Keller’s Waterways Construction business unit in Australia has announced successful completion of its first bridge construction project following acquisition of specialist marine contractor Smithbridge Group.
The Stingray Creek Bridge replaces an 1960s existing road structure and Keller has says that the work brought many logistical, environmental and technical challenge.
The new bridge, which replaces one built in the 1960s, is a two-lane, single carriageway with pedestrian and bicycle crossings on both sides. At 190m long and 15m wide, the bridge is sited just upstream from the old, 7m wide bridge and provides a much safer crossing for both traffic and pedestrians.
“When we came on board, issues with the piling design were slowing down the project,” said Waterway Construction project manager Toby Cuthbert Ashmore. “We were able to use our special piling and project management expertise and work closely with the client’s designers to refine the design and achieve realistic loads.”
Working on a curvilinear alignment to suit the site constraints, the scope of works involved supplying and installing 22 cast-in-situ steel piles (900mm and 1,500mm), 12 reinforced concrete columns, 49 deep Super Ts (pre-cast bridge girders weighing around 50 tonnes each) and a 200mm-thick reinforced concrete deck slab. There were also significant approach roadworks, which included the installation of 140 timber piles.
Keller said that despite the challenges, the bridge was opened on time.