Comparison of Field Vane, CPT, and Laboratory Strength Data at Santa Barbara Channel Site

    Published: Jan 1988

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    A comprehensive geotechnical study was performed at a site in the Santa Barbara Channel, CA, where soils are predominately slightly overconsolidated Pleistocene clays. Undrained shear strength data at the site were acquired by (1) in-situ vane testing; (2) in-situ static cone penetration testing; (3) conventional laboratory testing consisting of unconsolidated, undrained triaxial compression and miniature vane; and (4) SHANSEP testing. The conventional laboratory and stress history and normalized soil engineering properties (SHANSEP) testing were performed on samples recovered by pushing 76-mm outside diameter (OD) thin-walled tubes. This paper compares, in detail, strength data obtained by the different testing procedures (in-situ tests and laboratory tests) and recommends the procedures that yield consistent and reliable undrained strength data for offshore foundation design.


    soil investigation, soil properties, field tests, overburden, overconsolidation, preconsolidation pressure, shear strength, cohesive soils, vane shear tests, soil tests

    Author Information:

    Quiros, GW
    Senior geotechnical engineer and vice-president, Fugro-McClelland, Houston, TX

    Young, AG
    Senior geotechnical engineer and vice-president, Fugro-McClelland, Houston, TX

    Committee/Subcommittee: D18.07

    DOI: 10.1520/STP10338S

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