Axial Analysis of Small Capacity Helical Piles in Saemangeum Based on the Load Transfer Method
Publication: Geo-Congress 2024
ABSTRACT
Recently, load transfer criteria for large-capacity helical piles have been proposed based on the 5% helix diameter (Dh) displacement criterion. However, helical piles used as foundation for solar farms in Saemangeum were typically small. The topmost helix is located at shallower depths to provide lateral resistance against wind loading, and the spacing ratio of the helices was less than 3.0Dh. To investigate the factors that affect axial capacity, the load transfer method is used to analyze the helical piles in the compression and uplift tests. It was found that the individual bearing method did not well represent the measured capacity of the helical piles based on the 0.05Dh criterion. In the calculation of the uplift capacity, the lead helix is usually assumed to provide most of the resistance; however, it was necessary to neglect the top helix in this study due to the unique configuration of the helical piles.
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Geo-Congress 2024
Pages: 257 - 266
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Published online: Feb 22, 2024
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