基于正交设计的软弱夹层岩质边坡影响因素分析

Influencing Factors of Rock Slope with Weak Interlayer Based on Orthogonal Design Method

软弱夹层是岩质边坡发生失稳破坏的重要原因。鉴于正交设计方法在边坡敏感性分析中的优势,将该方法引入到软弱夹层岩质边坡稳定性分析中。选取了夹层厚度、夹层倾角、夹层粘聚力、夹层内摩擦角等4个因素进行软弱夹层岩质边坡敏感性的正交试验分析。结果表明:软弱夹层相关参数对软弱夹层岩质边坡稳定的影响程度为:软弱夹层倾角影响程度最大,软弱夹层内摩擦角其次,软弱夹层粘聚力较小,软弱夹层厚度影响程度最小;正交设计法是适合于软弱夹层岩质边坡影响因素敏感性分析的方法。

Weak interlayer is the important reason of instability and failure of rock slope. The orthogonal design method has great advantages in the sensitivity analysis of slope stability, therefore, the method is applied to the analysis of rock slope stability with weak interlayer. The thickness of weak interlayer, the inclination angle of weak interlayer, the cohesive strength of weak interlayer, the friction angle of weak interlayer of four factors were selected to carry out the stability analysis of rock slope with weak interlayer based on the orthogonal design method. The analysis results show that the related parameters of weak interlayer on the influence degree of rock slope with weak interlayer stability： the inclination angle of weak interlayer has the greatest influence, the friction angle second, the cohesive strength is smaller, the thickness of weak interlayer has the minimum influence. The orthogonal design method is suitable for the influence of the weak interlayer rock slope factor sensitivity analysis.