The Voest Bridge has been in operation for over 40 years and is used by some 100,000 vehicles crossing the Danube every day. The carriageway shows signs of heavy wear, and now it needs renovation. In order to keep the traffic flowing during the refurbishment and to increase the capacity afterwards, bypass bridges are being added to the cable-stayed bridge.
The construction of the four oval piers in the middle of the fast-flowing Danube is a challenge regarding both formwork technology and logistics.
Sheet pile boxes are used to create a dry space for the concreting of the base, on which the piers will be built in two sections. These massive pillars with a height of approximately 15 metres are 4.5 metres wide and up to 19.7 metres long. The formwork comprises wooden boxes made of Top 50 elements with exceptionally strong special connection lugs which will deflect the anchor loads longitudinally along the piers. The round piers support the numerous entry and exit ramps and are specially manufactured using RS steel column formwork or prefabricated wooden box formwork made with Top 50 large-area formwork.