Aurachtalbrücke Emskirchen
Coordinates: 49 ° 33 ′ 12 ″ N , 10 ° 43 ′ 21 ″ E
| Aurachtalbrücke Emskirchen | ||
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| Convicted | Nuremberg – Würzburg railway line | |
| Subjugated | Mittlere Aurach , Staatsstrasse 2244 | |
| construction | Frame bridge | |
| overall length | 527.5 m | |
| width | 11.5 m | |
| Longest span | 48.5 m | |
| height | 40 m | |
| start of building | 2013 | |
| opening | November 26, 2016 | |
| location | ||
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The Aurachtalbrücke Emskirchen is a double-track railway overpass on the Nuremberg – Würzburg railway line near Emskirchen . The first bridge went into operation in 1865 and was fitted with new steel superstructures in 1936. On November 26, 2016, a 527.5 m long prestressed concrete bridge followed as a replacement , which as a frame construction only has an expansion joint and bearings on one abutment .
course
The existing Aurachtalbrücke railway overpass is at 22.864 kilometers of the 5910 Fürth – Würzburg railway line between the Hagenbüchach and Emskirchen stations and spans the Middle Aurach , among other things . The new track body lies between the route kilometers 21.790 to 24.544.
The bridge is passable at 140 km / h.
history
To cross the valley of the Middle Aurach near Emskirchen on the railway line from Fürth to Würzburg, dams up to 40 m high and a bridge in the area of the river crossing were built. The bridge structure with two central pillars and three openings was built from 1862 to 1865. The abutments and pillars were built by the Erlangen building contractor Konrad Kronberger, while the iron superstructures were supplied by the Nuremberg ironworks Klett & Co as Pauli girders at 192,000 guilders . With a height of 37.5 m, it was the tallest bridge in Bavaria for a long time. In 1936 the bridge superstructure from the 1860s was replaced by a 130 m long steel beam structure. In the Second World War it was destroyed and rebuilt with 3.7 m high web plates.
Due to difficult subsoil conditions, the dams in particular had to be extensively renovated and stabilized over and over again. This problem, the goal of increasing the permissible line speed to 110 km / h and the high noise emissions - around 60,000 trains crossed the bridge in 2012 - led to the planning of a new, improved route over a length of 1.75 km east of the existing line at 35 million euros.
The planning phase was preceded by a prequalification in which a total of 20 offices or working groups were selected. In a first step, they developed rough concepts including textual explanations in a competition for the new replacement building. In the next step, five participants were selected for detailed preliminary planning. The planning of the Berlin planning office SSF Ingenieure, an approximately 530 m long girder bridge similar to the Scherkondetal bridge , was finally implemented in the draft planning from 2010 to the end of 2012.
The construction work was put out to tender at the end of April 2013. On October 29, 2013, the award of the construction contract to Max Bögl with a volume of 22.7 million euros (net) was announced. Eight companies applied for the construction contract, which, in addition to the replacement of the Aurachtal Bridge, includes, among other things, the dismantling of the existing structure, the construction of a new track structure with track systems in a new route, overhead line work and the replacement of a road overpass with the dismantling of the existing structure. By line improvements the permissible speed with the new bridge for conventional trains of 110 km to 140 / h should be raised, for tilting trains h of 140 km to 160 /. The new bridge is intended to contribute to noise protection for the municipality of Emskirchen by being further removed and made of concrete instead of steel .
The construction period began in November 2013 and should initially be completed in July 2016. During the construction of the bored piles, a 180 t rotary drilling rig fell over on August 28, 2014. The result was a construction delay of around four months. The new route section should now be put into operation at the end of 2016. To connect the bridge, the route between Siegelsdorf and Neustadt (Aisch) was closed between November 14th and 25th. The bridge was opened for regular traffic on November 26, 2016. The DB said after Federal Transport Minister Alexander Dobrindt showed no interest in it. Christian Schmidt , Federal Minister for Food and Agriculture , spoke at an alternative event organized by local politicians .
