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The Influence of Rock Joint Roughness and Normal Stress on Shear Behaviour  

Lee, Myoung-Ho ((주)진산이엔지)
Kim, Jong-Woo (청주대학교 토목환경공학과)
Chang, Kwang-Taek (청주대학교 토목환경공학과)
Publication Information
Tunnel and Underground Space / v.17, no.3, 2007 , pp. 186-196 More about this Journal
Abstract
In this study, direct shear tests were carried out on the 30 rock joint samples in order to investigate the influence of roughness and normal stress on the shear behaviour. Joint roughness profiles were measured by use of 3D laser profiler, and then the samples were equally classified into three individual groups according to the roughness index of rock joints. Peak shear strength, residual shear strength, shear stiffness, dilation angle of rock joints were investigated in condition of five different constant normal load. Peak shear strength was increased as roughness index was increased, and the influence of roughness on strength was found to be more considerable in case of lower normal stress condition. Residual shear strength and shear stiffness were increased as roughness index and normal stress were increased. Finally dilation angle was decreased as normal stress was increased, but it was increased as roughness index was increased in the same normal stress condition.
Keywords
Rock Joint; Roughness; Normal stress; Shear behaviour; Direct shear test;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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