Design and construction

The project comprises two 6.1-km tunnels for which two Earth Pressure Balance tunnel boring machines of 9.4-m diameter were used. The excavation of the tunnels in an intensely urbanized context and the heterogeneous ground conditions required a particular methodology in order to minimize the effect on the existing structures and facilities on the surface.

General Information

  • Location: Bologna, Italy
  • Contract type: Design and construction
  • Infrastructure: Two 6.1 km-tunnels for which two EPB tunnel boring machines with a 9.4-m diameter were used
  • Year of project completion: 2007

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