Maribyrnong Viaduct Investigation & Strengthening Design
ARTC required visual and engineering inspections of structural assets along the Newport to Summerhill Rd line section, with focus on the Maribyrnong River Viaduct, a major heritage structure built around 1928.
Challenge
ARTC required Visual and Engineering Inspections of specified structural assets along the Newport to Summerhill Rd line section, with focus on the Maribyrnong River Viaduct, a major heritage structure constructed circa 1928. The viaduct consists of 25 spans with an overall bridge length of approximately 384 metres, spanning the Maribyrnong River Valley and carrying two railway tracks of the Albion to Broadmeadows line. The challenge was to conduct comprehensive assessment of this aged infrastructure and develop appropriate strengthening solutions.
Solution
Sterling completed a comprehensive engineering inspection using access equipment and abseiling to record all defects and closely examine structural members of the viaduct. The scope included full computer modelling of the viaduct in its As-New and As-Is conditions, as well as load rating of all structural members taking into account all applicable loadings. Sterling worked with ARTC on a comprehensive Health Monitoring programme tailored specifically for this viaduct.
Deliverables
Structural investigation reports identifying deterioration mechanisms and load capacity limitations, material testing results from concrete and steel elements, strengthening design specifications for viaduct rehabilitation, and construction drawings for structural repairs and reinforcement works.
Outcome
Sterling successfully delivered the inspection and modelling section of the viaduct. Following the success in delivering the first stage of this project, Sterling was appointed to provide a strengthening solution based on the findings of the detailed inspection and modelling of the viaduct.
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