Christchurch Brick Barrel Sewers & Stormwater Pipes CIPP
Service: | Trenchless Pipe Rehabilitation |
Cost: | $12,000,000 |
Started: | Jul 2012 |
Completed: | Aug 2013 |
Client: | SCIRT |
Engineer: | Opus & Aecom |
Largest CIPP project in NZ ever!
The project involves installing very thick CIPP structural liner in Brick Barrel Sewer and Stormwater pipes close to the Christchurch CBD.
- Various large egg-shape and elliptical pipes
- Designed to withstand earthquake liquefaction effects
- Due to the size of the project the installation speed had to be increased by a factor 3
- Working in heavy traffic in an inner-city environment
- By-passing of sewer flows of up to 300 litres per second
- All resin mixing was done inside the "Red Zone" to reduce risk
- Confined Space entries
Project Scope
- CIPP lining of pipes varying in diameter from 450mm to 1,350mm in diameter
- Working in the main arterial roads around the CBD such as Moorhouse, Kilmore, Madras and Fitzgerald Avenue
- Over the manhole resin impregnation is used due the sheer volume and size of the CIPP materials
- The project involves creating temporary and permanent access to the pipes
- Major alterations to large manholes up to 4m deep including well pointing & trench shields
- The CIPP pipes were designed to a much more severe standard to cater for future earthquakes.
- All pipes were more or less permanently flooded
- By-pass pumping involves major volumes of sewage pumped above and below ground in busy streets
Project Outcomes
- All sections of CIPP liner were installed to a high standard
- The disruptions to traffic and residents have been kept to a minimum
- The speed of installation is much higher than on any other large diameter CIPP project in Australasia
- The scale of the project makes it easily the largest CIPP project ever undertaken in this part of the world