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A Study on Shear Characteristics of a Rock Discontinuity under Various Thermal, Hydraulic and Mechanical Conditions
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  • Journal title : Tunnel and Underground Space
  • Volume 26, Issue 2,  2016, pp.68-86
  • Publisher : Korean Society for Rock Mechanics
  • DOI : 10.7474/TUS.2016.26.2.068
 Title & Authors
A Study on Shear Characteristics of a Rock Discontinuity under Various Thermal, Hydraulic and Mechanical Conditions
Kim, Taehyun; Jeon, Seokwon;
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 Abstract
Understanding the frictional properties of rock discontinuities is crucial to ensure the stability of underground structures. In particular, the frictional behavior at depth depends on the complex interaction among mechanical, hydraulic, thermal and chemical characteristics and their coupled effects. In this study, a series of shear tests were carried out in a triaxial compression chamber to investigate the shearing behavior of saw-cut granite surface and rough shear surface of synthetic rocks. The test results were analyzed using Coulomb's shear strength criterion. The frictional behavior of saw-cut granite surface showed little variation at different confining, water pressures and temperature conditions, however in case of synthetic rocks, the frictional behavior showed different trend depending on normal stress level. In addition, the variation of stiffness and dilation at different testing conditions were analyzed, and the stiffness and dilation showed little variation at different water pressures and temperature conditions.
 Keywords
Friction angle;Cohesive strength;Shear test;T-H-M coupled process;Triaxial compression chamber;
 Language
Korean
 Cited by
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