EXPERIMENTAL STUDIES OF THE EFFECT OF FREEZING TEMPERATURE REGIME ON FILTRATION PROPERTIES OF FINELY DISPERSED MODEL SOIL
V.S. Kolunin1,2, Z.A. Ishkova1
1Tyumen Research Centre, Siberian branch of the Russian Academy of Sciences, Earth Cryosphere Institute, Tyumen, Russia
2Tyumen State Oil-and-Gas University, Tyumen, Russia
Keywords: frozen ground, freeze-thaw cycles, filtration, water permeability coefficient
Abstract
The results of experimental studies of the influence of the initial freezing conditions and heating-cooling cycles of a finely dispersed model soil (kaolinite clay in a fully water-saturated state with the moisture content of 0.43-0.51) on its water filtration properties in the frozen state are presented. The filtration capacity of frozen kaolinite clay depends not only on its temperature but also on the freezing conditions. Graphs of the water permeability coefficient of the frozen soil versus temperature in the range of -0.05…-0.3 °C have been obtained for various soil freezing conditions. These graphs demonstrate the significant influence of freezing conditions on the filtration properties of frozen soil. Experimental research in this area is important for predicting the behavior of frozen heavy-textured soils near the initial freezing temperature, which is especially relevant in a changing climate.
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