ABSTRACT
In this paper, the geotechnical characterization of the site is reported after the descriptions of the building structure and the tunnels. Then, main features of the numerical models are described and main numerical results are related and compared. Three types of finite element analysis were carried out using Plaxis 3D Tunnel code (Plaxis 3D Tunnel, 2007): i) preliminary analyses with a simplified model to study the influence of mesh density and tolerated error on results accuracy and calculation time; the aim of those analyses was to achieve an acceptable compromise between accuracy and calculation time in the complete analyses; ii) greenfield analysis, that involves only the
construction of both tunnels (the building is not simulated); iii) full analysis to study the interaction between soil-tunnels-building. Finally, the main conclusions of this research are summarized.
