STP977: Triaxial Relaxation Tests on a Soft Clay

    Silvestri, V
    Professor, professor, and graduate research assistant, Civil Engineering Department, École Polytechnique, Montreal, Quebec

    Soulié, M
    Professor, professor, and graduate research assistant, Civil Engineering Department, École Polytechnique, Montreal, Quebec

    Touchan, Z
    Professor, professor, and graduate research assistant, Civil Engineering Department, École Polytechnique, Montreal, Quebec

    Fay, B
    Chief, Soil Mechanics Laboratories, École Polytechnique, Montreal, Quebec

    Pages: 17    Published: Jan 1988


    Abstract

    Results of consolidated undrained triaxial relaxation tests on a soft sensitive clay of eastern Canada are presented and discussed. The initial consolidation phases of the traxial tests are carried out under both isotropic and anisotropic stress conditions.

    The results show that pore water pressures remain approximately constant during the relaxation phases of the tests. The phenomenological model developed by Prevost (Journal of the Geotechnical Engineering Division, ASCE, Vol. 102, No. GT12, 1976, pp. 1245–1259) describes the observed response quite well. In addition, because the clay possesses a well-defined volumetric yield curve, the position of this curve should be taken into account when analyzing the resuls. Finally, triaxial test procedure and equipment modifications used in the laboratory investigation are fully described.

    Keywords:

    triaxial tests, relaxation, undrained, sensitive clay, phenomenological model


    Paper ID: STP29084S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP29084S


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