In addition to the speed increase (from 110 to 140 km / h) due to the new bridge, the tracks in Emskirchen station can now also be driven largely at 140 instead of the previous 110 km / h. The section between km 22.3 to 24.2 can now be driven at 140 km / h instead of the previous 110 km / h, and the travel time for long-distance trains passing through is two tenths of a minute shorter. In an arch in the west head there is a 0.6 km long section (km 24.2 to 24.8) that can only be traveled at 110 km / h.
The old bridge was demolished between the end of August 2017 and October 2017.
construction
The prestressed concrete superstructure consists of 11 openings with spans of 40.0 m in the two end spans and 48.5 m in the nine inner spans. The foundation is made on 84 bored piles with a length of up to 40 m and a diameter of 1.5 m. A haunched prestressed concrete slab beam with a full cross-section is available as the superstructure of the Aurachtal Bridge , which is connected to the columns and eastern abutments without joints . This enables a slim superstructure and slim pillars, and maintenance of the bearings is no longer necessary. However, it is no longer possible to replace the superstructure at a later date.
The construction height of the superstructure is variable, 2.5 m in the field and 6.5 m above the pillars. The pillars are solid. In the longitudinal direction, the resting point of the bridge is the eastern abutment , which is positively connected to the superstructure and the following ten pillars. Bearings are arranged on the western abutment and there is also an expansion joint with a rail extension.
The superstructure was treated with a formwork , field manner, starting at the western abutment. The time required for one cycle was around four weeks. 19,300 m³ of concrete and 3730 t of reinforcing steel were required for the structure. A total of 2265 m of bored piles had to be built.
literature
- Horst Wendler: The last gap - the Emskirchner bridge. 125 years of the Nuremberg-Würzburg railway line. Self-published by Emskirchen in 1990.
Web links
- Aurachtalbrücke construction project on the Deutsche Bahn construction information portal, accessed on November 26, 2016
- Location of the old and new bridge on the OpenRailwayMap
Individual evidence
- ↑ a b c d e Wolfgang Wittig: New construction of the Aurachtal bridge as a semi-integral solid construction ( Memento from September 22, 2015 in the Internet Archive )
- ↑ Volker Kabisch: New bridge over the Aurach valley near Emskirchen . Munich Rail, August 2014
- ↑ a b c d e Wolfgang Wittig: A semi-integral bridge over the Aurachtal . In: DB ProjektBau GmbH (Hrsg.): Infrastructure projects 2014: Building at Deutsche Bahn . DVV Media Group / Eurailpress, Hamburg 2014, ISBN 978-3-87154-505-4 , p. 86-89 .
- ↑ Noise action plan according to § 47 d of the Federal Immission Control Act for the Emskirchen district Neustadt-Aisch / Bad Windsheim with regard to the noise emissions from the railway line 5910 (Nuremberg-) Fürth - Würzburg, Government of Central Franconia December 2012
- ↑ a b Arno Stoffels: 530-meter-long railway structure near Emskirchen is only finished with a significant delay . In: Nürnberger Nachrichten . December 27, 2014, p. 17 ( online ).
- ^ D-Nuremberg: Construction of railway bridges . Document 2013 / S 082-138495 of April 26, 2013 in the supplement to the Electronic Official Journal of the European Union .
- ^ Germany-Nuremberg: Construction of railway bridges . Document 2013 / S 210-364812 of October 29, 2013 in the supplement to the Electronic Official Journal of the European Union .
- ↑ DB Mobility Logistics AG (Ed.): Start of construction of the new Aurachtal Bridge, press release from May 27, 2014.
- ↑ Annoyance at railway construction sites . In: Nürnberger Nachrichten . June 24, 2016, p. 17 .
- ↑ a b New Aurachtal bridge in operation . In: Eisenbahn-Revue International . No. 1 , 2017, ISSN 1421-2811 , p. 6 .