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."
Location
Scenic Rim and Logan, QLD
Client
Department of Transport and Main Roads
Head Contractor
Hazell Bros (QLD) Pty Ltd
Type of works
Roadways, Flood mitigation
Overall Project Value
$19M
Status
Current – Expected completion mid 2025
This project includes the rehabilitation of road infrastructure damaged during the 22 AFI disaster events. It spans 110 sites across 22 state-controlled roads in Scenic Rim Regional Council and Logan City Council LGAs, covering diverse environments ranging from urban roads to remote National Parks. Spanning 3,700 km² including locations such as the Cunningham Highway, Beenleigh-Redland Bay Road, and Lamington National Park Road.
Scope of Works:
Clearing, grubbing, and minor earthworks.
Batter protection, revegetation, and erosion control.
Pipe extension, minor culvert replacement, and headwall repairs/replacement.
Hand and mechanical scaling.
Major excavation and full-depth pavement reconstruction.
Stormwater outlets, mass rock fill, and retaining structures using gabions.
Reconstruction of cross-drainage culverts and upgrades of 7 km of longitudinal drainage.
Soil nailing, mesh, shotcrete, and erosion control matting for batters (2–10m).
Installation of high-tensile steel mesh and rockfall netting.
Two major debris flow barrier systems.
Construction of new drainage infrastructure with bulk clearing and excavation.
Cast-in-situ and precast headwalls and wingwalls.
Outlet erosion control, including placed rock and pinned gabion mattresses.
Significant input into designs and constructability reviews.
Service location, potholing, surveying, and preparation of as-constructed drawings.
Location
Gold Coast, QLD
Client
Department of Transport and Main Roads
Head Contractor
Hazell Bros (QLD) Pty Ltd
Type of works
Roadways, Flood mitigation
Overall Project Value
$24M
Status
Completed (Feb 2023 - Dec 2023)
The Gold Coast DRFA project restored 131 sites across 10 state-controlled roads within the City of Gold Coast. Delivered under a Transport Infrastructure Contract (TIC) for the Queensland Department of Transport and Main Roads, it was funded by the Disaster Recovery Funding Arrangement (DRFA) for events 21C and 21J. The works aimed to rehabilitate road infrastructure, with a focus on slope stability, drainage, and pavement repairs on roads damaged during these disaster events.
The project spanned various terrains, from urban areas (e.g., Southport-Nerang Road) to challenging hinterland locations, including Currumbin Valley and Eagle Heights. Sites ranged from dry forests to rainforests, with some areas having limited mobile coverage and significant drainage complexities.
Scope of Works:
Minor Sites (101 locations, 1–15 days each):
Clearing and grubbing
Minor earthworks
Hand and mechanical scaling
Batter protection
Revegetation and erosion control
Major Sites (30 locations, up to 4 months each):
Major excavation
Pavement rehabilitation and widening
Stormwater outlets and cut-off drainage
Mass rock fill and gabion walls/mattresses
Soil nailing, shotcreting, and erosion control matting
High-tensile steel mesh and rockfall netting
Batter chutes
Major debris flow barrier systems
Support Activities:
Design input and constructability advice
Service location, potholing, and surveying
Cultural heritage management and community liaison
Quality, safety, and environmental management across concurrent sites
Traffic management and stakeholder consultation
Project
Black Mountain Road – Landslide Remedial Works
Location
Black Mountain QLD 4563
Client
Noosa Shire Council
Key works
Roadways, Flood mitigation
Status
Current
The landslide, triggered by heavy rainfall in early 2022, spans over 130 meters in width, is as deep as a five-storey building, with a depth movement exceeding 15 meters. Geotechnical investigations confirm it as one of the most significant landslides impacting a road asset in the Noosa and Sunshine Coast region in the last 30 years. Extensive damage lies beneath the surface, requiring a careful restoration process.
Hazell Bros is over half-way through driving 266 steel-lined bored piles, each with a diameter of 900mm, to a depth of up to 25 meters. This includes the installation of some of the largest soil nails currently used in the southern hemisphere. The scale of the project requires an estimated use of 6,000 cubic meters of concrete, equivalent to two and a half Olympic-sized swimming pools, and 800 tonnes of steel.
The comprehensive remediation effort involves:
A large structural frame composed of two rows of contiguous bored piers (266 in total), connected by stiffening beams and a concrete road beam.
Tie backs anchoring the frame into the upslope.
Horizontal drains extending into the sub-surface materials.
Additional upslope soil anchors and header beams, as needed.
Concrete drainage works, incorporating pre-cast/cast-in-situ culverts and lined drains.
Roadworks including drainage layers, pavement, surfacing, signage, guardrail, and line marking.
Earthworks for embankment stabilisation.
Service locations.
Implementation of Erosion and Sediment Control measures.
The recovery works are jointly funded by the Australian and Queensland Governments through the Disaster Recovery Funding Arrangements (DRFA).
