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"La Real Sociedad" Bridge
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DESCRIPCION

Due to the bad conditions that the old bridge, known as The Iron Bridge, the San Sebastián Council started a competition to design a bridge to substitute the old one to satisfy the contemporary needing of the city.
For maintaining the Urumea hydraulic gauge, which limited the possible web of the bridge, and taking into account the presence of a rail-bridge in the surroundings, a singular design was elaborated to fulfill all the requirements of the area.
The bridge is composed by two parallel beams, one of the “Warren” typology, made on steel, and the other one, in concrete, represents the cloister beams typology. The span distribution is 25+30+25 meters.
This raises a bridge whose piers are aligned with the ones existing in the railway bridge, endowing them with an hydraulic contour, remembering the canoes that cross the Urumea River, looking for a nice view that will please the eye of the rowers.
 

Having settled the infrastructure side of the bridge, comes to solve the deck issue, which has been conceived as transparent filters or veils, sifting transparency or permeability downstream with a pedestrian walkway designed as a large balcony to the Urumea river, until the cloister concrete beam upstream, with its parabolic rhythmic openings, which separate the traffic from the railway, encased in the full beam, and passing through a steel Warren truss, which delimits the traffic, protecting the bike users, who circulate between the pedestrians and the solid Warren beam.
The veils stand out, in addition to its structural layout and materials, by the color used in them. Thus, the Warren beam, painted in orange with a similar color to the surrounding brick buildings and Koipe factory facades, manages to mimic the environment, creating the first veil, actually second, if one takes into account the railing glass from the sidewalk, contrasting with the color of concrete Stone cloister beam, which gives depth to the space between Cloister and Warren beams.
It has been achieved, from our point of view, a harmonious coexistence between the four possible types of land transport in one single cross section, in which the generous wooden balcony sidewalk is the element that joins both sides of the Urumea river, and creates an area not only for crossing the river, but also for relaxing and enjoying the landscape.

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Movable Bridges

Urban Bridges

Rail Roads Bridges

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Rehabilitations

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Arenas & Asociados - 2012