基于FLAC^(3D)强度折减法计算结果的影响因素分析

Analysis of Influence Factors of Calculation Results Based on FLAC^(3D) Strength Reduction Method

FLAC^(3D)强度折减法是分析边坡稳定性的有效手段。应用均匀设计的试验方法分析黏聚力、内摩擦角、弹性模量、泊松比、剪胀角、抗拉强度等因素对强度折减法计算结果的影响。试验结果表明:弹性模量、泊松比、剪胀角、抗拉强度对计算结果影响不明显,特别是弹性模量、泊松比、抗拉强度对计算结果的影响几乎为零;黏聚力、内摩擦角对计算结果有着显著的影响,并且内摩擦角对计算结果的影响程度大于黏聚力的影响程度。这一结论可以作为修正强度折减系数的依据,从而完善强度折减法。

FLAC^（3D） strength reduction method is a useful method to analyze slope stability. It analyzes the influence of cohesion, internal friction angle, elastic modulus, Poisson＇s ratio, dilatancy angle and tensile strength to calculation results based on strength reduction method with uniform design experiment method.The experimental results show that elastic modulus, Poisson＇s ratio, dilatancy angle and tensile strength don＇t have deep influence on the calculation results, especially elastic modulus, Poisson＇s ratio and tensile strength, they almost have no influence on the calculation results; Cohesion and internal friction angle have great influence on the calculation results, and the influence of internal friction angle on the calculation results is greater than the influence of cohesion. This conclusion can be used as the basis of revising strength reduction factor to improve the strength reduction method.