Bleßberg tunnel

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Bleßberg tunnel
Blessberg tunnel
Bleßberg tunnel
North portal and Saubach Bridge
use double-track railway tunnel
traffic connection High-speed line from Nuremberg to Erfurt
place Bleßberg
length 8325.8 mdep1
Number of tubes 1
cross-section 92 m²
Largest coverage 330 m
construction
start of building 4th December 2006
completion 2014 (shell)
business
operator DB network
location
Bleßberg Tunnel (Thuringia)
Red pog.svg
Red pog.svg
Coordinates
North portal 50 ° 29 ′ 54 "  N , 10 ° 59 ′ 45"  E
South portal 50 ° 25 ′ 30 ″  N , 11 ° 1 ′ 15 ″  E

The Bleßberg tunnel (or Blessberg tunnel ) is the longest of 22 railway tunnels on the new Ebensfeld – Erfurt line . The tunnel crosses under the main ridge of the High Thuringian Slate Mountains with the Rennsteig between Truckenthal and Goldisthal . It is named after the 865 m high Bleßberg , under which the tunnel runs just east of the summit. With a length of 8,325.8 m ( route kilometers 124.745 to 133.071) it will be one of the ten longest railway tunnels in Germany after its completion .

The cost of the structure was given by Deutsche Bahn in mid-2011 at around 180 million euros.

course

The south portal is 502.4 m above sea level, the north portal at a height of 593.2 m above sea level. The gradient rises continuously in the tunnel towards the north portal by 1.0916%. The overburden is between 6 m and 330 m.

In addition to the Bleßberg (862 m), the structure also crosses the Rennsteig near the Pechleite (838.5 m).

  • South portal (2018) with side openings to avoid the tunnel bang

  • North portal with upstream Saubach Bridge (2018)

technology

The railway tunnel has a clear height of 8.23 ​​m from the top edge of the rail and a clear width of 13.64 m with a mouth profile with a usable cross-sectional area of ​​92 m² above the top edge of the rail. A slab track is available as the superstructure , the track spacing is 4.5 m at a design speed of 300 km / h.

As a measure against the tunnel bang , additional portal structures were built. The 31 m long southern portal structure was put out to tender in 2012. The construction of such a structure was awarded in November 2012 and completed in 2013.

geology

The tunnel crosses the Thuringian Slate Mountains in the core area of ​​the Schwarzburger Saddle (see internal structure of the Thuringian-Franconian-Vogtland Slate Mountains ). The tunnel tube thus runs largely in the neoproterozoic clay slates and graywackes of the Frohnberg and Großbreitenbach Formations as well as in Ordovician clay slates and cement quartzites of the Lower and Upper Frauenbach quartzites , the intervening Frauenbach alternating layers and the Phycodes layers. Near the southern portal, the tunnel penetrates the so-called Franconian Line and runs a few hundred meters in the Middle Triassic limestones of the Lower Muschelkalk .

history

planning

The structure with a length of 8,314 m was planned as early as 1999.

Construction work

South portal after the calotte breached in June 2008
South portal August 2008, assembly of the formwork carriage

The double-shell tunnel was excavated with an excavated cross-section area of ​​126 m² using blasting and a cross-section subdivided into a calotte, bench and bottom . It was secured using shotcrete using the new Austrian tunnel construction method . The tunnel drive ran continuously around the clock with four blasts per day. The excavation of the tunnel in the first two construction lots was around 900,000 m³ and was stored on a 32.5 ha large and maximum 14 m high landfill near stilts ( 50 ° 26 ′ 20 ″  N , 10 ° 59 ′ 26 ″  E ). The excavated mass of the cut in front of the south portal was temporarily stored above the south portal and finally installed at the beginning of 2014 on the Galgenberg landfill ( 50 ° 25 ′ 2 ″  N , 11 ° 1 ′ 32 ″  E ). The landfill for the excavated mass of the third construction lot was at Masserberg ( 50 ° 31 ′ 38 ″  N , 10 ° 59 ′ 9 ″  E ). The tunnel was built in three construction lots. The first construction lot comprised the construction of the 965 m long cross tunnel. This was driven in one year until August 2006 and served as an intermediate access tunnel. The costs amounted to around five million euros and the excavated volume was around 55,000 m³.

