砂土中抗拔桩位移变形的分析

采用“套叠式”桩周土变形模式反映桩基荷载传递规律，推导出抗拔桩荷载一位移关系的理论解。文中考虑了桩的伸长变形，桩周上的不均匀性，桩周土的应力路径，桩周土的剪缩等因素的影响，并把理论解和模型试验结果进行了比较，两者较为相符，依据理论解，提出了一种便于在实际工程中设计抗拔桩的简易方法。

ANALYSIS OF DEFORMATION OF TENSION PILES IN SANDY SOIL

Based on an overlapped-form strain model of the soil sourrounding a pile, which represents the load transfer mechamism, a theoretical solution for the deformation of a tension pile under a given load is developed. In which, the effect of several factors, such as the tensile deformation of pile, the inhomogeneity of surrouding soil, the stress path of soil and the dilatancy of soil, may be taken into account, comparisons of the results of theoretical solution with those of the model test show genelally favorable agreement. Moreover, a simplified tension pile design method has been put forward on the basis of the theoretical solution.