Haseltal Bridge (A 3)
Coordinates: 49 ° 52 ′ 46 ″ N , 9 ° 26 ′ 14 ″ E
 Hasel valley bridge
|
||
|---|---|---|
 |
||
| Convicted | Federal motorway 3 | |
| Subjugated | Haslochbach | |
| place | Bischbrunn | |
| construction | Prestressed concrete - box girder bridge | |
| overall length | 678 m | |
| Longest span | 58 m | |
| Construction height | 4.5 m | |
| height | 70 m | |
| building-costs | 30 million euros | |
| start of building | 2008 | |
| completion | 2011 | |
| location | ||
|
||
The Haseltalbrücke is a large valley bridge in the Spessart and crosses the Haseltal with the Haslochbach between the Rohrbrunn and Marktheidenfeld junctions . It belongs to the federal motorway 3 and is a maximum of 70 m above the valley floor.
The first bridge was established between 1959 and 1961, the costs were 15 million DM . A new building was built between 2008 and 2011 for around 30 million euros.
Bridge from 1961
The bridge had a radius of 2000 m and a transverse gradient of 2.5%. It was produced between 1959 and 1961, the cost was 15 million DM (in today's purchasing power about 34 million euros).
superstructure
The steel superstructure with a weight of 4735 tons was a welded plate beam construction with two full-walled main girders and an orthotropic deck . It was erected in cantilever with one auxiliary support per field. The total length of the seven-span bridge was 660.4 m with spans of 76.2 m for the two end spans and 101.6 m for the five inner spans. The main girders were arranged at a distance of 18.52 m and had a web height of 3.7 m at the abutment and 5.0 m in the middle of the bridge. The cross members, which were arranged perpendicular to this, were spaced 2.3 m apart and at a maximum height of 0.9 m.
Foundation and substructure
The abutments and pillars were flat. The substructure consisted of six pairs of round pillars with a hollow cross-section made of reinforced concrete . The wall thickness was 50 cm, with a diameter of 6 m. The middle four pairs of pillars were connected by head bolts.
Repair
Due to a large number of weld seams, the bridge was repaired and strengthened between 1985 and 1987 for 10 million DM. Approximately 950 tons of structural steel were used.
Bridge from 2011
Due to repeated cracks in weld seams, the bridge was replaced by a new building in advance as part of the six-lane expansion of the A3. It was built between 2008 and 2011 with total construction costs of EUR 30 million.
superstructure
The construction was a 678 m long and 36 m wide prestressed concrete girder bridge with two separate superstructures for the two directional lanes. The replacement new building has twelve fields with a maximum of 58 m span for the ten inner fields and 49 m for the two end fields. Since then, 22 instead of 12 pillars have stood in the Haseltal and support the roadway that runs up to 70 m above the valley.
Construction process
The superstructures were built using the incremental launching method. On September 11, 2009, the first superstructure reached the opposite abutment. At the end of 2009, traffic was relocated to the new, south-facing structure, initially with both directions of travel. In 2010 the old bridge was demolished. After the road surface had been removed, the first segment was cut out of the superstructure at the beginning of March and lowered to the ground using strand jacks . Then the up to 95 m long and 800 to heavy parts in the valley floor were cut to the necessary size for removal and the bridge sections remaining on the pillars were lifted down with a mobile crane. The six pairs of bridge piers were blown up on April 14, May 5 and July 21, 2010. After the demolition work was completed, the northern superstructure was erected by November 2011.
Construction site April 2009
Construction site July 2009
Construction site July 2009
Construction site July 2009 ( front end )
Construction site April 2010
Construction site April 2010
literature
- L. Schmerber and R. Hofmann: The Haseltalbrücke . In: Stahlbau , born 1964, issue 6.
- The Federal Minister of Transport: Maintenance work on bridges and other road engineering structures - Documentation 1990 . Verkehrsblatt-Verlag Dortmund, ISBN 3-89273-068-7 .
Web links
Individual evidence
- ^ N. Schmidt: Haseltalbrücke BAB A3, Frankfurt-Nuremberg, special features for the implementation planning . Munich Solid Construction Colloquium WS 2008/2009 on December 8, 2008
- ↑ Motorway Directorate North Bavaria: A3 Aschaffenburg - Biebelried SIX-LINE EXPANSION (status: 05/2018) .
- ↑ Autobahn. How construction workers maneuver the new Haseltalbrücke through the air - shell construction finished tomorrow. In: Main-Echo. September 10, 2009, accessed January 21, 2017 .
- ↑ Autobahn: demolition with a delay - the time of the construction site lanes begins between Hösbach and Kauppenbrücke. In: Main-Echo. March 3, 2010, accessed January 21, 2017 .