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    Volume 41, Issue 4 (July 2018)

    Large-Scale True Triaxial Apparatus for Geophysical Studies in Fractured Rock

    (Received 25 April 2017; accepted 1 November 2017)

    Published Online: 2018

    CODEN: GTJODJ

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    Abstract

    The study of fractured rock masses in the laboratory remains challenging because of the large specimen sizes and bulky loading systems that are required. This article presents the design, structural analysis, and operation of a compact and self-reacting true triaxial device for fractured rock. The frame subjects a 50 cm by 50 cm by 50 cm fractured rock specimen to a maximum stress of 3 MPa along three independent axes. Concurrent measurements include long-wavelength P-wave propagation, passive acoustic emission monitoring, deformations, and thermal measurements. The device can accommodate diverse research, from rock mass properties and geophysical fractured rock characterizations, to coupled hydro-chemo-thermo-mechanical processes, drilling, and grouting. Preliminary wave propagation data gathered under isotropic and anisotropic stress conditions for an assembly of 4,000 rock blocks demonstrate the system’s versatility and provide unprecedented information related to long-wavelength propagation in fractured rock under various stress anisotropies.

    Author Information:

    Garcia, A. V.
    4700 King Abdullah University of Science and Technology (KAUST), Thuwal,

    Rached, R. M.
    4700 King Abdullah University of Science and Technology (KAUST), Thuwal,

    Santamarina, J. C.
    4700 King Abdullah University of Science and Technology (KAUST), Thuwal,


    Stock #: GTJ20170144

    ISSN:0149-6115

    DOI: 10.1520/GTJ20170144

    Author
    Title Large-Scale True Triaxial Apparatus for Geophysical Studies in Fractured Rock
    Symposium ,
    Committee D18