Brno Viaduct
Coordinates: 50 ° 27 ′ 22 " N , 10 ° 51 ′ 26" E
 Brno Viaduct
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| Convicted | Federal motorway 73 | |
| Subjugated |
Bundesstrasse 4 , Bundesstrasse 281a , Brünna |
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| place | Brno / Thür. | |
| construction | Prestressed concrete box girder bridge |
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| overall length | 696 m | |
| width | 2 × 14.25 m | |
| Longest span | 50.8 m | |
| Construction height | 3.6 m | |
| height | 23 m | |
| building-costs | € 14 million | |
| start of building | 2005 | |
| completion | 2007 | |
| location | ||
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The Brno Viaduct or Brünntalbrücke is a 696 m long bridge on the 73 motorway .
The structure is located between the Schleusingen and Eisfeld- Nord motorway junctions near Brno in southern Thuringia. At a height of a maximum of 23 m with 14 fields it spans the brooks Brünna and Alterbach as well as the federal highways 4 from Eisfeld to Schleusingen and the B 281a from Brno to Sachsenbrunn . The route of the motorway in the area of the bridge is straight in plan and shows a trough with a gradient change in elevation, with a gradient of 2.4% towards Schleusingen and 2.4% towards Eisfeld. The overpass with two separate superstructures was built between 2005 and 2007.
Foundation and substructures
The abutments have a flat foundation , the pillars are built on bored piles with a diameter of 1.2 m and a length of 10 to 20 m. The full cross-section of the maximum 20 m high pillars is V-shaped. To accommodate the bearings , the octagonal cross-section at the pier head expands 7.8 m below the superstructure into two rectangular cross-sections.
Superstructures
The two adjacent superstructures of the prestressed concrete bridge have the continuous beam as a structural system . They each have a box girder cross section with a constant construction height of 3.6 m. The prestressing consists of a mixed construction with internal and external tendons .
The total span for the 14-span bridge is 696.0 m, the two end spans span 40.4 m, the 12 inner spans have a span of 50.8 m.
execution
The bridge superstructure was constructed using the incremental launching method , the incremental cellar was located on the eastern abutment .
literature
- Federal Ministry for Transport, Building and Development; Bavarian State Ministry - Supreme Building Authority; Thuringian Ministry of Construction and Transport: Federal motorway A 73 Suhl – Lichtenfels . Documentation 2008, p. 53
Web links
- www.kinkel-partner.de: Brno Viaduct ( Memento from September 25, 2012 in the Internet Archive )