【摘要】 螺槽桩是一种经济低碳的新型预制桩，通过桩侧特殊螺槽结构改善桩体承载性能.通过模型试验与有限元计算，分析螺槽桩与等截面桩荷载传递特性差异，引入材料利用率概念，探讨不同螺槽参数下桩体承载特性.结果表明：螺槽桩竖向沉降曲线呈缓变趋势，其极限承载力为等截面桩的1.85倍，材料利用率为等截面桩的2.85倍；螺旋形槽体构造增大了桩-土接触面积，提升了侧阻力，螺槽端与桩端形成多点端阻承载模式增强端承力；增加螺槽内径桩体承载能力（提升了337.2%），然而材料利用率比下降了133.8%；存在最优螺槽间距使得材料高效利用，螺槽厚度与内径比大于1时会导致材料利用率降低；增大螺槽宽度可显著提升螺槽桩承载能力，但会导致材料利用率出现先增后减的趋势.更多还原

【Abstract】 Screw groove piles, a new type of precast pile, are economically and environmentally friendly, and they can improve the load-bearing performance of the pile through a unique screw groove structure. Through model tests and finite element calculation, the difference in load transfer characteristics between screw groove piles and equal section piles is analyzed, and the concept of material utilization is introduced to explore the bearing characteristics of piles with different screw groove parameters. The results demonstrate that the vertical settlement curve of the screw groove pile exhibits a gradual trend, with an ultimate bearing capacity 1.85 times higher than that of the equal section pile, and its material utilization rate is 2.85 times higher. The screw groove structure increases the pile-soil interaction surface, thereby increasing the skin friction resistance of the pile. The screw groove surface end resistance and pile tip resistance form a multipoint vertical bearing mode. Increasing the inner diameter of the screw groove piles increases the load-carrying capacity by 337.2%, but the material utilization ratio is decreased by 133.8%. The existence of optimal screw groove spacing enables efficient material utilization, while a groove thickness-to-inner diameter ratio greater than 1 leads to reduced resource utilization efficiency. The bearing capacity of screw piles can increase significantly with the increase of screw groove width; however, their material utilization initially increases and then decreases.更多还原