Infrapipe Case Study
Dalgety
The Dalgety Drive project involved the installation of a new private stormwater main as part of the wider drainage works at 38 Dalgety Drive, Wiri.
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Project Overview
The Dalgety Drive project involved the installation of a new private stormwater main as part of the wider drainage works at 38 Dalgety Drive, Wiri.
- Approximately 95 metres of DN525 SN16 Infrapipe was installed through a shared right of way. The pipeline was laid at an approximately 1.7% grade and connected to the new private stormwater manhole, while incorporating the existing DN225 catchpit connections.
Key Project Facts
- Location: 38 Dalgety Drive, Wiri
- Application: Private stormwater main
- Pipe: DN525 SN16 Infrapipe
- Length: Approximately 95 metres.
- Grade: Approximately 1.7%
- Installation environment: Shared right of way / restricted access
- Connections: New private stormwater manhole and existing DN225 catchpit connections.
Project Challenges
One of the main challenges was working within a tight, shared right of way that needed to remain operational throughout the works.
The restricted space created challenges for excavator access, trench shielding, pipe deliveries and stockpiling. The installation also required careful coordination of vehicle movements, other contractors and ongoing access through the area.
Existing catchpit connections and changes in alignment added further complexity. Custom-made bends, a junction and double couplers were required to achieve the required alignment and connections.
Products Supplied
Approximately 102 metres (17 lengths) of DN525 SN16 pipe, along with a selection of custom-made components:
- 8 × Double Couplers
- 2 × 45° Bends
- 1 × Junction
Installation Efficiency
One of the key advantages was the speed of installation.
Infrapipe was supplied in approximately six-metre lengths, compared with approximately two-metre lengths for equivalent concrete pipe. This meant there were roughly one-third as many individual pipe sections to handle and install, along with considerably fewer joints.
The longer pipe lengths reduced the number of lifts required and allowed the installation team to progress more quickly along the line.
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