Elbe bridge Wittenberg (railway)
Coordinates: 51 ° 51 ′ 26 ″ N , 12 ° 39 ′ 7 ″ E
| Wittenberg Elbe Bridge | ||
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| Convicted | Berlin – Halle railway line | |
| Subjugated | Elbe , km 213.73 | |
| place | Lutherstadt Wittenberg | |
| construction | Tied arch bridge | |
| overall length | 333.2 m | |
| width | 14.5 m | |
| Longest span | 156.8 m | |
| Construction height | 38.5 m | |
| start of building | 1998 | |
| completion | 2000 | |
| location | ||
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The Wittenberg Elbe Bridge is a 333.2 m long, double-track railway overpass on the Berlin – Halle railway line , which spans the Elbe in Lutherstadt Wittenberg at route km 96 .
Bridge from 1859
The first railway bridge over the Elbe was put into operation in 1859 with the opening of the railway line to Bitterfeld by the Berlin-Anhalt Railway Company . It was a wrought iron construction with a span of about 20 m, corresponding to the neighboring road bridge. In 1888, four bridge fields over the Elbe were replaced by the installation of two half-timbered superstructures with a 43 m flow opening width as well as an underlying roadway and arched upper chords that approximately corresponded to the course of the moment stress.
Due to increased line loads, the eight flood fields were replaced in 1906 and the two long current fields in 1926 with parallel- belted lattice girders . In April 1945, the two long superstructures in the area of the Elbe were destroyed, and a temporary bridge enabled the railway to operate again from July 1945. In 1947 the Reichsbahn installed two temporary steel superstructures from the “Roth-Waagner” system for the power bridges , before two half-timbered superstructures were finally installed in 1965. The flood bridges from 1926 remained unchanged, which ultimately led to a speed limit at 30 km / h due to the poor state of construction in the early 1990s . With the commissioning of the new Elbe crossing, the bridge was dismantled.
Bridge from 2000
After reunification , the redesign of the bridge began in 1995 as part of the German Unity Transport Project No. 8.3 for the Berlin – Halle / Leipzig line. In January 1995, the route for the new Elbe crossing of rail and road was determined in the course of a spatial planning procedure. The joint planning approval procedure for the bridges was initiated at the beginning of May 1996.
On May 26, 1997 the planning approval decision for the 5 km long project section with the Elbe crossing in Wittenberg was available. The design speed of 200 km / h led to a new layout and relocation of the railway line by around 350 m upstream in the area of the bridge. The planning approval decision also included a bypass road with a road bridge in the immediate vicinity. Construction began in the spring of 1998, followed two years later by a test load with 16 class 232 locomotives .
The bridge was put into operation in mid-May 2000 as part of a 2 km long new line section.
The maximum speed allowed on the bridge is now 160 km / h.
construction
The new bridge crosses the Elbe at a crossing angle of about 62 gon . The layout of the railway line is straight in the area of the bridge in the southern section and merges into a transition curve in the northern edge field, which causes a deviation of 2.7 m from the bridge axis with an equivalent radius of 1672 m at the end of the bridge.
The three-span railway crossing in the current field is a rod arch bridge with a truss bracing joists, in spans of 88.2 m in the two edge areas and 156.8 m in the main field. The truss was necessary because of the given low construction height of the arch. The postless strut framework has a system height of 10.1 m with a node spacing of 9.8 m with a total height of 11.0 m. The center distance of the two vertical lattice girders is 10.86 m, the clear width 10.11 m. The road surface for the ballast bed is designed as an orthotropic plate , stiffened by trapezoidal hollow profiles, which is removed by cross beams at a distance of 2.45 m. In the main opening of the bridge, the truss superstructure is spanned by a 27 m high steel arch, to which the truss is connected by slanted hangers made of flat steel. The arch, which is arranged along the axis of the bridge, has a two-cell box girder cross-section 1.0 m high and 2.0 m wide, which spreads out in the lower section and transfers its forces to the truss upper chords. The northern edge of the bridge is arched in plan according to the railway line.
The 11 m high river pillars have a circular cross-section at the bottom and expand towards the top in the shape of a bone.
Construction work
The individual parts of the bridge were delivered by road with weights of up to 86 t. The bridge was assembled with nine shots in the southern Elbe foreland on a dam and an auxiliary bridge with built-in reinforced concrete shunting tracks . Two sections were installed on auxiliary supports on the north bank for scheduling reasons. The southern part of the bridge was pushed in with the help of a pontoon , which had to take a maximum load of 1550 t and was supported by a mobile crane with a lifting capacity of 480 t due to the low water level of the Elbe .
Subsequent modification
In 2001, wind-induced bending vibrations were observed on the hangers of the arch bridge. In order to avoid an unplanned and premature fatigue of these components and their connections, the hangers were braced by installing diagonal steel cables. During the installation of the supplementary components, cracks were found in the connections between the hangers and the adjacent components. In 2004 this led to the establishment of a speed limit stop and temporary securing with additional tack welds. Experimental investigations and fracture mechanical calculations showed that it was not necessary to replace the hangers. To restore the planned service life of 80 years, the surfaces of the hangers were sanded at the ends and in the middle. Since then, the bridge has been navigable again at a speed of 160 km / h.
literature
- Rudolf Seidel, Reinhard Schlueter: The new railway bridge over the Elbe near Lutherstadt-Wittenberg . In: Edition ETR Ingenieurbauwerke , Hestra Verlag 2001, pp. 50–59, ISBN 3-7771-0290-3 .
Web links
- Elbe bridge Wittenberg (railway). In: Structurae
- The bridge with pictures at vde8.de
- Pictures of the dismantling of the old bridge
Individual evidence
- ^ Hilmar Spanel: On the history of the railway in and around Wittenberg 1841-1991. Series of publications by the Wittenberg City History Center, issue 14. Wittenberg 1991, pp. 54/55
- ↑ a b Federal Ministry of Transport: Transport projects German unity. Status: 1997 . Brochure (50 A4 pages), Bonn 1997, p. 21.
- ↑ Rudolf Seidel, Reinhard Schlüter: The new railway bridge over the Elbe near Lutherstadt-Wittenberg . In: Edition ETR Ingenieurbauwerke , Hestra Verlag 2001, p. 50
- ↑ News update shortly . In: Eisenbahn-Revue International , Issue 8–9 / 2000, ISSN 1421-2811 , p. 340.
- ↑ Rudolf Seidel, Reinhard Schlüter: The new railway bridge over the Elbe near Lutherstadt-Wittenberg . In: Edition ETR Ingenieurbauwerke , Hestra Verlag 2001, p. 53
- ↑ With steel cables against the wind. Mitteldeutsche Zeitung , September 30, 2004, accessed on February 19, 2012 .
- ↑ Increase in the remaining useful life of fatigue-stressed components of a tied arch bridge near Lutherstadt Wittenberg . In: Stahlbau (magazine), issue 12/2008, ISSN 0038-9145 , pp. 870–879, abstract online at www.baufachinformation.de .
| upstream | Bridges over the Elbe | downstream |
| Elbe bridge Torgau (railway) | Elbe bridge Wittenberg (railway) |
Elbe bridge Wittenberg (street) |