Pore Pressures, Consolidation, and Electrokinetics

Esrig, Melvin I.

doi:10.1061/jsfeaq.0001178

Cited by 205 publications

(29 citation statements)

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“…the pore water pressure, accessibility to atmosphere and soil permeability. At the outset, the negative pore water pressure, as per [6], emerges but is small, and its presence is restricted to the locations near the anode. The emerged pore water pressure needs to be balanced in terms of Eqs.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The farther from the entry point of the anode, the less noticeable the pressure reduction, if the pore water pressure keeps increasing. The fact is that the pore water pressures reach equilibrium, whereas the voltage gradient remains unchanged [6]. The continuous inflow of air is able to occupy, progressively downward, the pore space and reduce the pore air pressure, which explains the gradual flat-outs of pore air pressure isochrones.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Along with the progress of electro-osmotic consolidation, the pore water pressure uw decreases nonlinearly over the distance between the cathodes and anodes and, if the anodes are closed, becomes negative progressively from the anodes towards the cathodes [6,12]. Provided that the matric suction, us, is expressed as…”

Section: Stresses and Pore Pressuresmentioning

confidence: 99%

“…Although electro-osmosis is showing great trait in porous media dewatering, challenges remain with respect to accurately predicting rate of flow, soil deformation and resulting energy consumption. Earlier studies [6][7][8][9][10] have developed consolidation models from the largely idealised perspective of full saturation. This assumption helps simplify model development, and is acceptable for soils of relatively high moisture contents [11], or soil layers with an open boundary at anodes [12].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modelling electro-osmosis–surcharge preloading combined consolidation of unsaturated soils

Zhou

Deng

2019

Computers and Geotechnics

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Simulation Resultsmentioning

confidence: 99%

Section: Stresses and Pore Pressuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling electro-osmosis–surcharge preloading combined consolidation of unsaturated soils

Zhou

Deng

2019

Computers and Geotechnics

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“…In 1968, Esrig proposed a one-dimensional electroosmotic consolidation theory under the assumption that the flow caused by the voltage and head differences can be superimposed. is theory is used to explain the phenomena of excess pore water pressure increase and dissipation in the electroosmosis process [15]. In 1976, based on Esrig's onedimensional electroosmotic consolidation theory, Wan proposed a one-dimensional electroosmotic consolidation theory considering external loads.…”

Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Electroosmotic Consolidation Theory of Nonlinear Soil Voltage Distribution Characteristics

Shen

Feng

et al. 2019

Advances in Civil Engineering

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Soil voltage is generally assumed to show a linear relationship with distance from the cathode according to the established electroosmotic consolidation equation. However, this assumption is inconsistent with experimental results. To more reasonably reflect the soil consolidation process during electroosmosis treatment, it is necessary to consider the influence of the actual soil voltage distribution trend when establishing the electroosmotic consolidation equation. Electroosmosis results show that soil voltage exhibits nonlinear distribution characteristics against distance from the cathode. The change trend of soil voltage can be well reflected by cubic polynomial fitting. Then, the anodic electrode was taken as the research object, and a two-dimensional horizontal plane model of electroosmosis was established because it represents practical electroosmosis applications more closely than some other models. Based on this established model, the dissipation equation describing the excess pore water pressure and the soil consolidation equation were derived for the electroosmosis treatment process. The derivation process considered both linear and nonlinear soil voltage distributions, wherein the anode was closed and the cathode was open. Finally, the analytical solution was analyzed and validated with model test cases in terms of the excess pore water pressure and average moisture content of the soil. The trend observed in the measured excess pore water pressure was more consistent with that of the theoretical results calculated assuming a nonlinear soil voltage distribution than that obtained using a linear distribution. In addition, the measured values of the average moisture content in the soil were closer to the values calculated under a nonlinear distribution of soil voltage than to those calculated under a linear distribution. These results further show that the established consolidation equation is reasonable when a nonlinear distribution of soil voltage is considered. The proposed consolidation equation can thus improve the application of electroosmotic methods in the future.

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Development of a new electrokinetic technique for decontamination of hexavalent chromium from low surface charged soils

et al. 1996

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Pore Pressures, Consolidation, and Electrokinetics

Cited by 205 publications

References 0 publications

Modelling electro-osmosis–surcharge preloading combined consolidation of unsaturated soils

Modelling electro-osmosis–surcharge preloading combined consolidation of unsaturated soils

Two‐Dimensional Electroosmotic Consolidation Theory of Nonlinear Soil Voltage Distribution Characteristics

Development of a new electrokinetic technique for decontamination of hexavalent chromium from low surface charged soils

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