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  Porto Maravilha project – infrastructure works

  The Porto Maravilha Operation, in Rio de Janeiro, comprises a series of infrastructure works, among them a new road system in the old port area, namely the Binária and Expressa ways. The Saúde tunnel is part of the Binária way, and was constructed in the Saúde hill, part of a deactivated old quarry, having two 2 three-lane carriageways plus a parallel LRV track. With a 300m cross section, the excavation was performed in three steps – two lateral galleries and a central one – through gneiss biotite rock mass and saprolite. Due to asymmetrical plan geometry, asymmetrical lateral confinement and small rock cover a structural reinforced concrete lining was adopted. This lining, up to 1m thick, is subjected to major internal forces due to asymmetrical overburden. At last, settlement monitoring results are presented.

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