caa a22 4500 463174739 CHVBK 20180406164822.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00603-006-0125-4 doi (NATIONALLICENCE)springer-10.1007/s00603-006-0125-4 A Combined Three-Dimensional Geological-Geostatistical-Numerical Model of Underground Excavations in Rock [Elektronische Daten] [M. Stavropoulou, G. Exadaktylos, G. Saratsis] Summary.: This paper exploits geological and borehole geotechnical data obtained in the exploratory phase of a tunneling project to investigate in a first place if the kriging interpolation scheme may effectively reproduce the spatial variability of rock mass quality (Rock Mass Rating, RMR) in the vicinity of tunnels. For this purpose a quick solver in Fortran has been developed that performs variography analysis of 3D spatial data, fast kriging estimations of RMR between borehole sampling locations at the centroids of the elements of the numerical model, and model validation. For the purpose of an integrated underground excavation design, a step further is made by incorporating into the 3D mechanical numerical model of the rock mass, the three-dimensional (3D) solid geological model, thus coupling the geology with the ground (geotechnical) model (i.e. each element of the numerical model is assigned a geological material). The mechanical properties of each finite difference cell (or Representative Elementary Volume) of the ground model were then prescribed according to its geological type, the spatial heterogeneity of the rock mass expressed quantitatively with the kriging model, and the upscaling calculations of the mechanical properties of the intact rocks determined in the laboratory, based on the size-effect (strength dependence on size) and Damage Theory. Furthermore, a preliminary numerical simulation of the advance of unsupported tunnels in the model of the heterogeneous rock mass was performed for illustration purposes. Springer-Verlag, 2007 Keywords: Geostatistics, kriging, tunneling, numerical modeling, rock mass heterogeneity, damage, size effect, RMR nationallicence Stavropoulou M. Department of Dynamic, Tectonic and Applied Geology, Faculty of Geology and Geoenvironment, University of Athens, Greece aut Exadaktylos G. Department of Mineral Resources Engineering, Technical University of Crete, Chania, Greece aut Saratsis G. Department of Mineral Resources Engineering, Technical University of Crete, Chania, Greece aut Rock Mechanics and Rock Engineering Springer-Verlag 40/3(2007-06-01), 213-243 0723-2632 40:3<213 2007 40 603 https://doi.org/10.1007/s00603-006-0125-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00603-006-0125-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stavropoulou M. Department of Dynamic, Tectonic and Applied Geology, Faculty of Geology and Geoenvironment, University of Athens, Greece aut NATIONALLICENCE 700 1- Exadaktylos G. Department of Mineral Resources Engineering, Technical University of Crete, Chania, Greece aut NATIONALLICENCE 700 1- Saratsis G. Department of Mineral Resources Engineering, Technical University of Crete, Chania, Greece aut NATIONALLICENCE 773 0- Rock Mechanics and Rock Engineering Springer-Verlag 40/3(2007-06-01), 213-243 0723-2632 40:3<213 2007 40 603 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer