GUADARRAMA HIGH SPEED RAILWAY TUNNELS
Lot 1: Double-shield TBM excavated tunnel 15 km in length. Maximum overburden of 992 m, with cross galleries every 250 m.
Excavation cross-section: 9.200 mm
Tunnel lining: segmental ring 8.500 mm inner diameter
Geology: Glandular orthogneiss, meta-sediments, granitic plutonic rock. Several sets of faults.