Tunnels, environment and public -- Planning, research, development and design aspects on underground structures -- New developments in excavation and construction technology for rock and soft ground tunnelling -- Contract management, financing and risk analysis -- Operation, maintenance, drainage, water proofing, rehabilitation, renovation and repair of underground structures -- Earthquake hazards and seismic design of underground structures -- Geological and geotechnical investigations -- Tunnel machines and mechanical excavations -- Ground improvement and settlement control -- Safety -- Analytical methods and numerical modelling -- Field measurements and monitoring -- Immersed tunnels.