Completed in 2007, this bridge is the first steel structure in the High-Speed Railway (HSR) joining the city of Madrid and Barcelona. The 2,854 ft (870 m) long bridge is very close to the international airport of Barcelona. The 55 ft (17 m) wide bridge accommodates two ballasted tracks on a 45 ft (14 m) wide deck.
The first 1,115 ft (340 m) of the aerial structure comprises a continuous steel structure with six spans measuring 144+206+206+206+206+144 ft (44+63+63+63+63+44 m), respectively, crossing a five-lane highway and a railway line. The steel bridge is a king post truss with curved diagonals, which was built using the launching method. The trusses support a composite steel-concrete deck that consists of 3 ft (1 m) deep transverse I-beams spaced 9 ft (3 m) apart. The bottom chords, the King posts and diagonals consist of steel box girders.
The second part of the bridge with a length of 1,738 ft (530 m) that crosses the Llobregat River, consists of a continuous pre-stressed concrete bridge with a maximum span of 164 ft (50 m). This second section was constructed using a regular cast-in-place concrete method and self-propelled form traveler.
Design was carried out meeting the Eurocode requirements, including strict provisions related to the dynamic behavior and rail-structure interaction given the complexity of High-Speed Rail bridges structures. To achieve cost-effective solutions, the bridge design relied on the optimal use of materials and the careful design of structural systems. To avoid interfering with the traffic underneath, incremental launching construction was used for the steel bridge.
J.A. Sobrino - Moving at the speed of steel. Civil Engineering Magazine, Volume 78, Number 4 pp. 69-75. ASCE, April 2008.
J.A. Sobrino - Two steel bridges for the high speed railway line in Spain. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Stahlbau, vol 79, issue 3, pp. 181-187, March 2010.