Hochstraße Elbmarsch
Coordinates: 53 ° 31 ′ 19 ″ N , 9 ° 55 ′ 35 ″ E
 Hochstraße Elbmarsch
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| Convicted | Federal motorway 7 | |
| Crossing of | Elbe March | |
| place | Hamburg | |
| construction | Prestressed concrete - T-beam bridge | |
| overall length | 3840 m + 418 m | |
| width | 2 × 17.75 m | |
| Longest span | 35 m | |
| Construction height | 2.1 m | |
| start of building | 1971 | |
| completion | 1974 | |
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The high street Elbmarsch is with 4258 m the longest road bridge in Germany. Until the Saale-Elster valley bridge was built, it was the longest bridge in Germany.
The Hochstraße is part of the A 7 motorway and is located in Hamburg south of the New Elbe Tunnel . The structure with six lanes leads over the Elbmarsch with industrial and port facilities and consists of the actual 3840 m long elevated road (K20) and the 418 m long elevated road ramp (K30). The elevated road was designed to be widened by one further lane in each direction of travel. The bridge was built between 1971 and 1974.
construction
In the normal areas, the motorway overpass consists of two 17.75 m wide and 2.10 m high superstructures with spans of 35 m. The superstructures have a T-beam cross-section with four prestressed precast concrete girders lying next to each other . These longitudinal girders are located in the pillar axes on 1.1 m high and 2.0 m wide crossbeams under which three round supports are arranged at a distance of 6.6 m. The columns have a diameter of 1.3 m and are clamped in bored piles with a 1.5 m shaft diameter and 2.1 m base diameter.
Construction work
The elevated road is a mixed construction. The substructures with crossbars and supports are made of in-situ concrete . The approximately 1000 longitudinal members were produced as prefabricated parts weighing around 110 t in a field factory and installed using a specially designed assembly device. It took one day to produce one beam, with an average of 40 beams per month.
Renovation and expansion
In 2012 it became known that the pillars had to be replaced along the entire length of the route. This work is expected to take place between 2020 and 2030. Meanwhile, the condition is considered to be better, so that only repairs to the structure and renewal of rain drains, road surface, crash barriers and the metal caps of the bridge edges are pending. At the same time, the space between the lanes is to be used for one additional lane in each direction, i.e. an expansion from six to eight lanes will take place. However, there is still a distance of around two meters. Work on this should start in 2020. Six years of construction are planned.
Between the directions of travel
Detail from below
literature
- Fritz Leonhardt: Bridges . Deutsche Verlags-Anstalt, Stuttgart 1994, ISBN 3-421-02590-8
- HG Waßmuth, H. Gass: The high road Elbmarsch . Der Bauingenieur 48 (1973) pp. 201-211
swell
- ↑ No light at the end of the Elbe tunnel. In: shz.de . November 7, 2012, accessed September 17, 2014 .
- ↑ Hochstraße Elbmarsch | K 20. Accessed March 28, 2019 .
- ↑ Jochen Gipp: Eight tracks for the Elbmarsch Bridge. In: Hamburger Abendblatt . June 6, 2015, accessed June 6, 2015
