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在荷载传递法的基础上,提出了一种抗拔单桩变形的简便解析算法。此法可反映桩侧摩阻力逐渐发挥至极限状态的过程,且可用于分析抗拔单桩位于成层土中的情况。算法的关键是确定合理的抗拔桩极限侧阻,进一步明确了抗拔桩极限侧阻计算时各参数的取值,并指出应将抗压桩极限侧阻计算值的0.7倍作为抗拔桩的极限侧阻计算值。已有现场试验抗拔单桩实测数据和此算例对比分析表明此法是合理可行的且方便快速。
On the basis of load transfer method, a simple analytical algorithm for the deformation of single pile is proposed. This method can reflect the pile-side frictional resistance to the maximum state of the process, and can be used to analyze the anti-pull pile position in the stratified soil. The key of the algorithm is to determine the reasonable lateral resistance of overturning piles and to further confirm the value of each parameter when calculating the ultimate lateral resistance of overturning piles. It is pointed out that 0.7 times of the calculated value of ultimate lateral resistance of piles should be used as the anti- The limit side resistance calculation. There are field test data of single pile pull-ups and this example comparative analysis shows that this method is reasonable and feasible and fast.