Delayed Slope Instabilities in Earth Fill Dams due to Creep: A Proposed Application of the Time-Dependent Model for Structured Soils (TMS)
Publication: Geo-Congress 2024
ABSTRACT
An earth fill dam in Canada exhibited significant deformation in the upstream side after 50 years of satisfactory operation. Studies revealed that the loss of soil shear strength was brought by creep movement. However, the studies were unable to simulate the strain softening of the soil coupled with time-dependent creep movement. To address this, the use of time-dependent model for structured soils (TMS) was proposed. It is an incremental plasticity time-dependent constitutive model based on the modified cam clay. It incorporates the principles of critical state soil plasticity, which can systematically emulate the primary, secondary, and tertiary creep phases under increasing stress levels. The research would allow the assessment of the long-term slope stability of water-retaining structures and the development of remedial measures for existing earth fill dams that do not satisfy modern long-term slope stability dam safety requirements.
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Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 186 - 195
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Continuum mechanics
- Creep
- Dams
- Deformation (mechanics)
- Earthfill dams
- Embankment dams
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Materials characterization
- Materials engineering
- Measurement (by type)
- Models (by type)
- Rheology
- Slopes
- Soil deformation
- Soil mechanics
- Soil properties
- Soil strength
- Soil structures
- Solid mechanics
- Structural engineering
- Structural mechanics
- Structural models
- Structures (by type)
- Time dependence
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