A Mohr-Coulomb envelop between shear stress, t and normal stress, σn of a sandstone rock is given as τ=7.5+0.84 σn ( unit of stresses is MPa ) A...

A circular tunnel is constructed at a depth of 100 m. The average unit weight of overburden rock is 27.0 kN/m3. If the tangential stress measured at point A loc...

A shear stress t acts tangentially to the upper surface of a block and causes a small deformation Δw as shown. The shear strain is calculated by