Section: Quintanilla de Arriba (west) – Olivares del Duero
The Douro motorway, known as the A11, starts in Soria and connects Valladolid to Zamora before reaching the Portuguese border. When it is complete, it will become an alternative east-west connection in northern Spain that will not require driving via Madrid.
In a joint venture with Vias y Construcciones S.A. and Construcciones y Obras Valbuena, Grupo Ortiz will execute the section of 14.5 km that starts in Olivares de Duero and ends in Quintanilla de Arriba, passing through the municipal area of Valbuena de Duero. The section of motorway will measure 2 x 7.00 m for the lanes, 2 x 1.00 m for the inner hard shoulders (except for the sections with a central reservation of 2.00 m, in which case they will be 2 x 1.50 m) and outer hard shoulders of 2 x 2.50 m.
Three dumbbell interchanges will be constructed on the section. Interchange 1 will allow access from the VA-104 road. Interchange 2 will connect to the VA-3001 road, which goes to Renedo and Pesquera de Duero. Interchange 3 will be at Quintanilla de Arriba, connecting with the N-122.
The permeability of the motorway will be resolved by the construction of 5 overpasses, 6 underpasses, an ecoduct and 2 viaducts. Viaduct 1 (the Bajada from Páramo valley) will be 920 m long and Viaduct 2 (over the River Duero) will be 500 m. The latter is perhaps the most unusual structure in the section, because of its environmental requirements. It must be constructed by positioning the piers beyond the water flow and vegetation on the banks of the River Douro (so the span must be at least 165 m), and protecting the pine forests in the zone next to the river. This implies having as few piers as possible. The solution adopted will be the execution through successive cantilevers with spans of between 80 and 85 m, as well as the main span of 165 over the river.
The project has an execution period of 35 months and an allocated budget of €97,985,800, including VAT.