Bridge over the Enns river, in Austria

• Published in: Informes de la Construcción
• Main Author: Polensky & Zöllner, Constructora
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: Consejo Superior de Investigaciones Científicas 1965
• Subjects: Curva; Andenes
• Online Access: https://informesdelaconstruccion.revistas.csic.es/index.php/informesdelaconstruccion/article/view/4343; https://doi.org/10.3989/ic.1965.v18.i173.4343

A road bridge has been recently opened over the Enns river at Steyr (Austria). The purpose is to improve traffic and avoid the bottlenecks that often took place. The bridge is supplemented by three other works of lesser importance, namely two bridges and a tunnel for pedestrians. The bridge structure supporting the decks is cellular, box type. It has three compartments, and four vertical partitions, whose thickness varies from 6 m over the intermediate piles to 2.30 m at the crown. There are three spans, of 47, 101 and 70 m length. The bridge intrados forms a smooth curve. Two overhangs extend from the central structure, and provide sidewalks for pedestrians: the deck itself having a width of 17 m. The structure was made in successive overhangs, in 3.50 m sections. Longitudinal prestressing, by means of PZ-A-100 type cables, was done by applying an initial loading of 120 t. The cables run in tubes. After the concrete had reached a suitable strength, the cables were stretched. The tubes were then filled with cement mortar, and in this operation air suction equipment was utilised to make sure that no air cavities were left. Se ha construido y puesto en servicio un puente para carretera sobre el río Enns en Steyr (Austria), con objeto de mejorar la circulación de vehículos y evitar las congestiones que se producían frecuentemente. Complementan al puente otras tres obras de menor importancia, constituidas por dos puentes y un túnel para el paso de peatones. La estructura que soporta el tablero es celular, tipo cajón, de tres células y cuatro almas y tabiques verticales, con canto variable desde 6 m sobre las pilas intermedias a 2,30 m en la clave. El puente se subdivide en tres tramos de 47, 101 y 70 m de luz, respectivamente. El intradós sigue el perfil de una curva suave. Del cuerpo de la estructura salen dos ménsulas que soportan los dos andenes para peatones, quedando el tablero con una anchura total de 17 metros. La estructura se construyó, en voladizo, por trozos de 3,50 m de longitud. El pretensado ...