two unidirectional tunells
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.
Of the 4,156 km of the South tunnel bypass of the M-30, 3,539 km were drilled by EPB (Earth pressure Balance) tunnelling machine 'Dulcinea', which, at the time of the construction of the tunnel, was the world's largest, and the rest was performed between diaphragm walls.
The cross section of the tunnel drilled with the tunnelling machine comprises a platform consisting of three 3.50-metre wide lanes, hard shoulders measuring 0.50 m in width on either side and two pavements measuring 0.70 m in width with a 4.50 m gauge. This platform is based on prefabricated pre-stressed plates that separate it from a lower road measuring 4.80 m in width and 3.90 m in height, which serves as a rail and rescue service.
The North tunnel of the South bypass has emergency and evacuation galleries and four ventilation shafts.
The 107-metre long EPB tunnelling machine has two cutting wheels: the inner cutting wheel has a diameter of 7.00 m and the coaxial outer wheel has a diameter of 15.16 m. Both cutting wheels are mounted on the same level plane, allowing them to operate in clockwise and anti-clockwise rotations independently of each other.
- Location: Madrid, Spain
- Contract type: Construction
- Infrastructure: Urban tunnel measuring 4,156 km long with 3 3.50-m wide lanes and a 0.50-m wide hard shoulder, with 0.70-m wide pavements. 3,538 m of the tunnel were drilled using Dulcinea, the largest EPB tunnelling machine at the time of construction, with a diameter of 15.16 metres.
- Year of project completion: 2007