A Numerical Study On Failure Behavior Of Jointed Rock Slope

H. S. Yang, W. B. Kim
Contribution of Rock Mechanics to the New Century
Discrete element method, Rock slope, safety factor

Stereographic projection and limit equilibrium method are two widely used methods to evaluate rock slope stability. Stereographic projection classifies failure modes by the joint set distribution characterization, and limit equilibrium method calculates the safety factor of slopes using ground parameters. However, the former is qualitative and the other is only applicable to typical models, so it is difficult to apply them on the field rock slope without other complement like numerical analyses.

In this study, the movement of slope was described with PFC2D, one of the discrete element methods using the working effect between particles.

Results were compared to those of analytical ones. The result of stability evaluation is similar to each other, and the failure points of unstable slope and plane failure aspect were found. These results showed that DEM analysis with stability evaluation and failure pattern determination can be a good tool to describe deformation of slope failure.

Keywords: rock slope, safety factor, discrete element method

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