In order to respond to the increase in passengers transiting through the Lausanne train station and to serve the developing districts to the north of the city, a third metro line will complete the actual underground network: the m3 line.
In the context of this project, GEOEG quantified the impacts of the geothermal activation of the Lausanne m3 tunnel. This work involved an assessment of the impacts associated with the geothermal operation of the infrastructure on its structural and geotechnical performance, as well as sealing, fire, and safety resistances. Such an endeavor allowed to develop a detailed and optimized design of the considered tunnel infrastructure turned into a renewable energy source.