Soil-structure interaction in tunnel construction in soft ground

Tunnel design and construction involve several specialties and may provide subjects for innovative and multi-disciplinary re- search. A strong integration between structural and geotechnical engineering, among other disciplines, can be likely envisaged in this field. To this aim interdisciplinary research should mainly focus on the solution of soil-structure interaction boundary value problems. An overview on the current trends of research in this field is provided in the paper over different scales, starting from the be- haviour of the single element of soil, dealing with the interaction between the ground and the tunnel, and finally approaching the interaction between the underground infrastructures and the built environment.