Detalhes do Projeto

TAGUS RIVER BRIDGE (25TH APRIL)

Client: GECAF – Gabinete de Gestão das Obras de Instalação do Caminho de Ferro na Ponte sobre o Tejo em Lisboa
Location: Lisboa – Portugal
Conclusion Year: 1999

This work was characterized by the following activities:

• Structural reinforcement of the bridge including installation of two secondary suspension cables parallel to, and some 3.5m above, existing ones, reinforcing the stress-beams and construction of new exterior anchorage points alongside existing ones on Av. India and on the Tagus river southern embankment.
  
• Construction of the twin track railway deck inside the stress beams and respective catenaries as well as all signalling and control systems.
  
• Widening of the road deck to six lanes.
  
• General improvements to the existing structure including stripping and total repainting.
  
• Replacement of existing decorative, traffic and aircraft warning lights.
  
• Construction of rail deck under the Alcântara viaduct road deck to support the railway link.
  
• General improvement to the road deck on the Alcântara viaduct with removal of some oscillation joints and replacement of others.
  

Relevant data:

Structural steel use on the bridge and Alcântara viaduct: 25 000 ton
Excavations for anchorages foundations: 85 000 m3
Volume of concrete: 85 000 m3
Foundations piling Ø 1,50 m: 3 600 m
Total area painted: 600 000 m2
Dead load of the existing bridge: 36 500 ton
Additional dead load due the installation of the railway deck and the widening of the road deck:  16 000 ton
Horizontal force bearing component installed on the secondary cable and transmitted to each new anchorage point: 49 900 kn