OasisLMS

Abstract: In late January 2024, a new 89 feet - long railway bridge over the main road B25 close to Donauwö rth (southern Germany) was placed on its final position using the lateral bridge slide (LBS) procedure, to replace a 92-year-old structure, which was still fully operative.

The main challenge of the design and construction approach was to limit the disruption of the railway operations to a minimum. In this context, the new structure was built next to the existing one. After finishing the construction of the new structure, the contractors had a track possesion period of only 10 days to demolish the existing bridge, move the new bridge to the position of the old one, rebuild the track and restablish the railway operations. The existing ground conditions (presence of soft soils) added complexity to the execution works.

A ground improvement solution, consisting on rigid inclusions was adopted for the foundation of both the (temporary) thrust beds and the (permanent) bridge abutments. Ductile iron piles (DPI) were used as rigid inclusions, in order to guarantee the inmediate load transfer to the ground during the sliding procedure. The fast, simple and safe installation of the DIP was carried out within a very limited period of time (24 hours) and allowed for the succesfull execution of the sliding procedure.

The following Paper presents an overview of the adopted solution, focusing mainly on the design and execution of the ground improvement.

Mr. Freddy Lopez; Mr. ERICH STEINLECHNER

Annual Conference Proceedings