LA CODINA TUNNEL
Infraestructures de la Generalitat de Catalunya (Regional Government of Catalonia Infrastructure Agency)
Tunnel convergence issues since construction on a 50 m section.
Construction method: NATM (explosives and mechanical)
Geology: Tertiary soils composed of shales and sandstones with soft clay intercalation and a presence of water in rock joints. Landslides and significant over-excavation on the tunnel crown and shoulders made work more difficult.
Detailed design for repairs.