Phase 2 of the project for the South End of the 16.7 km long Guadarrama Tunnel begins in the municipal district of Miraflores de la Sierra and soon reaches the 2,131 m long Soto Siding, with a gradient of 3‰. The layout crosses the M-608 road from Soto del Real to Guadalix de la Sierra, and continues over the Matarrubias stream by means of a 660 m long viaduct. At a distance of 3.4 km from the start of the stretch, the separation of the two tracks leads to the south end of the two single-track tunnels with a gradient of 3‰. The tunnel crosses the Morcuera Range with a maximum cover of 960 m (5.3 km from the mouth). At the highest point of the layout it starts the descent to the end of the stretch. The excavation of the mined tunnel, with a length of 13.4 km and an inner diameter of 8.50 m, was performed with two double shields of 9.46 m Ø clad with 32 cm thick prefabricated voussoirs, forming standard rings with a base voussoir and an inner radius of 8.50 m. The standard rings were composed of 6 voussoirs plus the keystone. To ensure safety, 11 connection galleries were built between the tunnels, 250 m apart, and an emergency room was designed (equivalent to a 500 m long by 5 m wide gallery), totalling just over 800 m of linear excavation. Furthermore, ~300 m of passing loops were also created.
• Birdseye views of the south end of the tunnel and the tunnel boring machine. • In accordance with the Environmental Impact Declaration, the entrances are located before the crossroads with the M611 road from Soto del Real to Miraflores and the excavation waste was transported on belts to the transfer plant for loading on rail wagons.
GUADARRAMA TUNNELS, SOUTH END
NEW RAIL ACCESS TO THE NORTH AND NORTHWEST OF SPAIN. SOTO DEL REAL – SEGOVIA STRETCH TECHNICAL ASSISTANCE FOR THE CONTROL AND SUPERVISION OF WORKS Segovia, 2002-2007