基于正交试验法的滑坡影响因子敏感性分析—以山西灵石县回来峪滑坡为例

Sensitivity Analysis of Impact Factors of Landslide Based on Orthogonal Experiment—A Case Study of Huilai Valley Landslide in Lingshi County, Shanxi Province

摘要: 回来峪滑坡稳定性影响因子包括岩土体重度γ、粘聚力c 和内摩擦角φ，边坡高度h和爆破产生的加速度α等，为了确定各因子影响滑坡稳定性的显著程度，拟采用正交试验法对其敏感性定量分析。结果表明：岩土体内摩擦角和爆破产生的加速度对滑坡稳定性影响特别显著；粘聚力对滑坡稳定性影响显著；滑坡高度和岩土体重度对滑坡稳定性影响甚微，几乎没影响。在今后滑坡治理中，应当有所侧重，首要考虑岩土体内摩擦角的变化和爆破产生的冲击对滑坡稳定性的影响。

Abstract: The influencing factors of the stability of Huilai valley landslide include the weight of rock-soil body γ, cohesion c and internal friction angle φ, the height of slope h and the acceleration pro-duced by blasting. In order to determine the significant degree of landslide stability affected by various factors, the sensitivity analysis method is proposed to quantitatively characterize it. The results show that the internal friction angle of rock-soil body and the acceleration produced by blasting have especially significant influence on the landslide stability; The cohesion has some significant influence on the landslide stability; The landslide height and the weight of the rock-soil body make no difference to landslide stability. In the later landslide treatment, it should be focused on the impact of the change of internal friction angle and the wallop of blasting on the stability of landslide primarily.