Simulating the uplift response of helical piles in sand using a hypoplastic model

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Helical piles, also known as screw piles, have emerged as a novel foundation technique for offshore structures. It is due to their potential to enhance uplift capacity and their environmental advantages, including minimal vibration, limited noise, and reduced soil spoil. In many applications, the uplift capacity of helical piles serves as the primary design criterion. This research conducted a numerical study to assess the load-displacement behaviour of single-helix helical piles subjected to uplift loading in dry dense sand using the Hypoplasticity model. Triaxial tests were initially simulated to calibrate and validate the models parameters and examine its predictive capabilities. Subsequently, the constitutive model was employed to simulate the response of helical piles under tension loading. The load-displacement profiles for helical piles were generated, and the corresponding uplift capacities were obtained. Comparing the numerical results against centrifuge test data revealed that the hypoplastic model provides a realistic representation of helical pile behaviour under loading conditions, highlighting its reliability in predicting the uplift capacity of helical piles.

5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)

13 - Developmental foundation and anchoring concepts: hybrid foundations, ring anchors, helical piles, torpedo, shared anchoring