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DOI: 10.15862/16SATS120 (https://doi.org/10.15862/16SATS120)

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Zhaisambaev E.A., Kraev A.N., Kraev A.N., Vorontsov V.V. An experimental bench for studying the processes of freezing-thawing of soil in the laboratory. Russian Journal of Transport Engineering. 2020; 7(1). Available at: https://t-s.today/PDF/16SATS120.pdf (in Russian). DOI: 10.15862/16SATS120

An experimental bench for studying the processes of freezing-thawing of soil in the laboratory

Zhaisambaev Erkn Askerovich
Industrial university of Tyumen, Tyumen, Russia
E-mail: zhaysambaeverkn@mail.ru

Kraev Andrey Nikolaevich
Industrial university of Tyumen, Tyumen, Russia
E-mail: kraev-an@mail.ru

Kraev Aleksey Nikolaevich
Industrial university of Tyumen, Tyumen, Russia
E-mail: kraev_aln@mail.ru

Vorontsov Vyacheslav Viktorovich
Department of education of the administration of Tyumen, Tyumen, Russia
E-mail: VoroncovVV@tyumen-city.ru

Abstract. In the article, the authors consider the problem of building buildings and structures on permafrost soils, provides a brief overview of ways to preserve the frozen state of base soils. The analysis of scientific works devoted to the thermal interaction of an engineering structure with permafrost soils is given. Conducting full-scale experiments in the conditions of the spread of permafrost soils is a laborious and expensive undertaking, therefore, as part of the research, an experimental stand was developed that allows one to study the processes of freezing and thawing soils in laboratory conditions. The experimental stand is a soil tray with rigid walls and a bottom with overall dimensions in the plan of 1000×1000 mm and a height of 1000 mm. The open system was modeled by placing perforated pipes at the bottom of the tray with a heating cable installed inside the pipes, maintaining a positive water temperature. To ensure one-sided and plane-parallel freezing, the side surfaces and the bottom of the tray were glued with a heater. To fix the temperature of the soil in the experimental bench and the air temperature in the freezer, the TEREM 4-1 measuring complex with DTS 1-1 soil temperature sensors is used. To fix the movements of the soil base in the experimental bench, ICH-50 dial indicators with a division price of 0.01 mm on a telescopic magnetic stand are used. To study the processes of freezing thawing of soils, the authors propose a series of experimental studies on water-saturated loams in laboratory conditions. A description is given of an experimental bench with a model of a thermostabilizer for studying the processes of freezing-thawing of base soils in laboratory conditions, and a methodology for conducting experimental studies is described.

Keywords: perennially frozen soil; a seasonal-acting cooling device; thermal interaction; a freezing base-structure; a heat stabilizer; an experimental stand; a soil tray

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