La Arena Viaduct
Record: 667 m
Main Span Record: 105 m
The La Arena viaduct, on the Cantabrian motorway
Arenas, J.J.; Pantaleón, M.J.
Abstract
Within the Bilbao-Cantabrian border section of the Cantabrian motorway, the La Arena Viaduct has made it possible to cross the marshy area near the beach of the same name. Due to the local topography, the 560 m long viaduct has been designed with a double curvature in plan, with a radius of 400 m and a 7% cant at both ends. Under these conditions, the deck, continuous along its entire length and the sum of five 105 m spans plus two 70 m ends, has been stayed from masts placed in the axis of the deck and on each of the immediate piers. The construction procedure applied, described in the article, was original and appropriate for the work to have been put into service in just 18 months.
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