Axial Performance of Continuous-Flight Pile in Frozen Soil ...

• Main Author: Gao, Shuai
• Format: Text
• Language: unknown
• Published: University of Alberta Library 2023
• Subjects: Arctic
• Online Access: https://dx.doi.org/10.7939/r3-wsmq-8a58; https://era.library.ualberta.ca/items/9382dfe9-a581-41a8-9a08-154033e34e3b

Piles are commonly used in the Canadian Arctic as a foundation solution. Steel pipe shaft pile, which is a conventional pile type in the Arctic, is placed in an oversized pre-drilled hole and then the annulus is backfilled with gravel slurries or grout designed to cure (i.e., a process called freezeback) at cold temperatures. However, the construction is labor-intensive and freezeback is time-consuming. Additionally, conventional steel pipe piles may provide lower adfreeze strength between backfill and frozen soil than other methods. As an innovative foundation option, continuous-flight piles consist of a steel tube with continuous spiral flights and a tapered lower segment. These piles can be installed by applying a compressive load and torque to the pile head. Owing to the difference in pile construction and soil-pile interface, continuous-flight piles have advantages such as large capacities, rapid installation, lightweight, and reusability in non-frozen soils. Consequently, continuous-flight piles may ...