Bridges

Lezíria Bridge | Portugal

Short Description

The Lezíria Bridge crosses the Tagus River near Carregado, and seeks to connect the A10 and A13 Motorways. It was inaugurated in 2007, after a 23-month construction period.

It is the second longest bridge in Portugal, with a total length of about 11.7 km, width of 20 m and maximum height of 30 m above the riverbed.

The bridge is composed of three main structures: North Viaduct, with a length of 1.5 km, the bridge itself, with a length of 970 m and the South Viaduct, with a length of 9.2 km.

Studies undertaken in association with PC&A / Civilser / Arcadis, under the leadership of COBA.

Detail

Client: TACE, ACE (Group of Contractors)
Years: 2004-2007
Phases of the Study: Final Design
 

Vasco da Gama Bridge | Portugal

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Short Description

The Vasco da Gama bridge crosses the Tagus River in Lisbon, Portugal, through its cable stayed structure.

It was inaugurated in 1998 after a construction period of 18 months, at the time where the Expo 98 Lisbon World Exposition took place, event which celebrated Vasco da Gama's arrival in India.

With a total length of 18 km, including the access viaducts, the Vasco da Gama bridge is, at present, the longest bridge in Europe, with its 420 m-long cable-stayed span.

The Design was developed by the COBA / EEG / Proponte / Kvaerner joint-venture, under the leadership of COBA

 

Detail

Client: Lusoponte / Gattel Joint-Venture
Years: 1993-1998
Phases of the Study: Final Design
 

North Motorway - Vala da Asseca Viaduct | Portugal

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Short Description

The rehabilitation of the motorway required widening the deck, in order to add a new lane with a width of 4.35 m in each carriageway.

Particular attention was given to the differential shrinkage effects, resulting in the introduction of a lane between the new and existing decks, with a special controlled shrinkage concrete.

Detail

Client: BRISA - Auto-estradas de Portugal, S.A.
Years: 2003
Phases of the Study: Final Design
 

Bridge over the Vidigueira River | Portugal

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Short Description

This bridge is part of the section Ericeira / Mafra of A21. It crosses a wide and deep valley, where the ground possesses a high capacity for agriculture and difficult topographic and geological conditions, due to the very steep slopes.

The chosen structural solution comprises decks with spans of 140 m which cross the valley with a height of approximately 70 m.

The 480 m-long and 26.2 m-wide bridge comprises two continuous reinforced and prestressed concrete twin decks with spans of 100 m + 2 x 140 m + 100 m.

Detail

Client: Mafra Atlântico
Years: 2004-2007
Phases of the Study: Final Design