Unsaturated shear strength behaviour under unconsolidated undrained tests

Unsaturated shear strength behaviour under unconsolidated undrained tests

Residual soils cover more than three-quarts of the land area of Peninsular Malaysia. Many steep slopes in these residual soils often have a deep ground water table. Above those ground water tables, the soils are in unsaturated conditions. In this study, unsaturated shear strength behavior of a tropi...

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Main Author: Sokhanvar, Majid
Format: Thesis
Language:English
Published: 2013
Subjects:
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Online Access:http://eprints.utm.my/id/eprint/33303/1/MajidSokhanvarMFKA2012.pdf
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spelling my-utm-ep.333032021-05-10T12:03:47Z Unsaturated shear strength behaviour under unconsolidated undrained tests 2013 Sokhanvar, Majid Unspecified Residual soils cover more than three-quarts of the land area of Peninsular Malaysia. Many steep slopes in these residual soils often have a deep ground water table. Above those ground water tables, the soils are in unsaturated conditions. In this study, unsaturated shear strength behavior of a tropical residual soil under different stress levels is investigated by using uncomplicated testing procedure. Existing triaxial tests use translation technique for determining unsaturated shear strength parameters but ordinary Unconsolidated Undrained triaxial tests were carried out due to lacking of the advanced testing unit in the laboratory. The Unconsolidated Undrained tests were carried out under different cell pressures at different suctions values to obtain the undrained compressive strengths of the specimens. Preliminary results of the consolidated isotropic undrained tests, show effective cohesion and effective angle of friction i.e., saturated shear strength parameters were 9 kPa and 23°, respectively. In Unconsolidated Undrained tests, the values of apparent shear strength at high stress levels range from 66.1 - 72.6 kPa. At low stress levels, the range of apparent shear strength values was obtained in between 53.1 - 57.5 kPa. The value of friction angle for the highest suction pressure tested in this study (300 kPa) was determined 9.9°. This study illustrated that there is nonlinear relationship between the apparent shear strength and suction. 2013 Thesis http://eprints.utm.my/id/eprint/33303/ http://eprints.utm.my/id/eprint/33303/1/MajidSokhanvarMFKA2012.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:70355?queryType=vitalDismax&query=Unsaturated+shear+strength+behaviour+under+unconsolidated+undrained+tests&public=true masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic Unspecified
spellingShingle Unspecified
Sokhanvar, Majid
Unsaturated shear strength behaviour under unconsolidated undrained tests
description Residual soils cover more than three-quarts of the land area of Peninsular Malaysia. Many steep slopes in these residual soils often have a deep ground water table. Above those ground water tables, the soils are in unsaturated conditions. In this study, unsaturated shear strength behavior of a tropical residual soil under different stress levels is investigated by using uncomplicated testing procedure. Existing triaxial tests use translation technique for determining unsaturated shear strength parameters but ordinary Unconsolidated Undrained triaxial tests were carried out due to lacking of the advanced testing unit in the laboratory. The Unconsolidated Undrained tests were carried out under different cell pressures at different suctions values to obtain the undrained compressive strengths of the specimens. Preliminary results of the consolidated isotropic undrained tests, show effective cohesion and effective angle of friction i.e., saturated shear strength parameters were 9 kPa and 23°, respectively. In Unconsolidated Undrained tests, the values of apparent shear strength at high stress levels range from 66.1 - 72.6 kPa. At low stress levels, the range of apparent shear strength values was obtained in between 53.1 - 57.5 kPa. The value of friction angle for the highest suction pressure tested in this study (300 kPa) was determined 9.9°. This study illustrated that there is nonlinear relationship between the apparent shear strength and suction.
format Thesis
qualification_level Master's degree
author Sokhanvar, Majid
author_facet Sokhanvar, Majid
author_sort Sokhanvar, Majid
title Unsaturated shear strength behaviour under unconsolidated undrained tests
title_short Unsaturated shear strength behaviour under unconsolidated undrained tests
title_full Unsaturated shear strength behaviour under unconsolidated undrained tests
title_fullStr Unsaturated shear strength behaviour under unconsolidated undrained tests
title_full_unstemmed Unsaturated shear strength behaviour under unconsolidated undrained tests
title_sort unsaturated shear strength behaviour under unconsolidated undrained tests
granting_institution Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department Faculty of Civil Engineering
publishDate 2013
url http://eprints.utm.my/id/eprint/33303/1/MajidSokhanvarMFKA2012.pdf
_version_ 1747816128888963072

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