中文摘要：

为了使人工挖孔桩设计由确定性设计法过渡为概率极限状态设计法,结合沈阳市36根人工挖孔桩试桩资料,利用无量纲随机变量的极限状态方程进行了可靠度分析,采用JC法计算了挖孔桩的可靠指标;得到了按照辽宁省地方建筑地基基础规范挖孔桩的目标可靠指标为2.51,抗力分项系数为1.54;研究结果表明,荷载效应比和荷载组合形式对可靠指标有一定程度的影响,抗力概型分布对可靠指标的影响较大,荷载效应比和荷载组合型式对抗力分项系数产生的影响较小。

英文摘要：

In order to make the design of manual hole digging piles transit from the deterministic design method to the probability limit states method,based on the static test data of 36 piles in Shenyang,a reliability analysis of the vertical bearing capacity of single pile is made by utilizing the limit state equation of the dimensionless random variables,and the index of reliability of single pile is calculated by JC method.Furthermore,it is obtained that the target index of reliability of the pile is 2.51 and the resistance partial coefficient of the pile is 1.54 in the technical code for building foundations of Liaoning province.It is shown that the influence of loading effect ratio and different load combinations on the reliability index is to a certain extent,the influence of distribution types of resistance on the reliability index is remarkable,and the influence of loading effect ratio and different load combinations on the resistance partial coefficient is weak.