Stability Analysis of an Undrained Slope with a Single Weak Layer

Slope stability analysis is an important engineering problem in Taiwan. We usually use Limit Equilibrium Method (LEM) or Finite Element Method (FEM) to analyze the safety of slope. However, this analysis process could cost lots of time in finding the weakest section of the slope if we want to get more accurate results. Thus, improving efficiency of the analysis is one of the most important issue of the slope stability. For real slope, it is common to see a situation that the slope slides along a weak layer which shear strength is weaker than the soil around it and causes failure, but it still does not have complete study to explain the effect of this situation. Therefore, in this study, we would consider the slope with a weak layer and analyze the influence of the slope stability. In addition, we built a number of the training sample of the slope and use ABAQUS 2D, FEM numerical software, to analyze these sample. After analyzing all training sample, we would use these results to build an analysis method of the slope with a weak layer by correction factor of Ns, support vector regression (SVR), and support vector classification (SVC). In the future, we hope that the analysis method can not only estimate slope stability more easily and more quickly, but also understand the type and the effect range of the slope failure, and get more accuracy assessment with slope stability.