This viaduct crossing river Tajo is located in the high-speed rail line Madrid-Extremadura (section Cañaveral-Alcántara). The overall length of the viaduct is 1,488m. Its most characteristic element is a 324m span concrete arch spanning the riverbed of river Tajo, increased by by Alcántara resservoir. The construction process has consisted in a progressive cantilever method with two arrays of temporary cables attached to the steel towers, allowing the rail-mounted cantilever wagons to cast in sections of up to 4m long.

The bridge complexity and the challenges of its construction have motivated the conduction of different studies and analysis. Among these, we may highlight studies dealing with the analysis of the structure’s aeroelasticity phenomena during the different construction stages. On-site wind tunnel tests and several numerical studies have therefore been carried out.

Additionally, due to the works complexity and long duration, a monitoring campaign of a great number of variables was designed. This monitoring campaign has enabled the control and supervision of the bridge’s changing structural behavior throughout its subsequent construction phases.