Research of permafrost soil thawing under the structural foundation platform

Inzhutov, Ivan; Zhadanov, V I; Nazirov, Rashit A.; Серватинский, Вадим Вячеславович; Semenov, M Yu; Amelchugov, Sergei; Archipov, I N; Goncharov, Yu. M.; Chaikin, E A

doi:10.1088/1757-899x/456/1/012046

Cited by 8 publications

(2 citation statements)

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“…The paper shows that heat transfer by convection can have a significant effect on permafrost thawing in the presence of heat sources. Implementation of numerical simulation in software systems such as COMSOL [20,43] or ANSYS [44] opens up wide opportunities for modeling thermal processes in the "pile foundationsoil" system and developing new technical devices for soil thermal stabilization. These capabilities are usually not available in highly specialized programs for calculating the thermal stabilization of soils, designed mainly for the calculation of ventilated basements, the configuration of thermosiphons, etc.…”

Section: Figure 9 the Concept Of Modular Pile Structures For The Arcticmentioning

confidence: 99%

Thermal Stabilization of Permafrost Using Thermal Coils Inside Foundation Piles

2023

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The article deals with the issue of thermal stabilization of soils to preserve the stability of pile foundations in permafrost conditions. The purpose of the work is to develop a technology for year-round freezing of soils by supplying coolant cooled by a refrigeration machine to thermal elements placed inside piles. In this work, the temperature regime of the system "pile foundation – soil" in the stationary formulation of the problem was simulated, and the influence of the depth of placement of thermal elements inside the piles on the soil temperature was investigated. The simulation was performed in the COMSOL software environment, taking into account the heat transfer due to thermal conduction and convection. In the presented model, a platform is fixed on piles, and a heat source is placed on the platform. It is found that an area of thawed soil has formed on the leeward side of the pile foundation. It is concluded that, under certain conditions, deep thermal elements for freezing or keeping the soil frozen should be placed at different depths. Thus, under given conditions, a greater depth of the thermal element placement in the pile, closest to the soil thawing zone, allows to reduce the surface temperature of the pile below ground level and, therefore, increase its bearing capacity. The authors also propose an original unit for soil thermostabilization based on the absorption cooling machine, which can operate at the expense of thermal energy generated by technological sources located on the platform. Doi: 10.28991/CEJ-2023-09-04-013 Full Text: PDF

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Section: Figure 9 the Concept Of Modular Pile Structures For The Arcticmentioning

confidence: 99%

Thermal Stabilization of Permafrost Using Thermal Coils Inside Foundation Piles

2023

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“…According to the set of requirements, the recommended height of the ventilated space of the platform is 1.5 m [9].…”

Section: Spatial Foundation Platform In the Form Of Plate-rod Structurementioning

confidence: 99%

A comparative analysis of foundation design solutions on permafrost soils

et al. 2019

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The article analyzes design solutions of foundations on permafrost soils, their advantages and disadvantages. Innovative design solutions that increase the energy efficiency of buildings are proposed. Examples of innovative foundations of platform type are given. Spatial ventilated foundations are less sensitive to soil deformation. The construction of such a foundation can be made of various materials such as reinforced concrete, metal and timber. A spatial foundation platform based on timber is proposed as one of the innovative examples, which is a promising constructive solution of foundations for construction in the Arctic regions. Wood has a small coefficient of thermal conductivity, which significantly increases the energy efficiency of the structure as a whole. Due to prefabrication of timber structures, the speed of construction is increased. Platforms can have solutions in the form of: system of cross beams, structural plates, plate-rod structure, as well as in the form of shells and folds. Regardless of the design solution, the spatial foundation platform is prefabricated.

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