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Updated: May 30, 2026
11:28
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
One-dimensional model for municipal solid waste (MSW) settlement considering coupled mechanical-hydraulic-gaseous
Xiaodong Liu1, Jianyong Shi, Xuede Qian
1Geotechnical Engineering Research Institute, Hohai University, Nanjing 210098, China. liuxdong@126.com
Waste Management (New York, N.Y.)
|August 13, 2011
Summary
A new model predicts municipal solid waste (MSW) settlement by coupling mechanical, hydraulic, and gaseous effects with biochemical degradation. This model accurately simulates pressure changes and waste settlement, validated by laboratory experiments.
Area of Science:
- Geotechnical Engineering
- Environmental Engineering
- Waste Management
Background:
- Municipal solid waste (MSW) settlement is a critical factor in landfill design and management.
- Understanding the coupled mechanical, hydraulic, and gaseous effects, along with biochemical degradation, is essential for accurate settlement prediction.
- Existing models may not fully capture the complex interactions within MSW.
Purpose of the Study:
- To propose a novel coupled model integrating mechanical, hydraulic, gaseous, and biochemical processes for MSW settlement simulation.
- To predict the distributions of gas and water pressure and total waste settlement.
- To develop a new formula for simulating biochemical degradation based on experimental data.
Main Methods:
- Development of a coupled mechanical-hydraulic-gaseous effect and biochemical degradation model.
- Simulation of MSW settlement using the developed model.
- Laboratory-scale waste settlement experiment using synthetic MSW.
- Model verification using experimental data and proposal of a new biochemical degradation formula.
Main Results:
- The model successfully simulates and predicts MSW settlement, gas, and water pressure distributions.
- Excess pore gas pressure increases rapidly due to degradation, peaks, and then dissipates.
- Excess pore water pressure dissipation is slower than gas pressure, influenced by MSW hydraulic conductivity.
Conclusions:
- The coupled model provides a robust tool for simulating and predicting MSW settlement.
- Biochemical degradation significantly influences pore gas pressure dynamics.
- The developed model and formula offer improved accuracy for waste management strategies.
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