Orealla Crescent Bridge Replacement, Sunshine Coast

Orealla Crescent Bridge Replacement, Sunshine Coast, SE Qld (2020)

This $3.2m contract entailed the Design & Construction of a new bridge over Orealla Crecent, on David Low Way at Sunrise Beach, Sunshine Coast. The works in this high-profile location included roadworks approaches, with traffic diversion off David Low Way for the duration of construction. The client was Noosa Shire Council.

Scope of Work

  • Design & Construct new 100-year design-life concrete bridge to replace the existing 30-year-old concrete bridge, which was deteriorating due to salt ingress from the neighbouring beach environment
  • Providing two lanes of traffic across the bridge structure, two cycle lanes and a separated off-road pathway 
  • Including D&C of road approaches, road widening & Orealla Crescent civils
  • Improve the overall aesthetics of the bridge
  • Complete the works with a minimum of disruption to the community 
  • Design and implementation of traffic management
  • Temporary detour of David Low Way for the duration of the works
  • Design & Construct service diversions
  • All liaison with all Local Authorities impacted by the works, including but not limited to Council, Telstra, Unitywater and Energex for design approval, coordination and construction auditing
  • Design & Construct all temporary works, including a temporary fibre optic bridge
  • Provide improved safety measures 
  • Micro-piling foundations
  • RSS walls
  • Temporary & sacrificial sheet-piling required, in the running-sand excavation environment

Notable Aspects

  • Full design management
  • SGQ design solution saved over $1m against the client’s budget
  • Worked collaboratively with Noosa Shire Council throughout
  • Detailed traffic & construction staging
  • Noise & vibration management required, including for driven sheet piles (adjacent local residences & businesses)
  • Major detour of David Low Way
  • Fast-tracked program to minimise disruption to local stakeholders (10-week bridge build time)
  • Community consultation & liaison with key stakeholders achieved desirable outcomes for all stakeholders, including residents, guests in adjacent tourist accommodations, three key nearby schools, bus and emergency services, Bicycle Qld and local cycling groups, TMR, Noosa Council and Noosa Tourism.
  • Excellent outcomes were achieved for all road users
  • Positive and constructive relationships with Noosa Shire Council and consultants enhanced project design and progress
  • Value engineering options identified by SGQ included the following adopted measures:
    • Whole D&C process optimised design and construction methods – for best possible cost (with $1m savings to the client), speed of construction, aesthetics and minimised disruption to the community & travelling public
    • A very short construction time was achieved due to the adoption of predominantly precast concrete bridge components, including abutment blade walls with in-built headstocks, Quickcell deck units and RSS wall panels to abutment zones
    • An efficient and low-impact micro-piling solution was devised for the foundations
    • The rock pitching on each corner of the bridge was tied into the RSS walls using a custom designed anchorage/retaining system (due to the 6m+ height and requirement to retain pure sand)

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