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提出考虑土体参数空间变异性的边坡可靠度及其敏感性分析多重响应面法,研究了该方法在考虑参数空间变异性边坡可靠度分析中的应用和边坡可靠度对空间变异性的敏感性。结果表明,自相关函数对边坡可靠度有一定的影响。基于指数型自相关函数得到的边坡失效概率明显偏小,由指数余弦型自相关函数得到的失效概率总体偏大,由高斯型、二阶自回归型和三角型自相关函数得到的边坡可靠度十分接近。此外,当土体参数间变异系数较小和波动范围较大时,自相关函数对边坡可靠度的影响更加明显。在失效概率较小的情况下,采用指数型自相关函数会高估边坡可靠度水平。
The slope reliability and sensitivity analysis considering the spatial variability of soil parameters are proposed. The application of this method to the reliability analysis of slope considering the parameter spatial variability and the application of slope reliability to spatial variability Sensitivity. The results show that the autocorrelation function has a certain influence on the slope reliability. The probability of slope failure based on exponential autocorrelation function is obviously smaller, and the failure probability obtained by exponential cosine type autocorrelation function is generally larger. The slope obtained from Gaussian, second-order autoregressive and trigonometric autocorrelation functions Reliability is very close. In addition, the effect of autocorrelation function on slope reliability is more obvious when the coefficient of variation between soil parameters is smaller and the fluctuation range is larger. In the case of small failure probability, using exponential autocorrelation function will overestimate the slope reliability level.