Open AccessAnalysis of the Finite Element Strength Reduction Method to Slope Stability with a thin weak layer
Author(s) -
Hui Luo,
Chao Zeng,
He Xia,
Weipeng Li,
Qun Li
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/570/6/062014
Subject(s) - strength reduction , instability , safety factor , slope stability , stability (learning theory) , finite element method , slope stability analysis , limit (mathematics) , reduction (mathematics) , geotechnical engineering , mechanics , materials science , structural engineering , mathematics , geometry , physics , geology , mathematical analysis , engineering , computer science , machine learning
The strength of the weak layer not only controls the instability mechanism of the slope, but also the factor of safety to the slope. Studying the stability of the weak layer slope has important theoretical significance and practical engineering value. The instability mechanism and the factor of safety to slope stability with a thin weak layer were studied by finite element strength reduction method and limit equilibrium method. The results show that factor of safety to slope stability decreases with the strength of the weak layer decreases. When the strength of the weak layer is less than 0.6 times the strength of the soil, the instability mechanism of the slope changes from circular arc sliding to polygonal sliding, and its stability is controlled by the strength of the weak layer. The slope stability analysis by limit equilibrium method must be based on the analysis of the instability mechanism to accurately evaluate the slope stability. However, the finite element strength reduction method can be applied to calculate the factor of safety to slope stability and analyze the instability mechanism, and to previous limit equilibrium method.