Application of suction stress to shear strength in direct shear test for unsaturated soil under low confining pressure

B. S. Kim, S. Shibuya, S. Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effects of matric suction on the shear strength of unsaturated soil have not been fully understood for low stress level. In this study, the relationships among the matric suction, the shear strength and the deformation under low confining pressure were examined by using the modified opening type direct shear apparatus for compacted specimen of weathered granite. The Suction stress-SWCC Method (SSM), which determines the matric suction value for the direct shear test, was proposed to analyze the shear strength behavior for unsaturated state. It was found that the peak shear strength for unsaturated state are arranged uniquely on the same failure line for saturated state when the suction stress is took account as a component of confining pressure.We also found that the shear strengths for unsaturated soil can be estimated by using the shear strength equation applying SSM.

Original languageEnglish
Title of host publicationUnsaturated Soils
Subtitle of host publicationTheoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils
Pages135-140
Number of pages6
Publication statusPublished - Dec 1 2010
Externally publishedYes
Event4th Asia Pacific Conference on Unsaturated Soils - Newcastle, NSW, Australia
Duration: Nov 23 2009Nov 25 2009

Publication series

NameUnsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils

Other

Other4th Asia Pacific Conference on Unsaturated Soils
CountryAustralia
CityNewcastle, NSW
Period11/23/0911/25/09

ASJC Scopus subject areas

  • Soil Science

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  • Cite this

    Kim, B. S., Shibuya, S., & Kato, S. (2010). Application of suction stress to shear strength in direct shear test for unsaturated soil under low confining pressure. In Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils (pp. 135-140). (Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils).