Vasco da Gama Bridge
Vasco da Gama Bridge provided the transport connection of two remote Portugal regions located on the opposite banks of the Tagus River, alleviating the congestion on Lisbon’s 25 de Abril Bridge. It seems that the structure is endless thus it has length of 12.3 km (including cable-stayed bridge and viaducts). Four separated companies were engaged in building for 3 years managed by an independent consortium. 730,000 m³ of concrete were used, and 3,300 workers were involved altogether.
Developing the project the engineers had to take into account curvature of the Earth, seismic zone requirements and local ecosystem. The marshes along the river’s edges were saved, and the illuminations were installed in such a manner that the light rays are not spreading to the water surface at night.
Opening ceremony of the engineering wonder was devoted to the 500th anniversary of reaching the coast of India by Vasco da Gama, and coincided with EXPO 1998. The structure has a life expectancy of 120 years.
Nowadays, the special-purpose vehicles are managing the traffic on the bridge. They are capable of fighting the fire and towing a broken down car which blocks the traffic. The emergency call points are located every 400 m along the bridge. The drivers appreciated quality of the road coating which prevents skidding and save travellers’ time.
Engineering achievement inspires GEOFIP team to create the products capable to prolong the operating term and to protect the surface of reinforced concrete against the repetitive loading effect and under severe chemical and climatic conditions.