Overland and Underground Railway of Milan

Construction of pilot tunnel for an overall length of 2,500 lm from Piazza Repubblica to Piazza Emilia in Milan. Carried out with mechanised tunnel boring machine and active thrust for support of the excavation front.

Cladding in metallic hoops and wooden planks; inner Ø of 3 lm

3 access shafts to tunnel 18 lm deep built with concrete walls