Mill head tunnel

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Mill head tunnel
length 1345 m
Largest coverage 20 m
construction
Client German Federal Railroad
start of building 1983
business
operator DB network
release 1991
location
Mühlenkopf tunnel (Lower Saxony)
Red pog.svg
Red pog.svg
Coordinates
East portal 51 ° 21 ′ 40 "  N , 9 ° 34 ′ 20"  E
West portal 51 ° 21 ′ 29 "  N , 9 ° 33 ′ 14"  E

The Mühlenkopf tunnel is a 1345 m long railway tunnel on the high-speed line Hanover – Würzburg between Göttingen and Kassel ( line kilometers 131.9 to 133.2). The tube passes under uninhabited areas of the Staufenberg community in the southernmost part of Lower Saxony .

course

In the tunnel, the new line cuts a tight loop of the Fulda .

The route describes, towards the south, first a right, then a left curve. The gradient falls continuously towards the south with 9.506 per thousand. The cover is up to 20 m.

The tunnel crosses highly loosened formations of the Middle Buntsandstein with layers of the Hardegsen and Solling series. Due to the low strength and the high deformability of the mountains, there was a risk of floor elevations and ground fractures . Instead of blasting, a roadheader was used to create the dome .

To the north, after a 300 m dam in the Ickelsbachtal, follows the Mündener Tunnel, the second longest tunnel in Germany. To the south of the structure is the Kragenhof Fuldatal Bridge .

history

planning

The realized length of 1345 m had already been planned at the end of 1983. In 1987 the length was given as 1343 m.

construction

With the attack on the Mündener and Mühlenkopf tunnels on October 27, 1983, construction work on the section between Kassel and Göttingen officially began. The tunnel sponsorship had Annemarie Döring , wife of former Göttingen District Administrator Willi Döring adopted. Around 1000 spectators attended the ceremony, at which the two tunnel godmothers triggered the first blast with a button. The tunnel was hit in the Ickelsbachtal, at its north portal.

The drive was carried out from north to south, from the north portal and a centrally located construction pit. In contrast to many other tunnels along the route, there was no counter-drive from the south portal. In order to penetrate kaolinized sandstones , the dome had to be built roughly in the middle of the route under the protection of a bored pile wall in a construction pit. A short section in the middle was created using an open construction method due to the low covering. The tunnel was cut through on July 19, 1985 at the south portal.

During the construction of the Mühlenkopf tunnel - including the southern section of the Mündener tunnel - 520,000 m³ of tunnel excavation and 220,000 m³ of the pre-cuts were incurred. A total of 135,000 m³ of concrete and 4,400 t of steel were used. The construction period was between 1983 and 1987, the construction cost was 120 million D-Mark (61.3 million euros ). The companies Dyckerhoff & Widmann AG (Frankfurt am Main) and Bilfinger + Berger AG (Hanover) were commissioned to carry out the construction .

As an ecological compensation measure for the construction of the Mühlenkopf and the neighboring Mündener Tunnels, a wetland area of ​​around half a hectare was created above the new line. At the request of the Göttingen district, the Federal Railroad also financed a new wetland area in the Staufenberg district of Nienhagen as a replacement measure. Several nature conservation associations had called for a bridge to be built in place of the dam in the Ickelsbachtal.

Large exercise

On May 5, 2001 there was a large-scale exercise in the Mühlenkopf tunnel. A simulated emergency braking of an ICE-3 -Zuges, which was to save many injured. The interaction of rescue workers, emergency managers and experts from the DB, and the use of the budget for these cases was rehearsed rescue trains from Kassel and Hildesheim.

Individual evidence

  1. ↑ 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), status: January 1987, p. 18.
  2. ^ A b c Deutsche Bundesbahn, Federal Railway Directorate Hanover, Project Group Hanover – Würzburg North of the Bahnbauzentrale (publisher): New Hanover – Würzburg line. The Göttingen – Kassel section , 36 A4 pages, Hanover, October 1983, p. 24.
  3. ↑ Deutsche Bundesbahn, Federal Railway Directorate Hanover, Project Group Hanover – Würzburg North of the Bahnbauzentrale (publisher): New Hanover – Würzburg line. The Göttingen – Kassel section , 36 A4 pages, Hanover, October 1983, p. 8.
  4. ^ DB project group Hanover-Würzburg (North) (Ed.): New Hanover-Würzburg line: Rosdorf, Mengershausen , brochure (12 pages, folded) as of September 1, 1983.
  5. ↑ a b 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. 21.
  6. ^ A b Report on new line tunnels in Lower Saxony . In: Railway technical review . 32, No. 12, 1983, p. 854 f.
  7. ↑ New tunnel for faster trains ( Memento from October 31, 2014 in the Internet Archive ). In: Hamburger Abendblatt , October 27, 1983, p. 36.
  8. ↑ Belter: Great progress in building the tunnels for the new lines . In: Der Eisenbahningenieur , 34, 1983, issue 12, p. 661 f.
  9. ↑ Deutsche Bundesbahn, Federal Railway Directorate Hanover, Project Group Hanover – Würzburg North of the Bahnbauzentrale (publisher): New Hanover – Würzburg line. The Göttingen – Kassel section , 36 A4 pages, Hanover, October 1983, p. 7 f.
  10. ↑ ICE accident large-scale exercise on the Escherode volunteer fire brigade website.

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