The second construction lot included the 4643 m long southern part of the tunnel with the intermediate access gallery as the main access point. This was awarded in August 2006 for around 63.2 million euros net. The construction site was cleared in spring 2011. The third construction lot comprised the 3671 m long northern tunnel section as well as the adjoining Goldberg tunnel including two valley bridges and was awarded for 138.8 million euros net. The railway anticipated a total construction time of seven years.

The tunnel was officially opened on December 4, 2006. The SPD politician Iris Gleicke took over the sponsorship of the southern section, and accordingly the tube is also known as the Iris tunnel .

By mid-July 2007, 800 m had broken out. 1.7 to 2.2 m were broken out per blast. Around 160 people worked on the construction site in two shifts around the clock, with one more shift free. 16 to 20 people were underground per shift. At the beginning of November 2007, over two kilometers of the driving tunnel had been excavated and four of the eight emergency exits were under construction.

On March 30, 2008, the miners came across a stalactite cave around 240 m from the south portal , which was given the name Bleßberg cave . Another karst cave was discovered 60 m before the breakthrough at the south portal. On June 3, 2008, experts examined this cave running vertically to the tunnel tube, which was then closed due to its poor stability. The main cave was to be reopened for exploration in January 2009 during a 14-day construction break and then permanently closed. At its highest point, the main cave is about ten meters below the tunnel. At the intersection between the railway tunnel and the cave, the tunnel was deepened down to the lower level of the cave in order to create a stable foundation. Over a length of around 500 m in the area of ​​the cave, the tunnel shell was also made round in the area of ​​the base. In addition, the floor in the area where the cave is crossed was reinforced with stone and concrete.

The tunnel breakthrough in the calotte on the south portal took place after 14 months of construction on June 14, 2008. The official breakthrough at the south portal took place on June 24th. Around 12:45 p.m., the tunnel godmother triggered a symbolic demolition. A total of 70 million euros were invested in the first 4.6 km long construction phase. A consortium of three companies was commissioned to realize the southern section .

The Goldberg Tunnel (1163 m) to the north and the Saubach Valley Bridge (55 m) have served as access to the construction site at the north portal of the Bleßberg Tunnel since their completion (shell construction). The approximately 4000 m long northern section was struck on July 8, 2009. In mid-March 2010, more than 1050 meters of the northern section had been driven and the tunnel shell of the southern section was completed at the end of March. On September 2, 2010, 2,296.5 meters of the northern section had been driven. On May 31, 2011, the cap broke through and the official celebration followed on June 29, 2011 at the south portal.

In total, more than 20 kilometers of construction roads were built, some of which were dismantled after the construction work was completed, and some of which remained as access to the rescue stations.

In May 2015, the rails were completely installed and the installation of the contact wire was in progress.

In addition to the Silberberg tunnel , the structure was considered to be the determining factor for the construction of the new line. Project management is the DB ProjektBau .

Rescue concept

The structure has eight emergency exits at a maximum distance of 1000 m.

  • Emergency exit 1 at km 125.756 is a 410 m long two-lane drivable sloping tunnel with 38 m² excavated cross-section, which is located on the west side near Neundorf ( 50 ° 25 ′ 55.8 ″  N , 11 ° 0 ′ 41.5 ″  E )
  • Emergency exit 2 at km 126.756 is designed as a 965 m long inclined tunnel, also on the west side. This tunnel with an excavated cross-section of 38 m² served as a point of attack for the construction of the southern section and is therefore accessible on two lanes. It lies between Stelzen and Mausendorf. ( 50 ° 26 ′ 21.7 ″  N , 10 ° 59 ′ 54.5 ″  E )
  • Emergency exit 3 at km 127.570 is connected to NA 2 via an 814 m long single-lane drivable parallel tunnel with a 28 m² excavated cross-section. He has three alternative niches.
  • Emergency exit 4 at kilometer 128.570 is a 43 m deep shaft on the east side of the tunnel near Saargrund on the B 281 ( 50 ° 27 ′ 28.5 ″  N , 11 ° 0 ′ 13 ″  E )
  • Emergency exits 5 (km 129.570), 6 (km 130.395) and 7 (km 131.220) are connected to the NA 8 via a 2,500 m long, passable parallel tunnel.
  • Emergency exit 8 at route kilometers 132.070 is arranged as a 308.5 m long gallery on the east side of the tunnel. This tunnel, also known as the Langebach intermediate attack tunnel, is located to the west of the lower basin of the Goldisthal pumped storage plant ( 50 ° 29 '27 "  N , 11 ° 0' 1"  E ). Access is via a 7 km long forest path from Goldisthal.

