Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir

Abstract Estimation of the residual strength of the soil on the landslide sliding surface is essential for analyzing reactivated landslides. This study investigated the influence of over-consolidation ratio (OCR) and shear rate on the residual strength of SM-type (silty sand) landslide soils in the...

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Autores principales:	Deying Li, Kunlong Yin, Thomas Glade, Chin Leo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6105660aa89c4eeab600e7fbdb9984fa
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spelling	oai:doaj.org-article:6105660aa89c4eeab600e7fbdb9984fa2021-12-02T16:07:06ZEffect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir10.1038/s41598-017-05749-42045-2322https://doaj.org/article/6105660aa89c4eeab600e7fbdb9984fa2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05749-4https://doaj.org/toc/2045-2322Abstract Estimation of the residual strength of the soil on the landslide sliding surface is essential for analyzing reactivated landslides. This study investigated the influence of over-consolidation ratio (OCR) and shear rate on the residual strength of SM-type (silty sand) landslide soils in the Three Gorge Reservoir using ring shear tests under drained conditions. A series of ring shear tests were conducted to measure the drained residual strength under over-consolidation ratios of 1–12 and shear rates of 0.06–30.00 mm/min. Test results showed that residual strengths of SM-type landslide soils were not affected significantly by the over-consolidation process. The effect of shear rate on residual strength did not exhibit a regular pattern at shear rates of 0.06–10.00 mm/min, and behaved negatively at a high shear rate of 30 mm/min. The reduction in residual strength at higher shear rates may be attributable to increases in the water content of the shear zone and the amount of finer particles, due to particle breakage and/or larger grains being pushed from the shear zone.Deying LiKunlong YinThomas GladeChin LeoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Deying Li Kunlong Yin Thomas Glade Chin Leo Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir
description	Abstract Estimation of the residual strength of the soil on the landslide sliding surface is essential for analyzing reactivated landslides. This study investigated the influence of over-consolidation ratio (OCR) and shear rate on the residual strength of SM-type (silty sand) landslide soils in the Three Gorge Reservoir using ring shear tests under drained conditions. A series of ring shear tests were conducted to measure the drained residual strength under over-consolidation ratios of 1–12 and shear rates of 0.06–30.00 mm/min. Test results showed that residual strengths of SM-type landslide soils were not affected significantly by the over-consolidation process. The effect of shear rate on residual strength did not exhibit a regular pattern at shear rates of 0.06–10.00 mm/min, and behaved negatively at a high shear rate of 30 mm/min. The reduction in residual strength at higher shear rates may be attributable to increases in the water content of the shear zone and the amount of finer particles, due to particle breakage and/or larger grains being pushed from the shear zone.
format	article
author	Deying Li Kunlong Yin Thomas Glade Chin Leo
author_facet	Deying Li Kunlong Yin Thomas Glade Chin Leo
author_sort	Deying Li
title	Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir
title_short	Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir
title_full	Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir
title_fullStr	Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir
title_full_unstemmed	Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir
title_sort	effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the three gorges reservoir
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/6105660aa89c4eeab600e7fbdb9984fa
work_keys_str_mv	AT deyingli effectofoverconsolidationandshearrateontheresidualstrengthofsoilsofsiltysandinthethreegorgesreservoir AT kunlongyin effectofoverconsolidationandshearrateontheresidualstrengthofsoilsofsiltysandinthethreegorgesreservoir AT thomasglade effectofoverconsolidationandshearrateontheresidualstrengthofsoilsofsiltysandinthethreegorgesreservoir AT chinleo effectofoverconsolidationandshearrateontheresidualstrengthofsoilsofsiltysandinthethreegorgesreservoir
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Effect of over-consolidation and shear rate on the residual strength of soils of silty sand in the Three Gorges Reservoir

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