BRIDGE OVER THE RIVER NALÓN

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Location: Muros de Nalón, Asturias (Spain)

Owner: Ministry of Public Works

Client: Ferrovial

Type: Multi-span composite bridge with prestressed concrete sculptural piers

Design: 2000

Construction: 2004 - 2007

Cost: € 17.2 million

Scope of work: Basic design, construction design, technical assitance to project management

Description

This Project applies all the features of strict composite box systems on a large bridge.

The main section is a rigid-frame structure with 2 twin-piers in prestressed concrete which are connected to the bottom slab of the box girder in such a way that the bottom flange plates, pass completely outside. These plates are connected to the webs which are topped by the upper flange plates; these being connected to the prestressed deck slab.

The continuos sections of the skyways are similarly designed in areas of negative bending moments.

The steel box girder has been launched from both abutments with special attention to the variable depth stretch.

Technical specifications

- Total length: 1,100 m
- Main span: 124 m
- Width: 27 m


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