Overall, inclined and parallel tunnels with a total length of 4477 m were created. The longest of these tunnels is 3 km long and has bays for oncoming traffic. The slab track and the tunnels can be driven over by road vehicles. There are turning points in the tunnel every 100 m. A dry extinguishing water pipe with underground extinguishing water tanks is available at the tunnel portals.

Rescue stations have been set up at both portals and at the points where the emergency exits come to the surface. They also serve as a landing point for helicopters. The Saubachtal Bridge is accessible for road vehicles as the access to the north portal.

As part of the seventh change to the plan, for safety reasons, a ventilation shaft with a height of around 63 m and an outer diameter of around 2.6 m was also built at emergency exit 5 to ventilate the emergency exits. The construction of the structure was put out to tender at the end of January 2016 and will be completed by the end of 2017.

  • Portal emergency exit 1

  • Portal emergency exit 2

  • Shaft structure emergency exit 4,

  • Emergency exit 8

  • Ventilation shaft building

On April 29, 2017, a rescue exercise with 350 firefighters took place at six stations in the tunnel.

Another rescue exercise took place on July 22, 2017, in which 700 emergency services from all 27 tunnel base units responsible for the construction section were involved.

On February 28, 2019, the Federal Administrative Court decided on lawsuits from the state of Thuringia and the districts of Sonneberg and Ilmkreis on the size of various rescue areas along the route. The complaint regarding the rescue area at emergency exit 8 of the Bleßberg tunnel was justified because the access to the rescue area through the Thuringian Forest via developed forest paths with a length of over seven kilometers is particularly long and technically extremely demanding. In addition, the required oncoming traffic is only possible with passing points and a passage to the rescue area at the north portal of the tunnel must be kept free. As a result, there are exceptional circumstances that may require a rescue area larger than 1500 square meters. The Federal Railway Authority had not carried out such an examination of the extraordinary circumstances when the plan was approved.

