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The influence of heat extraction rate in freezing soils

From National Research Council Canada

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Subjectpermafrost; soils; heat transfer; fine grained soils; frozen soils; freezing; swelling; sol; transfert de chaleur; sol à grains fins; sol gelé; congélation (physique); fine-grained soils; one-dimensional frost heave experiments; Canadian silty soil; segregational heave rate; water flow; transient freezing; predictions
Abstract
The processes that are operative during fine-grained soil freezing with no applied surcharge are described and related to the rate of net heat extraction. One-dimensional frost heave experiments were carried out on a Canadian silty soil under various freezing conditions. It was established that the segregational heave rate is strongly dependent on the rate of heat removal. No water flow was observed at heat extraction rates between 0.35 and 0.45 mW/mm2. Maximum segregational heave rates occurred at rates of about 0.1 mW/ mm2. For the same soil, however, significant variations in segregational heave rates were measured for a given heat removal rate during transient freezing. Frost heave predictions using freezing tests at rates of heat extraction representative of field conditions are also discussed.
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  • Cold Regions Science and Technology 14, no. 2: 129–137.
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1535
NRC numberNRCC 28963
NRC-IRC-1255
NPARC number20378587
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Record identifiera9c60202-9795-4dc6-9b28-c8f08d397fef
Record created2012-07-24
Record modified2020-06-06
Date modified: