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    Results and Interpretation of Multistage Triaxial Compression Tests

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    The procedure for performing and interpreting multistage triaxial compression tests is described. The results obtained from unconsolidated undrained and isotropically con-solidated undrained tests on normally consolidated alluvial clay and overconsolidated colluvial gravelly clay are presented.

    A direct comparison of the results of single stage and multistage compression tests, performed on homogeneous samples, indicates that the latter procedure may be applied to soil specimens that reach failure with vertical strain greater than 8 to 10%.

    To demonstrate the similarity between the two procedures and to interpret the tests when only a limited percentage of strain is available for each compression stage, stress versus strain, normalized stress versus strain, normalized tangent modulus versus stress, and Kondner's hyperbolic criterion were used in the analysis.


    soil mechanics, triaxial test, compression, shear strength, stress-strain behavior, cohesive soils

    Author Information:

    Soranzo, M
    Senior research engineer, University of Padova, Padova,

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP29086S