Concrete Services
The Bunbury Outer Ring Road (BORR) is a pivotal infrastructure project forming part of the South West Freeway network and the Greater Bunbury Region Scheme (GBRS). This 27km dualcarriageway freeway is designed to streamline traffic flow between Perth and the South West Region, bypassing the Greater Bunbury area and alleviating congestion on inner arterial roads.

Dowsing Group was engaged as a subcontractor to supply and install TL5 (1070mm) high concrete road safety barriers within Sections 31 & 32 of the project, including the BORR main alignment and Bussell Highway.

Client

South West Gateway Alliance

Sector

Infrastructure

Location

Bunbury, WA

Duration

Apr 2024 to Oct 2024

Type

Design & Construct

Our expertise in slip-form concrete technology and commitment to delivering high-quality outcomes provide significant value to the BORR project.

Key value-added initiatives include:

  • Optimised Resource Allocation: By efficiently managing equipment and personnel, we reduced downtime and enhanced productivity across the project.
  • Enhanced Safety Measures: Our thorough pre-pour and post-pour inspections, combined with rigorous safety protocols, minimised risks and ensure compliance with industry standards.
  • Innovative Solutions: Our technical expertise to resolve complex site challenges, such as modifying equipment configurations to accommodate varying worksite conditions.

Our project delivery of the subcontracted works on the BORR project is underpinned by meticulous planning, clear communication, and adherence to the Head Contractor’s requirements through our integrated systems.

By fostering a collaborative approach, we ensured that all activities are seamlessly integrated into the overarching project framework, contributing to the timely and efficient delivery of works reinforcing our reputation as a trusted partner in delivering critical infrastructure projects.

The comprehensive scope of works highlights Dowsing Group’s expertise in delivering public infrastructure upgrades includes:

  • 3.5km TL5 (1070mm high) concrete barrier installation, 1km differential height TL5 barrier installation
  • 13x concrete to W-beam end treatment transitions.
  • Supply of concrete for slip formed barriers, including concrete trial mix results and required concrete testing.
  • Placement, extruding, compacting / vibrating, finishing and curing of all slip formed and in-situ concrete components including barriers, barrier transitions and end treatments, patching, grouting, rubbing and repair.
  • Base preparation works, trenching.
  • Installation of drainage penetrations.
  • Installation and fixing of all prestressing strands, reinforcement steel, cast in items and joints,
  • Tie into existing concrete safety barriers.
  • All joint preparation work including saw cutting and joint sealing and pre-pour and post-pour treatment.
  • Completion of onsite trial sections.
  • Modifications to the machine to swap the machine from LHS to RHS configuration.

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