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Triaxial compression tests with pore water pressure measurements on undisturbed samples of a sensitive marine clay common to Eastern Canada and United States are reported. The stress and pore water pressure at failure depend on rate of strain. It is suggested that a breakdown of soil structure determines the level of pore water pressure. On a Mohr stress diagram it is shown that the failure envelope in terms of effective stresses is dependent on rate of strain application, and the implications associated with this observation are discussed.
Crawford, C. B.
Head, Soil Mechanics Section, National Research Council, Division of Building Research, Ottawa, Ont.