Guadarrama tunnel
| Tunnel de Guadarrama | ||||
|---|---|---|---|---|
 South portal of the tunnel
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| use | Railway tunnel | |||
| traffic connection | Madrid – Valladolid high-speed line | |||
| place | Sierra de Guadarrama | |||
| length | 28.413 km | |||
| Number of tubes | 2 | |||
| cross-section | 56.7 m² | |||
| Largest coverage | 992 m | |||
| construction | ||||
| Client | ADIF | |||
| building-costs | 1.219 billion euros | |||
| start of building | 2002 | |||
| business | ||||
| operator | Renfe | |||
| release | 12/22/2007 | |||
| location | ||||
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| Coordinates | ||||
| Miraflores de la Sierra | 40 ° 46 ′ 39 " N , 3 ° 46 ′ 31" W. | |||
| Segovia | 40 ° 54 ′ 4 ″ N , 4 ° 4 ′ 10 ″ W. | |||
Map with all coordinates: The Guadarrama Tunnel (Spanish: Túnel de Guadarrama ) serves the high-speed line Madrid – Valladolid to pass under the Sierra de Guadarrama in the Iberian Divide . Construction of the tunnel began in 2002 and was commissioned in December 2007. At over 28 km, it is the longest railway tunnel in Spain and currently (2018) the sixth longest in the world (without taking underground tunnels into account).
course
The south portal is located at Miraflores de la Sierra , about 50 km north of Madrid , at an altitude of 998 m. From there the tunnel rises at 15 ‰ to a peak height of 1200 m and then falls at 9 ‰ to 1114 m at the north portal near Segovia . The largest overburden is reached with 992 m under the 2429 m high peak of Peñalara.
Each of the two direction tracks runs in a separate tunnel tube with an outer diameter of 9.45 m and an inner diameter of 8.5 m. At 30 m center distance, the west tube is 28,407.70 m and the east tube 28,418.66 m long. Connecting tunnels were created every 250 m between the tunnel tubes. These can be ventilated and serve as rescue rooms in an emergency.
history
A total of four tunnel boring machines were in use from the portals from October 2002, two each from the competing German companies Herrenknecht and Wirth . Four million cubic meters of rock, mainly granite, were excavated.
The eastern tube was cut through on May 5, 2005. The last breakthrough occurred on June 1, 2005.
The construction costs were 1.219 billion euros, 70% of which were borne by the European Union .