The Deformation Properties of Warm Underocean Permafrost

by Donald Shields, Univ of Manitoba, Civil Engineering, Dep, Winnipeg, Manit, Canada,
Leonard Domaschuk, Univ of Manitoba, Civil Engineering, Dep, Winnipeg, Manit, Canada,
Herbert Fensury, Univ of Manitoba, Civil Engineering, Dep, Winnipeg, Manit, Canada,
Robert Kenyon, Univ of Manitoba, Civil Engineering, Dep, Winnipeg, Manit, Canada,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract:

Two quasi-conventional incremental pressuremeter tests were carried out on man-made specimens of 'warm' ( minus 3 degree C) frozen, saturated sand. Instead of each increment of pressure lasting one minute, as is the case in the conventional pressuremeter test, each increment was maintained for 45 minutes. The results of these two tests were used to determine the creep parameters required for Ladanyi's theory for the long term creep behaviour of frozen soil. Ladanyi's theory was then used to predict the creep strain during four long term constant pressure pressuremeter tests. The Ladanyi's method was not able to predict the long term creep behaviour of a warm frozen sand on the basis of short term (forty-five minutes) tests.

Subject Headings: Frozen soils | Soil properties | Soil pressure | Creep | Measuring instruments | Soil tests | Soil classification

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