Angle of friction¶
Durgunouglu-Mitchell (1973-1975)
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For non cemented N.C. & S.C. sand. Meyerhof (1951)
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For N.C. & S.C. sand. Caquot
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For non cemented N.C. & S.C. sand and for depths > 2 m in saturated soils or > 1 m in non saturated soils. Koppejan
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For non cemented N.C. & S.C. sand. and for depths > 2 m in saturated soils or > 1 m in non saturated soils. De Beer (1965-1967)
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For non cemented N.C. & S.C. sand. and for depths > 2 m in saturated soils or > 1 m in non saturated soils. Robertson & Campanella (1983)
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For non cemented quartzy sand. Schmertmann (1977-1982)
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Diverse soils (This correlation generally gives an overestimate).