Authors: Younis Alshkane1
1Department of Civil Engineering, University of Sulaimani, Iraq
Abstract: The Uniaxial Compressive Strength (UCS) and deformability of jointed rock are required to design structures on or in jointed rock mass. These rock masses depend on the number and orientation of joints. In this study, horizontal smooth joints were created in intact sandstone samples by cutting and grinding the end surfaces of sandstone samples collected from Birchover Quarry in the UK. In the study, 15 UCS tests on jointed and intact samples were conducted. The results showed that, although uniform sandstone block was used, there were inconsistencies in values of UCS and modulus of elasticity for the same type of tested rock. Also, the results showed that the UCS and modulus of elasticity decreased with increasing number of horizontal joints to 4 joints except for the sample of 3 joints which showed the increase in UCS and modulus of elasticity.
Keywords: Jointed Rock, UCS, Modulus of Elasticity, Horizontal Smooth Joint
Download the PDF Document from here.
Arora, V. K. (1987). Strength and deformational behaviour of jointed rocks. PhD thesis, IIT Delhi,
Ramamurthy, T., & Arora, V. K. (1994). Strength prediction for jointed rocks in confined and
unconfined states. Int J Rock Mech Min ScGeomechAbstr, 31(1), 9–22.
Nasseri, M. H. B., & Rao, K. S., & Ramamurthy, T. (2003). Anisotropic strength and deformational
behavior of Himalayan schists. International Journal of Rock Mechanics and Mining
Sciences, 40(1), 3-23.
Roy, N. (1993). Engineering behaviourof rock masses through study of jointed models. Ph.D. thesis,
Indian Institute of Technology, Delhi, India.
Brown, E.T. (1970). Strength of models of rock with intermitent joints. JASCE, 96(SM6)1935–49.
Brown, E.T., & Trollope, D.H. (1970). Strength of model of jointed rock. JASCE, 96(SM2), 685–
Einstein, H.H., & Hirschfeld, R.C. (1973). Model studies in mechanics of jointed rocks. JASCE, 99,
Roy, N., Ramamurthy, T.,& Kate, J.M. (1995). An Experimental study of engineering behaviour of
jointed mass in uniaxial compression. Proceedings of the Indian Geotechnical Conference,
Trivedi, A. (2010). Strength and dilatancy of jointed rocks with granular fill. ActaGeotechnica 5(1),
ISRM. (1981). Rock Characterization, Testing and Monitoring. ISRM Suggested Methods. Pergamon