Launching the Vicario Viaduct: Andalucia, Spain

摘要

The Vicario Viaduct is located in the A-44 motorway, in the South-East part of Spain. It crosses a natural gorge, near the town of Izbor in the province of Granada.rnA single continuous steel-concrete composite deck, 24 m wide and 175 m long, divided in two 87,5 m spans, has been built.rnThe cross section is a single structural steel box, 8,00 m wide and 4,52 m deep. The total width of 24 m is reached adding a strut and tie system each 4,375 m on both sides of the box.rnThe steel parts of the deck were entirely constructed in the workshop and then they were erected on site just behind one of the abutments. Finally a 27,5 m long steel nose was connected to launch the deck.rnThe main problems have been the curved shape of the deck (1420 m radius in plan) producing a non symmetric transverse distribution of reactions on each support and the cantilever reaching 87,5 m long, producing a maximum deflection of 1500 mm.