When it was asked to take part in the modernisation of the ANZAC Bridge in Sydney, Australia, Freyssinet had to develop some new solutions. In order to reduce vibrations due to wind and rain, Freyssinet retrofitted helical ribs onto the existing HDPE sheaths using a welding robot, without any interruption to traffic. Freyssinet dampers (IRDs), which absorb the residual vibrations, were also installed. A method for replacing the filler was specially devised in order to strengthen the stay cable anchors. At the same time, the decision was taken to improve the permanent access systems, leading to the installation of a lift in each tower and access to all of the bridge's deck-level anchors.
ANZAC Bridge (Australia)