对参数和模型的不确定性因素进行了分析,若不能正确地考虑参数和模型不确定性对基桩承载力的影响,则桩的安全性会被低估.为此,引入修正因子对承载力的试计比和变异系数进行修正,消除了参数和模型不确定性对可靠度分析产生的影响,并给出了修正后可靠度指标的计算方法.算例分析表明:修正后的可靠度指标大于原始可靠度指标,桩的安全性被正确估计,证明了提出方法的有效性. The parameters and uncertainty factors of the model are analyzed, if the parameters and model uncertainty can not correctly consider the impact on the bearing capacity of the pile, the safety of the pile will be underestimated. Therefore, the correction factor is introduced to the bearing capacity , And the coefficient of variation (CV) was corrected to eliminate the influence of parameter and model uncertainty on the reliability analysis, and the calculation method of the revised reliability index was given.An example analysis shows that the revised reliability index Greater than the original reliability index, the pile safety is correctly estimated, proving the effectiveness of the proposed method.