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The first modern theoretical models for soil consolidation were proposed in the 1920s by Terzaghi and Fillunger, according to two substantially different approaches. [1] The former was based on diffusion equations in eulerian notation, whereas the latter considered the local Newton’s law for both liquid and solid phases, in which main variables, such as partial pressure, porosity, local ...
Change in soil structure due to aging (secondary compression): Over time, soil will consolidate even after high pressures from loading and pore water pressure have been depleted. [4] [9] Environmental changes: Changes in pH, temperature, and salt concentration can cause a soil to approach its preconsolidation pressure. [4] [9]
Poroelasticity is a field in materials science and mechanics that studies the interaction between fluid flow, pressure and bulk solid deformation within a linear porous medium and it is an extension of elasticity and porous medium flow (diffusion equation). [1] The deformation of the medium influences the flow of the fluid and vice versa.
The coefficient of lateral earth pressure, K, is defined as the ratio of the horizontal effective stress, σ’ h, to the vertical effective stress, σ’ v.The effective stress is the intergranular stress calculated by subtracting the pore water pressure from the total stress as described in soil mechanics.
Matric suction: the defining trait of unsaturated soil, this term corresponds to the pressure dry soil exerts on the surrounding material to equalise the moisture content in the overall block of soil and is defined as the difference between pore air pressure, (), and pore water pressure, (). [2]
Summary of hydrologic and physical properties of rock and soil materials as analyzed by the Hydrologic Laboratory of the U.S. Geological Survey 1948-1960. U.S. Geological Survey Water Supply Paper 1839-D. 42 p. De Wiest, R. J. (1966). On the storage coefficient and the equations of groundwater flow. Journal of Geophysical Research, 71(4), 1117 ...
Water pressure, u, is negative above and positive below the free water surface. If the soil pores are filled with water that is not flowing but is static, the pore water pressures will be hydrostatic. The water table is located at the depth where the water pressure is equal to the atmospheric pressure. For hydrostatic conditions, the water ...
Terzaghi's Principle states that when stress is applied to a porous material, it is opposed by the fluid pressure filling the pores in the material. [1]Karl von Terzaghi introduced the idea in a series of papers in the 1920s based on his examination of building consolidation on soil.