This unique viaduct of the CaldearenasLanavé stretch in the Mudéjar Highway A-23 crosses the Guarga River riverbed thanks to a 350 m long composite structure. Lights are placed in the four spans which are of 75-100-100-75 m respectively. They have been defined, according to the DIA requirements, in order to make the most of the advantages of this type of structural typology. The cross-section of the 24.80 m width box is designed with a composite deck – with constant edge of 3,40 m. The composite deck consists of a semicircular metallic box and concrete deck of variable thickness –from 0,20 m in the center to 0,40 m at the start of the cantilever- which protrudes 4,40 m from both sides. A composite “Y” shaped solution is proposed for the piles, with a concrete “bottle-shaped” shaft that connects with the “v-shaped” metallic part that resolves the arms of the structure and adapts to the decks geometry. The 40 meters of separation between the arms enables the span of the deck to be reduced and it aesthetically defines these two viaducts.
• Images of the viaduct’s construction and assembly process. The metallic support of the “v” piles adapts to the longitudinal and transversal slope of the deck by means of an intermediate wedge between the support and the concrete shaft, variable for each pile, that makes it possible to adopt a single geometry for the metallic “v”.
VIADUCT OVER THE GUARGA RIVER, IN THE MUDÉJAR HIGHWAY CONSTRUCTION PROJECT. MONITORING AND SUPERVISION OF SITE WORKS Huesca, 2010-2011