Metro Red Line Extension - Oriente/Aeroporto

The design review of the Linha Vermelha (Red Line) Extension between the Oriente and Aeroporto Metro Stations comprised the following projects:

• Tunnel between the Oriente and Moscavide Stations;
• Moscavide Station;
• Tunnel between the Moscavide and Encarnação Stations;
• Encarnação Station;
• Tunnel between the Encarnação and Aeroporto Stations;
• Aeroporto Station;
• Airport Terminal Tunnel.

The project for an alternative solution for the Moscavide and Encarnação Stations’ galleries, with a witdth of about 17,5m, comprised the accomplishment of the underground excavation by means of the enlargement of the current tunnel cross section. The Attack Shaft 2, located at Alameda da Encarnação, had a 16m diameter circular section and an excavation depth of 32m. The works concern the Miocenic formations of Lisbon.