STP1014: Comparison of Field Vane, CPT, and Laboratory Strength Data at Santa Barbara Channel Site

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

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

    Pages: 12    Published: Jan 1988


    Abstract

    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.

    Keywords:

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


    Paper ID: STP10338S

    Committee/Subcommittee: D18.07

    DOI: 10.1520/STP10338S


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