Mackenrodt tunnel

Mackenrodt tunnel
	View of the north portal (2010)
place	Early
length	849 m
Number of tubes	1
Largest coverage	17 m
construction
Client	German Federal Railroad
start of building	July 1984 (start of tunneling)
completion	March 1985 (end of tunneling)
business
operator	DB network
release	1991
location
Coordinates
North portal	51 ° 26 ′ 58 " N , 9 ° 48 ′ 2" E
South portal	51 ° 26 ′ 37 " N , 9 ° 47 ′ 34" E

Map with all coordinates: OSM | WikiMap

The Mackenrodttunnel is an 849 m long railway tunnel on the high-speed line Hanover-Würzburg ( route kilometers 112.8 to 113.6). It passes under the Jühnde community in southern Lower Saxony .

course

View of the south portal. The entrance signals for the Jühnde overtaking station can be seen in the tunnel .

The route runs straight in the tunnel. The gradient drops continuously from north to south, mostly at 12.499 per mille. The cover is around 17 m over almost the entire length. The tube lies continuously in the lower shell limestone .

To the south, after a 900 m long cut , the Rauhub tunnel follows . To the north is the Jühnde overtaking station .

history

planning

Originally, a wide incision was planned in place of the tunnel. From a technical, economic and landscape protection point of view, the decision was made in favor of the tunnel section. At the end of 1983 a length of 816 m was planned. Among other things, a prehistoric burial ground could be spared.

In the planning phase, the tunnel was part of plan approval section 4.3 of the new line. The tunnel had been allocated in November 1983. The construction work could only begin after the breakthrough of the neighboring Endelskamp tunnel to the northeast .

construction

Tunneling began in July 1984 and ended in March 1985. Because of the low cover, it was built using the cut-and-cover method. The inner shell was designed with a thickness of 30 cm. The ceremonial opening of the tunnel was celebrated on September 7, 1984. The tunnel sponsorship was Marianne Hasselmann, wife of the then Lower Saxony Minister for Federal Affairs, Wilfried Hasselmann .

In addition to the Leinebusch and Endelskamp tunnels, the tunnel is part of a series of three tubes. A total of 390,000 m³ was excavated for the three structures and 675,000 m³ were excavated for the pre-cuts. A total of 81,000 m³ of concrete and 4,400 t of steel were used; the construction period ran from 1984 to 1986. The total cost of all three tubes was 95 million Deutschmarks.

The tube was the last in the tunnel section between Kassel and Göttingen struck . Before that, the Endelskamp tunnel had to be broken through.

The companies Dyckerhoff & Widmann AG (Frankfurt am Main) and E. Heitkamp GmbH ( Herne ) were commissioned.

A total of 390,000 m³ of material was excavated from the three tunnels. A further 675,000 m³ of excavated material are accounted for by the pre-cuts .

Arson

On the morning of June 8, 1986, a fire broke out in the tunnel about 200 m from the north portal. The fire was extinguished by the emergency services, who reached the scene of the incident around 15 minutes after the alarm, after almost two hours. The cause was arson determined. There was material damage to the tunnel and the parked construction machinery and equipment amounting to 1.5 million DM. The construction site was not secured and unguarded.

Web links

Commons : Mackenrodttunnel - collection of pictures, videos and audio files

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), status: January 1987, p. 16.
^ ^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. 23 f.
^ DB project group Hanover-Würzburg (North) (Ed.): New Hanover-Würzburg line: Rosdorf, Mengershausen , brochure (12 pages, folded) as of September 1, 1983.
↑ ^a ^b ^c DB project group Hanover-Würzburg (North) (Ed.): New line Hanover-Würzburg: Jühnde . Leporello as of October 1, 1984.
↑ Belter: Great progress in building the tunnels for the new lines . In: Der Eisenbahningenieur , 34, 1983, issue 12, p. 661 f.
^ Deutsche Bundesbahn, project group Hanover – Würzburg North of the railway construction center, Federal Railway Directorate Hanover: The new Hanover – Würzburg line. The Göttingen – Kassel section . Brochure (36 pages), October 1983, p. 24.
↑ ^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. 18.
^ H. Raab: Discussion about fire protection in tunnels . In: 112 - The magazine of the fire brigade , ISSN 0942-0134 , issue 7/1986, pp. 338–348.

[db-nord-1987-16-1] 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. 16.

[db-1984-23-2] 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. 23 f.

[nbs-1983-4142-3] DB project group Hanover-Würzburg (North) (Ed.): New Hanover-Würzburg line: Rosdorf, Mengershausen , brochure (12 pages, folded) as of September 1, 1983.

[nbs-1984-43-4] DB project group Hanover-Würzburg (North) (Ed.): New line Hanover-Würzburg: Jühnde . Leporello as of October 1, 1984.

[ei-34-661-5] Belter: Great progress in building the tunnels for the new lines . In: Der Eisenbahningenieur , 34, 1983, issue 12, p. 661 f.

[bundesbahn-1983-24-6] Deutsche Bundesbahn, project group Hanover – Würzburg North of the railway construction center, Federal Railway Directorate Hanover: The new Hanover – Würzburg line. The Göttingen – Kassel section . Brochure (36 pages), October 1983, p. 24.

[db-1987-11-18-7] 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. 18.

[112-1986-338-8] H. Raab: Discussion about fire protection in tunnels . In: 112 - The magazine of the fire brigade , ISSN 0942-0134 , issue 7/1986, pp. 338–348.