Published: Ιαν 1, 2010
rock mass classification tunnelling weak rock mass failure type
P. V Marinos
The paper deals with the engineering geological behaviour of rock masses in underground excavations. In general, the application of the well-known classification systems has the drawback of not displaying necessary information concerning the behaviour of rock masses, especially the weak ones, in tunnelling. Consequently, there are many cases in which the geological “identity” of the geomaterial is lost since it is not involved in the analysis. In that way it is possible that its special characteristics are mislaid. Within this framework, a system for assessing the failure type mechanisms of the rockmass (i.e. deformation due to overstressing, overbrakes or wedge failure, “chimney” type failure, ravelling ground) for unsupported tunnel-section is presented. These parameters, used for this system, are the structure of the rockmass, the intact rock strength and the overburden thickness. The experience gained by the recent tunnelling construction in the Greek territory, under particularly difficult geological conditions, provided excellent and numerous data for this study.
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  • Engineering Geology and Geotechnical Engineering
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Goricki, W., Schubert, G., Riedmueller, G., 2004. New Developments for the design and construction of
tunnels in complex rock masses. International Journal of Rock Mechanics and Mining Sciences, 41(3),
Hoek, E., Marinos, P., 2000. Predicting tunnel squeezing in weak heterogeneous masses. Tunnels and Tunnelling
International, Part 1—November Issue 2000, pp. 45-51; Part 2—December 2000, pp. 34-36.
Marinos, V., Korkaris, K., Prountzopoulos, G., Romosiou A, Fortsakis, P., Mirmiris, K., Petroutsatou, K.,
Koumoutsakos, D., Kiamos, K., Lazaridou, S., Pitsas, G., Rigopoulou, M., Marinos, P., Lampropoulos,
S., 2006. The construction of a geotechnical database for the Egnatia Highway S.A. Proceedings
of the 5th Hellenic Geotechnical, Xanthi 2006, 3, pp. 525-531. (in Greek).
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 Engineering
Department, National Technical University of Athens (NTUA), Athens, July (in greek).
Palmstrom, A., Stille, H., 2007. Ground behaviour and rock engineering tools for underground excavations.
Tunnelling and Underground Space Technology, 27, pp. 363-376.
Poschl, I., Kleberger, J., 2004. Geotechnical risks in rock mass characterisation - Part 1. Tunnels and Tunnelling
International, May issue, pp. 37-39. Part 2., October issue, pp. 36-38.
Potsch, M., Schubert, W., Goricki, A., Steidl, A., 2004. Determination of Rock Mass Behaviour Types -
a Case Study. EUROCK 2004 and 53th Geomechanics Colloquium, Schubert ed., VGE publ.
Schubert, W., 2004. Basics and Application of the Austrian Guideline for the Geomechanical Design of Underground
Structures. EUROCK 2004 and 53th Geomechanics Colloquium, Schubert ed., VGE publ.
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