Albrechtsgraben viaduct
| Albrechtsgraben viaduct | |
|---|---|
|
|
| Technical specifications | |
| length | 770 m |
| Arch span | 156.5 m |
| Superstructure width | 28.5 m |
| Construction height | 4.6 m |
| Max. Height above valley | 80 m |
| system | Arch bridge |
The Albrechtsgraben viaduct is a 770 m long arch bridge on the 71 motorway near Suhl .
The structure is located at kilometer 131.0 directly after the Suhl motorway triangle in the direction of the Meiningen -Nord motorway junction . It spans the Albrechtsgraben, a valley between the communities of Mäbendorf and Albrechts , with state road 2630 at a maximum height of 80 m. Since the bridge can be seen from afar, the decision was made in favor of an arch bridge with a steel composite structure as a one-piece superstructure. This also did justice to the nature reserve strip and the topography of the valley. The motorway has a clothoid (A = 1200) for a length of 316 m, starting at the western abutment , followed by a circular arc (R = 3000 m) for a length of 309 m and finally a clothoid (A = 474). The overpass was built between 1999 and 2002 at a cost of around 24 million euros.
Foundation and substructures
founding
The abutments have a flat foundation on embankments, the pillars on the red sandstone .
pier
The reinforced concrete pillars are between 17 m and 65 m high, they have a hollow cross-section and are accessible. The external dimensions of the pillars are 8.8 m across the bridge and between 2.5 m and 3.2 m in the longitudinal direction.
arc
The striking parabolic reinforced concrete arch in the middle of the bridge has a span of 156.6 m and a crown height of 70 m. At the fighters the clamped there arc has a construction m of 3.25, in the apex, it is 2.0 m. The width of the accessible two-cell hollow cross-section is 8.8 m.
superstructure
The one-piece superstructure of the composite steel bridge has a single-cell, open steel trough and a 28.5 m wide, 35 cm to 44 cm thick reinforced concrete deck connected with head bolt dowels . The bottom plate of the box cross-section is 8.3 m wide, the webs of the main girders are inclined and support the deck at a distance of 11.0 m. In addition, the deck is supported on the outside by diagonal struts approximately every 5 m. The construction height of the entire superstructure is a constant 4.5 m. The spans of the 14-field superstructure are 45 m + 55 m + 60 m + 3 × 70 m + 45 m + 40 m + 40 m + 45 m + 70 m + 60 m + 55 m + 45 m.
The rest point in the longitudinal direction is in the middle of the arch.
execution
The arch was made within four months on falsework supported by lattice towers .
literature
- DEGES: Bridge structures in the new federal states . Ernst & Sohn, Berlin (Germany), 2004. ISBN 3-433-01700-X .
Web links
Apple Town | Altwipfergrund | Coating ground | Reichenbach | Tame Gera | Schwarzbachtal | Wild Gera | Steinatal | Albrechtsgraben | Seßlestal | Schafstalgrund | Dispute | Schwarza | Red Valley | Schindgraben | Judental | Hasel Valley | Werra Valley | Jüchsen | Bahratal | Saale Valley | Lauertal | Thalwassertal | Maibach
Coordinates: 50 ° 36 ′ 33 ″ N , 10 ° 38 ′ 14 ″ E