Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope

Slope failures in high plasticity clay deposits are common occurrences in many parts of the world. In western and central Alabama, expansive Prairie clays are commonly found, and shallow slope failures have occurred in both fill and cut slopes containing these high plasticity clays. The objective of...

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Autores principales:	Mengwei Xuan, Jack Montgomery, J. Brian Anderson
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	torsional ring shear high plasticity clay drained shear strength slope stability embankments nonlinear strength envelopes Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/ce6f476312ed4141a7dd997e28142a2b
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spelling	oai:doaj.org-article:ce6f476312ed4141a7dd997e28142a2b2021-11-25T17:42:50ZExamining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope10.3390/geosciences111104492076-3263https://doaj.org/article/ce6f476312ed4141a7dd997e28142a2b2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3263/11/11/449https://doaj.org/toc/2076-3263Slope failures in high plasticity clay deposits are common occurrences in many parts of the world. In western and central Alabama, expansive Prairie clays are commonly found, and shallow slope failures have occurred in both fill and cut slopes containing these high plasticity clays. The objective of this study was to examine the effects of suction and the use of nonlinear strength envelopes on the embankment stability of a section of highway AL-5. The testing program consisted of fifteen ring shear tests performed using a Bromhead Ring Shear Device. The results of the tests were used to develop both linear and nonlinear fully softened and residual strength envelopes. The saturated strength envelopes are then used in a limit equilibrium slope stability analysis with and without the effects of suction. The results show stability (factor of safety >1) for all cases except the residual friction angle without suction. Given these results, large slope failures are unlikely to occur in this area, but surficial failures and deformations due to creep may be possible. These results demonstrate the importance of considering the effects of suction and nonlinear strength envelopes when examining the potential for shallow slope failures in high plasticity clays.Mengwei XuanJack MontgomeryJ. Brian AndersonMDPI AGarticletorsional ring shearhigh plasticity claydrained shear strengthslope stabilityembankmentsnonlinear strength envelopesGeologyQE1-996.5ENGeosciences, Vol 11, Iss 449, p 449 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	torsional ring shear high plasticity clay drained shear strength slope stability embankments nonlinear strength envelopes Geology QE1-996.5
spellingShingle	torsional ring shear high plasticity clay drained shear strength slope stability embankments nonlinear strength envelopes Geology QE1-996.5 Mengwei Xuan Jack Montgomery J. Brian Anderson Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope
description	Slope failures in high plasticity clay deposits are common occurrences in many parts of the world. In western and central Alabama, expansive Prairie clays are commonly found, and shallow slope failures have occurred in both fill and cut slopes containing these high plasticity clays. The objective of this study was to examine the effects of suction and the use of nonlinear strength envelopes on the embankment stability of a section of highway AL-5. The testing program consisted of fifteen ring shear tests performed using a Bromhead Ring Shear Device. The results of the tests were used to develop both linear and nonlinear fully softened and residual strength envelopes. The saturated strength envelopes are then used in a limit equilibrium slope stability analysis with and without the effects of suction. The results show stability (factor of safety >1) for all cases except the residual friction angle without suction. Given these results, large slope failures are unlikely to occur in this area, but surficial failures and deformations due to creep may be possible. These results demonstrate the importance of considering the effects of suction and nonlinear strength envelopes when examining the potential for shallow slope failures in high plasticity clays.
format	article
author	Mengwei Xuan Jack Montgomery J. Brian Anderson
author_facet	Mengwei Xuan Jack Montgomery J. Brian Anderson
author_sort	Mengwei Xuan
title	Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope
title_short	Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope
title_full	Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope
title_fullStr	Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope
title_full_unstemmed	Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope
title_sort	examining the effects of suction and nonlinear strength envelopes on the stability of a high plasticity clay slope
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ce6f476312ed4141a7dd997e28142a2b
work_keys_str_mv	AT mengweixuan examiningtheeffectsofsuctionandnonlinearstrengthenvelopesonthestabilityofahighplasticityclayslope AT jackmontgomery examiningtheeffectsofsuctionandnonlinearstrengthenvelopesonthestabilityofahighplasticityclayslope AT jbriananderson examiningtheeffectsofsuctionandnonlinearstrengthenvelopesonthestabilityofahighplasticityclayslope
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Examining the Effects of Suction and Nonlinear Strength Envelopes on the Stability of a High Plasticity Clay Slope

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