San Paolo Metro - Line 2

The San Paolo Metro Extension of Green Line 2 (Lot 2) construction contract sees a 6.5 km double track underground line, excavated with the use of a 11.4 meter diameter Double Mode TBM for 80% of its length. The remaining of Lot 2 includes 2 stations, conventional excavated tunnels and shafts. The dual mode allows the excavation to smoothly proceed through both hard rock and soil, which will both be encountered on its way through. Given the strong urbanization, the project faces the restrictions and typical critical issues related to a city metro line.