Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation
With the onset of global warming, the environment has profoundly changed. The melting of ice and slope instability were widely observed in the permafrost regions of the Qinghai–Tibet Plateau, which has destroyed infrastructure and threatened people’s safety. For this study, we conducted a direct she...
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ftmdpi:oai:mdpi.com:/2071-1050/14/15/9401/ 2023-08-20T04:07:07+02:00 Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation Bao Zhou Yingli Zhang Sailajia Wei Zhongfu Wang Wenfeng Zhu Zhijia Xue agris 2022-08-01 application/pdf https://doi.org/10.3390/su14159401 EN eng Multidisciplinary Digital Publishing Institute Sustainable Materials https://dx.doi.org/10.3390/su14159401 https://creativecommons.org/licenses/by/4.0/ Sustainability; Volume 14; Issue 15; Pages: 9401 slope instability permafrost region shear strength parameter numerical simulation Text 2022 ftmdpi https://doi.org/10.3390/su14159401 2023-08-01T05:55:29Z With the onset of global warming, the environment has profoundly changed. The melting of ice and slope instability were widely observed in the permafrost regions of the Qinghai–Tibet Plateau, which has destroyed infrastructure and threatened people’s safety. For this study, we conducted a direct shear test, monitored field temperature, and performed a numerical simulation to explore the mechanism of slope instability in the permafrost regions of the Qinghai. The results show that the shear strength of the permafrost soil decreased with the increases in water content and thawing condition. Moreover, the thawing depth of the slopes increased with the rising temperature. From the temperature monitoring data and field observations, cracks and slope instability phenomena were observed in the Qinghai and occurred with the thawing of the permafrost soil. The safety of slopes in the permafrost regions decreased with increases in the temperature, slope gradient, and pore water pressure and with decreases in the shear strength parameters. In addition, the sliding interface had a direct correlation with the freeze–thaw interface, which is a migrated interface of water in liquid form. Therefore, the thawing of the permafrost soil causes the shear strength to decrease and pore water pressure to increase, which leads to slope instability in the permafrost regions of the Qinghai. Text Ice permafrost MDPI Open Access Publishing Sustainability 14 15 9401 |
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English |
topic |
slope instability permafrost region shear strength parameter numerical simulation |
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slope instability permafrost region shear strength parameter numerical simulation Bao Zhou Yingli Zhang Sailajia Wei Zhongfu Wang Wenfeng Zhu Zhijia Xue Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation |
topic_facet |
slope instability permafrost region shear strength parameter numerical simulation |
description |
With the onset of global warming, the environment has profoundly changed. The melting of ice and slope instability were widely observed in the permafrost regions of the Qinghai–Tibet Plateau, which has destroyed infrastructure and threatened people’s safety. For this study, we conducted a direct shear test, monitored field temperature, and performed a numerical simulation to explore the mechanism of slope instability in the permafrost regions of the Qinghai. The results show that the shear strength of the permafrost soil decreased with the increases in water content and thawing condition. Moreover, the thawing depth of the slopes increased with the rising temperature. From the temperature monitoring data and field observations, cracks and slope instability phenomena were observed in the Qinghai and occurred with the thawing of the permafrost soil. The safety of slopes in the permafrost regions decreased with increases in the temperature, slope gradient, and pore water pressure and with decreases in the shear strength parameters. In addition, the sliding interface had a direct correlation with the freeze–thaw interface, which is a migrated interface of water in liquid form. Therefore, the thawing of the permafrost soil causes the shear strength to decrease and pore water pressure to increase, which leads to slope instability in the permafrost regions of the Qinghai. |
format |
Text |
author |
Bao Zhou Yingli Zhang Sailajia Wei Zhongfu Wang Wenfeng Zhu Zhijia Xue |
author_facet |
Bao Zhou Yingli Zhang Sailajia Wei Zhongfu Wang Wenfeng Zhu Zhijia Xue |
author_sort |
Bao Zhou |
title |
Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation |
title_short |
Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation |
title_full |
Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation |
title_fullStr |
Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation |
title_full_unstemmed |
Slope Instability Analysis in Permafrost Regions by Shear Strength Parameters and Numerical Simulation |
title_sort |
slope instability analysis in permafrost regions by shear strength parameters and numerical simulation |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/su14159401 |
op_coverage |
agris |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Sustainability; Volume 14; Issue 15; Pages: 9401 |
op_relation |
Sustainable Materials https://dx.doi.org/10.3390/su14159401 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/su14159401 |
container_title |
Sustainability |
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14 |
container_issue |
15 |
container_start_page |
9401 |
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1774718560388513792 |