• Straßenbrücke "Rotes Steigle" über die A8
    © Ingolf Pompe
Projects

Road Bridge "Rotes Steigle" across Highway A8

Stuttgart, Germany, 2016

The highway A8 is to be expanded by an additional lane between the Stuttgart interchange and the junction Leonberg/Ost. Due to its restricted structural clearance, the existing arch bridge “Rotes Steigle” was replaced by a distinctive new structure, which provides a crossing for a forest road over the highway. The load bearing structure of the integral composite bridge comprises a lower arched steel box girder with varying cross-section dimensions, steel struts that are angled outwards, and a reinforced concrete deck slab. The slender construc-tion was designed as a two-hinged arch that rests on stainless steel rocker bearings at the arch-support. The superstructure is supported on the arch by slender, inclined steel braces. The deck is monolithically connected to each abutment via a thin vertical steel plate acting as an elastic spring (height of approx. 1.10 m, thickness of merely 2 cm). The individual steel elements were pre-assembled into two large segments of 120 t each, which could rapidly be installed. This way, the highway had to be closed for only two nights. The concrete work on the deck could be carried out without the need for further interuptions to highway traffic. Due to the incremental production of the steel structure and the bridge deck, the fabrication and the execution of the construction work called for extensive deformation analyses and camber calculations. Specific measures that had to be taken during the construction include the pre-stressing of the arch, and the sub-sequent casting of the abutment base and the lamella-spring support plates. Another special feature is the use of the latest generation of a new expansion joint system, which was applied at the transition joint between the superstructure and the abutment. Now, a slender steel arch structure presents a modern contrast to the previous bridge.


  • Location

    Stuttgart, Germany

  • Architect

    schlaich bergermann partner

  • Awards

    Deutscher Ingenieurbaupreis 2018, Auszeichnung

  • Client

    Regierungspräsidium Stuttgart

  • Contractor

    Wolff & Müller Ingenieurbau (Beton/concrete); Schachtbau Nordhausen (Stahl/steel)

  • Our Scope of Work

    conceptual design, construction design, technical spots check

  • Length incl. abutments 83 m
  • Span of arch 60 m
  • Deck width 6.75 m
  • Bridge area approx. 448 m²
  • Lanes 2
  • Length of bridge deck 75 m
  • Arch rise 4.93 m
  • Width between railings 6 m
  • Weight of segments approx. 120 and 130 t
  • Straßenbrücke "Rotes Steigle" über die A8 © Burkhard Walther
  • Road Bridge "Rotes Steigle" across Highway A8 © Burkhard Walther
  • Road Bridge "Rotes Steigle" across Highway A8 © Ingolf Pompe

Project location

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Schwabstraße 43
70197 Stuttgart

+49 711 64871-0
info@sbp.de