FREIXO BRIDGE OVER THE RIVER DOURO

Client

Junta Autónoma de Estradas (Currently Infraestruturas de Portugal, S.A.)

Location

E1 / IP1 / A20 – Porto, Portugal

Design date

1991 - 1991

Construction date

1993 - 1995

Design by

António Reis and Daniel Sousa in joint authorship (developed at GRID, Lda.)

Services

Preliminary Design (1987); Detailed and Final Design, including Additional studies: geological - geotechnical and river hydraulics (1991); Technical Assistance during construction (1993-1995)

Summary

Prestressed Concrete Box Girder Bridge. Contruction by Cantilever Method with max. cantilever of 75m from pier axis.

Additionally to the limitations issued by the Douro River, other difficulties were revealed in the foundations works, with very heterogeneous situations between the different foundations sites that required design solutions adapted to each case. Thus coexisting direct foundations: (soaked footings with 7 m height), indirect deep pile foundations and 'floating' piles in the sand massive.

Length / Span / Height / Width:

705 m / 150 m / 33 m / 36 m

FREIXO BRIDGE OVER THE RIVER DOURO

Project detail