So, the Vasco da Gama Bridge can resist an earthquake that is 4.5 times greater than the building resistance standards in Lisbon.Įach part of the bridge reflects this challenge. Portugal is an important earthquake zone as proven by the earthquake of 1755, which remains the largest one known to date. The earthquake risk was also taken into consideration in the design phase. Without this new technology, the land curvature and the bridge length would have distorted the project by a metre. Satellite coordination helped ensure project consistency. Given the tight deadline, a single phasing was used. First, it consists of five distinct parts: the northern viaduct, the expo viaduct, the cable-stayed bridge, the central viaduct and the southern viaduct, not forgetting the interchanges. Several elements must be taken into consideration to highlight the complexity of this construction.
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