Helleberg tunnel
| Helleberg tunnel | ||||
|---|---|---|---|---|
| traffic connection | SFS Hannover – Würzburg | |||
| length | 1641 m | |||
| Number of tubes | 1 | |||
| Largest coverage | 70 m | |||
| construction | ||||
| Client | German Federal Railroad | |||
| start of building | May 1986 | |||
| completion | 1988 | |||
| business | ||||
| operator | DB network | |||
| release | 1991 | |||
| location | ||||
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| Coordinates | ||||
| North portal | 51 ° 53 ′ 54 " N , 9 ° 59 ′ 47" E | |||
| South portal | 51 ° 53 ′ 2 " N , 9 ° 59 ′ 30" E | |||
Map with all coordinates: The Hellebergtunnel is a 1,641 m long railway tunnel on the high-speed line Hanover – Würzburg ( route kilometers 58.0 to 59.6) in the Northeim district , Lower Saxony .
Geographical location
The Helleberg tunnel is located in the Hoheroth, a 250.1 m above sea level. NN high elevation of the Helleberg ridge northwest of Bad Gandersheim . Dankelsheim and Ohlenrode are located near the northern tunnel portal . The southern tunnel portal is between Bad Gandersheim and the district of Heckenbeck . To the north, after a cut, a farm road bridge and a 140 m long dam, the Ohlenrode valley bridge connects . After a cut (in the city forest) and a short dam, the Mahmilchtalbrücke leads south to the nearby Wadenberg tunnel .
course
The route runs straight along its entire length. The gradient falls to the south by 3.368 per thousand. The maximum overburden is 70 m. Rocks from all levels of the Triassic are pierced ( red sandstone in the south, shell limestone and Keuper in the north).
history
planning
The north portal of the tunnel was changed during the planning phase: by relocating it to the north and lowering the gradient , it could be placed outside the forest. At the same time, it should be possible to mine the entire length of the tunnel. Compared to the regional planning procedure, the tunnel was extended by around 660 m to the length of 1499 m planned at that time (1984). In mid-1986 the length was given as 1598 m.
The entire length of the tube was in the planning approval section 2.11 of the new line.
construction
The tunnel was largely constructed using the mining method, only 116 m in the north were constructed using the open construction method. The advance was carried out increasing from south to north. The excavation work began in May 1986 and should (planning status January 1987) be completed in August 1987. Alongside the Rengershausen tunnel and the Mündener tunnel, the tunnel was knocked through as one of the last three tubes on the route . The drive was finished in October 1987.
The tube was completed as one of the last tunnels on the route. A variety of Triassic geological forms had proven difficult. While all formations of the Triassic were found in the Helleberg tunnel, these were only found sporadically in other tunnels.
Together with the neighboring Wadenberg and Hopfenberg tunnels to the south , 365,000 m³ of tunnel excavation were incurred, and 515,000 m³ of earth was removed in the pre-cuts. A total of 85,000 m³ of concrete and 2,900 t of steel were used. The construction cost for the three tubes is 90 million D-Marks (about 46 million euros ).
Individual evidence
- ↑ a b c d e Deutsche Bundesbahn, Bundesbahndirektion Hannover, project group Hannover – Würzburg North of the railway construction center: Tunnel construction in the northern section of the new Hanover – Würzburg line , brochure (22 pages), as of January 1987, p. 11
- ↑ a b c DB project group Hanover-Würzburg (North) (Ed.): New line Hanover-Würzburg: Bad Gandersheim. , Brochure (14 pages, folded) as of April 1, 1984.
- ^ Deutsche Bundesbahn (Ed.): Route map of the new Hanover – Würzburg line. Hanover – Northeim section . Map from June 1986.
- ↑ a b Without author: Annual review 1988 . In: The Federal Railroad . Vol. 65, No. 1, 1989, ISSN 0007-5876 , p. 61.
- ^ Project group NBS Hanover of the Bahnbauzentrale, Bundesbahndirektion Hanover (ed.): Tunnel construction in the northern section of the new Hanover - Würzburg line . Brochure as of November 1987, p. 12.
- ↑ The high-speed age is approaching . In: Die Bahn informs , ZDB -ID 2003143-9 , issue 1/1989, pp. 4-8.