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 NRS AS: Friday, November 21, 2008 Edge breaking technology 

The OVERHEAD launching gantry:


Typical erection methods, conditions and feasibilities:

Our gantries (LG) can be used for both balanced cantilever as well as for infill span-by-span erection. Depending on the project dry joint or wet joint erection is required.

  • Featuring segmental bridges with dry or glued joints, using erection methods like infill-spans and balanced cantilever.
  • Special hinged overhead gantries (with up to 6 hinges) have been supplied to accommodate tight horizontal curvature, down to 100m radii.
  • Side-launching of gantry to accommodate erection of separate parallel double and triple tracks, as well as bifurcation spans.
  • Vertical climbing of gantries to allow access for side shifting to neighbouring bridges, and to accommodate tight vertical curvature and steep longfall.
  • Fully and partly final post-tensioning carried out while the whole span is still suspended to the gantry, without need to use special plunger arrangement at each end.
  • "Glue-as-you-go", erecting segments without any or only limited double handling.
  • Balanced cantilever and infill-span erection with same gantry.
  • Cranes capable of walking through hinged transitions (also noses).
  • Gantry can lift and adjust whole span in level and line
    (vertical and transverse adjustment)
  • Gantry is selflaunching, transports also supports by its own crane.
  • Aux. equipment for erecting pre-cast wings at 2nd stage ( if needed).



Special features:

Front support & Prop   Front support (Gantry & span can be adjusted hydraulically)

For more information: See Our Projectgallery