Dark Valley Bridge
Coordinates: 50 ° 30 ′ 52 ″ N , 10 ° 59 ′ 38 ″ E
| Dark Valley Bridge | ||
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High- speed line from Nuremberg to Erfurt |
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| place | Goldisthal | |
| construction | Arch bridge | |
| overall length | 291 m | |
| width | 14.1 m | |
| Longest span | 141 m | |
| Construction height | 2.7 m | |
| height | 65 m | |
| start of building | 2010 | |
| completion | 2013 | |
| location | ||
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The Dunkeltalbrücke is a 291 m long double-track railway overpass structure on the new Ebensfeld – Erfurt line , which is located between the Grubental Bridge and the Rehberg Tunnel , in the immediate vicinity of the highest point of the line. The bridge is located in southern Thuringia west of Goldisthal and spans the deeply cut Dark Valley with an arch of 141 m span with its symmetrical, approximately 30 ° steep valley flanks. The Lauterborn and a forestry path run in the valley floor. The route lies at a maximum height of 65 m above the valley floor and is straight in the structural area at a design speed of 300 km / h. The bridge has a slab track with a distance of 4.5 m between the tracks and a noise protection wall on the eastern side .
The structure lies between the route kilometers 134.779 and 135.070 of the new line.
history
Together with the Masserberg and Rehberg tunnels and the Rehtalbrücke, the bridge is part of the 2.3 km long construction section 3212 ( Southern Thuringian Forest ), which was commissioned in January 2010 with an award of € 70 million. The arch was completed in December 2011.
The road slab of the last superstructure section was concreted on September 11, 2012. This was done from the center of the arch to the right and left at the same time. The structure was completed as the penultimate of the 17 bridges on the route in the Thuringian Forest.
The shell of the bridge was completed at the end of 2013.
construction
The 291 m long superstructure has the cross-sectional shape of a single-cell reinforced concrete hollow box with inclined webs, prestressed in the longitudinal direction . In addition, the deck is prestressed in the transverse direction. The maximum width of the superstructure is 14.1 m. The construction height is 2.7 m, the construction height 3.635 m. To the south and north of the arch there are three single- span girders with 25 m span, the horizontal fixed bearings of which lie lengthways on the two abutment pillars. Above the arch there is a continuous girder with seven openings, each with a span of around 20 m and a horizontal fixed bearing in the longitudinal direction across the center of the arch. The superstructure has no rail extensions .
The construction of the superstructure was carried out from both abutments towards the center of the bridge, field by field on shoring. In each cycle, first the lower trough cross-section and then the upper deck slab was concreted.
The pillar of the bridge have a rectangular reinforced concrete hollow cross section and taper to a suit of 70: 1 upwards. The dimensions at the pier head are 2.7 m × 5.8 m (width × depth). The six uprights on the arch also have hollow cross-sections. Their dimensions are constant 1.75 m × 4.6 m.
The reinforced concrete arch with 141 m span and a pitch of 33.9 m is continuously curved in a parabolic shape. It has a hollow cross-section with variable dimensions, 4.20 m × 6.85 m on the transom and 3.2 m × 5.8 m in the apex. It was made on a temporary falsework supported by five scaffolding towers . The scaffolding towers, which were spaced at most 17.5 m apart, had a base area of 8.0 m × 6.0 m. They were between 14 m and 52 m high. The concrete surface of the floor slab was compacted with hydraulically controlled leveling and smoothing rollers, which made it possible to dispense with cover formwork.
A total of around 7400 m³ of concrete, 1300 t of concrete and 145 t of prestressing steel were used.
Construction stages
March 2011
July 2011
October 2011
December 2011
July 2012
literature
- Udo Wiegand, Daniela Hermsdorff: The Dunkeltalbrücke in the Thuringian Forest - part of VDE 8 as part of the new Ebensfeld-Erfurt line. In: Proceedings 22nd Dresden Bridge Construction Symposium. Dresden 2012, ISBN 978-3-86780-240-6 , pp. 121-132.
- W. Heine, H.-J. Jonas, M. Kästner, E. Lederhofer, R. Wiest: ICE route Nuremberg – Erfurt. Arch bridges over the valleys of the Thuringian Forest . In: civil engineer . No. 3/2015 . Springer-VDI-Verlag, March 2015, ISSN 0005-6650 , p. 104-114 .
Web links
- Southern Thuringian Forest Brochure on vde8.de (PDF file; 3 MB)
- Pictures of the construction site on bastellen-doku.info
Individual evidence
- ↑ a b Schüßler plan: Route brochure for the new VDE 8.1 line from Breitengüßbach to Erfurt. Published by DB Netz AG Regional Area Southeast. As of June 1st, 2017. p. 108 ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Ed. Züblin AG (publisher): Züblin receives a EUR 70 million order for a section of the new Ebensfeld – Erfurt line . Press release from January 29, 2010.
- ↑ a b The penultimate bridge of the ICE route near Goldisthal completed . In: Thüringer Allgemeine , September 11, 2012.
