McConnell Dowell
Challenge:
McConnell Dowell required heavy-duty structural support during the construction of the new Puhinui Interchange station, an upgrade to the original 1925 facility. The bridge structures needed to support significant loads, including approximately 1,000 tonnes of in-situ concrete by the final pour. TPL were tasked with delivering a high-capacity propping system within a live rail corridor environment.
Solution:
TPL designed and delivered a 70-tonne propping system engineered to support up to 15 tonnes per lineal metre. The system was built in close coordination with live rail operations, requiring precise scheduling and compliance. The resulting structure is believed to be one of the largest earthed propping systems ever constructed in New Zealand.
Result:
TPL provided a stable, high-capacity support solution that enabled safe and efficient progression of the Puhinui Interchange works. The structure successfully supported all concrete pours without disruption to rail operations.
Snapshot:
- 70 tonnes of engineered propping
- Designed to support 15 tonnes per lineal metre
- Supports up to 1,000 tonnes of in-situ concrete
- Built within a live rail corridor
- Delivered in collaboration with McConnell Dowell
- Believed to be one of the largest earthed propping structures in NZ
