Merklingen tunnel
| Merklingen tunnel | ||||
|---|---|---|---|---|
 View of the east portal (July 2020)
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| traffic connection | New Wendlingen – Ulm line | |||
| place | Merklingen | |||
| length | 394 m | |||
| Number of tubes | 1 | |||
| construction | ||||
| Client | Deutsche Bahn | |||
| business | ||||
| release | December 2022 (planned) | |||
| location | ||||
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| Coordinates | ||||
| West portal | 48 ° 31 '4 " N , 9 ° 45' 21" E | |||
| East portal | 48 ° 31 '4 " N , 9 ° 45' 39" E | |||
Map with all coordinates: The Merklingen tunnel is a completed, two-track and 394 m long railway tunnel on the new Wendlingen – Ulm line . It is located in the planning approval section 2.3 of the new line, between construction kilometers 58.9 and 59.2. The building permit for this section has been in place since November 2008.
Location and course
In the structure, the new line crosses under the Merklingen junction of the federal motorway 8 in the direction of Munich and the state road 1230.
Earthworks for the tunnel (November 2015)
Facing east (November 2015)
Tunnel construction site in June 2016
Section in front of the west portal (construction status July 2020)
There is a local gradient low point in the Marklingen tunnel . An underground rainwater retention basin was arranged at the west portal, from which water that accumulates by means of a lifting system is pumped to a rain clarification and seepage basin further west.
cross-section
The sole thickness is 1.30 m, the frame walls are 1.0 m wide and up to 7.55 m high. The ceiling is over 1.50 m high. All components were made of waterproof reinforced concrete of strength class C 35/45.
history
In 2015, the plan was to finish the tunnel in September 2017.
The construction contract for the section between Merklingen and Hohenstadt, to which the tunnel belongs, was awarded at the beginning of 2015 for around 87 million euros to a consortium of the construction companies Leonhard Weiss (in charge, Göppingen ) and Bauer Spezialtiefbau ( Schrobenhausen ). The building should be built using the open construction method. Roads are to be relocated temporarily as part of the construction work.
The construction work was largely based on the requirement to maintain road traffic at the motorway junction and the L 1230. On this basis, two construction phases were agreed in which the tunnel was built in sections.
For the first construction phase, the L 1230 was initially swiveled during the construction period and the specifications were adhered to via a catch dam made of two parallel bored pile walls. Another bored pile wall was built to protect the motorway access. After the state road had been swiveled, construction site clearance began in July 2015, followed by construction of the first tunnel section in 10 m long sections by May 2016, partly with excavation and partly with blasting. The excavation pit, which is up to 18 m deep, was demolished with an incline of up to 2: 1. The structural engineering of the 1st construction phase was completed in October 2016 and the state road was moved back over the completed tunnel section.
The 2nd construction phase then followed until September 2017.
In 2017, completion was planned for 2021. The shell of the tunnel has been completed (as of 2017).
Web links
Individual evidence
- ↑ a b Zeit rast: Assigned work for the route on Alb . In: Schwäbische Zeitung . February 13, 2015, p. 15 .
- ↑ a b New line: the next section is tough . In: Augsburger Allgemeine . February 12, 2015, p. 33 .
- ↑ Deutsche Bahn places another order on the new line . In: Südwest Presse . February 12, 2015, ZDB -ID 1360527-6 , p. 22 ( [1] ).
- ↑ a b c d e Stefan Kielbassa, Florian Schwarzbauer, Klaus Homberg: New Wendlingen – Ulm line: The railway systems at Merklingen . Ed .: Association of German Railway Engineers (= Railway Engineer Compendium ). DVV Media Group, 2019, ISBN 978-3-87154-624-2 , ISSN 0934-5930 , p. 169-191 .
- ↑ Next tunnel approaching, explosions again . In: Schwäbische Zeitung . July 13, 2015, p. 15 .
- ^ Germany-Stuttgart: Construction work for railway lines . Document 2015 / S 014-021807 of January 21, 2015 in the supplement to the Electronic Official Journal of the European Union.