Helical anchors are bearing elements that can resist uplift loads by a combination of shaft and helical plate bearing. The application of helical piles as offshore wind turbine foundations has recently become interesting. However, large size of such structures limits the possible physical modeling in a geotechnical centrifuge. In the current study, the limits of physical modeling concerning particle size effect on the uplift capacity of helical piles were evaluated. The modeling of models technique was employed. The contribution of the shaft and helical plate to the anchor uplift capacity was also studied. The results indicate that small ratios of helical plate diameter to shaft diameter lead to higher contribution of the shaft to the total anchor capacity. It was also found that scale effects could be safely ignored if effective helical radius to the mean grain size of the sand is greater than 16. The normalized mobilization distance and dimensionless breakout factor were in good agreement with the previous researches. The limits reported here could contribute to a more reliable physical modeling of helical piles and anchors in the future researches.

螺旋形锚是轴承元件，可通过轴和螺旋板轴承的组合来抵抗抬升载荷。螺旋桩作为海上风力发电机基础的应用近来引起人们的兴趣。然而，这种结构的大尺寸限制了岩土离心机中可能的物理建模。在当前的研究中，评估了物理模型在颗粒尺寸对螺旋桩抗拔能力的影响方面的局限性。采用模型技术的建模。还研究了轴和螺旋板对锚固力的贡献。结果表明，较小的螺旋板直径与轴直径之比会导致轴对总锚固能力的更大贡献。还发现，如果有效螺旋半径对砂子的平均晶粒尺寸大于16，则可以安全地忽略水垢效应。归一化的动员距离和无因次突破因子与先前的研究很好地吻合。此处报告的限制可能有助于在将来的研究中对螺旋桩和锚的物理模型进行更可靠的建模。