F Lo Monte, R Felicetti (Politecnico di Milano); A Meda (Univ. degli studi di Roma Tor Vergata); A Bortolussi (Bakaert Maccaferri Underground Solutions)
M. Boonpichetvong & J. G Rots* (Faculty of Architecture, Delft University of Technology, Delft, The Netherlands) *also at TNO Building and Construction Research, Rijswijk, The Netherlands