Predicting changes in the mechanical properties of frozen saline soils

Kotov, P. I.; Stanilovskaya, Julia Yu. V.

doi:10.1080/19648189.2021.1916604

Cited by 15 publications

(9 citation statements)

References 22 publications

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“…However, it is also possible to use table values for the thermal properties depending on water content and density [49]. Temperature and salinity impact all properties of frozen soil [50]. That is why it is so important to have these data for the Baydara test site.…”

Section: Lithology Composition and Physical Properties Of Soilsmentioning

confidence: 99%

Multi-Parameter Protocol for Geocryological Test Site: A Case Study Applied for the European North of Russia

et al. 2022

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An increase in air temperature leads to a significant transformation of the relief and landscapes of the Arctic. The rate of permafrost degradation, posing a profound change in the Arctic landscape, depends on air temperature, vegetation cover, type of soils, surface and ground waters. The existing international circumpolar programs dedicated to monitoring the temperature state of permafrost TSP (Thermal State Permafrost) and active layer thickness CALM (Circumpolar Active Layer Monitoring) are not sufficient for a comprehensive characterization of geocryological conditions. Yet, no standardized protocol exists for permafrost monitoring and related processes. Here, we propose a novel multi-parameter monitoring protocol and implement it for two sites in the European part of the Russian Arctic: the Yary site along the coast of the Baydaratskaya Bay in the Kara Sea (68.9° N) within the continuous permafrost area and the Hanovey site in the Komi Republic (67.3° N) within the discontinuous permafrost area. The protocol includes drilling boreholes, determining the composition and properties (vegetation cover and soils), snow cover measurement, geophysical imaging, active layer estimation and continuous ground temperature measurements. Ground temperature measured in 2014–2020 revealed that amplitudes of surface temperature fluctuations had no significant differences between the Yary and Hanovey sites, while that the mean annual temperatures between the areas had a considerable difference of greater than 3.0 °C. The period of the presence of the active layer changed with the year (e.g., ranging between 135 and 174 days in the Yary site), showing longer when the air temperatures in summer and the preceding winter were higher. Electrical resistivity tomography (ERT) allowed determining the permafrost distribution and active layer thicknesses. Thermometry results were consistent with our geophysical data. Analyzing the composition and properties of frozen soils helped better interpret the data of geophysical and temperature measurements. By integrating the study of the soil properties, ground temperatures, and ERT, our work allowed us to fully characterize these sites, suggesting that it helps better understand the thermal state at any other research sites in the European north of Russia. Our suggested monitoring protocol enables calibrating and verifying the numerical and analytical models of the heat transfer through the earth’s surface.

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Section: Lithology Composition and Physical Properties Of Soilsmentioning

confidence: 99%

Multi-Parameter Protocol for Geocryological Test Site: A Case Study Applied for the European North of Russia

et al. 2022

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“…But it is also possible to use table values thermal properties depending on water content and density [48]. Temperature and salinity impact on all properties of frozen soil [49]. That is why so important to have this data for Baydara test site.…”

Section: Lithology Composition and Physical Properties Of Soilsmentioning

confidence: 99%

Multi-Parameters Protocol for Geocryological Test Site: A case Study Applied in European North of Russia

Исаев¹,

Kioka²,

Kotov³

et al. 2022

Preprint

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An increase in air temperature leads to a significant transformation of the relief and landscapes of the Arctic. The rate of permafrost degradation, posing a profound change in the Arctic landscape, depends on air temperature, vegetation cover, type of soils, surface and ground waters. The existing international circumpolar programs dedicated to monitoring the temperature state of permafrost TSP (Thermal State Permafrost) and active layer thickness CALM (Circumpolar Active Layer Monitoring) are not sufficient for a comprehensive characterization of geocryological conditions. Yet, no standardized protocol exists for permafrost monitoring and related processes. Here, we propose a novel multi-parameter monitoring protocol and implement for two sites in the European part of the Russian Arctic: the Yary site along the coast of the Baydaratskaya Bay in the Kara Sea (68.9°N) within the continuous permafrost area and the Hanovey site in the Komi Re-public (67.3°N) within the discontinuous permafrost one. The protocol includes drilling boreholes, determining the composition and properties (vegetation cover and soils), snow cover measure-ment, geophysical imaging, active layer estimation and continuous ground temperature meas-urements. Ground temperature measured in 2014 – 2020 revealed that amplitudes of surface tem-perature fluctuation had no significant difference between the Yary and Hanovey sites, while that the mean annual temperatures between the areas had a considerable difference of greater than 3.0 °C. The period of the presence of the active layer changed with the year (e.g., ranging between 135 and 174 days in the Yary site), showing longer when the air temperatures in summer and the preceding winter were higher. Electrical resistivity tomography (ERT) allowed determining the permafrost distribution and active layer thicknesses. Thermometry results were consistent with our geophysical data. Analyzing the composition and properties of frozen soils helped better interpret the data of geophysical and temperature measurements. Our work by integrating the study of the soil properties, ground temperatures, and ERT allowed fully characterize these sites, suggesting that it helps better understand the thermal state in any other research sites in the European north of Russia. Our suggested monitoring protocol enables calibrating and verifying the numerical and analytical models of the heat transfer through the earth’s surface.

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“…The effect of climate change on the stability of infrastructure will depend on the construction principle (Belotserkovskaya 1990). The least stable foundations, constructed according to Principle I will decrease their mechanical characteristics (Kotov and Stanilovskaya 2021) and bearing capacity (Streletskiy et al 2012a) due to an increase of ground temperature. There is no official data about how many buildings were built according to Principle 1.…”

Section: Climate Change In the Vorkuta Regionmentioning

confidence: 99%

Building Stability On Permafrost In Vorkuta, Russia

Kotov

Khilimonyuk

2021

GES

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The Infrastructure stability on permafrost is currently an important topic as the Arctic countries are developing climate change adaptation and mitigation programs. Assessing the sustainability of infrastructure facilities (especially in urban environments) is a difficult task as it depends on many parameters. This article discusses the city of Vorkuta, which is located in the northwest of Russia. This city differs from many others built on permafrost because most of buildings were built according to Principle II (The Active Method) of construction on permafrost with thawing soil prior to construction. Assessments of the engineering and geocryological conditions, basic principles of construction in the city, and reasons for building failures, were carried out within this study. The research is based on publications, open data about buildings, and visual observations in Vorkuta. About 800 buildings are in use in Vorkuta in 2020 (43% of what it was 50 years ago). According to the analysis, about 800 houses have been demolished or disconnected from utility lines over the past 50 years (about 250 of these are still standing, pending demolition). Since 1994, the construction of new residential buildings has almost stopped. Therefore, buildings that have been in use for over 50 years will account for 90% of the total residential housing stock by 2040. The effects of climate change in the city will depend primarily on the principle of construction employed and on the geocryological conditions of the district. Buildings constructed according to Principle I (The Passive Method) were found to be more vulnerable due to a decrease in permafrost bearing capacity. The impact of increasing air temperature on some of the buildings built on bedrock (the central part of the city) and some built on thawing soil will be minimal, as other factors are more significant.

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Predicting changes in the mechanical properties of frozen saline soils

Cited by 15 publications

References 22 publications

Multi-Parameter Protocol for Geocryological Test Site: A Case Study Applied for the European North of Russia

Multi-Parameter Protocol for Geocryological Test Site: A Case Study Applied for the European North of Russia

Multi-Parameters Protocol for Geocryological Test Site: A case Study Applied in European North of Russia

Building Stability On Permafrost In Vorkuta, Russia

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