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US 9,957,684 B2Granted
Systems and methods for installing pile structures in permafrost
AssigneeAmerican Piledriving Equipment, Inc.
InventorsPaul Suver, Matthew E. Fenwick
Life of this patent
Estimating the term…
Abstract
A pile system for permafrost comprising a pilot hole, at least one pile, and frozen slurry. The pilot hole is formed to a pilot hole depth. The at least one pile is arranged at least partly within the pilot hole and extends to a pile string depth. The frozen slurry is within the pilot hole and is at least partly around the at least one pile.
Claims14
A method of forming a pile system for permafrost comprising the steps of:
- rotating a mandrel to form a pilot hole to a pilot hole depth, where friction created by engagement with the mandrel and the permafrost melts liquids in the permafrost, thereby creating a flowable slurry at least partly within the pilot hole;
- removing the mandrel from the pilot hole;
- while the slurry is at least partly flowable, arranging at least one pile at least partly within the pilot hole to a pile string depth;
- and
- allowing slurry to freeze within the pilot hole at least partly around the at least one pile.
2 more elements
A method of forming a pile system for permafrost comprising the steps of:
- providing a mandrel;
- providing a lead pile;
- providing at least one extension pile;
- operating a drive system to rotate the mandrel to form a pilot hole to a pilot hole depth, where friction created by engagement with the mandrel and the permafrost melts liquids in the permafrost, thereby creating a flowable slurry at least partly within the pilot hole;
- removing the mandrel from the pilot hole;
- while the slurry is at least partly flowable, operating the drive system to rotate the lead pile such that the lead pile is arranged at least partly within the pilot hole;
- connecting the at least one extension pile to the lead pile to form at least part of a pile string;
- while the slurry is at least partly flowable, operating the drive system to rotate the at least one extension pile such that the lead pile is arranged within the pile hole and the at least one extension pile is arranged at least partly within the pilot hole;
- and
- allowing slurry to freeze within the pilot hole at least partly around the lead pile and the at least one extension pile.
7 more elements
Dependencies are inferred from the claim text.