对桩尖位移等值法的改进

Improvement on Method of Equal Pile Point Settlement

在承受竖向荷载时,单桩承受桩端阻力和桩侧摩阻力。通过计算桩的荷载传递曲线,可得出桩侧摩阻力以及桩的轴力随单桩深度的变化关系,以及求解不同荷载对桩端阻力和桩侧摩阻力的影响。通过Excel以及VBA内嵌Excel编程对曹汉志提出的桩尖位移等值法进行探讨,经计算发现:只有桩的某一段,轴力、摩阻力、位移可以得到合理的结果,而其余桩段部分,结果与实际不相符合。探讨了计算结果不合理的原因,并对其方法进行改进,经检算,计算结果更符合工程实际。

Single pile is subject to pile-end resistance applied. By calculating load transfer curve of the pile, the pile change with the depth of the single pile could resistance and the pile shaft frictional resistance could and pile shaft frictional resistance when vertical load is how the pile shaft frictional resistance and axial force of be obtained and how different loads affect the pile-end be solved. With the discussion about method of equal pile point settlement proposed by Cao Hanzhi by use of Excel and VBA-embedded Excel programming, tentative calculation is carried out by this method. The result shows that only in certain pile section, axial force, frictional resistance and displacement could get proper results; but in other pile section, the results are inconsistent with the fact. The reason why the calculated results are improper is discussed and then the method is improved. Thus through examination, the calculated results are more consistent with the practical situation of engineering.