ABSTRACT
The expansion of Lisbon’s Subway network through the transformation of the Green and Yellow lines into a Circular line is being developed. The project for this new line includes two new stations and connections to existing stations, as well as two ventilation and emergency exit shafts and about 2 km of new tunnels. In this paper, it will be addressed the design of the new Santos station and adjacent tunnel constructed using the conventional method through challenging ground conditions, low overburden, including sections with half a diameter of ground cover and located in an archaeologically conditioned area, on a hillside, where a 16th century monastery was placed. The existing buildings were built after the occurrence of the massive earthquake that affected and destroyed much of the city in the 18th century, and many of them were founded in rubble fills supported by gravity walls.
