三参数荷载传递函数计算大直径桩荷载-沉降曲线的研究

Calculating Load-Settlement Curve of A Large Diameter Pile By Three Parameters Load Transfer Function

以桩身和桩端的三参数荷载传递函数为基础,考虑桩-土(岩)共同作用,从理论上推导了桩身荷载与沉降关系的数值模拟的迭代模型。通过编制程序,计算得到桩顶的P-S曲线。经过对工程实例的计算与实测对比分析,计算得到的P-S曲线与实测曲线吻合。说明文章提出的方法对计算大直径单桩的荷载与沉降曲线具有较好的适用性,利用桩身和桩端的三参数荷载传递函数模型和迭代算法分析大直径单桩的承载性状是可行的。

Based on three parameters load transfer function of pile body and tip and considering the pile-soil interaction, the numerical simulation iteration model of load-settlement relationship of a single pile is developed from the aspect of theory, The P-S curve of such a pile top is obtained by programming, which can be used for calculating the load beating capacity of the pile, The results obtained by the pmposod method tally with the measured data, It is shown that the pmposod method is theoretically reliable, simple in application and useful in large diameter single pile load-settlement curve, Therefore, it is feasible to analyze the bearing capacity of a large diameter single pile by three parameters load transfer function model of pile body and pile top and numerical iteration method.