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    Tunnels

    In recent years, underground works have taken on a special relevance thanks to a variety of factors, including research breakthroughs in geotechnics, continuous improvement in working conditions in tunnel interiors, mechanical diggers, the use of adequate ventilation systems, electronic ignition of blasting, a range of mechanical perforation devices and the definitive establishment of the tunnel boring machine (TBM) as the safest way of excavating while reducing the time required.

    ACCIONA Construction was quick to adopt these working methods and its active contribution led to the Company carrying out various stretches of the Madrid, Barcelona, Valencia and Bilbao Metro systems; road tunnels in Guadarrama (Madrid), Somport and Envalira in the Pyrenees or the Legacy Way in Brisbane (Australia); the North tunnel of the southern by-pass of Madrid’s M-30 ring road; railway tunnels on several stretches of High Speed Rail line, and urban collectors, cellars and galleries in Europe, Latin America and Africa.

    True to its unswerving commitment to society and the environment, ACCIONA carries out all of its initiatives taking into account environmental and social aspects, applying the necessary means to protect the environment.

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