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Experimental study on shear strength of saturated remolded loess
Loess has the characteristics of large porosity, loose structure, uniform composition and strong collapsibility. When encountering heavy rainfall and irrigation prone to saturation, resulting in loess landslides, roadbed subsidence and dam instability. In order to study the effect of dry density and...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9282495/ https://www.ncbi.nlm.nih.gov/pubmed/35834541 http://dx.doi.org/10.1371/journal.pone.0271266 |
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author | Lai, Jie Liu, Yun Xiang, Yuzhou Wang, Wei Xu, Jiangbo Cao, Baohua Zhao, Danni Wei, Wei Bao, Han Yan, Changgen Lan, Hengxing |
author_facet | Lai, Jie Liu, Yun Xiang, Yuzhou Wang, Wei Xu, Jiangbo Cao, Baohua Zhao, Danni Wei, Wei Bao, Han Yan, Changgen Lan, Hengxing |
author_sort | Lai, Jie |
collection | PubMed |
description | Loess has the characteristics of large porosity, loose structure, uniform composition and strong collapsibility. When encountering heavy rainfall and irrigation prone to saturation, resulting in loess landslides, roadbed subsidence and dam instability. In order to study the effect of dry density and shear rate on the shear strength of saturated remolded loess, the consolidated undrained (CU) test was carried out in Yan’an City by using SLB-6A stress-strain controlled triaxial shear permeability test instrument. The shear rate, confining pressure and dry density were controlled during the test. The dry densities of the samples were 1.5 g / cm3, 1.6 g / cm3 and 1.7 g / cm3, respectively. CU tests of saturated remolded loess were carried out at different shear rates under the confining pressures of 100 kPa, 150 kPa and 200 kPa, respectively. It is found that the stress-strain curve of saturated remolded loess gradually moves upward with the increase of dry density. With the increase of dry density, the cohesion and internal friction angle of remolded saturated loess samples increase. At the same shear rate, with the increase of dry density, the deviatoric stress of the specimen increases significantly. |
format | Online Article Text |
id | pubmed-9282495 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-92824952022-07-15 Experimental study on shear strength of saturated remolded loess Lai, Jie Liu, Yun Xiang, Yuzhou Wang, Wei Xu, Jiangbo Cao, Baohua Zhao, Danni Wei, Wei Bao, Han Yan, Changgen Lan, Hengxing PLoS One Research Article Loess has the characteristics of large porosity, loose structure, uniform composition and strong collapsibility. When encountering heavy rainfall and irrigation prone to saturation, resulting in loess landslides, roadbed subsidence and dam instability. In order to study the effect of dry density and shear rate on the shear strength of saturated remolded loess, the consolidated undrained (CU) test was carried out in Yan’an City by using SLB-6A stress-strain controlled triaxial shear permeability test instrument. The shear rate, confining pressure and dry density were controlled during the test. The dry densities of the samples were 1.5 g / cm3, 1.6 g / cm3 and 1.7 g / cm3, respectively. CU tests of saturated remolded loess were carried out at different shear rates under the confining pressures of 100 kPa, 150 kPa and 200 kPa, respectively. It is found that the stress-strain curve of saturated remolded loess gradually moves upward with the increase of dry density. With the increase of dry density, the cohesion and internal friction angle of remolded saturated loess samples increase. At the same shear rate, with the increase of dry density, the deviatoric stress of the specimen increases significantly. Public Library of Science 2022-07-14 /pmc/articles/PMC9282495/ /pubmed/35834541 http://dx.doi.org/10.1371/journal.pone.0271266 Text en © 2022 Lai et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Lai, Jie Liu, Yun Xiang, Yuzhou Wang, Wei Xu, Jiangbo Cao, Baohua Zhao, Danni Wei, Wei Bao, Han Yan, Changgen Lan, Hengxing Experimental study on shear strength of saturated remolded loess |
title | Experimental study on shear strength of saturated remolded loess |
title_full | Experimental study on shear strength of saturated remolded loess |
title_fullStr | Experimental study on shear strength of saturated remolded loess |
title_full_unstemmed | Experimental study on shear strength of saturated remolded loess |
title_short | Experimental study on shear strength of saturated remolded loess |
title_sort | experimental study on shear strength of saturated remolded loess |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9282495/ https://www.ncbi.nlm.nih.gov/pubmed/35834541 http://dx.doi.org/10.1371/journal.pone.0271266 |
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