Inspire : Public Works July Aug 2013
24 Public Works Professional July-August 2013 FREEWAY FASHION ongoing upgrade and duplication of the Paci c Highway. The bypass is a 14.5km four-lane highway with grade- separated intersections at South Kempsey and Frederickton. Its construction involved some 1.4 million cubic metres of earthworks, nine small bridges for interchanges, creek crossings, local road overpasses and a crossing of the main north-south rail line." AUSTRALIA'S LONGEST BRIDGE The scale of the project is further highlighted by the fact that the new 3.2km bridge, erected over the Macleay River and nearby oodplains at a contract price of $185 million, now holds the title of Australia's longest bridge. Designed and constructed by Abigroup, the bridge called for almost 400 huge foundation piles and 941 concrete beams, each weighing 65 tonnes and measuring 43m long by 1500mm deep. More than 70 piles were bored to support the river span and the rest were tube steel driven to support the oodplain structure. During its construction phase, the Kempsey Bypass created some 360 direct and 1100 indirect jobs, according to NSW Minister for Roads and Ports, Duncan Gay. "Moreover, it has also taken some 2000 trucks a day o the local streets of Kempsey and Fredrickton, making them better places to live and raise a family," he says. BRISBANE'S ELEGANT SOLUTION Meanwhile in Brisbane, the elegant 4.6km road tunnel that will provide motorists with a four-minute connection between the Western Freeway at Toowong and the Inner City Bypass at Kelvin Grove is progressing ahead of schedule. Commenced in April 2011, this $1.5-billion Brisbane City Council project is being built by Transcity, a consortium between Brisbane-based BMD Constructions, Italian tunnelling company Ghella and the Spanish tunnelling and infrastructure company Acciona. Two massive tunnel boring machines (TBMs), each 12.4 metres in diameter and 110 metres long, completed the tunnelling task ahead of schedule in June this year, a er working around the clock for 14 months. More than one million cubic metres of soil was excavated by the TBMs and transported by conveyor to Mount Coot-tha Quarry via a spoil conveyor, eliminating 96,000 spoil truck movements from local streets. Grout will also be piped rather than trucked to the tunnel to secure roughly 35,000 precast concrete segments in the lining operation. With the main tunnelling operation complete, the project team will now work around the clock to remove the TBMs from the worksite to enable mechanical and electrical t out to start, ahead of the tunnel opening to tra c in 2015. ••• With the dramatic use of bright colours and harmonising materials, scale, form and texture, ARM gave strong aesthetic quality to what might have remained mundane. Clockwise, from top le : Legacy Way Tunnel; artistic patterned tiles; Macleay River Bridge; Melbourne's Peninsula Link.
Public Works May Jun 2013
Public Works Professional Sept - Oct 2013