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P. V Marinos, G. Tsiambaos
P. V Marinos, G. Tsiambaos


The paper deals with the evaluation of strength and deformability of sedimentary rocks and ophiolites based on the processing of laboratory testing results. Characteristic values and their typical range for the parameters σci, Ei , as well as the Modulus Ratio (MR) are presented. These parameters are significant for the estimation of the strength and deformability of the rock mass since σci is basic component for the solution of Hoek-Brown failure criterion and Ei and MR are important components of the latest rock mass deformability expression (Hoek-Diedrichs, 2006). The recent site investigation and laboratory work undergone for the design of numerous tunnels in the Greek territory provided very good and sufficient data, derived from a specifically established database, for the estimation of strength and deformability of specific rocks. These rocks are sandstones and siltstones of flysch and molassic formations, as well as limestones and ophiolites.


rock strength; deformability; Modulus Ratio (MR); sedimentary rocks,ophiolite;

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Deere, D.U., 1964. Technical description of rock cores for engineering purposes. Rock Mechanics and Engineering

Geology, 1(1), pp. 17-22.

Hoek, E., Diederichs, M.S., 2006. Empirical estimation of rock mass modulus. International Journal of

Rock Mechanics and Mining Sciences, 43, pp. 203-215.

Hoek, E., Carranza-Torres, C., Corkum, B., 2002. Hoek - Brown failure criterion - 2002 edition. In: Bawden

H.R.W., Curran, J., Telesnicki, M. (eds). Proceedings of NARMS-TAC 2002, Toronto, pp. 267-

Marinos, P., Hoek, E., Marinos, V., 2005. Variability of the engineering properties of rock masses quantified

by the geological strength index: the case of ophiolites with special emphasis on tunnelling. Bulletin

of Engineering Geology and the Environment, 65(2), pp. 129-142.

Marinos P. V., 2007. “Geotechnical classification and engineering geological behaviour of weak and complex

rock masses in tunneling”, Doctoral thesis, School of Civil Engineering, Geotechnical Engi-

XLIII, No 3 – 1266

neering Department, National Technical University of Athens (NTUA), Athens, July (in greek).

Palmstrom, A., Singh, R., 2001. The deformation modulus of rock masses: comparisons between in situ

tests and indirect estimates. Tunnelling and Underground Space Technology, 16, pp. 115-131.

Ramamurthy T., 2004. A geo-engineering classification for rocks and rock masses. Int J Rock Mech Min

Sci 41:89–101.

Sabatakakis, N., Koukis, G., Tsiambaos, G., Papanakli, S., 2008. “Index properties and strength variation

controlled by microstructure for sedimentary rocks”, Εngineering Geology, Elsevier, 97, 80-90.

Sonmez H, Gokc¸eoglu C, Ulusay R., 2004. Indirect determination of the modulus of deformation of

rock masses based on the GSI system. Int J Rock Mech Min Sci 41(5):849–857.

Tziallas, G.P., Tsiambaos, G., Saroglou, H., 2009. “Determination of rock strength and deformability of

intact rocks”, Electronic Journal of Geotechnical Engineering, 14 G, 1-12.

Zhang L, Einstein HH., 2004. Using RQD to estimate the deformation modulus of rock masses. Int J

Rock Mech Min Sci 41(2):337–341.


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