The activities by ENSER include the detailed design of a new access (corridor and stairway) from the existing ticket office to the ground level, and the modification of the current emergency exit.
Furthermore a new direct access from the railway platforms to the ground level was designed. These works include a deep excavation inside a frame of concrete diaphragms qith the top-down method. The dimension of this access are approx. as follows:
Excavation surface = 30m x 15m;
Excavation depth = 25m.
More details about this project can be found in this article.