Tunnel Lyon-Turin : Pourquoi Ils Creusent Presque à l'Aveugle sous les Alpes

The Lyon-Turin Tunnel is one of Europe's most ambitious infrastructure projects. With a 57-kilometer base tunnel under the Alps and an estimated cost of over €26 billion, this colossal undertaking pushes the boundaries of modern engineering. But behind the records and promises of rapid transport lies a much more complex reality. Unpredictable geology, exploratory drilling, areas of unstable rock, natural hazards, and technical challenges force engineers to proceed with incomplete knowledge of the terrain. Why are the Lyon-Turin Tunnel teams digging almost blindly under the Alps? What dangers lie hidden beneath the Mont Cenis massif? And how do the giant tunnel boring machines manage to advance in one of Europe's most challenging environments? In this video, discover the behind-the-scenes story of Europe's largest railway construction project and the challenges that could change its future. #LyonTurinTunnel #Alps #Engineering #Megaprojects #Infrastructure #LyonTurin #Megastructure #CivilEngineering #Underground