12.2km
long
INDUSTRY, INNOVATION AND INFRASTRUCTURE
Build resilient infrastructure, promote sustainable industrialization and foster innovation
Economic growth, social advancement and action against the climate emergency depend largely on investment in infrastructure, sustainable industrial development and technological progress. Today, about 1 billion people live more than 2 km from a roadway, 940 million live without electricity, and 663 million lack improved drinking water sources.
ACCIONA participates in the entire infrastructure construction value chain, from the identification of opportunity, design and execution, to the operation and maintenance of the constructed works, using the most advanced and innovative techniques.
Performance quality and safety are two of the criteria that maximize the company's value proposal in the development of large infrastructure projects and that differentiate it from other competitors in the construction field.
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 highlighted the world's first experiment with grouting to consolidate the earth by offsetting with guided drilling in a curved line. Other innovations include metal rings with gates to connect 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