根据对 78根钻孔桩和 12 8根打入桩的统计分析 ,并使用校准法对现有钻孔桩和打入桩的抗力分项系数进行了研究 ,结果表明 ,总抗力的分项系数受分布类型影响较大。文中提出由递推法分层土模型计算分抗力分项系数 ,物理概念明确计算方法合理 ,结果可信 Based on the statistical analysis of 78 bored piles and 128 piled piles, the calibration method is used to study the resistance coefficients of existing bored piles and driven piles. The results show that the partial coefficients of total resistance Affected by the distribution type. In this paper, we propose to calculate the sub-coefficient of sub-resistance by the recursive layered soil model. The explicit calculation of the physical concept is reasonable and the result is credible