Shear strength parameters of unsaturated residual soils

The shear strength envelope for unsaturated soil requires that three shear strength parameters be defined namely, c', ø' and øb. These parameters can be measured in the laboratory. The c' and ø' parameters can be measured using standard laboratory equipment on saturated soil s...

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Main Authors:	Bujang B.K. Huat, Faisal Hj. Ali, Affendi Abdullah, Saravanan Mariappan, Soenita Hashim
Format:	Article
Published:	2005
Online Access:	http://journalarticle.ukm.my/1437/ http://journalarticle.ukm.my/1437/

id	ukm-1437
recordtype	eprints
spelling	ukm-14372011-10-11T03:45:30Z http://journalarticle.ukm.my/1437/ Shear strength parameters of unsaturated residual soils Bujang B.K. Huat, Faisal Hj. Ali, Affendi Abdullah, Saravanan Mariappan, Soenita Hashim, The shear strength envelope for unsaturated soil requires that three shear strength parameters be defined namely, c', ø' and øb. These parameters can be measured in the laboratory. The c' and ø' parameters can be measured using standard laboratory equipment on saturated soil specimen. However conventional triaxial and direct shear equipment require modifications prior to their use, i.e. for suction induced tests on unsaturated soils to measure the øb (i.e. the change in shear strength with respect to suction). This paper describes the modification made to the standard laboratory triaxial and shear box and outline the test performed for measuring the shear strength parameters of unsaturated residual soils. The value cohesion, c' is found to increase with increase in the matric suction. For a given level of matric suction, the cohesion appear to increase with increase in the soil weathering grade, i.e as the soils/rocks becomes more weathered. The angle of friction, ø' decreases with increase in the soils weathering grade, but the angle of friction or change in shear strength with change in suction, øb , increases when the soil becomes more weathered. The values of øb are generally lower than ø' 2005 Article PeerReviewed Bujang B.K. Huat, and Faisal Hj. Ali, and Affendi Abdullah, and Saravanan Mariappan, and Soenita Hashim, (2005) Shear strength parameters of unsaturated residual soils. Jurnal Kejuruteraan, 17 . http://www.ukm.my/jkukm/index.php/jkukm
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
description	The shear strength envelope for unsaturated soil requires that three shear strength parameters be defined namely, c', ø' and øb. These parameters can be measured in the laboratory. The c' and ø' parameters can be measured using standard laboratory equipment on saturated soil specimen. However conventional triaxial and direct shear equipment require modifications prior to their use, i.e. for suction induced tests on unsaturated soils to measure the øb (i.e. the change in shear strength with respect to suction). This paper describes the modification made to the standard laboratory triaxial and shear box and outline the test performed for measuring the shear strength parameters of unsaturated residual soils. The value cohesion, c' is found to increase with increase in the matric suction. For a given level of matric suction, the cohesion appear to increase with increase in the soil weathering grade, i.e as the soils/rocks becomes more weathered. The angle of friction, ø' decreases with increase in the soils weathering grade, but the angle of friction or change in shear strength with change in suction, øb , increases when the soil becomes more weathered. The values of øb are generally lower than ø'
format	Article
author	Bujang B.K. Huat, Faisal Hj. Ali, Affendi Abdullah, Saravanan Mariappan, Soenita Hashim,
spellingShingle	Bujang B.K. Huat, Faisal Hj. Ali, Affendi Abdullah, Saravanan Mariappan, Soenita Hashim, Shear strength parameters of unsaturated residual soils
author_facet	Bujang B.K. Huat, Faisal Hj. Ali, Affendi Abdullah, Saravanan Mariappan, Soenita Hashim,
author_sort	Bujang B.K. Huat,
title	Shear strength parameters of unsaturated residual soils
title_short	Shear strength parameters of unsaturated residual soils
title_full	Shear strength parameters of unsaturated residual soils
title_fullStr	Shear strength parameters of unsaturated residual soils
title_full_unstemmed	Shear strength parameters of unsaturated residual soils
title_sort	shear strength parameters of unsaturated residual soils
publishDate	2005
url	http://journalarticle.ukm.my/1437/ http://journalarticle.ukm.my/1437/
first_indexed	2023-09-18T19:33:20Z
last_indexed	2023-09-18T19:33:20Z
_version_	1777405107442286592

Shear strength parameters of unsaturated residual soils

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