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Civil Engineering

VARIOKIT Cantilevered Parapet Systems

VARIOKIT Cantilevered parapet system: A safe and clean solution for short bridges and redevelopment.
VARIOKIT Parapet Track: The parapet track is suspended from the underside of the bridge by means of rails and roller units. As a result, the parapet which is to be formed is always accessible.
VARIOKIT Parapet Track: With the parapet track, multiple 20 m long centre and outer parapet sections can be shuttered, concreted and struck per week – ensuring unrestricted use of the carriageway.
VARIOKIT Parapet Carriage: The parapet carriage moving on the bridge superstructure can easily be adapted to accommodate obstructions and any changes in the cross-section. All necessary adjustment work is carried out from the working platform.
VARIOKIT Parapet Carriage: Moving the parapet carriage takes place both cost-effectively and site compliant by means of steel profiles. As a rule, no anchoring is required in the structure and horizontal forces are transferred via friction.
The VARIOKIT cantilever bracket is the construction kit solution for the realization of cantilevers on bridges built using the steel composite and semi-finished concrete element construction methods.
VARIOKIT Cantilever Bracket: For short rail, motorway or side street crossings as well as for handling large on-site material requirements, the cantilever bracket provides economical and highly efficient solutions. Decisive advantages are fast assembly, low dead weight and suspension with standard anchoring systems.
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Overview

Just as different as the methods of bridge construction are the requirements regarding the production of cantilevered parapets. Many circumstances influence the choice of the formwork systems for an optimal construction process.

Catered to the requirements of the jobsite and the structure, the VARIOKIT engineering construction kit offers the right and structurally optimal solution in the form of:

  • Individual brackets with formwork unit, suspended at the lower side of the cantilever
  • A launched traveler with formwork unit moving on the lower side of the cantilever
  • A carriage moving on the bridge with formwork suspended from a gallows construction

VGW (Carriage)

Here, a carriage travels on the completed superstructure and features 5.50 m long formwork sections in standard cases. Several carriages are coupled together in order to achieve the required length of the concreting section.

The carriages move by means of heavy-duty rollers on the U-profiles positioned on the bridge.

The loads are carried on a gallows construction and ballast. As a result, no anchors are needed in the superstructure.

Technical details

  • Standard deployment is with 4 carriages of 5.50 m each
  • With this configuration, parapets can be realized up to a height of w/h = 50/80 cm. For this, the ballast is merely modified for the respective loads.
  • Larger parapets can be realized thanks to the VARIOKIT modular construction kit as well as by simply changing the geometry on the carriage.

VGB (Parapet Track)

The parapet track moves on rollers which are attached to the lower side of the cantilever. These rollers can be mounted to the superstructure during the process via an advance platform and can be retrieved again on the finishing platform. This means no additional access to the lower side of the bridge is required.

The complete superstructure is free of obstructions, which positively influences the construction process. The anchoring of the roller bearings is done with the PERI M24 anchor sleeve, which is already mounted during the concreting of the superstructure.  

By transferring of the complete concrete loads via the roller unit and also because of its easy and intuitive operation, short cycle times are possible.

Technical details

  • Individual formwork configurations depending on the parapet geometry
  • The influence width depends on the parapet size. The guidelines are approximately as follows:
    • Influence width 1.50 m for cross-sectional areas of parapet up to  0.20 m²
    • Influence width 1.25 m for cross-sectional areas of parapet up to  0.40 m²
    • Influence width 1.00 m for cross-sectional areas of parapet up to  0.60 m²
  • Reasonable moving lengths up to 25 m

VGK (Bracket)

For shorter bridges that do not justify the effort of mounting a carriage or a track, the cantilever parapet bracket represents an efficient and economic formwork solution. Thanks to the separation of working platform and formwork unit, the VGK cantilever parapet bracket is optimally catered to the requirements of bridge refurbishment.

The brackets are attached to the lower side of the cantilever and further in the process are supplemented with planks to form closed platforms. After this, the formwork can be safely and comfortably assembled and aligned – even after the possible demolishing of the old cantilevered parapet.

For the construction of new bridges, the PERI M24 anchor sleeve is already mounted in during the concreting of the bridge for the anchoring of the brackets. For bridge refurbishment, subsequent anchoring systems can be used.

Technical details

  • Parapet dimensions up to W/H = 60/100 cm
  • Influence width up to 1.84 m
  • Separate platform and formwork units