考虑桩土滑移和整体刚度动态调整的群桩分析方法

Analytic method of pile groups considering slipping between piles and soil and dynamic adjustment of integral stiffness

摘要: 在分析了大型群桩研究现状的基础上,提出了考虑桩土滑移和群桩桩顶整体刚度动态调整的分析计算方法。并将本文方法与一个离心模型试验结果进行了对比,论证了本文方法的正确性。在此基础上,分析了刚性承台条件下超大群桩基础的荷载位移曲线变化规律以及桩顶荷载分布规律受桩土刚度比、桩长、桩径、桩距、桩数、土性等因素的影响规律。

Abstract: Based on the current studies on large pile groups,an analytical method considering slip of piles and soil and dynamic adjustment of integral whole stiffness of pile groups was put forward.The calculated result was verified by use of centrifuge tests.Furthermore,it was shown that load-displacement of pile groups and load distribution on pile top were affected by properties of soil and stiffness ratio of piles to soil,and by length,diameter,spacing,and number of piles.