Marechal Carmona Bridge

Inaugurated in 1955, the Marechal Carmona Bridge over the Tejo River in Vila Franca de Xira was, at the time, the closest bridge to Lisbon connecting both riverbanks. Spanning 1224 meters, the bridge comprises a central section made up of five metallic spans, each 103.50 metres long, and two access viaducts made of reinforced concrete, one on each bank, 460 metres on the right bank and 240 metres on the left bank. The road platform is 9m wide. This is a comprehensive rehabilitation project that includes seismic retrofit. The intervention on the viaducts involves establishing the axial continuity of the deck on each viaduct, replacing the bearings on the pier walls, abutments and marginal piers with new seismic isolation bearings and introducing dampers between the deck and the marginal piers. Regarding the bridge, the proposed solution preserves the spans independent, but increases the displacement capacity of the bearings as well as the range of movement of the expansion joints. Regarding the bridge, the proposed solution preserves the spans independent, but increases the displacement capacity of the bearings as well as the range of movement of the expansion joints. The intervention also includes the shear reinforcement of the piers near the base.