The premier class in bridge construction
The concreting started in the night from December 16 to 17, after the formwork and reinforcement had already been preheated the day before. Over a period of around 24 hours, approx. 730 m³ of concrete was poured for the trough (box girder cross-section). The work was completed on schedule on the morning of December 18. The concreted superstructure section (haunch section) has a length of 83 meters - the "premier class" in bridge construction in terms of dimensions alone.
The replacement construction of the Sechshelden viaduct comprises a total length of 916 meters in the southern section of the Hanau directional carriageway. A total of 15 superstructure sections are being built, one of which has already been completed on the shoring.
At the beginning of 2026, the next major work steps will be the concreting of the carriageway slab of superstructure section 2 on the advancing scaffolding and the shifting of the advancing scaffolding to the third construction section.
Henning Schrewe, Head of Civil Engineering Germany at Implenia, emphasizes: "Special thanks go to the entire project team for their high level of commitment and close, professional cooperation - both internally, including with our construction materials technology for concrete monitoring and with BBV Systems GmbH for the prestressing technology, as well as externally with our planning partners, subcontractors and suppliers."
The A45 Sechshelden viaduct replacement project
The Sechshelden viaduct on the A45 consists of two substructures each, which will be replaced by a new structure. The partial structures made of prestressed concrete, including the piers and abutments, will be completely demolished and also rebuilt in prestressed concrete. In the first construction phase, the first substructure in the direction of Hanau will be demolished and rebuilt. In the second construction phase, the second substructure in the direction of Dortmund will be demolished and rebuilt. The demolition and new construction of the Sechshelden viaduct will be supported by the use of advancing and supporting scaffolding.
Concreting at the Sechshelden viaduct: 730 m³ of concrete poured in 24 hours
