Schraudenbach Viaduct
Coordinates: 49 ° 59 ′ 11 ″ N , 10 ° 3 ′ 14 ″ E
 Schraudenbach Viaduct
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| Convicted | Federal motorway 7 | |
| Subjugated | Stängersgraben , SW 12 | |
| place | Werneck | |
| construction | Prestressed concrete girder bridge | |
| overall length | 236 m | |
| height | 22 m | |
| location | ||
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The Schraudenbach viaduct is a structure on the federal motorway 7 near Schraudenbach in Lower Franconia between the Schweinfurt / Werneck motorway junction and the Gramschatzer Wald junction . The bridge built in 1965 was replaced by a new one between June 2015 and December 2019.
On 15 June 2016 the construction work that overthrew formwork supporting shoring together with liquid concrete one. A 38-year-old construction worker was killed and 14 workers were injured, some seriously. The collapse raised questions about the stability of shoring in building projects on other bridge structures.
bridges
Bridge from 1965
Two kilometers southwest of the Schweinfurt / Werneck motorway junction, the A 7 runs over the Schraudenbacher Viaduct in the Schweinfurt district . The bridge had four lanes and two hard shoulder lanes. The Stängersgraben and the SW 12 district road from Schraudenbach to Zeuzleben run under the bridge .
The bridge was to be replaced by a new prestressed concrete structure by the end of 2018 , as the almost 50-year-old valley bridge had to be renewed due to the poor overall condition of the structure.
Bridge from 2015
From June 2015 the new, 236 meter long viaduct was built to replace the old one. The structure, which was made as a so-called two-legged T- beam , cost around 17.5 million euros. A later six-lane expansion of the A 7 between the Schweinfurt / Werneck interchange and the Biebelried interchange was taken into account with a corresponding cross-section of the lane. The Max Bögl group of companies was commissioned to carry out the bridge construction work. This commissioned another company to work on parts of the bridge.
The superstructures were erected with a shoring that supported the formwork with the concrete that was liquid during concreting. During the construction of the third construction section of the eastern superstructure, the 20-meter-high shoring between Pillar 5 and Pillar 6 collapsed on June 15, 2016 shortly after 4 p.m. with a freshly concreted superstructure section 40 meters long. Initially, the construction company was unable to provide any information about how many construction workers were working on the construction site. It was also unclear whether people on the road running under the bridge were buried by the collapsed mass. A 38-year-old construction worker was found dead from the rubble. 14 of his colleagues were injured, some of them life-threatening. You worked for one of Max Bögl's subcontractors. The construction company itself later announced that "no employee was affected" by its operation. The construction workers recovered more than 150 helpers from the fire brigade, rescue service and technical aid organization.
The criminal police in Schweinfurt and the public prosecutor's office in Schweinfurt took over the investigations into negligent homicide and negligent bodily harm. According to an expert opinion, the cause of the collapse of the shoring during concreting was a stability failure of a scaffold support due to undersized connecting elements. The responsible engineer, who created the statics and the execution drawings for the shoring, and the checking engineer , who was responsible for checking the statics and the construction supervision, as well as his employee, an engineer from an external company, were charged with the Schweinfurt Regional Court in September 2018 negligent homicide and in 14 cases of negligent bodily harm. The trial started on November 6, 2019.
For the further construction which damaged not pressed needed strands of tendons are released from their cast-in anchors on the clamping heads and replaced with new strands. The anchor heads were exposed by means of high pressure water jets. The reinforcing steel to be cut was restored by subsequently welded in reinforcing bars.
The first bridge superstructure was opened to traffic at the end of November 2017, and the replacement of the Schraudenbach viaduct was completed in December 2019.
Web links
- Information on the renovation of the viaduct can be found on the website of the Northern Bavaria Motorway Directorate
Individual evidence
- ↑ a b c d Autobahn Directorate North Bavaria, Press Release No. 86/19, December 4, 2019
- ↑ a b Restored broken - public prosecutor's office determined. In: www.tagesspiegel.de. Retrieved June 16, 2016 .
- ↑ It's the Stängersgraben, and not the Schraudenbach. Mainpost, December 30, 2015, accessed June 17, 12016.
- ↑ bridge collapse in Schraudenbach: "As if a building had been blown up" - N24.de. In: N24.de. Retrieved June 16, 2016 .
- ↑ Olaf Przybilla Schweinfurt: Misfortune in Lower Franconia: The rubble field gives an idea of how difficult the search for the cause will be . In: sueddeutsche.de . ISSN 0174-4917 ( sueddeutsche.de [accessed on June 16, 2016]).
- ^ Medienhaus Der Neue Tag: Max Bögl and the Werneck accident: Difficult investigations. Retrieved August 1, 2016 .
- ↑ infranken.de: Collapsed motorway bridge near Werneck: expert opinion heavily burdened structural engineers . September 21, 2017
- ↑ np-coburg.de: Bridge collapse at A 7: Public prosecutor's office brings charges of negligent homicide . 18th September 2018
- ↑ Coburger Tageblatt, Thursday, November 7, 2019.
- ↑ Motorway Directorate North Bavaria: A 7, further construction of the Schraudenbach viaduct started . Press release No. 10/16, November 9, 2016