Ageing deformation of tailings dams in seasonally frozen soil areas under freeze-thaw cycles

Jin, Jiaxu; Li, Shiwang; Song, Chenguang; Zhang, Xinlei; Lv, Xiangfeng

doi:10.1038/s41598-019-51449-6

Cited by 15 publications

(8 citation statements)

References 31 publications

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“…Thus in the tropical zone, the frequency and intensity of rainfall may directly affect the transport infrastructure and indirectly affect commercial and residential buildings due to the rainfall-induced landslides near cities. Cracks in roads and damage to tailings dams have been observed in the polar zones due to the snow and seasonally frozen soil (Jin et al, 2019).…”

Section: Climate Change and Land Use Impacts On The Artificial Systemsmentioning

confidence: 99%

Application of HEC-RAS/WMS and FHI models for extreme hydrological events under climate change in the Ifni River arid watershed from Morocco

Ikirri

Faïk

Boutaleb

et al. 2021

Climate and Land Use Impacts on Natural and Artificial Systems

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Section: Climate Change and Land Use Impacts On The Artificial Systemsmentioning

confidence: 99%

Application of HEC-RAS/WMS and FHI models for extreme hydrological events under climate change in the Ifni River arid watershed from Morocco

Ikirri

Faïk

Boutaleb

et al. 2021

Climate and Land Use Impacts on Natural and Artificial Systems

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“…Scholars at home and abroad have contributed certain research results regarding the mechanical properties and deterioration characteristics of geotechnical materials 11 – 15 ; many found that soil sites are vulnerable to erosion by the natural environment, and a large number of cracks generally develop on the surface, where dry shrinkage and freeze-thaw are common influencing factors 16 , 17 . Much of the current research has focused on the macro-microscopic changes in the development of fractures in soil samples under dry shrinkage and freeze-thaw conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on the factors affecting cracking of earthen soil under dry shrinkage and freeze–thaw conditions

Yue

Huang

Zhao

et al. 2022

Sci Rep

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Earthen sites are easily eroded by the natural environment, resulting in many micro-cracks on the surface. To explore the effects of environmental effects such as drying shrinkage and freeze–thaw on surface cracking, orthogonal tests that imposed these effects on the Zhouqiao site were conducted. Using range analysis, image processing technology, surface strength measurement and microstructure characteristic analysis, this paper explores the effects of soil thickness, water content, dry shrinkage, freeze–thaw cycles and other factors on the morphological characteristics of the site’s surface cracks. The results show that under the action of dry shrinkage, the thickness of soil layer is the primary factor affecting the cracking of earthen soil. The thinner the thickness of soil layer, the lower the moisture content, and the more serious the cracking. The initial moisture content is the most disadvantageous factor affecting the reduction of the surface strength of the earthen soil. The strength around the soil sample is lower than that inside, and there are more cracks. Under the action of freezing and thawing, the main factors affecting the cracking and surface strength reduction of earthen soil are the initial water content and soil layer thickness, and the thicker the soil layer, the smaller the crack development and the lower the surface strength. Scanning electron microscope results show that under dry shrinkage and freeze–thaw conditions, the internal cracks of the soil samples exhibit different shape characteristics. Intergranular cracks appear most often under dry shrinkage conditions, and isolated cracks appear most often in the soil samples from the freeze–thaw cycle test. The cracks caused by these two types of external environment factors damage the earthen soil. According to the tension failure model and the definition of the first frost heaving theory, it can be determined that when the micro pore force F and the maximum frost heaving pressure PImax are greater than the cohesion of the soil sample, the soil sample will germinate cracks.

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“…Numerous researchers [6][7][8][9] have investigated the effect of freeze-thaw cycles on the mechanical properties of tailings through a vast number of experimental and theoretical studies. Yang proposed stress-strain curves for seasonal and permafrost soils for various influencing parameters using indoor uniaxial compression tests.…”

Section: Introductionmentioning

confidence: 99%

Effect of Freeze–Thaw Cycles on Shear Strength of Tailings and Prediction by Grey Model

Jin

et al. 2022

Minerals

Self Cite

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Tailings dams in the seasonal frozen regions experience freeze–thaw cycles with the change in natural geography and climatic conditions, which may have a strong influence on the mechanical properties of the tailings. In this paper, the effects of freeze–thaw cycles on the mechanical properties and pore structure of tailings were investigated. Triaxial tests were carried out on tailings with different moisture contents (5%, 10%, 15%, 20%) under different confining pressures (50 kPa, 100 kPa, 200 kPa, 300 kPa) after different freeze–thaw cycles (10, 20, 30, 40, 50). The pore structures of tailings were quantitatively analyzed as well. Furthermore, grey system theory was applied to develop a shear strength prediction model for tailings in cold regions. The results showed that the optimal moisture content of tailings fell 10%–15%. The shear strength of the tailings increased under higher confining pressures, while it decreased after more freeze–thaw cycles. Irrecoverable large pore deformation between particles within the tailings was found after 40 freeze–thaw cycles. After 50 freeze–thaw cycles, the proportion of pores larger than 100 μm increased from 22.76% to 48.45%. Predictions based on the Grey Model were found to be consistent with the test results and the shear strength test law. The residual error and class ratio dispersion of the model were less than 0.2, indicating that the Grey Model has high prediction accuracy and thus can be used for the prediction of the shear strength of tailings.

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Ageing deformation of tailings dams in seasonally frozen soil areas under freeze-thaw cycles

Cited by 15 publications

References 31 publications

Application of HEC-RAS/WMS and FHI models for extreme hydrological events under climate change in the Ifni River arid watershed from Morocco

Application of HEC-RAS/WMS and FHI models for extreme hydrological events under climate change in the Ifni River arid watershed from Morocco

Study on the factors affecting cracking of earthen soil under dry shrinkage and freeze–thaw conditions

Effect of Freeze–Thaw Cycles on Shear Strength of Tailings and Prediction by Grey Model

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