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Analysis on slope stability by anchorage based on soil creep with flood effect
1School of Building Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, 411104, China.
Heliyon
|September 17, 2024
Summary
Flood impacts slope stability by reducing the safety factor and increasing landslide risk. This study analyzes flood forces and soil aging to improve slope stability assessments and anchorage design.
Area of Science:
- Geotechnical Engineering
- Civil Engineering
- Environmental Engineering
Background:
- Slope stability is crucial for infrastructure safety.
- Flooding significantly impacts soil properties and slope integrity.
- Aging soil characteristics exacerbate slope failure risks.
Purpose of the Study:
- To analyze the adverse effects of flood forces on slope stability.
- To develop analytical expressions for flood-induced forces and erosion.
- To establish a model for aging soil shear strength and slope stability.
Main Methods:
- Limit equilibrium theory and aging soil shear strength characteristics.
- Analytical expressions for buoyancy, capillary, hydrodynamic, and impact forces.
- Nonlinear accelerated creep model and power function for shear strength index.
- Development of safety factor formula considering flood loading and aging.
Main Results:
- Shear failure initiates at the slope foot and propagates upwards, leading to landslides.
- Slope safety factor can decrease by over 20% due to flood scour and impact.
- Anchorage force compensation value increases with time, with nonlinear rate changes.
Conclusions:
- Flood effects, including scour and impact, significantly reduce slope safety factors.
- Time-dependent soil aging and nonlinear creep must be considered in stability analysis.
- Anchorage systems require time-varying compensation values for effective slope stabilization.
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