Hemp garden tunnel

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Hemp garden tunnel
place Zellingen
length 411 m
Number of tubes 1
construction
start of building 1983
completion 1985
business
operator DB network
location
Hanfgartentunnel (Bavaria)
Red pog.svg
Red pog.svg
Coordinates
North portal 49 ° 55 ′ 5 "  N , 9 ° 44 ′ 38"  E
South portal 49 ° 54'55 "  N , 9 ° 44'52"  E

The Hanfgartentunnel is a 411 m long railway tunnel on the high-speed line from Hanover to Würzburg . It is located northwest of the Lower Franconian market in Zellingen , northwest of Würzburg .

The construction costs according to the accounts (excluding VAT) amounted to 14.1 million D-Marks (around 7.2 million euros ; price as of 1985).

course

The tunnel runs in a north-south direction. The route runs in a straight line in the tunnel. The gradient rises briefly at 1.5 per mille at the north portal and then drops continuously at 12.5 per mille towards the south portal.

At the north portal (construction km 291.328) the upper edge of the rail is at a height of 296.496  m above sea level. NN , at the south portal (construction km 291.739) of 292.128 m. The overburden (over the mountain ridge ) is up to 27 m, at the portals between 10 and 15 m.

To the south of the tunnel, after a short cut, the Hohe Wart tunnel joins.

geology

The tunnel lies in solid rock of the Upper Muschelkalk . About 18 to 20 m below the tunnel there are layers of the Middle Muschelkalk and, with gypsum leaching, influences the mountains above.

planning

In the planning status from the end of 1977, an incision was planned in place of the current tunnel. No tunnel was planned in autumn 1981 either.

The tunnel, together with a 546 m long pre-cut in the north and a 50 m pre-cut in the south, formed lot 2 of a 2,500 m long construction section (construction km 290.800 to 293.300), which also included the neighboring Hohe Wart tunnel. The section was awarded on September 23, 1983 for an order value of 50,174,800 German marks (around 25.7 million euros ; price as of 1983).

At the end of March 1982, the municipality of Himmelstadt , over whose territory the route in the area of ​​the tunnel runs for 1.7 km, approved the planning approval section without dissenting votes.

In the planning and construction phase, the tunnel, together with the neighboring Hohe Wart tunnel, was also referred to as Object 32 . At the beginning of 1982 a length of 380 m was planned for the tunnel, at the end of 1983 it was estimated at 376 m.

construction

Construction began on October 24, 1983 in the southern pre-cut of the tunnel, in which the construction site for the two tunnels of the construction section had also been set up. Driving from south to north began on March 8, 1984.

The tunnel was ceremonially erected on May 11, 1984.

The cap was on 19 June 1984 by defeated , the bench on July 18 the same year. From August 27 to September 5, the two tunnels constructed in the construction phase were examined. Construction work was completed on September 27, 1985, and the tunnel was formally accepted on October 8 . The tunnel sponsorship had Christa Elisabeth Berg accepted.

The excavated cross-section was between 108 and 143 m², the usable cross-section between 81 and 99 m². The maximum excavation height (base - apex ) was 11.60 m, the tunnel height ( upper edge of the rail - apex) was 7.78 m. A total of 42,000 m³ of rock was excavated, and 376,900 m³ of material was removed for the cuts and pre-cuts. The excess masses (600,000 m³) were deposited on a landfill near Rohrbach ; the mean transport distance was 8.0 km. Since the mountain water level was below the tunnel floor, only a maximum of 0.5 l of tunnel water per second was generated during the construction phase .

2,610 m³ of shotcrete was used for the outer vault and 7,125 m³ of concrete for the inner and base vault . A total of 154 t of steel was used to reinforce the inner shell and the portals.

The ARGE Hanfgarten- und Hohe-Wart-Tunnel , which consisted of three companies, was commissioned with the construction .

Individual evidence

  1. ↑ a b c d e f g h i j k l Working group "Tunnel Hainrode-Süd, Mühlbach and Schmitteberg": tunnel construction. Driving, expansion, equipment and costs . Frohnweiler Druck-Gesellschaft, Innsbruck, 1989, pp. 40-43
  2. ^ Helmut Maak : The draft of the new Hanover - Würzburg line, section of the Hessian / Bavarian border - Würzburg . In: Die Bundesbahn , year 53 (1977), issue 12, pp. 883-893, ISSN  0007-5876
  3. ^ Helmut Maak: New Hanover – Würzburg line, start of construction in the southern section . In: The Federal Railroad . Vol. 57, No. 10, 1981, ISSN  0007-5876 , pp. 801-806.
  4. ↑ a b Councilors of Himmelstadt say yes to the railway line . In: Main-Post Würzburg, March 30, 1982
  5. ↑ Deutsche Bundesbahn, Federal Railway Directorate Nuremberg, Project Group H / W South of the Bahnbauzentrale (publisher): New line Hanover - Würzburg: Mühlberg Tunnel I. Driving, expansion, equipment and costs. Brochure, September 1983, 34 pp., 25
  6. ↑ Belter: Great progress in building the tunnels for the new lines . In: Der Eisenbahningenieur , 34, 1983, issue 12, p. 661 f.

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