Viaduct over the River Ebro on Zaragoza?s Fourth Ring Road

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Title: Viaduct over the River Ebro on Zaragoza?s Fourth Ring Road

Author(s): Llombart Jaques, J. A.; Revoltós Fort, J.; Fernández, J.

Publication: ACHE

Volume: 61

Issue: 256

Appears on pages(s): 41 - 58

Keywords: Balanced cantilever construction, braces, evolutionary section, external prestressing, river work.

Date: 1/3/2010

Abstract:
The Fourth Ring Road of Zaragoza crosses the River Ebro over a 396 m long viaduct on the stretch between the N-232 road and the A-2 motorway. The deck was constructed using a continuous beam of prestressed concrete divided into 5 spans that measure a maximum of 92 m. The single deck was designed for both roadways with a total width of 26.60 m. In the first phase, the central box girder of the deck was built by the cast-in-situ balanced cantilever method, whereas in the second phase the side cantilevers of the section were constructed using mobile framework that slid over the previously built core.


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