El viaducto sobre el río Deba en la «Y-Vasca» de alta velocidad

Viaduct over the River Deba on the "Basque-y" high-speed rail line

The viaduct over the River Deba on the Basque-Y high-speed rail line crosses the river valley in an area near Bergara, a town in the Spanish province of Guipuzcoa. The deck is a prestressed concrete box girder with variable depth over the piers. Built with an underslung movable scaffolding system (MSS), ist span arrangement is 50 + 80 + 70 + 60 + 3 × 65 + 70 + 65 + 70 + 3 × 65 + 45 m.

On the back of developments in recent years in Spain, the technology could be deployed to build the main 80 m span, setting a national record for high-speed rail span length using this building system.

The article contains a detailed description of the characteristics of the viaduct, as well as ist construction and the monitoring systems applied during ist erection.