Design & Construction of Embankment Restoration - Urliup Road

Location Urliup NSW 2484
Client Tweed Shire Council
Head Contractor Hazell Bros (QLD) Pty Ltd
Type of works Flood mitigation
Overall Project Value $5M
Status Completed (Nov 2023 - Jun 2024)

 

This project involved the design and construction of embankment stabilisation across six sites along Urliup Road in the Tweed Shire Council Local Government Area.

The work included:

  • Stabilisation using gabion baskets and soil nails at three sites.
  • Installation of soil nails, rock anchors, tecco mesh, and hydro mulch at one site.
  • Stabilisation using soil nails and shotcrete at two sites.

Scope of Works:

The completed works included:

  • Active involvement in the design process to ensure a “fit for purpose” approach that prioritised construction safety and efficiency.
  • Selective flora and fauna clearing, use of floating silt curtains for waterway protection, and coir logs and silt fences at steep downslope embankments.
  • Implementation of temporary traffic guidance schemes (TGS) with controlled road closures from 9:00 am to 3:00 pm, signage, and traffic control on a narrow and winding road.
  • Proactive communication with stakeholders about road closures, prioritising access for residents, and fostering positive community relationships.
  • Road widening and the creation of vehicle passing bays to facilitate construction.
  • Anchor Installation:
    • Static anchors: 46 x 3m to secure drill wagons and rope-access personnel.
    • Temporary anchors: 48 x 3m (30/11 bar), predrilled, grouted, and installed to stabilise vertical cuts in staged 1m increments, with geofabric and SL81 mesh applied after each stage.
    • Rock anchors: 40 x 3m (30/11 bar), predrilled into 100mm holes, grouted, and tested.
    • Soil nails: 158 x 6m (30/11 bar), predrilled into 100mm holes, grouted, and tested.
  • Construction of three gabion walls, varying in height from 2.0m to 4.5m, using 120cm gabion rock carefully hand-placed in gabion baskets and reno mattresses.
  • Reinstatement of drainage structures, kerbs, pavements, and asphalt adjacent to embankment remediation structures.

Brad Turner, Project Manager at Tweed Shire Council, commended the Hazell Bros team, stating:

"It has been great to work with the team on this project and see their commitment to accommodating the local community."

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