Journal Published Online: 16 May 2018
Volume 41, Issue 4

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

CODEN: GTJODJ

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, Kingdom of Saudi Arabia
Rached, R. M.
4700 King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia
Santamarina, J. C.
4700 King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia
Pages: 9
Price: $25.00
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Details
Stock #: GTJ20170144
ISSN: 0149-6115
DOI: 10.1520/GTJ20170144