Stretch of 3.8 km long belonging to the guipuzcoan branch line of the new rail network of the Basque Country, the socalled “Basque Y”. It is conceived for mixed traffic, with a speed of 250 km/h for passenger trasport and 135 km/h for goods. It includes an intermediate pooling system post (PIB is the spanish acronym). The layout runs in a series of tunnels and viaducts opposite the town of Tolosa, by the steep slope of the river Oria right bank. The project, of tricky fitting due to the environmental and lanscape determinants of the surroundings, requires the construction of: • Three tunnels for double track: Aldaba Txiki (687m), Auzo Txikia (210m) and Montezkue (1.544m) and an evacuation corridor in the Montezkue tunnel (446 m). • Two artificial tunnels: Olarrain (179 m) and Arane (358 m). • Four mixed built-in and semi built-in viaducts: Salubita (141 m), Oaska (93m), San Esteban (246m) and Luzuriaga (90m).
• Viaduct and tunnel transverse sections. • Infographics of the new rail layout at Tolosa slope.
PLATFORM OF THE NEW RAIL NETWORK OF THE BASQUE COUNTRY. STRETCH: TOLOSA- HERNIALDE CONSTRUCTION PROJECT Guipúzcoa, 2007-2008