Infraestruturas de Portugal, S.A. has awarded Teixeira Duarte – Engenharia e Construções (TD-EC) the contract entitled “EN10, km 118+560 – Marechal Carmona Bridge – Rehabilitation and Structural Strengthening”, with a contract value of €21.5 million and an execution period of 30 months.
The intervention on the Marechal Carmona Bridge, a historic road infrastructure crossing the River Tagus, has as its main objective the bridge’s comprehensive rehabilitation and seismic strengthening, ensuring compliance with current requirements for safety, structural performance and durability.
As part of the contract, a new power, telecommunications and telematics systems network will be implemented, including independent connections for the infrastructure’s various safety systems, namely maritime and road signage, variable message signs and video surveillance systems. The existing lighting will also be fully redesigned, including the installation of new functional and decorative lighting. In addition, the works include the rehabilitation of the upstream EPAL water supply pipeline and the full replacement of the downstream pipeline, both located beneath the bridge’s footway slab.
Inaugurated in 1951 and with a total length of 1,224 m, the Marechal Carmona Bridge was, until 1966, the road crossing of the River Tagus closest to the city of Lisbon. Its structure comprises a 517.5 m central steel section, consisting of five spans of 103.50 m each, and two reinforced concrete access viaducts, measuring 460 m on the right bank and 240 m on the left bank.
The accesses to the viaducts are formed on embankments, extending for approximately 500 m on the left bank, while on the right bank the bridge connects to the current EN1 and to the Lisbon–Carregado Motorway. The bridge’s cross-section comprises a 9.00 m-wide carriageway, with two lanes in the Porto Alto–Vila Franca de Xira direction and one lane in the opposite direction, as well as 1.50 m-wide footways on each side.
Most of the works will be carried out using TD-EC’s own resources, involving a multidisciplinary team from the Infrastructure and Metalworking areas. This is a complex rehabilitation contract, technically challenging and an opportunity to demonstrate the skills that so clearly define the Company as a true “House of Engineering”.