Solutions for soil engineering and soil-structure interaction problems need realistic and pertinent experimental and modelling tools. In this work, extensive developments proposed by theinvitedspeakers ofthe Lyon International Symposium held in September 2003are presented, including experimental investigations into deformation properties; laboratory, in-situ and field observation interpretations; behaviour characterisation and modelling; andcase histories. The contributionsinclude recent investigations into anisotropy and non-linearity, the effects of stress-strain-time history, ageing and time effects, yielding, failure and flow, cyclic and dynamic behaviour. In addition, advanced geotechnical testing is appliedto real engineering problems, and to ways of synthesising information from a range of sources while engaging in practical site characterisation studies.
