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The Hvorslev effective components are reviewed, and it is argued that the usual assumption of equal cohesion at equal void ratio can be in error because void ratio is not a sufficient description of soil structure. To avoid this error, and to permit investigating the components as functions of strain, it is necessary to redefine and generalize them. This is done. An experimental procedure, called the IDS test, is described which permits separation of the generalized components in a direct manner from a single specimen. The test is versatile as well as practical. The few available comparisons between the Hvorslev and generalized components are presented and are favorable.
Associate professor of civil engineering, University of Florida, Gainesville, Fla.