Application of Limit Equilibrium FEM Method to the Slope

Abstract:

The limit equilibrium FEM method is a common method using the result of stresses fields obtained from numerical calculation to get resistant sliding force and driving sliding force on the dangerous sliding surface to analyze the stability of slope. The safety factor is the ratio of resistant sliding force to driving sliding force on the most dangerous sliding surface.When compares limit equilibrium FEM method with the rigid body limit equilibrium method, its applicability needs to be verified. Taking a project as an example, this work uses the two methods to analyze the stability of the slope. After calculating, two different safety factors on the sliding surface were got, and the reasons inducing the difference of the safety factors were analyzed. The result showed the safety factor calculated from the limit equilibrium FEM method is much closer to the real situation especially when some parts of the soil are in plastic state. It is mainly because the limit equilibrium FEM method takes the coordination of deformation into consideration. Then two conditions: nature and rain are calculated to analyzed the slope stability. It made a judgment of the stability of the slope and gave a beneficial conclusion to the project.

• Periodical: Advanced Materials Research (Volumes 926-930)
• Pages: 524-528
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.926-930.524
• Online since: May 2014
• Authors: Yan Zhai, Wei Ya Xu*, Chong Shi, Sheng Nian Wang, Hai Long Zhang
• Keywords: Limit Equilibrium FEM Method, Rigid Body Limit Equilibrium, Safety Factor, Slope Stability

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