Compressibility and shear strength of a residual soil |
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| Authors: | Yahia E-A Mohamedzein Mohammed H Aboud |
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| Institution: | (1) Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khod, 123, Sultanate of Oman;(2) Department of Mining and Petroleum Engineering, University of Khartoum, Khartoum, Sudan |
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| Abstract: | A detailed study was performed to investigate the compressibility and the shear strength of a residual soil in Omdurman, Sudan.
The soil resulted from weathering of sandstone and mudstone. The soil is classified as sandy clayey silt (MH-CH) and is generally
partially saturated. Consolidation tests were performed to study the compressibility of the soil and UU, CIU and insitu tests
(CPT and SPT) were performed to study the shear strength characteristics of the soil. The characteristics of this residual
soil can generally be predicted using correlations proposed in the literature for transported soils. The soil is of low to
medium compressibility and exhibits slight apparent overconsolidation behavior. The soil dilates during shear and shows no
long term effective cohesion. Problems associated with open cuts in this soil are attributed to loss of strength upon saturation. |
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| Keywords: | compressibility correlations residual soils shear strength |
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