Main Bridge Stockstadt (A 3)
Coordinates: 49 ° 59 '27 " N , 9 ° 3' 53" E
 Main Bridge Stockstadt
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| Convicted | Federal motorway 3 , km 208 | |
| Subjugated | Main | |
| place |
Stockstadt am Main , Aschaffenburg ( Main km 80,050) |
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| construction | Prestressed concrete - box girder bridge | |
| overall length | 361 m | |
| Longest span | 78 m | |
| height | 12 m | |
| Headroom | 6.70 m | |
| building-costs | 6.4 / 36 million DM | |
| completion | 1958/1991 | |
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The Main Bridge Stockstadt is a structure on the Federal Motorway 3 (Frankfurt – Nuremberg) near Stockstadt am Main . At motorway kilometer 208, it spans the Main at river kilometer 80.050. The bridge lies between the Stockstadt and Aschaffenburg -Zentrum junctions and was opened to traffic on July 9, 1958 as part of the Stockstadt – Hösbach section.
Bridge from 1958
The first Main Bridge was built in 1958 as part of the construction of the new motorway from Offenbach to Aschaffenburg and cost 6.4 million marks . The 25.0 m wide girder bridge had a superstructure for each directional lane, which was designed for two lanes, however, for reasons of cost, without hard shoulders. The structural system of the composite steel construction consisted in the longitudinal direction of two continuous girders with four and three openings and spans of 5 × 48 m on the left bank of the Main, 78 m as the main opening above the Main and 42.75 m on the right bank. The transverse direction of the two constant 2.2 m high superstructures was as T-beams formed and had three steel plate girders with thereon a concrete deck on. The superstructures were supported by massive pillar discs, which, like the abutments , were clad with red sandstone .
Bridge from 1991
In 1987 the replacement of the Main Bridge began as part of the six-lane expansion of the motorway. A superstructure with three lanes and one hard shoulder was built for each lane. In addition, a separate superstructure with two lanes was built for the Aschaffenburg-Zentrum junction on the right-hand side of the Main. For the Stockstadt junction on the left-hand side of the Main, an old superstructure was reused after a transverse thrust downstream. The three new bridge superstructures were designed with unchanged spans as continuous girders with seven fields, but this time as prestressed concrete beams with a constant cross-section height and box girder cross-section. The completion was in 1991, the construction costs amounted to 36 million DM.
The new bridge was overshadowed by a serious construction accident on August 30, 1988 with one dead and several injured. The two-lane, upstream bridge superstructure, which was built using the incremental launching method with the help of an auxiliary pylon and inclined tensioning, collapsed over the long opening for shipping. The pylon was pushed along with the crossing and caused a pressure rupture next to the river pier. The structural engineer’s static calculation was incorrect, which the test engineer did not recognize. The Main was closed for a long time. The reconstruction and construction of the other two superstructures took place with an auxiliary yoke in the shipping route, which was initially not permitted.
See also
literature
- Edwin Helminger: Remarkable bridge structures in the Bavarian section of the Frankfurt – Nuremberg motorway . In: Bautechnik , year 1965, issue 6.
Web links
Individual evidence
- ↑ Herbert Kupfer: The development of solid construction in the last six decades . Farewell lecture on January 23, 2008
- ↑ German Bundestag Printed Matter 13/5397 of 7 August 1996