Anisotropic Shear Strength of Artificially Fractured Rock Joints Under Low Normal Stress

낮은 수직응력 하에서 인공 절리면의 전단 이방성에 관한 연구

  • 곽정열 (㈜태조엔지니어링) ;
  • 이상은 (만영엔지니어링) ;
  • 임한욱 (강원대 지구 환경공학부)
  • Published : 2003.06.01

Abstract

Anisotropic shear strength of rock joints is studied based on the artificially fractured specimens using experimental and analytical methods. Series of direct shear tests are performed to obtain the strength, stiffness and friction angle of joints under various low normal stresses and shearing directions. The results of shear strength and stiffness show anisotropic value according to shearing direction under low normal stress specially less than 2.45 MPa. But, the effect of joint roughness on strength decreases with increasing normal stress. To estimate more effectively the peak shear strength under low normal stress, the modified Barton's equation is suggested.

Keywords

Anisotropic shear strength;Artificially fractured joint;Low normal stress;Modified Barton′s equation

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