Prof. Dr. Mustafa Aytekin

SHEAR STRENGTH OF SOILS

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Shear strength of soil Soil cannot resist tension Soil can resist compression. For excessive compression failure occurs in the form

of shearing along the internal surface within the soil Structural Strength of soil = f ( soils shear strength) Shear Strength Soils ability to resist sliding Important for foundation design Lateral earth pressure calculations Slope stability analysis

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Shear Failures

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Typical Values of Drained Angle of Friction for Sands and Silts

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Lab methods of investigating shear strength

Unconfined compression test (for cohesive soil)

Direct shear testTriaxial compression testVane test (for soft clay)

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THE END

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