Use of optimization methods in the calculation of slope stability

Abstract

This article focuses on studying and identifying factors that contribute to ground movement and determining appropriate methods for verifying slope stability. Depending on the type of soil, the geometry of the slope and the type of work to be carried out, it is appropriate to choose a suitable technical solution, adapted both to the nature of the soil in place and to its environment. The major techniques that can be used to increase the mechanical properties of soils are the modification of the internal structure of the existing soil and the reinforcement of the soil by the addition of materials and inclusions. These techniques make it possiblte to improve the compactness and bearing capacity of the soil in place. The case presented in this research was studied using a two-dimensional finite element model, to study the effect of various mechanical characteristics of the soil, including cohesion (C), friction angle (φ), the reference module (Eref) and the backfill volume. We examined the influence of the coupling on the safety factor and the location of the sliding surface to have an optimal slope design. To do this, we formulated the problem into an optimization framework using MINITAB 19 software. This framework will use a design of experiments (DOE) approach to identify the optimal combination of factors ensuring slope safety. The results obtained will be analyzed to evaluate the effectiveness of the DOE method in determining the most favorable combination of parameters. We expect the mechanical properties of the slope to have the most significant influence on the factor of safety and the location of the sliding surface.