Canada
Project Highlights
- Emergency repair completed on schedule in below zero winter conditions to return the water main to service.
- PCCP reinforced using carbon fiber composites to replace losses in tensing system.
- Applied an NSF topcoat that complies with drinking water codes.
- Teamed with a local company to insure compliance with labor standards.
Project:
The Montreal AquaDuc Cathedral 60″D water main was approaching failure and required emergency repairs. Pre-stressing wire failure and internal cracks were noted in a 200′ section.
Solution:
Teamed with Construction ATA, a Montreal based contractor, the pipe repair was analyzed and an CFRP based repair was engineered to meet the water system’s structural and regulatory requirements.
Following City review and approval, the pipe surface was water blasted and the pipe joints (every 20′) were repaired and reinforced with CFRP strips.
Next, the pipe was wrapped internally with a multi-layer high strength CFRP to replace lost hoop strength in accordance with the engineering documents.
In the final step, an NSF topcoat was applied.
Results:
The FRP system restored the lost hoop strength without loss of pipe flow and pressure capacity. In addition, the work was completed using existing pipe access areas within the ten day shutdown period.