A Miniature Falling Weight Device for Non-Intrusive Characterization of Soils in the Centrifuge

    Volume 32, Issue 5 (September 2009)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 24 July 2009

    Page Count: 10


    Murillo, Carol
    Researcher, Dept. of Civil and Environmental Engineering, Univ. of los Andes, Bogota,

    Caicedo, Bernardo
    Professor, Dept. of Civil and Environmental Engineering, Univ. of los Andes, Bogota,

    Thorel, Luc
    Researcher, Centrifuge and Soil Mechanics Unit, Laboratoire Central des Ponts et Chaussées, Bouguenais,

    (Received 5 November 2008; accepted 25 June 2009)

    Abstract

    Non-intrusive and non-destructive techniques are used for characterizing multilayer soil models in the centrifuge. Based on the spectral analysis surface waves analysis, a miniature falling weight-type (FW) device is developed for centrifuge testing. A description of the mini-FW with application to characterize homogeneous and bilayer models is presented. The mini-FW principle consists of the fall in a steel ball generating vibrations within the centrifuged models. These vibrations are recorded by accelerometers placed on the model’s surface. On condition that the vibrations remain within the first five upper centimeters in order to avoid near-field effects, the results obtained for both wave velocity values and location of the layer interfaces agree satisfactorily with already available data.


    Paper ID: GTJ102217

    DOI: 10.1520/GTJ102217

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    Author
    Title A Miniature Falling Weight Device for Non-Intrusive Characterization of Soils in the Centrifuge
    Symposium , 0000-00-00
    Committee D18