Watercare's Central Interceptor demanded some of the largest and most technically advanced jacking pipe installed in New Zealand. To support Link Sewers B and C, Hynds developed and manufactured a bespoke lined concrete jacking pipe system capable of withstanding extreme installation loads, deep groundwater conditions and drives exceeding 1,200 metres - helping deliver a critical upgrade to Auckland's wastewater network.
The hybrid jacking pipe design posed a number of challenges to manufacture, test and deliver to site:
- Ø16mm Spiral reinforcing steel required the design and fabrication of a bespoke reinforcing bending machine
- Steel fibre reinforcing to accommodate an 80mm thick sacrificial layer
- Joint design and testing to 60m external working pressure
- Pipe length maximised to reduce number of joints
- State-of-the-art intermediate jacking stations supplied
- Special deliver racks developed to improve health and safety during loading and offloading
Hynds Pipe Systems are proud to have partnered with the exceptional engineering and project teams at Watercare and the GAJV contractor on delivering on this vital upgrade of Auckland’s wastewater infrastructure network.
Products Featured
Hyforce® Concrete Jacking Pipe System
Quick Stats:
- Ø2.1m – Ø2.4m jacking pipe
- 700 truck loads
- 4,300m – total length
- 20,000 tonnes of product
- Up to 60m below the water table
- Longest drive over 1,200m
- Bespoke manufacturing