See also

Web links

Commons : Tunnel Bleßberg  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b c d e f g h i j New Ebensfeld – Erfurt line: Section Bleißberg Tunnel. December 2011. (PDF, 5 MB)
  2. ↑ Thuringian state administration: Plan approval procedure for the construction measure of DB Netz AG: New line, PFA 2.12 Thuringian Forest, 7th change of plan and initial planning here 1st change of plan . New route Ebensfeld-Erfurt PA 3 * BA 2.12 Thuringian Forest, overview map km 47.4 + 00 - 51.6 + 50, Appendix No. 1, Sheet 4, February 27, 2015
  3. ↑ a b c d e f g h i j Schüßler map: Route brochure for the new VDE 8.1 line from Breitengüßbach to Erfurt. Published by DB Netz AG Regional Area Southeast. As of June 1, 2017. p. 155  ( page no longer available , search in web archives )@1@ 2Template: Dead Link / fahrweg.dbnetze.com
  4. ↑ Seven meters per day through the Thuringian Forest . In: Thüringische Landeszeitung , July 9, 2011, p. 10.
  5. ↑ a b Wolfgang Ellinger: Specialized excursion Blessberg tunnel: ICE –Train Thuringian Forest. (PDF; 512 kB) In: VDI Information 3/2007, p. 18 f.
  6. ↑ Planungsgesellschaft Bahnbau Deutsche Einheit mbH (ed.): A new railway for Thuringia, Germany and Europe. The new railway line from Ebensfeld to Erfurt . Erfurt, April 1996, p. 10.
  7. ↑ German Bundestag: The Federal Government's response to the minor question from MPs Dr. Anton Hofreiter, Dr. Valerie Wilms, Sven-Christian Kindler, other MPs and the parliamentary group ALLIANCE 90 / THE GREENS (PDF; 89 kB) Printed matter 17/8213 - Cost increases in ongoing rail requirement plans. Printed matter 17/8287 of November 30, 2011.
  8. ^ D-Erfurt: tunnel construction work . Document 2012 / S 148-247801 of August 3, 2012 in the supplement to the Electronic Official Journal of the European Union .
  9. ^ D-Erfurt: tunnel construction work . Document S 230-378470 of November 29, 2012 in the supplement to the Electronic Official Journal of the European Union .
  10. ↑ Heinz-Dietrich Könnings, Max John: Construction of the longest railway tunnel in Germany for the NBS between Erfurt and Munich . In: Tunnel technology for future tasks in Europe . Balekma-Verlag, Rotterdam 1999, ISBN 90-5809-051-5 , pp. 83-95.
  11. ^ A b c Deutsche Bahn AG: breakthrough south at the Bleßberg tunnel in Thuringia . Press release from June 24, 2008.
  12. ↑ a b www.bickhardt-bau.de: References in railway construction. ( Memento from December 10, 2010 in the Internet Archive )
  13. ↑ a b c A quick visit to beer and sausages. In: Free Word. dated August 3, 2007.
  14. ↑ A long Lulatsch. In: New Press Coburg. dated July 12, 2007.
  15. ↑ a b There is ammonia in the air in tunnel number 3. In: Free Word , November 7, 2007.
  16. ↑ Deutsche Bahn AG (Ed.): Another karst cavity found during the construction of the Bleßberg tunnel on the new Ebensfeld – Erfurt line . Press release from June 5, 2008.
  17. ^ Researchers angry: Bahn closes Bleßberg cave. In: Free Word. October 9, 2008.
  18. ↑ Deutsche Bahn AG (Ed.): Cave found during the construction of the Bleßberg tunnel is crossed . Press release from January 14, 2009.
  19. ↑ Tunnel gets a face. In: Free Word. February 28, 2009.
  20. ↑ Three blows and an excavator: The tunnel now sees light. In: Free Word. June 25, 2008.
  21. ↑ a b Friedrich List: The “Unfinished” is still being built. In: Railway courier . No. 11, 2008, pp. 40-45
  22. ^ Deutsche Bahn AG: breakthrough and stop for two tunnels on the new railway line Ebensfeld – Erfurt in Thuringia . Press release from July 8, 2009.
  23. ↑ About tunnel builders, drillers and a saint. In: Free Word . (Online edition), March 13, 2010.
  24. ^ Deutsche Bahn AG: Breakthrough of the Bleßberg tunnel marks a milestone on the high-speed line Nuremberg-Berlin . Press release from June 29, 2011.
  25. ↑ Bernd Jentsch: Bleßberg tunnel in the Thuringian Forest knocked through . In: Thüringer Allgemeine , June 30, 2011.
  26. ↑ a b Kai Mudra: Every time there is an alarm in ICE tunnels, 700 rescuers deploy . In: Thuringian General . May 7, 2015, p. 9 ( online under a similar title ).
  27. ↑ German Bundestag: The Federal Government's response to the minor question from MPs Dr. Anton Hofreiter, Bettina Herlitzius, Winfried Hermann, other MPs and the Bündnis90 / Die Grünen parliamentary group. (PDF; 74 kB) Print 16/13787 from July 14, 2009.
  28. ↑ Tunnel construction sign  ( page no longer available , search in web archives ) (PDF; 68 kB).@1@ 2Template: Toter Link / www.tunnel-blessberg.de
  29. ↑ a b c Tunnel Bleßberg Lot 2 South ( Memento from January 2, 2014 in the Internet Archive )
  30. ↑ a b Sebastian Haak: Save yourself if you can! In: Thuringian General . May 19, 2015, p. 3 (including title online ).
  31. ↑ Mammoth project on the home stretch . In: New Press . December 9, 2016, p. 15 ( online ).
  32. ↑ Thuringian state administration: Plan approval procedure for the construction measure of DB Netz AG: New line, PFA 2.12 Thuringian Forest, 7th change of plan and initial planning here 1st change of plan . 1. Change of plan BA 3212 Annex directory, expansion of rescue areas, access roads explanatory report
  33. ↑ Germany-Erfurt: Construction work for bridges, tunnels, shafts and underpasses. Document 2016 / S 021-033967. In: Supplement to the Electronic Official Journal of the European Union . January 30, 2016, accessed April 22, 2016 .
  34. ↑ Kai Mudra: After a large-scale exercise: Around 1200 firefighters trained for use in the ICE tunnel. In: otz.de. April 29, 2017. Retrieved May 1, 2017 .
  35. ↑ 35 passengers rescued from the ICE - major exercise in the Bleßberg tunnel. In: ta.de. July 22, 2017. Retrieved July 23, 2017 .
  36. ↑ Federal Administrative Court: ICE-Trasse Ebensfeld - Erfurt: The Federal Railway Authority has to make a new decision on the rescue area at the Blessberg tunnel . Press release No. 16/2019 from February 28, 2019

Remarks

  1. ↑ a b Due to the additional portal structures, the tunnel length has increased from 8314 m to 8326 m. The portal signs indicate 8314 m.