Dambachtal valley bridge
Coordinates: 50 ° 33 ′ 57 ″ N , 10 ° 43 ′ 48 ″ E
 Dambachtal valley bridge
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| Convicted | Federal motorway 73 | |
| Subjugated | Dambach, L2634 | |
| place | Hirschbach | |
| construction | Steel composite box girder bridge |
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| overall length | 370 m | |
| width | 28.5 m | |
| Longest span | 85 m | |
| Construction height | 4.5 m | |
| height | 65 m | |
| building-costs | 10 million euros | |
| start of building | 2003 | |
| completion | 2005 | |
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The Dambachtal viaduct is a 370 m long bridge on the 73 motorway at km 9.0.
The structure is located in southern Thuringia between the Suhl- Friedberg and Schleusingen motorway junctions . It spans the Dambach valley west of Hirschbach at a maximum height of 65 m with six fields with the L2634 state road from Hirschbach to Altendambach as well as a 15 kV and a 110 kV overhead line . The bridge is straight in plan and has a longitudinal gradient of 2.34% in the direction of Schleusingen. In the transverse direction, both lanes have a gradient of 2.5% outwards. The overpass was built between 2003 and 2005 at a cost of around 10 million euros.
Foundation and substructures
The abutments and pillars have a flat foundation . The Y-shaped reinforced concrete pillars with a maximum height of 56 m have a full cross-section. At the bottom they consist of two trapezoidal stems that are connected in sections by panes and bolts. To accommodate the bearings , the standards at the pier head spread out into two rectangular cross-sections 10 m below the superstructure.
superstructure
The one-piece superstructure of the composite steel bridge has a single-cell, open steel trough and a 28.4 m wide, 30 cm to 45 cm thick reinforced concrete deck connected with headed dowels . The bottom plate of the box cross-section is 7.9 m wide, the webs of the main girders are inclined and support the deck at a distance of 10.6 m. In addition, the deck is supported on the outside by inclined struts at a distance of 5 m. The construction height of the entire superstructure is a constant 4.5 m. The span of the six-span superstructure is 50.0 m + 65.0 m + 85.0 m + 65.0 m + 60.0 m + 45.0 m.
The rest point in the longitudinal direction is in the middle of the bridge, where three pillars are immovably connected to the superstructure.
execution
The steel superstructure was delivered in individual parts by truck. The final welding took place on the southern abutment. To install the steel trough was a launching nose in incremental launching inserted. Finally, the reinforced concrete deck slab was produced in sections with lengths of 16.5 to 25 m using a formwork carriage .
literature
- Proceedings: 15th Dresden Bridge Building Symposium . March 2005
