Concrete Services
Selected as the preferred slipform contractor, Dowsing Group played a key role in the delivery of this critical transport infrastructure upgrade connecting the upgraded Armadale Road with North Lake Road via a new bridge over the Kwinana Freeway.

 

Engaged by the Armadale Access Alliance, a consortium led by Laing O’Rourke and BG&E in partnership with Main Roads WA, Dowsing Group was responsible for the construction of approximately 3.7km of slipform concrete barriers and transitions, incorporating both TL4 and TL5 profiles.

Client

Armadale Access Alliance / Lang O’Rourke

Sector

Infrastructure

Location

Jandakot, WA

Duration

Dec 2020 & Sep 2021

Type

Construct Only

Our team delivered exceptional value through innovation, agility, and collaborative delivery:

  • Dual Conveyor Innovation: WA-first deployment of a dual conveyor on our SP25 slipform paver enabled simultaneous discharge from two concrete trucks, significantly boosting pour rates to up to 100m³ in 5-hour shifts.
  • Rapid “Pour and Strip” Methodology: We performed same-day pour and strip on in-situ sections, enhancing production time and barrier finish by achieving seamless transition between slipformed and hand-poured elements.
  • Adaptability to Complexity: Successfully managed variable-height and curved barrier profiles in tight geometry locations by reconfiguring slipform setup to maintain smooth and consistent finish.

Dowsing operated within a live freeway environment, delivering works around staged traffic conditions. Barrier pours were tightly coordinated with the head contractor’s Traffic Management Plans and VMPs to minimise public disruption while maintaining safety and production efficiency.

  • 1.3km TL4 barrier with 200mm embedment
  • 525m TL4 barrier with 75mm embedment
  • 308m TL5 barrier with 200mm embedment
  • 299m TL5 barrier with 75mm embedment
  • 86m of 1.2m high barrier with 200mm embedment
  • 94m of 1.42m high barrier with 200mm embedment

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