Altengronauer Forst tunnel

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Altengronauer Forst tunnel
Altengronauer Forest Tunnel
Altengronauer Forst tunnel
View of the south portal of the tunnel, which was completed in the shell
place Altengronau
length 2353 mdep1
Number of tubes 1
Largest coverage 120 m
construction
Client German Federal Railroad
building-costs 61 million German marks
start of building May 1981
completion circa 1983
planner Engineering community Lässer-Felzimayr
business
operator DB network
release 1988
Coordinates
Tunnel portal north 50 ° 15 '25 "  N , 9 ° 38' 55"  E
Tunnel portal south 50 ° 14 '16 "  N , 9 ° 38' 5"  E

The Altengronauer Forst Tunnel (also Altengronauer-Forst-Tunnel or Altengronau-Tunnel ) is a 2353 m long railway tunnel on the high-speed line Hanover – Würzburg . It is located southeast of the Altengronau part of the Hessian community Sinntal and therefore bears his name. The state border between Hesse and Bavaria runs roughly in the middle of the tunnel . The structure is thus the southernmost tunnel in Hessen and the northernmost in Bavaria on the high-speed route.

course

The tunnel tube runs in a south-westerly direction.

The tube passes under the 400 m high stone head.

The route runs up to construction kilometer 252.528 in a right-hand curve of 7,000 m radius, which is followed by a transition curve up to km 252.843. The rest of the way the tunnel is in a straight line. The north portal is 260  m above sea level. NN , the south portal at a height of 276 m. The longitudinal slope is 8.33 and 12.00 per mille. (In the construction phase, the tunnel was between construction kilometers 251.457 and 253.790.) The overburden is up to around 120 m.

The tunnel cuts through Hessian territory in a short section near Jossa. The Bavarian-Hessian state border runs in a dragging cut in the area of ​​the tunnel and cuts it at construction kilometers 254.5. It is located at the south portal about 300 m east of the route.

To the south there is an incision up to the Dittenbrunn hillside bridge , in which the Roßbacher Forest Tunnel is also located, to the north the Zeitlofs Sinntal bridge follows . The Altengronauer Forst transfer point is located in the area of ​​the south portal of the Altengronauer Forest Tunnel and in the Roßbacher Forest Tunnel .

The tube mainly crosses layers of the lower and middle red sandstone .

history

planning

The tunnel was in the area of ​​the south planning group of the new line.

The tunnel was lengthened compared to the original plan. At the end of 1977 a length of 2354 m was planned for the structure. While the route (right-hand bend, straight line) corresponded to the building that was realized later, the planned gradient of 9.23 per mille, which should merge into a gradient of 12.00 per mille towards the south portal, deviated from the later realized design. According to the planning status of 1981, a length of 2330 m was planned for the structure, according to the status of 1983 a length of 2333 m.

construction

The building contract was given orally on June 3, 1981. June 22, 1981 was set as the beginning of the work. A working group of the companies Mayreder , Kraus & Co , Beton- und Monierbau , Dyckerhoff & Widmann , E. Heitkamp and Wix & Liesenhoff was commissioned .

The construction work began on June 22, 1981. (Another source speaks of a start of construction in May 1981.) The tunnel godmother Lore Linkeränger, the wife of the then head of the Frankfurt Railway Construction Center , triggered the first blast at the south portal at the beginning of October 1981. The tunnel was driven from both sides using the shotcrete method. A pure blasting drive was driven from the south, and a combined blasting and milling drive from the north.

The construction of the tunnel was estimated at 61 million D-Marks (around 31 million euros ). A total of around half a million cubic meters of red sandstone was excavated during the drive. The construction time was 34 months. In order to avoid high embankments, the adjacent Roßbacher Forst tunnel to the south was extended. Part of the tunnel excavation was used in a subsequent dam. During the construction phase, 580,000 cubic meters of overburden were produced. An excavated cross-section between 101 and 145 m² was created. The construction phase went without any major accidents.

The tunnel was cut 1,800 m north of the south portal on March 1, 1983. After a 1.7-kilometer march through the tunnel, the tunnel sponsor started a machine with which the canopy was broken. The breakthrough occurred two months earlier than originally planned.

It was the fifth tunnel on the new line to be penetrated. At this point in time, nine more tunnels in the southern section had been awarded or were under construction and two more (the tunnel once mountain tunnel and Dittenbrunner Höhe) had already been completed.

technology

There are four pre-signals and four block markings in the tunnel .

literature

  • Altengronauer Forst railway tunnel . In: Tunnel , issue 2/1982, pp. 84–94.

Web links

Commons : Altengronauer-Forst-Tunnel  - Collection of pictures, videos and audio files

Individual evidence

  1. ^ A b c d e Werner Möhrke: The "Altengronauer Forst" railway tunnel . In: Mayreder Zeitschrift , Volume 27, June 1982
  2. ↑ a b Klaus-Dieter Schwendener: Part renewal 97080 WRSTW SFS 1733 in the RB Süd G016180176. (PDF) DB Netz AG, July 25, 2019, p. 9 , retrieved on December 10, 2019 (file Annex 15 BAst_Teilernlassung Stw 1733.pdf in ZIP archive 19FEI40778_Vergabeunterlagen_Zwischenstand.zip ).
  3. ^ A b 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
  4. ↑ a b c d e Expansion is making progress . In: Nürnberger Zeitung , March 2, 1983
  5. ↑ a b Deutsche Bundesbahn, Federal Railway Directorate Nuremberg, Project Group Hanover – Würzburg South of the Bahnbauzentrale (publisher): New Hanover – Würzburg line. The southern section Fulda – Würzburg , brochure (40 pages), April 1986, page 23
  6. ↑ a b c Joachim Seyferth: The new lines of the German Federal Railroad ( rail- book 1) . Josey-Verlag, Wiesbaden 1983, ISBN 3-926-66900-4 , p. 39.
  7. ↑ a b c d e Friedrich Karl Blindow: Driving methods in the Altengronauer forest tunnel . In: Deilmann-Haniel GmbH (Hrsg.): Our company: company magazine for the companies of the Deilmann-Haniel Group , No. 34, August 1983, Dortmund, p. 25 f.
  8. ^ 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.
  9. ↑ Belter: Tunneling in quick succession . In: Der Eisenbahningenieur , 34 (1983), Heft 1, p. 37
  10. ↑ DB new line made further progress . In: Brückenauer Anzeiger , March 2, 1983
  11. ↑ Deutsche Bundesbahn, Project Group H / W South of the Bahnbauzentrale (Ed.): Implementation status in the southern section of the new Hanover - Würzburg line (status: December 1983). Press release (two pages), Nuremberg, 1983 (?), Two A4 pages
  12. ↑ The 2333-meter tunnel is breakthrough today . In: Main-Echo Gemünden , March 1, 1983
  13. ↑ From Hesse to Bavaria by a 2,333-meter-long tube ... . In: Main-Echo Aschaffenburg , March 3, 1983