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Real time validation of the installation of steel driven piles in muskeg ground conditions for Devon’s Jackfish source and disposal water wellsites.

Real time validation of the installation of steel driven piles in muskeg ground conditions for Devon’s Jackfish source and disposal water wellsites.
  • The initial project specified the use of steel driven piles. However, Precision suggested to our client that given the ground conditions, screw piles would be a better application due to their large end bearing capacity. We had witnessed the power line contractor utilizing screw piles throughout the area for power poles and realized that was the design to implement. The client refused due to a pile driver already being in the area.
  • During initial driven pile installation, it was apparent the ground conditions were very soft. With constant feedback from the piling contractor and some input from our third party civil designers, we were able to limit the driven depth, relying on skin friction even though the piles had not achieved refusal criteria. As a test, our client wanted one pile driven to refusal and after 40m+ it finally started to stiffen up. This single pile took nearly 4 hours to install due to having to add on additional pile material three times. The entire site required 60+ piles, so validation during install when encountering unknown ground conditions was very important to not only validate the design, but maintain cost and schedule.