基于灰色关联分析方法对边坡稳定性的影响因素敏感分析

Sensitivity analysis of influencing factors of slope stability based on grey relational analysis method

边坡稳定性的影响因素很多,且影响程度各不相同。本文依据ABAQUS有限元分析软件,通过模拟不同参数下土体的粘聚力、内摩擦角、剪胀角、泊松比、弹性模量,计算边坡安全系数,利用灰色关联分析方法得出不同参数的影响程度,依次为内摩擦角>粘聚力>剪胀角>泊松比>弹性模量,因此在边坡设计及稳定性评价中应慎重选取土体的强度指标。灰色关联分析结果可以为边坡设计和施工提供一定的指导与分析价值。

There are many factors influencing the slope stability, and the degree of influence is different;Based on ABAQUS finite element analysis software, this paper calculates the slope safety factor FV by simulating soil cohesion,internal friction angle, shear expansion angle, Poisson’s ratio and elastic modulus under different parameters. The influence degree of different parameters is obtained by using the grey correlation analysis method, and the sequence is internal friction angle > cohesion > shear expansion angle > Poisson’s ratio > elastic modulus of soil mass. Therefore, in the design and stability evaluation of slope, the strength index of soil mass should be carefully selected. The results of grey correlation analysis can provide guidance and analysis value for the slope design and construction.