Freeze–thaw properties and long-term thermal stability of the unprotected tower foundation soils in permafrost regions along the Qinghai–Tibet Power Transmission Line

Li, Guoyu; Yu, Qihao; Ma, Wei; Chen, Zhaoyu; Mu, Yanhu; Guo, Lei; Wang, Fei

doi:10.1016/j.coldregions.2015.05.004

Cited by 37 publications

(19 citation statements)

References 31 publications

(27 reference statements)

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“…It is now recognized as a hot topic in permafrost studies . As emphasized above, cryohydrogeological modeling is vital for biogeochemical studies of boreal areas, but there are many other potential fields of application of cryohydrogeological models, such as geotechnics, long‐term storage of nuclear waste, water resources in cold regions, thermal transfer around pipelines in cold regions, infrastructure stability and geothermics in cold regions …”

Section: Introductionmentioning

confidence: 99%

“…15,16 It is now recognized as a hot topic in permafrost studies. 4 As emphasized above, cryohydrogeological modeling is vital for biogeochemical studies of boreal areas, but there are many other potential fields of application of cryohydrogeological models, such as geotechnics, 17 long-term storage of nuclear waste, [18][19][20] water resources in cold regions, 21,22 thermal transfer around pipelines in cold regions, 23,24 infrastructure stability [25][26][27] and geothermics in cold regions. 28 One of the major difficulties in cryohydrogeological modeling lies in the fine temporal and spatial resolution needed to numerically solve the equations involved.…”

Section: Introductionmentioning

confidence: 99%

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Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: The key role of rooting depth

Orgogozo

Прокушкин

Pokrovsky

et al. 2019

Permafrost & Periglacial

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To quantify the impact of evapotranspiration phenomena on active layer dynamics in a permafrost‐dominated forested watershed in Central Siberia, we performed a numerical cryohydrological study of water and energy transfer using a new open source cryohydrogeology simulator, with two innovative features: spatially distributed, mechanistic handling of evapotranspiration and inclusion of a numerical tool in a high‐ performance computing toolbox for numerical simulation of fluid dynamics, OpenFOAM. In this region, the heterogeneity of solar exposure leads to strong contrasts in vegetation cover, which constitutes the main source of variability in hydrological conditions at the landscape scale. The uncalibrated numerical results reproduce reasonably well the measured soil temperature profiles and the dynamics of infiltrated waters revealed by previous biogeochemical studies. The impacts of thermo‐hydrological processes on water fluxes from the soils to the stream are discussed through a comparison between numerical results and field data. The impact of evapotranspiration on water fluxes is studied numerically, and highlights a strong sensitivity to variability in rooting depth and corresponding evapotranspiration at slopes of different aspect in the catchment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: The key role of rooting depth

Orgogozo

Прокушкин

Pokrovsky

et al. 2019

Permafrost & Periglacial

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“…Soil freeze-thaw dynamics result in a phase change between unfrozen water and ice [13,21], hydrothermal migration [22,23], release of greenhouse gas(es) [24], and salt accumulation [25,26] that alter energy and mass exchange at the soil-atmosphere interface. Frozen soil, therefore, impacts agricultural, engineering, and environmental practices and socio-economic development in cold regions [12,14,[27][28][29][30][31][32][33]. Global climate change makes its effects more complicated [2,29,[34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

A Scientometric Review of Research Status on Unfrozen Soil Water

Feng

Zhang

et al. 2021

Water

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Unfrozen soil water affects the physical, chemical, hydrological, and mechanical properties of frozen soils, and climate change makes these relationships more complicated. The objective of this study was to investigate the research status of unfrozen soil water using scientometrics. Publications on unfrozen water in frozen soil (UWFS) retrieved from the Web of Science were analyzed with scientometric software tools including VOSviewer, CiteSpace, and HistCite Pro. The annual publication trend, co-authorship of authors, organizations, and countries, and the co-occurrence of keywords were analyzed. The most utilized journals and high-impact publications were identified. The results showed that 2007 (the year the “Bali Road Map” was released) represents a turning point (from slow to rapid) in the development of research on unfrozen water in frozen soil. Researchers and organizations from China and the United States are the major contributors, while Cold Regions Science and Technology is the most utilized journal for publishing research pertaining to UWFS. Currently, there is still a lack of reliable and user-friendly methods and techniques for measuring unfrozen water content. Future efforts are required to understand the mechanisms governing the magnitude of unfrozen water content and to develop new approaches to accurately and rapidly measure unfrozen water content in both laboratory and in situ.

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“…Therefore, this foundation is widely used for the power transmission project from Qinghai to Tibet. The performance of its practical application, including the estimation of settlement [5], the freeze-thaw properties and thermal stability [6], the impact on the permafrost [7], and the displacement characteristics and mechanisms [8], thermal stability [6], the impact on the permafrost [7], and the displacement characteristics and mechanisms [8], has been widely studied. Wen et al [9] analyzed the influence of frost heaving force on the stress and deformation characteristics of tower foundations in Qinhai Tibet Plateau, and proposed that the use of thermosyphons may effectively reduce the settlement of the foundation, but will increase the risk of frost jacking.…”

Section: Introductionmentioning

confidence: 99%

Uplift Bearing Capacity of Cone-Cylinder Foundation for Transmission Line in Frozen Soil Regions, Using Reduced-Scale Model Tests and Numerical Simulations

et al. 2020

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In order to analyze the uplift bearing capacity of cone-cylinder foundation for transmission line in frozen soil regions, a series of reduced-scale modeling tests and numerical simulations are carried out. First, three reduced-scale cone-cylinder foundations with the same sizes, that are five times smaller than the prototype, are made and then loaded under uplift load at −5 • C, −10 • C, and −15 • C, respectively. On this basis, the foundations of nine sizes are modeled and loaded by numerical simulation. The impact of three dimension factors, including the ratio of depth to bottom width (λ = h t /D t ), the top diameter of the cone-cylinder (d), and the bottom diameter of the cone-cylinder (D), on the uplift bearing capacity of foundations have been investigated. The results reveal that, for cone-cylinder foundation, the uplift bearing capacity is obviously affected by the freezing temperatures and the foundation sizes. The capacity is negatively correlated with the former. Whereas the order of correlation with the latter is as follows: λ, D, and d based on the comprehensive results of range and variance analysis, but none of them are the significant factors, according to the F-test. Furthermore, three failure mechanisms of frozen soil are distinguished and named T-mode, V-mode, and U-mode, respectively. Based on the above results, the bearing mechanism of cone-cylinder foundation in frozen soil is elaborated in detail.

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Freeze–thaw properties and long-term thermal stability of the unprotected tower foundation soils in permafrost regions along the Qinghai–Tibet Power Transmission Line

Cited by 37 publications

References 31 publications

Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: The key role of rooting depth

Water and energy transfer modeling in a permafrost‐dominated, forested catchment of Central Siberia: The key role of rooting depth

A Scientometric Review of Research Status on Unfrozen Soil Water

Uplift Bearing Capacity of Cone-Cylinder Foundation for Transmission Line in Frozen Soil Regions, Using Reduced-Scale Model Tests and Numerical Simulations

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