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## Angle of friction |

Durgunouglu-Mitchell (1973-1975)

•For non cemented N.C. & S.C. sand.

Meyerhof (1951)

•For N.C. & S.C. sand.

Caquot

•For non cemented N.C. & S.C. sand and for depths > 2 m in saturated soils or > 1 m in non saturated soils.

Koppejan

•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)

•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)

•For non cemented quartzy sand.

Schmertmann (1977-1982)

•Diverse soils (This correlation generally gives an overestimate).

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