Abstract: In order to study the effect of soil parameters such as cohesion force (c), internal friction angle (φ) and density of the soil (γ) on the reliability index of loess slope strengthened by frame anchors, based on the limit equilibrium theory, relying on the slope engineering example, using GeoStudio 2012 finite element software, the calculation model of reinforced slope is established, and the above analysis process is completed by Monte Carlo test simulation. The results show that when the coefficient of variation of two parameters is fixed and the coefficient of variation of the other parameter is changed, the coefficient of variation of φ has the greatest influence on the reliability index of the slope, and the coefficient of variation of γ has the least influence on the reliability index of the slope. When fixing the coefficient of variation of one of the parameters and the coefficient of variation of the other two parameters change simultaneously, the coefficient of variation of the internal friction angle φ and the density of the soil γ simultaneously has the greatest influence on the reliability index of the slope. The coefficient of cohesion force c and density of the soil γ have the least influence on the reliability index of the slope.

Key words: frame anchor, loess slope, coefficient of variation, reliability index