Installations and methods for studying of mass transfer and swelling characteristics during soil freezing
Abstract
The article describes the methods of the experimental studies of the characteristics of soil freezing in accordance with the developed mathematical models of the authors. At the preliminary stage of research on the samples of relatively small size in a closed moisture-exchange system it is proposed to determine the influence of temperature regime, humidity, density and the presence of salts in pore solution on the main characteristic of moisture transfer during soil freezing – the coefficient of the thermal moisture conductivity of the frozen zone Km. The use of this coefficient, which is numerically equal to the moisture flux from the thawed zone to the frozen zone at a single temperature gradient, makes it possible to calculate moisture redistribution and frost heave in regard to the dynamics of the temperature field in the freezing ground.
The next stage of research is carried out at an installation with the open system of moisture exchange on cylindrical samples with the diameter and height of 100 mm. The specified ratio of dimensions with good lateral thermal insulation ensures their one-dimensional freezing. The created installation allows to realize different variants of the research of mass transfer and frost heaving characteristics, as well as maximum frost heaving pressure depending on the temperature on the cooled surface and conditions of the sample feeding with moisture or salt solution.
About the Authors
К. A. Agutin
Institute of Nature Management of the National Academy of Sciences of Belarus
Belarus
Belarus
Kirill A. Agutin – Researcher, Institute of Nature Management
10, F. Skoryna Str., 220076, Minsk
G. P. Brovka
Institute of Nature Management of the National Academy of Sciences of Belarus
Belarus
Belarus
Gennady P. Brovka – D. Sc. (Technical), Professor, Chief Researcher
10, F. Skoryna Str., Minsk, 220076, Minsk
I. V. Dedyulya
Ivan V. Dedyulya – Ph. D. (Technical), Associate Professor, Senior Researcher
Belarus
Belarus
Ivan V. Dedyulya – Ph. D. (Technical), Associate Professor, Senior Researcher
10, F. Skoryna Str., 220076, Minsk
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Review
For citations:
Agutin К.A., Brovka G.P., Dedyulya I.V. Installations and methods for studying of mass transfer and swelling characteristics during soil freezing. Nature Management. 2025;(1):148-158. (In Russ.)
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