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Volume 38 Issue z2
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HU Shao-hua, ZHANG Guang, ZHAO Shun-li, JIANG Xiu-ling, CHEN Yi-feng, ZHOU Chuang-bing. Laboratory tests on deformation characteristics of thermally treated Beishan granite under high pore water pressure[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(z2): 330-335. DOI: 10.11779/CJGE2016S2054
Citation: HU Shao-hua, ZHANG Guang, ZHAO Shun-li, JIANG Xiu-ling, CHEN Yi-feng, ZHOU Chuang-bing. Laboratory tests on deformation characteristics of thermally treated Beishan granite under high pore water pressure[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(z2): 330-335. DOI: 10.11779/CJGE2016S2054
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Laboratory tests on deformation characteristics of thermally treated Beishan granite under high pore water pressure

  • 1. School of Resource and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China;
    2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;
    3. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330033, China

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  • Received Date: May 18, 2016
  • Published Date: October 19, 2016
    Graphical Abstract
    • Abstract
  • This study aims to examine the influence of coupled thermo-hydro-mechanical processes on the stress-strain curves, mechanical properties, failure mode and damage evolution process. Using THM coupling system, triaxial compression tests were performed on the thermally-treated Beishan granite under high pore water pressure. The σ1-ε1 curves are basically in coincidence with each other under different pore water pressure in the preexisting micro-crack closure region and the linear elastic region, which gradually start to move towards the ε1 axis as the cracks were initiated and propagated. Moreover, with the increase of pore water pressure, the peak strength and the corresponding axial strain decrease, while the inclination of the shear failure surface increases and the damage process evolves more quickly. It was demonstrated that the influence of pore water pressure on the rock damage and failure is mainly manifested in accelerating the process from crack growth to macro instability.
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    • References (13)
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