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Extraordinary railroad bridge over the Filstal valley – basic and detailed design of the new landmark of Baden‐Württemberg The Viaduct Filstal is part of the Albaufstieg project section of the new railway line Wendlingen–Ulm, and its tunnel‐bridge‐tunnel sequence within the existing topography and the Filstal's steep valley slopes presented the project participants with special conditions that had to be taken into account in the bridge design as well as during construction work. The adjoining tunnels with 30 m track spacing required two independent bridge structures. Therefore, two single‐tracked bridge structures were designed as jointless continuous girders with a length of 485 m and 472 m respectively, running over six spans and built as semi‐integral structures. In the area of the Y‐shaped main piers, the haunch is designed in a dissolved form with shallow inclined struts. The superstructure is a single‐cell box girder section prestressed in longitudinal direction and mildly reinforced in transverse direction. The third‐highest railroad bridge in Germany crosses the Filstal valley at a clear height of 75 m. A major challenge for design and construction of the semi‐integral structure with its slender piers was, among other things, the design of the monolithic connections and the longitudinal force transfer due to breaking loads. The selected construction method envisaged to initially build the superstructure in sections with top‐running launching truss on auxiliary towers for temporary support during construction. After completion of the superstructure, the inclined piers were concreted underneath on a suspended scaffolding, and self‐compacting concrete (SCC) was used at the superstructure connection. The total tonnage of the auxiliary construction structures amounted to approx. 3500 t per bridge. [ABSTRACT FROM AUTHOR]

Als Fortsetzung des in Heft 3/2014 erschienenen Berichtes über die neue Messehalle 3A in Nürnberg wird auf die Besonderheiten der Ausführungsplanung und Ausführung in den Bereichen Grundbau, Massivbau und Stahlbau eingegangen. Eine eigenständige Ingenieuraufgabe stellte der termingerechte Umgang mit den schwierigen Baugrundverhältnissen sowie den anspruchsvollen und hochbewehrten Betongeometrien des fugenlosen Riegelbauwerkes mit höchsten Sichtbetonanforderungen dar. Auch für den filigranen Stahlbau war eine umfassende ingenieurtechnische Bearbeitung erforderlich. Weitere Schwerpunkte des Berichtes bilden daher die Ermittlung der dreidimensional überhöhten spannungslosen Werkstattform sowie die ungewöhnlichen und komplexen Bauzustände und Baubehelfe. South Extension of Nuremberg Fairground - Construction of Hall 3A The second part of the report about Hall 3A focuses on distinctive features in the detailed design and the erection on site, regarding the aspects of geotechnics, concrete and steel construction. The construction work can be divided into two parts: the just in time design of the foundation slab due to sophisticated subsoil-conditions and the challenging, heavily reinforced and complex concrete structures of the joint-less edge wing with exposed concrete of highest quality stand for the first part. The second part focuses on the filigree steel construction and the thoroughly detailed design for all building stages, as there are: calculation of the stress free three dimensional-presetted fabrication geometry, numerous, exceptional and complex states of construction and temporary erection stages. [ABSTRACT FROM AUTHOR]