BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:Numerical Modelling in Mechanised Tunnelling DTSTART:20161104T121500 DTEND:20161104T131500 DTSTAMP:20260408T071126Z UID:44586c12c6278eb08ed55fc796b6c5746586be05579d98511f865323 CATEGORIES:Conferences - Seminars DESCRIPTION:Prof. Dr Emilios Comodromos\, Department of Civil Engineering at the University of Thessaly\, Greece\nAbstract : The continuous developm ent of mechanized tunneling technology substantially improves its effectiv eness for the construction of tunnels in urban areas and as a result Tunne l Boring Machines (TBMs) combined with the earth pressure balanced (EPB) s hield have been extensively used over the last decades for the constructio n of tunnels in urban areas. The ability of the EPB method in controlling the induced settlements by regulating the pressure applied to the tunnel f ace\, the pressure beside the shield and the pressure of the mortar behind the final lining renders the method the most effective\, particularly in urban areas with loose soils and /or adjacent buildings interacting with t unnels’ construction stages. However\, the limitation and requirements o n soil subsidence and movements of adjacent buildings demonstrated that ma ny questions remain for the scientific community to resolve regarding the application of the method and the adjustment of various parameters (applie d pressures\, construction phases\, etc.) affecting induced ground movemen ts. The experience gained from the comparison of predictions and observed behavior during tunnelling process demonstrated that an appropriate\, safe and cost effective design of a tunnel in urban environment requires relia ble computational methods for the prediction of ground movements and induc ed displacements to adjacent structures\, as well as stress relaxation and stress concentration in the vicinity of the tunnel and in final lining\, respectively. The first attempts to simulate EPB shield tunnelling were ra ther simplified and limited to two-dimensional (2D) numerical analysis whi le in the first efforts of 3D analysis the interaction between the TBM\, t he grouting behind the shield and the lining was disregarded and the effec ts were taken into account by considering distributed forces at the circum ference of the excavation. Nowadays\, the development and continuous advan ces in numerical methods and computer engineering have provides the capabi lity of multi-stage 3D numerical process taking into account almost all re levant components of shield tunnelling. A case study from the ongoing Thes saloniki subway is presented\, addressing the above topics and the assessm ent of the potential ground and adjacent buildings response.\n\nBio : Prof . Emilios Comodromos his diploma of civil engineering from the Aristotle U niversity of Thessaloniki (1986) and a D.E.A from École Centrale Paris (1 987). In 1991 he has been awarded a Ph.D. degree by the Aristotle Universi ty of Thessaloniki for his work in the area of simulation of excavation in elastoplastic soils. His domain of interest\, specialization and fields o f activity covers the analysis and design of infrastructures involving geo technical engineering and soil-structure interaction projects (tunnels\, f oundations\, retaining structures\, rock-fill dams\, embankments\, slope s tability\, reinforced embankments). His professional experience includes t he design and consulting services of over 400 projects covering the aforem entioned topics. Since 1999 he has been in the Department of Civil Enginee ring at the University of Thessaly. He is the Head and principal investiga tor of the Computational  Geotechnical Engineering Laboratory. Emilios Co modromos is the author of three books and over 100 journal and conference papers. He is also Reviewer in more than 10 journals in the field of geot echnical engineering (Géotechnique\, IJNAMG\, ASCE\, Computers and Geotec hnics\, Soils and Foundations\, etc). LOCATION:GCA331 http://plan.epfl.ch/?lang=fr&room=GCA331 STATUS:CONFIRMED END:VEVENT END:VCALENDAR