Abstract
It is well-known that shear strength of rock mass is strongly affected by shear strength of rock joint. In this study, direct shearing tests of artifitial joints, which had been presented with referring the actual joint surface roughness, have been carried out, before and after grouting, in order to examine grouting effects on shear strength of joint. The test results showed that the cohesion of joint can be improved by grouting, but the friction angle can not. The roll of the initial cohesion of joint is also auged.
