Shear strength automated vane (AVS)

Shear strength was measured on section halves using a GEISA automated vane shear (AVS) frame and device controller. The device is suitable for sediment not affected by cementation (i.e., saturated, clay-rich, soft sediment). Shear strength measurements should be considered only approximate, particularly because the influence of pore pressure changes during the undrained experiment cannot be estimated. Report includes vane shear strength at the sample's failure point, maximum torque angle, penetration direction, and rate of vane rotation.

Data File format

    Exp: expedition number
    Site: site number
    Hole: hole number
    Core: core number
    Type: type indicates the coring tool used to recover the core (typical types are F, H, R, X).
    Sect: section number
    A/W: archive (A) or working (W) section half.
    Offset (cm): position of the observation made, measured relative to the top of the section.
    Depth CSF-A (m): location of the observation expressed relative to the top of a hole.
    Depth [other] (m): location of the observation expressed relative to the top of a hole. The location is presented in a scale selected by the science party or the report user.
    Vane shear strength (kN/m2): vane shear strength from Giesa AVS measurement.
    Max torque angle (deg): angle at which maximum torque was reached.
    Penetration direction: orientation of the experiment orthogonal to the shear experiment plane (usually into the x-axis).
    Vane rotation rate (deg/s): rate of rotation for automated vane measurement.
    Vane ID: identification of the vane used in the experiment.
    Timestamp (UTC): point in time at which the observation or set of observations was made on the logger.
    Instrument: abbreviation or mnemonic for the strength device used to make this observation (GEISA).
    Text ID: automatically generated unique database identifier for a sample, visible on printed labels.
    Test No: unique number associated with the instrument measurement steps that produced these data. 
    Sample comments: observations recorded about the sample itself.
    Test comments: observations about a measurement or the measurement process; some measurement observations may be under Result comments.
    Result comments: observations about a measurement or the measurement process; some measurement observations may be under Test comments.