引入土层剖面随机场模型 ,把土性参数的点变异性和空间变异性联系起来。利用上海地区 1 7个典型场地的直固快剪试验资料的统计结果 ,提出土层抗剪强度指标点变异系数的置信区间 ,建议在可靠度分析中使用置信上限估计值并考虑空间平均后的折减效应。 The random field model of soil profile is introduced to relate the point variability and spatial variability of soil parameters. Based on the statistical results of the test data of straight-set fast shear in 17 typical sites in Shanghai, the confidence intervals of the coefficient of variation of the shear strength index of the soil are proposed. It is suggested that the confidence upper bound estimation should be used in the reliability analysis and the spatial average should be considered Reduction effect.