surface observations of highway distress such as roughness, longitudinal cracking, embankment failures and differential settlements. Observed damage appears to be associated with a variety of ground ice conditions. The geophysical results help elucidate the terrain conditions and support the conclusion that multiple subsurface processes contribute to highway degradation involving ice-rich ground, frozen ground, groundwater and lithology.
GEOSCAN ID296497