Milan's M4 Metro line tunnel excavations completed

The first of two tunnel-boring machines (TBM) involved in the construction of Milan’s M4 metro line has reached the end of its journey on the central section of the line breaking through the wall of the site of the future Solari underground station.

A tunnelling boring machine operated by WeBuild Group has completed its work on the Milan M4 Metro line

11 September 2020
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The second TBM's arrival is just a few days away and between them, the machines have excavated 620,000m³ of earth along 9.2km for the line's two parallel tunnels.

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