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Shear properties of thawed natural permafrost by bender elements
Received:March 05, 2017  Revised:April 05, 2017  Click here to download the full text
Citation of this paper:Feng Zhang,ZhaoHui(Joey) Yang,JiaHui Wang,HaiPeng Li,Benjamin Still,2017.Shear properties of thawed natural permafrost by bender elements.Sciences in Cold and Arid Regions,9(4):343~351.
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Author NameAffiliationE-mail
Feng Zhang School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;College of Engineering, University of Alaska Anchorage, Anchorage, Alaska 99508, USA zhangf@hit.edu.cn 
ZhaoHui(Joey) Yang College of Engineering, University of Alaska Anchorage, Anchorage, Alaska 99508, USA  
JiaHui Wang College of Engineering, University of Alaska Anchorage, Anchorage, Alaska 99508, USA;School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China  
HaiPeng Li College of Engineering, University of Alaska Anchorage, Anchorage, Alaska 99508, USA;State Key Laboratory of Geo-mechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 21116, China  
Benjamin Still College of Engineering, University of Alaska Anchorage, Anchorage, Alaska 99508, USA  
 
Abstract:Thawed permafrost could cause a serious stability problem for foundations and oil-wells in cold regions. A non-damage testing procedure, employing the Bender Element Method, was used for permafrost samples collected from a continuous frozen core obtained from the North Slope of Alaska, USA. The wave velocity and modulus of thawed permafrost were investigated on various isotropic confining pressure from 0 kPa to 400 kPa per 100 kPa. The received shear wave propagation was recorded, and the elastic wave theory was used to calculate shear modulus. Finally, the shear modulus affected by confining pressure, water content and dry density were analyzed and discussed, and a regression formulation of shear modulus based on the Janbu Model for thawed silty and sandy permafrost were proposed and validation.
keywords:shear velocity  shear modulus  thawed natural permafrost  bender element
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