Bridge over the River Ferreira, Spain

Abstract

The purpose of this bridge is to improve the intersection of the CN.540 road, from Lugo to Orense, with the 547 road. The chosen structural type meets the conditions of quick construction and cheapness that were paramount in this case. The superstructure of the bridge consists of six intermediate piles, and two abutments, which support seven straight spans with metallic longerons and reinforced concrete deck. The span over the river is 21 m long, and de others, all equal, are 15 m long.The total deck width is 9 m, of which 7 m are for road pavement, and 1 m on each side is reserved for pedestrians sidewalks. The reinforced concrete piles form portal frames, and have circular supports and rectangular dintels. The foundations consist of reinforced concrete blocks, and rest on layers of metamorphic slate into which the foundations penetrate sufficiently deeply to reach sound rock. The project is completed with approach roads to the bridge and the intersections of the roads that converge on the bridge.