The first stage of Devonport Quaylink development, terminal 3 marine and dredge works involved the delivery of a wharf to accommodate the new trans-Tasman ferries from Geelong.
The contract included the design and construction of a new 140m long wharf, dredging of the berth pocket and reclamation works at Berth 3E, Devonport.
The scope of work for the wharf and access bridges required Brady Marine & Civil to:
- Install 107 steel tubular piles, both vertical and raker, with diameters of 1.2 and 1.5 metres.
- Supply and install precast elements including 56 headstocks shells, 41 deck beams and 31 deck planks.
- Complete in-situ concreting of precast headstock shells, deck slabs, kerbs for the two access bridges, a wide wharf and a narrow wharf.
- Construct 10 elevated walkway columns and headstocks.
- Design, supply and install four mooring dolphins.
- Supply and install hydraulic water services and electrical services.
- Supply and install deck furniture, cathodic protection and pile protective wrapping.
- Construct Maritime Safety Queensland navigation lead lights.
Special Features
Brady Marine identified an alternative design for the four mooring dolphins, proposing a single large diameter monopile in lieu of the four raked piles with tension anchors in the conforming design. The innovative alternative was supported by client Port of Brisbane and incorporated into the contract at the time of award as it offered significant time and cost savings. This best practice solution was highly successful and an integral component to the overall success of the project.
The monopiles also resulted in reductions of over 360tonnes (30% CO2 reduction) CO2 for the dolphins when utilising a monopile solution, instead of the conforming solution.
More information on the project can be found at https://www.portbris.com.au/cruise/about-the-facility
All demolition material was returned to shore for onward transport to a concrete recycling plant for crushing and recycling of concrete and reinforcing steel.
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