Two-parameter temperature criterion for the onset of cryogenic moisture transfer for solving problems of regulating moisture accumulation in freezing soils
https://doi.org/10.52170/1815-9265_2024_69_98
Abstract
The article introduces a temperature functional, with temperature of the soil and its gradient along the vertical axis in freezing clay soil as its arguments, by which a two-parameter criterion for the onset of intense cryogenic capillary-film water transfer is formulated for addressing moisture regulation tasks in freezing soils.
An algorithm for solving the problem of determining the lower boundary of the cryogenic water transfer zone in the soil mass, at any stage of its freezing, using a special module Freeze-1a within the Freeze-1 software complex, is presented.
An example of determining the functional dependence used in the two-parameter criterion for the onset of intense cryogenic water transfer in laboratory conditions is provided for an operational section of the roadbed composed of clay with a plasticity index of 0.10.
Verification of the calculation algorithm for determining the lower boundary of the intense cryogenic water transfer zone according to the two-parameter temperature criterion using the results of monitoring the water-thermal regime on a section of the operational roadbed has been conducted. The obtained data allowed concluding on the correctness of the proposed approach to determining the level of the lower boundary of the intense cryogenic water transfer zone. Additionally, they demonstrated sufficient convergence between calculated and actual depths of soil freezing in the roadbed, indicating the adequacy of the one-dimensional temperature field model determined using the Freeze-1 software complex.
Supporting agencies: The research was carried out with the financial support of Russian Railways (grant for the development of research-pedagogical schools in the field of railway transport).
About the Authors
D. A. Razuvaev
Siberian Transport University
Russian Federation
Russian Federation
Denis A. Razuvaev – Head of the Quality Control of Pavements and Subgrades Research Laboratory, Candidate of Engineering, Associate Professor
Novosibirsk
A. L. Isakov
Siberian Transport University
Russian Federation
Russian Federation
Alexander L. Isakov – Head of the Survey, Design and Construction of Railways and Roads Department, Doctor of Engineering, Professor
Novosibirsk
M. G. Chakhlov
Siberian Transport University
Russian Federation
Russian Federation
Mikhail G. Chakhlov – researcher
Novosibirsk
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Review
For citations:
Razuvaev D.A., Isakov A.L., Chakhlov M.G. Two-parameter temperature criterion for the onset of cryogenic moisture transfer for solving problems of regulating moisture accumulation in freezing soils. Bulletin of Siberian State University of Transport. 2024;(2):98-105. (In Russ.) https://doi.org/10.52170/1815-9265_2024_69_98
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