Question Barton's empirical equation for the shear strength, tp of a roug JCS Tp = 0₂ tan + JRC Log10 tan o P Where on i

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Question Barton S Empirical Equation For The Shear Strength Tp Of A Roug Jcs Tp 0 Tan Jrc Log10 Tan O P Where On I 1 (134.24 KiB) Viewed 21 times

Question Barton's empirical equation for the shear strength, tp of a roug JCS Tp = 0₂ tan + JRC Log10 tan o P Where on is the effective normal stress ob is the basic friction angle of a smooth joint surface JRC is the Joint Roughness Coefficient in the range 0 to 20 JCS is the uniaxial compressive strength of the joint wall mate (a) A shear test on a smooth joint surface of sandstone at an ei 0.8 MPa gave a shear strength of 0.47 MPa. Calculate the basi material. (10 marks) (b) A shear test on a fresh rough joint surface in the same san normal stress of 0.8 MPa gave a shear strength of 0.75 MPa. 1 material gave a uniaxial compressive strength of 35 MPa. Cal Coefficient for this joint. What are the units of JRC? (15 mar (c) By graphical or other means, calculate the Coulomb shear cohesion and angle of friction that are equivalent to the Barton this fresh rough joint surface over the effective normal stress r marks)