Modelling combined electroosmosis–vacuum–surcharge preloading consolidation considering large-scale deformation

Zhou, Yadong; Deng, An

doi:10.1016/j.compgeo.2019.01.013

Cited by 19 publications

(3 citation statements)

References 25 publications

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“…Research studies have been conducted on the effectiveness of EO in consolidating soft soils, providing a sound understanding of consolidation mechanism for engineering applications (Lo et al, 1991;Micic et al, 2001;Citeau et al, 2011;Zhang et al, 2017;. These studies have explored various facets, including electroosmotic theory (Hu et al, 2010;Wang et al, 2019), pH influences (Hu et al, 2019), chemical grouting (Ou et al, 2015;Zhang et al, 2017;Xue et al, 2018;Du et al, 2022), combined applications with other methods (Deng and Zhou, 2016;Wang et al, 2016;Zhou and Deng, 2019;, and both theoretical and numerical simulations (Matteo et al, 2017;Zhang and Hu, 2022;Zhou et al, 2022). In recent years, research has focused on emerging areas, including the bio-inspired heavy metal immobilization method and the enzyme-induced carbonate precipitation method.…”

Section: Introductionmentioning

confidence: 99%

Effects of electrode materials and potential gradient on electro-osmotic consolidation for marine clayey soils

Jin,

Zhang,

Wang

et al. 2024

Front. Earth Sci.

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This study conducted experimental investigations into the effects of electrode material and potential gradient on the effectiveness of electro-osmotic consolidation (EO) in strengthening soft soils. Seven laboratory tests were conducted on high-water-content marine clayey soils through EO. In these experimental tests, four different types of electrodes made of steel, copper, aluminum, and composite carbon fiber (CCF) were employed in four tests each to evaluate the consolidation effectiveness. Additionally, four tests, one was the comparitive study for different eletrode materials, were carried out to determine the optimal gradient for the EO using CCF electrode. Several critical properties of the tested soils were examined and evaluated in this study, including the effective voltage utilization, potential distribution, water discharge, discharge rate, energy consumption, and soil bearing capacity. The test results indicated that the CCF electrode had superior performance in water discharge, discharge rate, and average soil water content compared to metal electrodes. Furthermore, CCF led to uniform enhancement of soil strength, with treated soil bearing capacities 6.3 to 12 times higher than initial values, and 1.9 to 2.5 times higher than those attained with metal electrodes. Additionally, an effective potential gradient of 1 V/cm was identified for the EO with the CCF electrode, providing a higher discharge rate and a larger soil strength in a uniform distribution. Moreover, the use of CCF electrode significantly reduced corrosion compared to metal electrodes during the consolidation process, further contributing to improved consolidation efficiency. This study offers valuable insights and recommendations for the utilization of CCF in marine clayey soils, effectively addressing the challenges posed by electrode corrosion and high energy consumption in EO applications.

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Section: Introductionmentioning

confidence: 99%

Effects of electrode materials and potential gradient on electro-osmotic consolidation for marine clayey soils

Jin,

Zhang,

Wang

et al. 2024

Front. Earth Sci.

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“…The schematic diagram for axisymmetric electro‐osmotic consolidation (after Zhou and Deng 40 ; Hu and Wu 26 ): (A) profile view; (B) plan view.…”

Section: Introductionmentioning

confidence: 99%

A general analytical solution for axisymmetric electro‐osmotic consolidation of unsaturated soil with semi‐permeable boundary

Zhao,

Ni,

Liu

et al. 2024

Num Anal Meth Geomechanics

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This study proposes a closed‐form solution for axisymmetric electro‐osmotic consolidation of unsaturated soil under semi‐permeable boundary conditions. The governing equations are formulated to allow for vertical and radial flows of liquid and air phases. The techniques of eigenfunction expansion and Laplace transformation are employed to develop the exact solution for excess pore‐air (EPAP) and pore‐water pressures (EPWP). The proposed solution is first validated by comparing it to an existing solution, followed by verification through finite element simulations. Both methods of validation confirm the accuracy of the analytical solution. Then, based on the obtained solution, the effects of vertical flow, semi‐permeable boundary conditions, electrical voltage, electro‐osmosis conductivity and spacing ratio re/rw on the consolidation profile have been further investigated. Parametric studies show that the EPWP at the steady state depends on the electro‐osmosis conductivity and applied electricity gradient. In addition, the dissipation rates of EPWP and EPAP in the axisymmetric electro‐osmotic consolidation would be underestimated if the vertical flows are neglected. The semi‐permeable boundary conditions have great influences on the dissipation rate and the steady‐state solution. The proposed solution could serve as a theoretical basis for axisymmetric electro‐osmotic consolidation of unsaturated soil.

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“…In this direction, many researches 14–16 on EOF of viscous fluid (Newtonian model) driven by peristaltic pumping have been investigated for three‐layered blood flow, 14 capillary flow, 15 and channel flow 16 . Uses, studies, and discussions on the direction of EOF of Newtonian and non‐Newtonian fluid have been addressed in References [17–20].…”

Section: Introductionmentioning

confidence: 99%

The effect of computational processing of temperature‐ and concentration‐dependent parameters on non‐Newtonian fluid MHD: Applications of numerical methods

Ibrahim

Asfour

2022

Heat Trans

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This investigation aims to introduce a new solution with aid of numerical methods to the blood flow of Carreau-Yasuda fluid through a microvessel. Swimming of gyrotactic microorganisms with nanoparticles is considered. A resulting system of partial differential equations is simplified by the meaning of low Reynolds number and long wavelength. This system of partial differential equations was formulated and transformed mathematically using new theories of differential transform method. Variable nonndimensional physical parameters effects, such as numbers of bioconvection Peclet and bioconvection Rayleigh, and so forth on velocity, temperature, and concentration distribution as well as oxytactic microorganism and oxygen concentration profiles are studied. All results are constructed in two cases of viscosity on the same figure, one of them in the case of variable parameters and the other in constant parameters. The existing study assured that the microorganism density in the direction near to the hypoxic tumor tissues regions grows with a rise in oxygen concentrations and the blood viscosity diminutions.

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Modelling combined electroosmosis–vacuum–surcharge preloading consolidation considering large-scale deformation

Cited by 19 publications

References 25 publications

Effects of electrode materials and potential gradient on electro-osmotic consolidation for marine clayey soils

Effects of electrode materials and potential gradient on electro-osmotic consolidation for marine clayey soils

A general analytical solution for axisymmetric electro‐osmotic consolidation of unsaturated soil with semi‐permeable boundary

The effect of computational processing of temperature‐ and concentration‐dependent parameters on non‐Newtonian fluid MHD: Applications of numerical methods

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