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Elasto-plastic solution for undrained cylindrical cavity expansion in refuse soil
Weimin Zhang1, Fengwei Guo2, Yun Zhao3
1Jinhua University of Vocational Technology, Jinhua, 321007, China.
Scientific Reports
|December 3, 2024
Summary
This study proposes an elasto-plastic model for undrained cylindrical cavity expansion in fiber-reinforced refuse soil. Results show unique soil behavior, differing significantly from ordinary soils, especially with fiber reinforcement.
Area of Science:
- Geotechnical Engineering
- Soil Mechanics
- Constitutive Modeling
Background:
- Infrastructure projects increasingly face challenges on landfill sites.
- Existing models may not fully capture the behavior of refuse soil.
Purpose of the Study:
- To develop an elasto-plastic theoretical solution for undrained cylindrical cavity expansion in refuse soil.
- To incorporate the reinforcement effect of fibers and large deformation theory.
- To analyze the unique mechanical response of refuse soil.
Main Methods:
- An elasto-plastic constitutive model for refuse soil considering fiber reinforcement.
- Application of large deformation theory.
- Validation against existing solutions (e.g., modified Cam-clay model).
Main Results:
- Refuse soil exhibits distinct columnar pore expansion behavior compared to ordinary soil.
- Only slurry-like components reach the critical state near the pore.
- Fiber reinforcement significantly influences the elastic and plastic stages before reaching the critical state line.
Conclusions:
- The proposed model accurately captures the complex behavior of refuse soil.
- Fiber reinforcement plays a crucial role in the mechanical response of refuse soil.
- Special attention is needed for the unique behavior of refuse soil in geotechnical engineering applications on landfills.
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