Improvement of Field Methods for Engineering Geocryological Surveying

Tyurin, A. I.; Исаев, В. С.; Sergeev, D. O.; Tumskoi, V. E.; Volkov, N. G.; Sokolov, I. S.; Komarov, O. I.; Koshurnikov, Andrey; Gunar, A. Yu.; Komarov, I.; Anan’ev, V. V.

doi:10.3103/s014587521903013x

Cited by 3 publications

(2 citation statements)

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“…The warming effects can worsen if inadequate construction methods and procedures are adopted, such as soil compaction, removal of peat, and destruction of the vegetation cover (Drozdov et al, 2015). Monitoring of the extension and thickness of permafrost and active layer by employing different investigation methodologies is fundamental for designing effective infrastructure consolidation plans and targeted solutions (e.g., Schwamborn et al, 2008;Voytenko and Sergeev, 2016;Gilbert et al, 2019;Tyurin et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Active Layer and Permafrost Investigations Using Geophysical and Geocryological Methods—A Case Study of the Khanovey Area, Near Vorkuta, in the NE European Russian Arctic

et al. 2022

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Permafrost in the NE European Russian Arctic is suffering from some of the highest degradation rates in the world. The rising mean annual air temperature causes warming permafrost, the increase in the active layer thickness (ALT), and the reduction of the permafrost extent. These phenomena represent a serious risk for infrastructures and human activities. ALT characterization is important to estimate the degree of permafrost degradation. We used a multidisciplinary approach to investigate the ALT distribution in the Khanovey railway station area (close to Vorkuta, Arctic Russia), where thaw subsidence leads to railroad vertical deformations up to 2.5 cm/year. Geocryological surveys, including vegetation analysis and underground temperature measurements, together with the faster and less invasive electrical resistivity tomography (ERT) geophysical method, were used to investigate the frozen/unfrozen ground settings between the railroad and the Vorkuta River. Borehole stratigraphy and landscape microzonation indicated a massive prevalence of clay and silty clay sediments at shallow depths in this area. The complex refractive index method (CRIM) was used to integrate and quantitatively validate the results. The data analysis showed landscape heterogeneity and maximum ALT and permafrost thickness values of about 7 and 50 m, respectively. The active layer was characterized by resistivity values ranging from about 30 to 100 Ωm, whereas the underlying permafrost resistivity exceeded 200 Ωm, up to a maximum of about 10 kΩm. In the active layer, there was a coexistence of frozen and unfrozen unconsolidated sediments, where the ice content estimated using the CRIM ranged from about 0.3 – 0.4 to 0.9. Moreover, the transition zone between the active layer base and the permafrost table, whose resistivity values ranged from 100 to 200 Ωm for this kind of sediments, showed ice contents ranging from 0.9 to 1.0. Taliks were present in some depressions of the study area, characterized by minimum resistivity values lower than 10 Ωm. This thermokarst activity was more active close to the railroad because of the absence of insulating vegetation. This study contributes to better understanding of the spatial variability of cryological conditions, and the result is helpful in addressing engineering solutions for the stability of the railway.

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Section: Introductionmentioning

confidence: 99%

Active Layer and Permafrost Investigations Using Geophysical and Geocryological Methods—A Case Study of the Khanovey Area, Near Vorkuta, in the NE European Russian Arctic

et al. 2022

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“…Traditional methods of geocryology used to study frozen rocks require improvement [16], because the data obtained by these methods, as a rule, are point-like, and do not allow full evaluation of the geocryological conditions in sufficiently large areas. Several modern methods of geocryology include methods of geophysics (for example, vertical electric sounding [16]), which can be used to search and determine the parameters of underground ice.…”

Section: Introductionmentioning

confidence: 99%

Prospecting and Evaluation of Underground Massive Ice by Ground-Penetrating Radar

2020

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Data from geocryological studies of soil and rock massifs in permafrost zone are very important as a basis for predicting possible negative consequences associated with climate change. A promising technique for studying geocryological structures (various types of underground ice) is the ground-penetrating radar (GPR) method. This paper presents the applications of the GPR method to prospect and evaluate massive ice in a frozen rock mass. To study the features of GPR signals received during sounding of underground ice, a model of a single GPR trace for the structure “frozen rock-ice-frozen rock” was developed. As a result, regularities were established in the kinematic and dynamic characteristics of GPR signals at the upper and lower boundaries of massive ice, depending on its geometric parameters. The established features were confirmed by the results of computer and physical simulation of GPR measurements of a frozen rock mass model. The main result of the study was to obtain a set of criteria for identifying massive ice according to GPR measurements. The developed criteria will allow the use of GPR for a detailed study of the structure of permafrost rocks to prevent the development of dangerous cryogenic processes in undisturbed and urban areas of the Arctic.

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The Principles of Complex Geocryological Geophysical Analysis for Studying Permafrost and Gas Hydrates on the Arctic Shelf of Russia

Koshurnikov

2020

Moscow Univ. Geol. Bull.

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Improvement of Field Methods for Engineering Geocryological Surveying

Cited by 3 publications

References 0 publications

Active Layer and Permafrost Investigations Using Geophysical and Geocryological Methods—A Case Study of the Khanovey Area, Near Vorkuta, in the NE European Russian Arctic

Active Layer and Permafrost Investigations Using Geophysical and Geocryological Methods—A Case Study of the Khanovey Area, Near Vorkuta, in the NE European Russian Arctic

Prospecting and Evaluation of Underground Massive Ice by Ground-Penetrating Radar

The Principles of Complex Geocryological Geophysical Analysis for Studying Permafrost and Gas Hydrates on the Arctic Shelf of Russia

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