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Record #96657:

Pore water pressure at an ice lens: its measurement and interpretation / J.-M. Konrad.

Title: Pore water pressure at an ice lens: its measurement and interpretation / J.-M. Konrad.
Author(s): Konrad, J. -M.
Date: 1989.
In: Cold Regions Science and Technology. (1989.), Vol. 16(1) (1989)
Abstract: One-dimensional freezing tests with fixed temperature boundary conditions and applied back-pressure to pore water were carried out in order to determine pore pressure at ice lens. It was established that tests with applied back-pressure result in same freezing characteristics as conventional tests. During closed-system freezing, pore pressure dropped continuously and reached value which was related to temperature at base of warmest ice lens at thermal steady state. For given soil, temperature is dependent on amount of cooling produced by removal of heat released at ice lens by migratory water and on amount of warming resulting from vertical settlement of base of ice lens caused by consolidation of unfrozen soil.
Notes:

Cold Regions Science and Technology. Vol. 16(1) :63-74 (1989).

Keywords: 551.343.7 -- Frost, soil moisture and surface water, effect on movement of.
551.343 -- Periglacial processes. Thermokarst.
E8 -- Glaciology: frost action and permafrost.
SPRI record no.: 96657

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245 10 ‡aPore water pressure at an ice lens :‡bits measurement and interpretation /‡cJ.-M. Konrad.
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500 ## ‡aCold Regions Science and Technology. Vol. 16(1) :63-74 (1989).
520 3# ‡aOne-dimensional freezing tests with fixed temperature boundary conditions and applied back-pressure to pore water were carried out in order to determine pore pressure at ice lens. It was established that tests with applied back-pressure result in same freezing characteristics as conventional tests. During closed-system freezing, pore pressure dropped continuously and reached value which was related to temperature at base of warmest ice lens at thermal steady state. For given soil, temperature is dependent on amount of cooling produced by removal of heat released at ice lens by migratory water and on amount of warming resulting from vertical settlement of base of ice lens caused by consolidation of unfrozen soil.
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650 07 ‡a551.343 -- Periglacial processes. Thermokarst.‡2udc
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