caa a22 4500 463174879 CHVBK 20180406164823.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s00603-006-0109-4 doi (NATIONALLICENCE)springer-10.1007/s00603-006-0109-4 Experimental and Numerical Studies on Rock Breaking with TBM Tools under High Stress Confinement [Elektronische Daten] [N. Innaurato, C. Oggeri, P. P. Oreste, R. Vinai] Summary: The understanding of rock breaking and chipping due to the TBM cutter disks mechanism in deep tunnels is considered in this paper. The interest stems from the use of TBMs for the excavation of long Trans-Alpine tunnels. Some tests that simulate the disk cutter action at the tunnel face by means of an indenter, acting on a rock specimen are proposed. The rock specimen is confined through a flat-jack and a confinement-free area on one side of the specimen simulates the formation of a groove near the indenter, like it occurs in TBM excavation conditions. Results show a limited influence of the confinement stress versus the thrust increment required for breaking the rock between the indenter and the free side of the specimen. Numerical modelling of the cutter disk action on confined material has also been carried out in order to investigate further aspects of the fracture initiation. Also in this case the importance of the relative position between disk cutter and groove is pointed out. Springer-Verlag, 2006 Keywords: Rock, TBM, disk cutter, indenter, tunnel face, confinement nationallicence Innaurato N. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut Oggeri C. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut Oreste P. P. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut Vinai R. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut Rock Mechanics and Rock Engineering Springer-Verlag 40/5(2007-10-01), 429-451 0723-2632 40:5<429 2007 40 603 https://doi.org/10.1007/s00603-006-0109-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00603-006-0109-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Innaurato N. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut NATIONALLICENCE 700 1- Oggeri C. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut NATIONALLICENCE 700 1- Oreste P. P. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut NATIONALLICENCE 700 1- Vinai R. Department of Land, Environmental and Geotechnology Engineering, University of Technology, Torino, Italy aut NATIONALLICENCE 773 0- Rock Mechanics and Rock Engineering Springer-Verlag 40/5(2007-10-01), 429-451 0723-2632 40:5<429 2007 40 603 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer