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滑坡的稳定性受诸多内外因素的影响,通过敏感性分析,可以对滑坡稳定影响因素的敏感性进行排序并检验其显著性。在简要介绍正交设计原理的基础上,结合下土地岭滑坡工程实例,选取了5个影响因素进行敏感性分析。极差分析及方差分析结果表明,敏感性由大到小依次为:滑带土内摩擦角φ、滑带土黏聚力C、滑坡地下水位H、地震加速度系数α、滑坡体容重γ。其中,前四者是该滑坡的高度显著影响因素,滑坡体容重γ对该滑坡无显著性影响。
The stability of landslide is influenced by many internal and external factors. Through sensitivity analysis, the sensitivity of landslide stability can be sorted and tested for its significance. Based on the brief introduction of the principle of orthogonal design, five influencing factors were selected for sensitivity analysis under the case of the Lower Landliping Landslide Project. The results of range analysis and ANOVA show that the sensitivities are as follows: the slip angle φ, the cohesion C, the groundwater level H, the acceleration coefficient α and the weight γ of the landslide. Among them, the first four are the significant height-affected factors of the landslide, and the weight of landslide γ has no significant effect on the landslide.