Permeability measurement in porous media under unsaturated paths

Understanding the flow through porous media when it is part of geotechnical-hydraulic structures has been a scenario calculated from the most unfavorable situation. The passage of water through the porous skeleton of the soil is considered in a saturated condition. Few studies to date consider parti...

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Bibliographic Details
Published in:Dyna (Medellín, Colombia) Colombia), 2021-12, Vol.88 (219), p.123-130
Main Authors: Galvis, Luis Carlos, Ruge Cárdenas, Juan Carlos, Galvis-Salamanca, Luis Carlos, Pulgarín Morales, Laura, Bastidas, Juan Gabriel, Olarte Garzón, María Camila
Format: Article
Language:English
Subjects:
conductividad hidráulica
Dam stability
Embankment stability
hydraulic conductivity
Hydraulic structures
permeabilidad
Permeability
Permeability coefficient
Porous media
Saturated soils
Soil permeability
Soil porosity
succión
suction
suelos parcialmente saturados
unsaturated soils
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Summary:Understanding the flow through porous media when it is part of geotechnical-hydraulic structures has been a scenario calculated from the most unfavorable situation. The passage of water through the porous skeleton of the soil is considered in a saturated condition. Few studies to date consider partially saturated trajectories regarding the influence on the stability of a dam, reservoir, embankment, among others. Estimating the speed with which the fluid under analysis flows through a partially saturated media is challenging to perform by conventional methods. By contrast, nowadays, it is easy to obtain for saturated soil. This study aimed to measure hydraulic conductivity (coefficient of permeability) in granular soils using easily accessible laboratory techniques. The permeability in unsaturated conditions will be measured, varying the suction in the sample, which is an essential requirement when there is a situation of partial saturation. The results provided data on the permeability values that allow to obtain a very evident difference between both proposed conditions.
ISSN:0012-7353
2346-2183
DOI:10.15446/dyna.v88n219.95162