Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
For saturated soils the interaction of skeleton and pore water can be captured by the effective stress principle and by means of Darcy’s law. In case of partial saturation it is convenient to work again with a kind of pore fluid, and with partial stresses and a permeability relation. A moist soil is glued by capillary water which can scarcely flow. Terzaghi (1920) observed that water in narrow slits between glass plates is less mobile. He called it bound pore water and proposed later that this glues particles in saturated clay (Terzaghi 1931). Derjaguin and Churaev (1973) postulated a denser and more viscous ‘polywater’ in narrow gaps. The DLVO-theory by Derjaguin, Landau, Verwey and Overbeck explains equilibria with interparticle attraction and repulsion in colloids. The interactions of soil particles are more complicated and beyond the present reach of thermodynamics, molecular dynamics and microscopy. So there is no way around heuristic approaches with pore fluid, partial stresses and transport relations, but caution is required.
For saturated soils the interaction of skeleton and pore water can be captured by the effective stress principle and by means of Darcy’s law. In case of partial saturation it is convenient to work again with a kind of pore fluid, and with partial stresses and a permeability relation. A moist soil is glued by capillary water which can scarcely flow. Terzaghi (1920) observed that water in narrow slits between glass plates is less mobile. He called it bound pore water and proposed later that this glues particles in saturated clay (Terzaghi 1931). Derjaguin and Churaev (1973) postulated a denser and more viscous ‘polywater’ in narrow gaps. The DLVO-theory by Derjaguin, Landau, Verwey and Overbeck explains equilibria with interparticle attraction and repulsion in colloids. The interactions of soil particles are more complicated and beyond the present reach of thermodynamics, molecular dynamics and microscopy. So there is no way around heuristic approaches with pore fluid, partial stresses and transport relations, but caution is required.
Pore fluid
Adv.Geophysical,Environmental Mech.
Gudehus, Gerd (Autor:in)
17.08.2010
20 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Pore Water , Void Ratio , Pore Fluid , Biaxial Test , Pore Fluid Pressure Engineering , Geoengineering, Foundations, Hydraulics , Engineering, general , Geotechnical Engineering & Applied Earth Sciences , Geophysics/Geodesy , Soft and Granular Matter, Complex Fluids and Microfluidics , Earth and Environmental Science
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