Hirschhagen tunnel

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A44 Hirschhagen tunnel
Official name Hirschhagen tunnel
use Road tunnel
traffic connection Federal motorway 44
place near Hirschhagen
in the Fulda-Werra-Bergland ;
District of Kassel and Werra-Meißner district , Northern Hesse
length 4204 m (southwest
tube ), 4147 m (northeast tube)dep1
Number of tubes 2
construction
building-costs € 341 million
start of building June 9, 2013 ( tunnel stop )
completion probably 2020
business
release probably spring 2022Template: future / in 2 years
location
Hirschhagen Tunnel (Hesse)
Red pog.svg
Red pog.svg
Coordinates
Northwest portal 51 ° 14 ′ 5 "  N , 9 ° 40 ′ 17"  E
Southeast portal 51 ° 12 ′ 46 "  N , 9 ° 42 ′ 53"  E

The tunnel Hirschhagen is since 9 June 2013 in early construction road tunnel of the motorway 44 , which in northern Hesse in the fields of community Helsa in Kassel district and the city of Hessisch Lichtenau in Werra-Meissner created. The tunnel was named after the Hessisch Lichtenau district of Hirschhagen to the north of it . Its southwest tube is 4204  m and its northeast tube is 4147 m long.

The construction period was named as early as spring 2013 to 2018; later it was assumed that the tunnel should be completed on December 31, 2020. Spring 2022 is currently specified as the period for traffic opening Template: future / in 2 years.

After completion, the tunnel will replace the East Hessian tunnel Neuhof (1610 m; A 66 ) as the longest motorway tunnel in Hesse and after the Thuringian Rennsteig tunnel (7916 m; A 71 ) it will be the second longest motorway tunnel in Germany .

Geographical location

The Hirschhagen tunnel is located within the Fulda-Werra mountainous region in the Kaufunger Wald natural area (with Söhre ) - between Helsa and Hessisch Lichtenau .

Its north-west portal is located on Helsa territory near the district of Eschenstruth, south of the Helsa-Ost motorway junction, on the south-south -east flank of 527.8  m above sea level. NHN high Bielstein . Initially, the tunnel crosses under the Lossetal (near the sports field there), east of Eschenstruth at 301.5  m altitude, with the federal road 7 , the Lossetalbahn , the Eschenstruth– Waldhof road and the Losse .

The tunnel then runs in the Hessisch Lichtenau area between Hirschhagen in the northeast and Fürstenhagen in the southwest in the wooded southwest and southern flanks of the 535.6  m high Rohrberg . It crosses under the Hirschhagener Straße running between the villages and leads to its south -east portal located between Hessisch Lichtenau in the south and its remote location Föhren in the northeast.

Then the motorway leading through the tunnel between Fürstenhagen and Föhren will lead over the Steinbach valley bridge, followed by the Hessisch Lichtenau-West junction, which is already used by cars in and from the southeast .

Building description, history, costs

Federal motorway A44: construction site tunnel Hirschhagen, south-east portal

The Hirschhagen tunnel is part of the future extension of the A 44 from Kassel (planned motorway triangle Kassel-Ost ) on the A 7 to Herleshausen (planned AD  Herleshausen- Wommen ) on the A 4 . It also belongs to the 5.94  km long "VKE 12 -  AS  Helsa-Ost - AS Hessisch Lichtenau-West" (VKE = transport cost unit), the preparatory work on which began in June 2010.

In February 2007, the planning approval procedure was initiated for VKE 12 and its resolution was passed in spring 2010. The construction contract for the tunnel was signed on January 29, 2013. The costs for the construction project of the Helsa – Hessisch Lichtenau motorway section with the tunnel were estimated to be around € 247 million in 2013,  € 324 million was mentioned in 2017, and € 341 million has been mentioned since 2019.

After preliminary work, the tunnel was opened on June 9, 2013. By mid-2015, the tunnel construction workers had worked their way into the mountain about 2300 m from the north-west portal and about 1000 m from the south-east portal. The tunnel breakthrough was planned for the beginning of November 2015 . But the breakthrough of the southwest tube did not take place until February 19, 2016. The interior lining was completed in 2017; road construction work was scheduled to begin at the end of August of the same year.

