Abstract: The paper describes the reliability index analysis of tension piles with Monte-Carlo method based on engineering examples. The computation results testify that tension piles tend to be more safe if uncertainty of soil bearing capacity is taken into account ,the reliability index is sensitive to the calculation mode and the average and deviation coefficient of the reduction coefficient of lateral friction resistance of piles without regard to uncertainty of soil bearing capacity, and the deriati..

Key words: Monte-Carlo method, tension piles, reliability index, safety factor

摘要： 运用蒙特卡罗法,并结合工程实例,对抗拔桩可靠度指标进行分析.计算表明:考虑场地承载力不定性较未考 虑时桩更趋于安全,不考虑场地承载力不定性时可靠度指标对计算模式和桩侧摩阻力折减系数的均值和变异系数 均敏感,荷载变异系数对可靠度指标有较大影响.此外,得出可靠度指标较安全系数更能符合抗拔桩的客观实际.

关键词: 蒙特卡罗法, 抗拔桩, 可靠度指标, 安全系数