Pile instability due to buckling is considered to be one of the most important causes of superstructures failures especially in bridges and wind turbines. The mechanism of load-transfer of partially embedded piles in sand subjected to axial load to surrounded soil and the corresponding deformation are important aspects of pile design. In the present research, an experimental model was developed to measure the lateral displacement of piles subjected to axial loads. The experimental results indicated that the post buckling load of partially embedded pile was enhanced up to five times of the buckling load of free case. Two proposed formulas based on the laboratory experiments were induced to determine post buckling load of the partially embedded pile. The predicted buckling capacity of piles was compared to the experimental buckling load, which showed a good agreement.

屈曲引起的桩不稳被认为是上部结构破坏的最重要原因之一，尤其是在桥梁和风力涡轮机中。承受轴向载荷的砂土中部分埋入桩的荷载传递机制以及相应的变形是桩设计的重要方面。在本研究中，开发了一个实验模型来测量承受轴向载荷的桩的横向位移。实验结果表明，部分埋置桩的后屈曲载荷提高到自由箱的屈曲载荷的五倍。引入了两个基于实验室实验的拟议公式来确定部分埋置桩的后屈曲荷载。将预测的桩屈曲能力与实验屈曲载荷进行比较，