Numerical analysis of electro-osmosis consolidation: a case study

Yuan, Jiani; Hicks, Michael

doi:10.1680/jgele.15.00045

Cited by 14 publications

(3 citation statements)

References 23 publications

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“…Additionally, field tests have been performed to determine the required parameters its potential application to other field applications [16][17][18][19][20][21]. Electroosmotic dehydration phenomenon in soils have also been investigated through analytical models [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical perspective on the applicability of electroosmosis for clay consolidation

Sugiyama,

Hashimoto,

Couture

et al. 2023

J Appl Electrochem

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There are three main electrochemical factors affecting the electroosmotic flow in clay soil: the voltage loss at the clay/electrode interface, the type of current carriers in the soil, and the ion composition change in the clay due to voltage application. Appropriate evaluation of these factors is important to cost effectively implement electroosmosis for in situ soil consolidation projects. In this study, three different experimental systems were developed and used to investigate electrochemical reactions occurring in reconstituted and natural marine clay during electroosmotic consolidation. The results of polarization tests show that the voltage loss at the clay/electrode interface is different depending on the combination of the clay material and electrode material. The results of electroosmotic element test also show that electroosmotic dehydration does not increase if large current–voltage value is applied and that an optimal current–voltage value for causing electroosmosis depends on the cohesive soil composition. If the clay contains a lot of oxidizable ions, such as sodium, these ions affect electrophoresis and chemical reactions that occur in the soil. Therefore, the optimal configuration to apply electric current also differs depending on the clay. The results of laboratory-scale electroosmotic dehydration tests, arranged in a realistic in situ layout, are performed to study the relationship between soil dehydration, consolidation, and surface crack generation. Graphical abstract

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Section: Introductionmentioning

confidence: 99%

Electrochemical perspective on the applicability of electroosmosis for clay consolidation

Sugiyama,

Hashimoto,

Couture

et al. 2023

J Appl Electrochem

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show abstract

“…e above studies provide a good reference for calculating electroosmotic current and energy consumption, but they did not consider the influence of sand layer in ground. To simulate electroosmosis consolidation with a numerical method, Yuan and Hicks [15,16] proposed a numerical model for the numerical analysis of electroosmosis consolidation and verified it with a case study. Chang and Sheen [17] used the excess pore water pressure of the three-dimensional consolidation behavior to deduce the three-dimensional electroosmotic equation under solar energy electroosmosis.…”

Section: Introductionmentioning

confidence: 99%

Design Method and Verification of Electroosmosis‐Vacuum Preloading Method for Sand‐Interlayered Soft Foundation

Cui

Wang

et al. 2020

Advances in Civil Engineering

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The design method of electroosmosis-vacuum preloading for soft foundation treatment is not systematic and complete, thereby restricting the application of the technology in engineering. A design method for the electroosmosis-vacuum preloading treatment of sand-interlayered soft foundation is therefore presented. A compressible electrical prefabricated vertical drain is developed, and a vacuum sealing and draining system is designed for the application of the electroosmosis-vacuum preloading in sand-interlayered soft foundation. Calculation formulas of site resistance considering the interlayer and interface resistivity of the electrode are established to design the power supply and electrical circuit. A simple numerical simulation method is proposed to predict the ground settlement treated by electroosmosis-vacuum preloading. A field test of electroosmosis-vacuum preloading is designed using the suggested method, and comparison tests between the electroosmosis-vacuum preloading and the vacuum preloading are performed to verify the proposed technique. The test results show that the proposed design method is reasonable for the design of electroosmosis-vacuum preloading in engineering.

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“…Various treatment methods have been proposed for the improvement of these soft foundations, among which electro-osmotic consolidation has proven to be a promising method, especially for soils with low permeability [1][2][3][4][5][6][7][8][9][10]. Unlike the traditional methods such as surcharge and vacuum preloading which dewater soil mass by applying a hydraulic gradient, electro-osmotic consolidation involves pairs of anodes and cathodes installed in the soil mass, through which an electrical field is applied and pore water is driven from the anode to cathode under the electrical gradient.…”

Section: Introductionmentioning

confidence: 99%

Electro-osmotic consolidation of soil with variable compressibility, hydraulic conductivity and electro-osmosis conductivity

et al. 2017

Computers and Geotechnics

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a b s t r a c tIn present study, the non-linear variations of soil compressibility, hydraulic and electro-osmosis conductivities were analyzed through laboratory experiments, and incorporated in a one-dimensional model. The analytical solutions for excess pore water pressure and degree of consolidation were derived, and numerical simulations were performed to verify its effectiveness. The results indicated that both the non-linear variations of hydraulic and electro-osmosis conductivities showed remarkable impacts on the excess pore water pressure and degree of consolidation, especially for soils with relative high compressibility. A further comparison with previous analytical solutions indicated that more accurate predictions could be obtained with the proposed analytical solutions.

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Numerical analysis of electro-osmosis consolidation: a case study

Cited by 14 publications

References 23 publications

Electrochemical perspective on the applicability of electroosmosis for clay consolidation

Electrochemical perspective on the applicability of electroosmosis for clay consolidation

Design Method and Verification of Electroosmosis‐Vacuum Preloading Method for Sand‐Interlayered Soft Foundation

Electro-osmotic consolidation of soil with variable compressibility, hydraulic conductivity and electro-osmosis conductivity

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