Inland Rail – Parkes to Narromine
The P2N project is the first NSW section of the 1,700km long Inland Rail project between Victoria and Brisbane, Queensland. The P2N section is one of 13 individual projects that make up the Inland Rail
Project. The P2N section is 104km in length and involved the removal of existing track infrastructure, realignment, upgrade and reconstruction with increased bearing capacity for double stacked container transport.
DATE
2018 to 2020
PRINCIPAL
ARTC
CLIENT
InLink JV
SCOPE
Our scope included the supply, spreading and mixing of binders to In-situ recycle and reuse various subgrade layers followed by moisture conditioning of the structural fill and capping layers.
KEY CHALLENGES
This project was one of the largest subgrade recycling projects in Australia
Multiple work fronts running concurrently to meet program.
The logistical challenges around binder supply and security were pivotal to success
DOLLARS SAVED
$31m
over traditional design
KG CO2 SAVED
1.9m
SOLUTIONS
The in-situ recycling option was the most appropriate solution to delivering a robust subgrade foundation for the new rail line. It minimised the need for removal and disposal of existing poor quality materials and the depletion of scarce new quarry products.
In-situ recycling enabled the engineering properties of the of the existing soils to be improved through the addition of binders to chemically alter the soil structure to enable increased carrying capacity required for the new rail line.
OUTCOMES
Significant cost and carbon savings due to use of in-situ recycling methodology
Project delivered to InLink programme utilising up to 8 crews working concurrently.
Extremely complex binder logistics management ensured no programme slippage
Works successfully executed in the complex safety critical rail environment