The tunnel driving took place predominantly in layers of red sandstone . 60% of the tunnel was blasted out of the mountain, the rest was dredged. The excavation of both tunnel tubes resulted in a total of around 960,000 m³ of overburden, which was removed  with around 48,000 truck loads of around 30 t each  . The ridge cover, i.e. the distance between the tunnel and the earth's surface, reaches a maximum of around 85 m on the southern slope of the Rohrberg, and the point closest to the surface is around 10 m in the area of ​​the Losse crossing.

In accordance with the latest safety standards, the tunnel was given 2 tubes (south-west 4204  m ; north-east 4147 m), which are connected by 7 drivable and 8 accessible cross tunnels (a total of 15). In dangerous situations, they serve as escape routes into the other tube, which can then be closed to traffic, and rescue workers as access routes. The tunnel 14 has emergency bays (7 per 2-lane carriageway ). The tunnel tubes have two reinforced concrete shells: their outer shells are 40 cm thick, the inner shells about 80 cm; There is a waterproof film between the two shells. The tubes are each 11 m high and 12 m wide. Inside they are 6.5 m high, and the 2-lane directional lanes are 7.5 m wide per tube. The tubes were stabilized with around 164,000 m³ of concrete, and around 447,000 anchors and 8,000 t of structural steel were used for the outer shell and around 192,000 t of concrete and 14,500 t of structural steel for the inner shell.

The tunnel is ventilated lengthways with a total of 54  jet fans , and an approximately 80 m long exhaust air and smoke extraction shaft leads from the center of the tunnel to the surface of the earth, where an operating building is located.

Among the works within the tunnel were executed or should be, include, in addition to the constructions of the portal structures use and the relevant frontal and lateral support walls, including the excavation of the pit at the north west portal, secured with back-anchored bored pile walls and sheet piling , shoring of Excavation of an extinguishing water basin at the south-east portal and collecting basin at the north-west portal, the construction of a company building on each of the two portals and a 400 m long steep wall at the north-west portal as well as about 1000 m of sewer construction

All technical systems have been installed since 2019: power supply including lighting and ventilation as well as traffic, control, monitoring, security and fire protection technology. A total of 735 km of cables are expected to be pulled through conduits to the left and right of the tunnel carriageways. Fire alarms and emergency call systems are to be installed in tunnel wall niches at a distance of 150 m, and the emergency lighting should indicate the next possible escape route at a distance of 25 m. There should be a total of 66 hydrants in the tunnel  ; there, fire fighters should be able to draw a maximum of 1200 liters of water per minute for an hour.

Until the tunnel is open to traffic , traffic will run on the B 7, which will be roughly parallel to the future motorway route. The traffic load for the entire VKE 12 section is forecast at around "37,800 vehicles / 24  h " .

Individual evidence

  1. ↑ a b c d e Order announcement… VKE 12, Tunnel Hirschhagen… (No longer available online.) Formerly in the original ; accessed on October 31, 2019 .  ( Page no longer available , search in web archives )@1@ 2Template: Toter Link / ausschreiben-deutschland.de , accessed on February 27, 2013, from ausschreiben-deutschland.de
  2. ↑ a b c d e f A44-Tunnelbau Hirschhagen goes into the last phase , from September 21, 2019, accessed on October 31, 2019, on hna.de.
  3. ↑ a b c d Symbolic demolition: A44 tunnel chipped and blessed ( memento from September 29, 2015 in the web archive archive.today ), from June 9, 2013, from hr-online.de
  4. ↑ a b c d e f g h A44 tunnel Hirschhagen: Free travel only in 2020 , from July 18, 2017, accessed on July 21, 2017, on hna.de.
  5. ↑ a b c Article 247 million euro project: Hesse's longest road tunnel on hna.de from January 31, 2013, accessed on February 27, 2013
  6. ↑ Map services of the Federal Agency for Nature Conservation ( information )
  7. ↑ a b c d Hessen Mobil, Road and Traffic Management : VKE 12 - AS Helsa-Ost – AS Hessisch Lichtenau-West ( memento of April 5, 2013 in the Internet Archive ), accessed on February 27, 2013
  8. ↑ The rails sank: construction work on A44 tunnel takes longer (HNA), from June 29, 2015, accessed on January 11, 2015, on hna.de.
  9. ↑ Puncture at the A44 tunnel Hirschhagen , from February 19, 2016, accessed on August 23, 2016, on hna.de.
  10. ↑ Sketch of tunnel cross-section from individual evidence ... Free travel only in 2020 , from July 18, 2017, accessed on July 21, 2017, on hna.de.