某水电站2号变形体倾倒变形影响因素研究

Study on Toppling Deformation Influencing Factors of the No.2 Slope in a Hydropower Station

为定量研究反倾层状岩质边坡岩体倾倒变形的影响因素,以某水电站2号变形体为研究对象,采用离散单元法,通过单因素试验,研究了边坡几何特征参数、岩体物理力学参数、层面力学参数等因素对该变形体倾倒变形的影响规律,并在此基础上通过正交试验及灰色关联度分析法进行了影响因素敏感性分析。研究表明,在9个二级影响因子中,影响该变形体倾倒变形最为敏感的3个因素依次为层厚、倾角、坡角;在3个一级影响因子中,边坡几何特征参数最为敏感。

In order to quantitatively study the influencing factors of toppling deformation of the anti-dip bedded rock slope,the No.2 slope in a hydropower station is taken as research object,and the discrete element method and single factor test are adopted to study the influence law of the slope geometric characteristic parameters,rock physical and mechanical parameters,and bedding plane mechanical parameters on the toppling deformation of slope deformation body.On this basis,the sensitivity analysis of influencing factors is carried out by orthogonal experiment and grey correlation analysis method.The results show that,among the nine second-order influencing factors,the three most sensitive factors are strata thickness,slope angle and strata dip;among the three first-order influencing factors,the geometrical characteristic parameters of slope is the most sensitive.