Side Slope Stability Analysis during Landslide Dam Breaching Using SPH Method
Publication: Geo-Risk 2023
ABSTRACT
Understanding the mechanisms of side slope failure is of great significance in the study of landslide dam breaching. Smoothed particle hydrodynamics (SPH) is used to simulate the side slope failure of a landslide dam. The Drucker–Prager elastic–plastic model is implemented into the SPH to capture dam soil behavior. An artificial stress algorithm is applied to overcome the numerical instability in cohesive soils due to tensile forces between SPH particles. Uniform particle distribution method is implemented to improve the stability of stress calculations of adjacent solid boundary particles. The influence of the distribution and composition of soil materials as well as the initial erosion depth is investigated in landslide dams. It is found that the initial internal angle and soil cohesion strongly affect the plastic zone formation, the volume of subsequent dam failure, and the final geometry of the dam breach. The surface sliding and dam instability of dam soils are observed simultaneously in the model. The amount of slope sliding coming from the side slope failure increases with the initial erosion depth.
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REFERENCES
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Information
Published In
Geo-Risk 2023
Pages: 280 - 290
History
Published online: Jul 20, 2023
ASCE Technical Topics:
- Analysis (by type)
- Dam failures
- Disaster risk management
- Disasters and hazards
- Earth materials
- Engineering fundamentals
- Engineering materials (by type)
- Failure analysis
- Failures (by type)
- Geohazards
- Geomaterials
- Geomechanics
- Geotechnical engineering
- Landslides
- Man-made disasters
- Materials engineering
- Particle size distribution
- Particles
- Slope stability
- Slopes
- Soil mechanics
- Soil properties
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