The contract involves the design (definitive and executive) and construction of two single-track tunnels, one in each direction, with 21 stations, 30 associated structures and a depot/workshop.
The new line will mainly be developed in the Municipality of Milan, encroaching, near the eastern terminus, for a small portion into the area of the municipalities of Segrate and Peschiera Borromeo. There are plans for two intersections with the existing metro lines – with the red line near the station of San Babila and with the green line near the station of Sant’Ambrogio – three intersections with the suburban railway lines – at the Forlanini FS station, the Dateo station and the San Cristoforo station – and one intersection with Linate airport. These intersections will increase the intermodal “network effect” expected from the entire urban and non-urban transport system.
It involves a light and fully automated driverless metro system, with automatic platform screen doors and a CBTC signalling system (Communication-Based Train Control); the fleet will comprise 47 vehicles with 4 intercommunicating carriages.
The contract will be for a total of 30 years, with 6.5 years for the design and construction and the remaining 23.5 years for the management stage.
|MAIN TECHNICAL DATA:|
|Open excavations: 1,230,000 m3|
|Traditional blind hole excavation: 179,500 m3|
|Excavation with milling cutter: 1,135,000 m3|
|Bucket excavation (s = 0.60-1.20 m): 216,000 m2|
|Conventional concrete: 725,000 m3|
|Coating with shotcrete: 40,000 m3|
|Steel for reinforced concrete: 60,000 t|
|Electro-welded net: 307 t|
|Reinforcement under buildings (reinforced earth): 690,000 m3|
|Waterproofing: 360,000 m2|
|Rods (50-120 t): 246,000 m|
|Minipiles (102-300 mm): 26,000 m|
Milan Metro System – Line 4