Undrained cohesion

Benassi & Vannelli - Cu

•	correlations derived by the penetrometer construction company SUNDA 1983.

Sanglerat - Cu

•	from CPT (Cone Penetration Test) data for saturated cohesive soils.

•	these correlations are not valid for sensitive clays whose sensitivity is > 5 nor over consolidated or fissured clays or low plasticity silts.

Sanglerat - Cu

•	for silty-sandy clays of low cohesiveness

•	values valid for penetrometric resistance < 10 blows

•	for higher resistance Sanglerat’s correlation for plastic clays is indicated

(U.S.D.M.S.M.) U.S. Design Manual Soil Mechanics undrained cohesion - Cu

•	valid for silty clay and clay of low, medium or high plasticity, (Cu-Nspt-degree of plasticity).

Schmertmann (1975) - Cu - (average values)

•	valid for clays and clayey silts of Nc=20 and Qc/Nspt=2

Schmertmann (1975) - Cu

•	valid for clays NC .

Fletcher (1965) (Chicago clay)

•	valid for clay of low or medium plasticity

Houston (1960)

•	clay of medium-high plasticity

Shioi-Fukuni (1982)

•	valid for soils inconsistent and plastic clay of medium to high plasticity

Begemann

De Beer