ABSTRACT
The paper addresses the complexities of designing and executing tunnels in seismic regions, using a recent project in the Swiss Alps as a case study. The study presents a seismic design methodology for tunnels, using numerical modelling, emphasizing the role of soil-structure interaction and dynamic responses influenced by factors such as ground motion, overburden height, and tunnel construction methods. The authors propose a spectral approach based on Eurocode standards, to assess seismic forces on tunnel linings. A case study of the Tunnel d’Euseigne in the Swiss Alps demonstrates the practical application of the method, showing that different seismic wave directions and overburden heights significantly affect the tunnel’s structural integrity. The study concludes that proper design, including careful consideration of reinforcement and construction techniques, is crucial to enhance seismic resilience in tunnel design.
