The Challenges
This project, from the concept, was a challenge for any general contractor:
- Being over 500m in length constructed beneath Highway 7, one of the most heavily trafficked roads in Canada
- Built to a depth of approximately 30 below surface level and 25m below the water table of a confined aquifer
- In-situ concrete construction of a subway station that included an oval entrance 150 m in length with a 3000m³ cruciform supporting beam poured monolithically with an architectural fair face finish, to permit daylight at platform level
- Unique and partly conceptual finishes which were only able to be obtained in China, Germany and Mexico that were manufactured to precision tolerances.
PKoloncc directed the construction and final account negotiations whilst managing all the relationships for the project build applying good construction/ commercial knowledge of Infrastructure/transit projects and properly accounting for risks.
The Vaughan Requirement for PKoloncc
PKoloncc recognised that sub-trades were resourceful and included them in their management decisions, which resulted in the successful delivery of what would ultimately be recognised as an award-winning project. The expertise of PKoloncc in managing/supporting troubled projects in Canada and Internationally resulted in the most favourable outturn and included having the skills to manage:
- The installation and testing of a specialised cut-off wall to allow the aquifer to be drained within the confines of the project and the associated earthwork support,
- Construction of a substantial below ground reinforced concrete sub-structure,
- The manufacturing constraints for the unique finishes and overview to support the day-to-day construction,
- The schedule risks and mitigation resolutions,
- The contractual disputes including DRB strategy and presentation
