STP361: The Strength of “Undisturbed” Clay Determined from Undrained Tests

    Ladd, CC
    Assistant professor and professor and head of soil mechanics division, Massachusetts Institute of Technology, Cambridge, Mass.

    Lambe, TW
    Assistant professor and professor and head of soil mechanics division, Massachusetts Institute of Technology, Cambridge, Mass.

    Pages: 30    Published: Jan 1964


    Abstract

    Test data from unconsolidated-undrained (UU) and consolidated-undrained (CU) tests on tube samples of several saturated clays are compared, and the generally large discrepancies in undrained shear strength, Su, are analyzed in terms of changes in effective stress during the sampling process. Data are presented to show that the residual effective stress of laboratory specimens of normally consolidated clay is typically less than one third of the value corresponding to perfect sampling, where only the in situ shear stresses are released.


    Paper ID: STP30011S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP30011S


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