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    Compression and Shear Deformation of Soil Under Wide-Ranging Confining Pressure

    Published: Jan 1988

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    The conventional triaxial drained compression test was conducted on specimens under wide-ranging confining pressure, 9.8 to 9.8 × 103 kN/m2 (0.1 to 100 kgf/cm2). Three kinds of soil were used for the test: clayey soil, Toyoura sand, and soft sedimentary rock (“Shirasu,” derived from pyroclastic flows in the southern part of Kyushu Island in Japan). Confining pressure higher than 9.8 × 102 kN/m2 (10 kgf/cm2) was generated by a nitrogen gas cylinder; confining pressure lower than 9.8 × 102 kN/m2 (10 kgf/cm2) was supplied by a common air compressor. The compression curves (the e-log p relation) under wide-ranging pressure are shown for three kinds of soil. Stress-strain relations and stress-dilatancy relations in the shear deformation process are also shown. It is concluded that the mechanical behaviors of clayey soil and sandy soil are similar under wide-ranging confining pressure although these materials are often treated as different.


    conventional triaxial test, clayey soil, sandy soil, low pressure, high pressure, compression, shear deformation, e, -log , p, relation, stress-strain relation, stress-dilatancy relation

    Author Information:

    Kitamura, R
    Professorprofessor, Kagoshima University, Kagoshima,

    Haruyama, M
    Professorprofessor, Kagoshima University, Kagoshima,

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP29095S

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