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为了更有效地确定小子样下单桩承载力的设计值,利用勘探阶段的静力触探资料,结合《建筑桩基技术规范》中的经验参数法,先使用Grubbs方法剔除基桩参数数据中的疏失误差数据,得到单桩竖向承载力的验前信息,然后根据静载荷试验结果对先验信息进行调整,得到关于单桩竖向承载力的验后信息。经比较分析,利用Bayes方法估算的单桩极限承载力更加精确,置信区间更加集中,从而为小子样条件下单桩竖向承载力设计值提供了理论参考依据。
In order to more effectively determine the design value of bearing capacity of a single pile under a small sample, using the static detective data in the exploration stage and the empirical parametric method in “Technical Specifications for Construction Pile Foundations”, the Grubbs method The error information of the single pile is obtained, and the prior information of the vertical bearing capacity of the single pile is obtained. Based on the static load test results, the prior information is adjusted to obtain the post-inspection information about the vertical bearing capacity of the single pile. After comparative analysis, the ultimate bearing capacity of single pile estimated by Bayes method is more accurate and the confidence intervals are more concentrated, which provides a theoretical reference for the design value of vertical bearing capacity of single pile under small sample conditions.