Abstract:
The Red Line of the Metropolitano de Lisboa runs between the Oriente station and the Alameda
station. At the Oriente side, the line is being extended to the Lisboa Airport, while in the Alameda
side, the line is being extended to the new S. Sebastião station, at the heart of Lisboa.
For the construction of the Metro link between Alameda and São Sebastião Station, an EPB TBM
was used. The construction started with a 22 m circular shaft at the Alameda side, where the TBM
was assembled. The access shaft position was lateral to the alignment of the existing main Red Line
alignment. A 110 m long NATM connection tunnel was necessary to connect the new branch from
Alameda to São Sebastião to the existing one, at the Alameda II station end,...