Geo-Congress 2020
A New Approach to Simulate Suffusion Processes with MPM
Publication: Geo-Congress 2020: Modeling, Geomaterials, and Site Characterization (GSP 317)
ABSTRACT
Internal erosion is a potential failure mode of earth dams and levees and consists of the mobilization of solid grains as water flows through granular material. This paper focuses on the study of the suffusion mechanism in internally unstable soils. Typically these soils are broadly graded in nature, in which a finer fraction is subjected to erosion and is transported through the voids in the matrix of coarser particles. The material point method (MPM) has shown promise in large deformation modeling of geotechnical problems. Here, an extension of the two-phase double-point MPM formulation is proposed to model the suffusion internal erosion mechanism. MPM is a particle-based method defined in a continuum framework, and the two-phase double-point approach uses two separate sets of material points to represent the liquid and solid phases. Transferring mass between the two layers of material points has applications in fines migration in internal erosion, selective transport in sediment transport, and dissolution of solids. The numerical results demonstrate the capability of the formulation to transfer mass between solid and liquid phases while ensuring that the total mass is automatically conserved.
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Information & Authors
Information
Published In
Geo-Congress 2020: Modeling, Geomaterials, and Site Characterization (GSP 317)
Pages: 482 - 490
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8280-3
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
ASCE Technical Topics:
- Dam failures
- Disaster risk management
- Disasters and hazards
- Engineering fundamentals
- Engineering materials (by type)
- Erosion
- Failures (by type)
- Flow simulation
- Geology
- Geotechnical engineering
- Granular materials
- Man-made disasters
- Material failures
- Materials characterization
- Materials engineering
- Materials processing
- Models (by type)
- Particles
- Piping erosion
- River engineering
- Sediment
- Sediment transport
- Water and water resources
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