The granular anchor pile foundation (GAPF) is an improved foundation technique used to withstand compressive as well as tensile forces and effectively reduce the settlement of soil. In this paper, the behavior of a GAPF system was studied in sandy soil. Pull-out load tests were conducted on GAPF by varying different parameters viz. length of pile (250 mm, 350 mm and 450 mm), L/D ratio (7.5, 10 and 12.5) and group of piles (spacing 2D, 2.5D and 3D). The test results indicate that the pull-out capacity decreases with the increase in L/D ratio from 7.5 to 12.5. The group effect resulted in increased uplift load in comparison to that of a single GAP tested. Finite element analysis using PLAXIS 3D software had also been carried out to validate the results of physical model tests. On comparison of numerical and model study results, a reasonable agreement has been found.

颗粒锚桩基础（GAPF）是一种改进的基础技术，用于承受压缩力和拉力并有效减少土壤沉降。在本文中，研究了GAPF系统在沙质土壤中的行为。通过改变不同的参数在GAPF上进行拉出载荷测试。桩长（250 mm，350 mm和450 mm），L / D比（7.5、10和12.5）和桩组（间距2D，2.5D和3D）。试验结果表明，随着L / D的增加，拉拔能力下降。比率从7.5到12.5。与单个GAP测试相比，群体效应导致增加的提升负荷。还使用PLAXIS 3D软件进行了有限元分析，以验证物理模型测试的结果。通过数值和模型研究结果的比较，已经找到了合理的共识。