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    M-30 Southern Bypass Madrid

    The $697-million project involved the construction of a 4.1 km long city tunnel, with three 3.5 m lanes, 0.5 m emergency lanes and 0.7 m sidewalks. These tunnels were between the San Isidro and Praga Bridges, including the interchange between the Pirámides and Marqués de Vadillo roundabouts, the twinning of the M-30 between SantaMaría de la Cabeza, and the N-III junction near Conde de Casal.

    A 3,538 m section of the tunnel was excavated with Dulcinea, the largest Earth Pressure Balance shield at the time of construction, with a diameter of 15.62 m.

    General Information

    Location
    Madrid, Spain
    Contract type
    Construction
    Infrastructure
    4.156-km long city tunnel with three 3.5 m lanes, 0.5 m emergency lanes, and 0.7 m sidewalks. A 3,538 m section of the tunnel was excavated using Dulcinea, the largest EPB shield at the time of the construction, with a diameter of 15.62 m. The project consisted of the underground routing of the 4.2 km main carriageway of the M30 Bypass in two sections in Madrid.
    Year of project completion
    2007

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