Kuranda Range Kennedy Highway Geotechnical Works
Key capabilities: Slope stabilisation; Major road & highway infrastructure; Complex traffic management
Project location: Kuranda Range Cairns, Queensland
Client name: Department of Transport and Main Roads
Project duration: November 2013 – December 2014
Project value: $8.8 million
About the project
This Slope Stabilisation project was implemented to ensure a critical network link between Cairns and the Atherton Tablelands remained open throughout the tropical monsoonal wet season.
- Clearing and grubbing in a World Heritage Tropical Area.
- Rock scaling and batter regrading using a long reach and at times beyond the reach of a long reach.
- Earthworks excavation and embankment works including the rock armouring of downslope batters on a narrow, winding and busy road.
- Traffic management that included contraflow, 24hr lane closures and the use of temporary traffic lights over a 24hr period in extreme weather conditions.
- Road pavement reconstruction.
- Slope stabilisation and protection works.
- Soil nailing and rock doweling both upslope and downslope using elevated work platforms and sleds.
- Shotcreting both upslope and downslope batters using fibred and unfibred reinforced coloured concrete.
- The installation of steel wire gabion and mattress works downslope to enable curve widening and out fall structure protection.
- High tensile steel and erosion netting was installed on both upslope and downslope.
- Construction of a fauna crossing.
Innovations & highlights
- This was the first project undertaken by DTMR on the Kuranda Range to feature 24hr construction work.
- The project addressed several well-known locations along the route which previously were not wide enough for trucks to pass without collision.
- Works took place in an environmentally sensitive World Heritage Tropical Area.
- Work was undertaken during the wet season under strict environmental regulation by the Wet Tropics Management Authority (WTMA).
- The project survived Cyclone Ita, was constructed on time and budget and received positive feedback from local stakeholders both during and after construction.
- There were no lost time injuries.
- Works required detailed planning in regards to safety, environment, staging and traffic management issues.
- All works were undertaken in accordance with strict TMR specifications and supervision.