## 3 Numerical Modeling and Parametric Analysis Parameter Selection  
### Numerical Modeling and Analysis of a Typical Case  
In practice, the strength reduction method can be combined with finite element numerical simulation software, such as Flac 3D and PLAXIS, to analyze and calculate the slope stability. In this study, Flac 3D 6.0 numerical software is used to establish the corresponding model to analyze the stability of the palm face under different cases with different reinforcement arrangements. By using the Fish language to write the strength reduction command, the internal friction angle and cohesion of the reinforcement and the slope soil are reduced to determine the safety coefficient of the horizontally reinforced slopes in the critical instability state, and the accuracy of the safety coefficient calculation is \(1\times 10^{-3}\), which can satisfy the requirements of the actual engineering accuracy. The Mohr-Coulomb model is a kind of principal constitutive model commonly used in the process of geotechnical analysis, and the Mohr-Coulomb model is used in this analysis for modeling and analysis, and the mechanical parameters of the soil and reinforcement are selected according to the actual engineering conditions. According to the results of the investigation report of the Guiqiao Road Station project, it can be concluded that the area where the upper step method is located in the project, the soil layer, is powdery clay, and the mechanical parameter properties are as follows: gravity 17.3 kN/m\({}^{3}\), compression modulus 3.34 MPa, Poisson's ratio 0.33, internal friction angle 17.3\({}^{\circ}\), and cohesive strength 20 kPa. In order to analyze the influence of the horizontal reinforcement of the MJS method on the safety coefficient of the slope, the typical Case 1 of 0.5 m height of reinforcement arrangement, 1m diameter of reinforcement, 2.5 m spacing of reinforcement, 45\({}^{\circ}\) angle of slope angle, and 4 m height is selected to calculate the safety coefficient and analyze the damage form. For the reinforced reinforcement after the MJS method, the internal friction angle and cohesion are taken to be two times of the original soil for analysis. According to the simplified analysis principle in Section 2.1, the front part of the model is a free boundary, the bottom and both sides of the boundary are not allowed to occur with normal displacement, and the boundary at the back of the model is not allowed to occur perpendicular to the normal displacement. The tetrahedral mesh is used to divide the model mesh, and taking into account the calculation accuracy and efficiency, the mesh size is taken as 0.1 m, and the corresponding geometrical model is shown in Figure 4 by utilizing the griddle to divide the model mesh. After analyzing and calculating, in the case of natural slope release without solidification in the soil in front of the palm face, the corresponding safety coefficient of the slope system is calculated to be 0.314, and the safety coefficient analyzed in the case of the above typical solidification arrangement is 0.812, where it can be seen that the construction of the horizontal solidification of the MJS can play a good role in improving the safety of the slope, and in the typical solidification arrangement condition mentioned above, the plastic strain diagram of the model after analysis is shown in Figure 4. The plastic strain diagram of the analyzed model is shown in Figure 4. The slope along the leading edge of the part of the slippery face damage and in the foot of the slope at the most significant plastic deformation can be seen, which is more consistent with the actual case in the application of the strength reduction method, and the addition of the MJS zone for the final destruction of the slope damage mode does not have a significant impact.