Client
Deutsche Bahn AG, Germany
Main contractor
Arge Marti Coburg Ost , Germany
Construction period
November 2011 – December 2012
Object description:
Tunnel Feuerfelsen and Rennberg are parts of the traffic project „Deutsche Einheit Nr.8.1“, construction of a high –speed railway Nürnberg-Erfurt-Leipzig/Halle-Berlin.
Construction technology:
Tunnels are designed as single tubes, double track system. Tunnel uses double shell construction with external shotcrete primary lining and internal secondary lining from cast reinforced concrete of class C 30/37. By the reason of existence groundwater inflow are tunnels insulated by 3mm insulating foil SPO (flexible polyolefin) before secondary lining installation. Geotextile 1000g/m2 is used under insulation as drainage layer.
| Tunnel parameters | Feuerfelsen | Rennberg |
|---|---|---|
| Length | 1043 m | 1072 m |
| Clear height | 8,88 m | 8,88 m |
| Clear width | 13,70 m | 13,70 m |
| Maximum gradient | - 2,50 | + 19,95 |
| Thickness of secondary lining | 45 cm | 45 cm |
| Cross-section | 101 m2 | 101 m2 |
| Number of escape galleries | 2 ks | 2 ks |
| Length of escape galleries | 225 m | 130 m |
| Escape shaft | 0 ks | 1 ks |
| Minimum thickness of hanging | 8 m | 8 m |
| Maximum thickness of hanging | 30 m | 40 m |
| Proposed speed limit | 300 km/hod. | 300 km/hod. |