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- Bologna Tunnels
Bologna Tunnels
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.
This project featured the world’s first experiment with earth-consolidating injections and compensation with guided boring along a curved line. Other innovations included metal rings with doors for connecting galleries, designed by ACCIONA.
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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