Cam-Clay Predications of Undrained Strength

by Paul W. Mayne, (A.M.ASCE), Geotechnical Engr.; Law Engineering Testing Co., Washington, D.C.,


Serial Information: Journal of the Geotechnical Engineering Division, 1980, Vol. 106, Issue 11, Pg. 1219-1242


Document Type: Journal Paper

Discussion: Anderson Thomas C. (See full record)
Discussion: Koutsoftas Demetrious C. (See full record)
Discussion: Costa-Filno J. A. (See full record)
Closure: (See full record)

Abstract: The validity of the critical-state Cam-Clay theory to predict undrained shear strength is substantiated with data from 96 different clay and silt soils reported in the geotechnical literature. The study investigates normally-consolidated and overconsolidated strengths, which is important in that a range of strengths is more common in natural soil deposits. Attention is given to establishing the critical-state pore pressure parameter from routine consolidated-undrained shear tests. The critical-state theory is shown to be an effective stress method that incorporates total stress approaches similar to SHANSEP.

Subject Headings: Soil strength | Clays | Shear strength | Shear tests | Effective stress | Silt | Overconsolidated soils

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