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Baskonia Bridge
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DESCRIPCION

This project consisted in the construction of a new bridge over the Nervión River in Basauri. That bridge will improve the access from the town to the road BI-634.
The existing bridge should be demolished for building the new projected one. However, this undertaking will be done without stopping the cycle and pedestrian traffic at any moment, thanks to an appropriate construction process.
The new bridge will not only improve the communications with the BI-634, but also will create an area of great urban and natural quality, turning into the gates of the town. In order to achieve the objectives that the project contemplates to this bridge, it will be provided with 26.2 meters width, 10.5 of them will be the road, and the sidewalks will occupy 2.8 m, and will be provided with gardens and barriers.
There is also an improvement in the road geometry, unifying the elevation of both abutments. This construction will give service to a large volume of traffic with the three 3.5m lanes that are projected, two for exit, leaving one as entrance.
 
In the search of a perfect geometric fit, to frame the river, the number of spans is reduced for avoiding the piers that the old bridge had into the river. For this reason, the structural chosen typology is the bowstring, spanning 75 meters with a secondary span of 7.5 meters, lying the bridge on two abutments and a pile located out of the river.
The integration with the surrounding area, and the council willing of becoming this bridge into a new gate for the town, were determinant for reaching the final design.
 
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Arenas & Asociados - 2012