Unsaturated hydro-mechanical-electro-chemical coupling based on mixture-coupling theory: a unified model

Ge, Shangqi; Ma, Yue; Wang, Kai; Zheng, Lingwei; Xie, Xianjun; Chen, Xiaohui; Yu, Hai‐Sui

doi:10.1016/j.ijengsci.2023.103914

Cited by 5 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The function model f (X) can be decomposed into a sum of 2 p increasing terms to obtain the Equation (11). (11) where f (0) is a constant; X = [x 1 , x 2 ,. .…”

Section: Global Sensitivity Analysis Methodsmentioning

confidence: 99%

“…The drainage consolidation method is economical and efficient, making it a prevalent choice for large-scale marine reclamation [5][6][7][8]. Techniques such as surcharge preloading, vacuum preloading, and electroosmosis are often employed for drainage [9][10][11]. The surcharge preloading applies an external load to the soil surface to promote water expulsion.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Factors Affecting Vacuum Formation and Drainage in the Siphon-Vacuum Drainage Method for Marine Reclamation

Shu,

Wang,

Chen

et al. 2024

JMSE

View full text Add to dashboard Cite

Traditional drainage methods for marine reclamation typically consume large amounts of energy and have a negative environmental impact. The siphon-vacuum drainage method (SVD) automatically forms a vacuum and drains using less energy. It has significant potential for research and application. In this study, a theoretical model is used to calculate the vacuum formation process and drainage rate. Qualitative analysis and global sensitivity analysis were conducted to investigate the effect of various factors in the SVD on vacuum formation and drainage. The qualitative analysis suggests that modifying the length and diameter of the siphon pipe and the thickness of the sealing soil column to increase the siphon rate can improve the vacuum degree and drainage efficiency. Sobol global sensitivity analysis reveals that the sealing soil column thickness is the main factor affecting the vacuum, with a first-order sensitivity index accounting for up to 79.48%. The impact of cylinder diameter and the local resistance coefficient (0.43%) can be almost neglected. A fitting equation for estimating the maximum achievable vacuum is provided. Calculations show that the vacuum formed by the SVD can reach over 80 kPa. This work can help optimize SVD design and advance environmentally friendly marine reclamation projects.

show abstract

“…The function model f (X) can be decomposed into a sum of 2 p increasing terms to obtain the Equation (11). (11) where f (0) is a constant; X = [x 1 , x 2 ,. .…”

Section: Global Sensitivity Analysis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Factors Affecting Vacuum Formation and Drainage in the Siphon-Vacuum Drainage Method for Marine Reclamation

Shu,

Wang,

Chen

et al. 2024

JMSE

View full text Add to dashboard Cite

show abstract

“…Heavy metal ions (HMIs) are a major source of soil contamination and pose considerable challenges to soil remediation. Electrokinetic remediation (EKR) has emerged as a viable method for the rapid and effective treatment of low-permeability contaminated soil and has garnered significant attention in recent years [1]. This technique involves applying a direct current across contaminated soil, inducing the HMIs to migrate towards the cathode for discharge.…”

Section: Introductionmentioning

confidence: 99%

Analytical model for electrokinetic remediation of contaminated soil

Ge,

Wang,

Zheng

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Electrokinetic remediation (EKR) is an effective approach to eliminate heavy metal contaminants from soil and pore water. However, only a few studies have been conducted on related analytical theory because of the complexity of transport processes and the lack of effective calculation methods. In this study, a novel analytical model is proposed to investigate the one-dimensional transport of heavy metal ions (HMIs), encompassing electro-osmosis, electro-migration, hydraulic osmosis, diffusion, adsorption, and thermal diffusion. A comprehensive analysis is conducted to study the effects of key parameters on the transport process. Several important insights are gained, e.g., an increase in the Soret coefficient accelerates the migration of HMIs. Meanwhile, an increase in both the electric potential gradient and the hydraulic gradient is beneficial for the remediation of contaminated soil, although the effect of the electric potential gradient is more significant.

show abstract

Coupled model for electro‐osmosis consolidation and ion transport considering chemical osmosis in saturated clay soils

Ge,

Jiang,

Wang

et al. 2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

The electro‐osmosis approach efficiently facilitates the rapid dewatering of soil with high water content and contributes to reducing contaminant levels within the clay soil. However, the changes of chemical field caused by ion transport in the clay soil during electro‐osmosis process will also influence the clay soil consolidation effect. Existing theories predominantly tend to disregard this crucial physical process and its resultant effects, thereby restraining a comprehensive analysis of electro‐osmosis consolidation (EOC) behavior under intricate chemical conditions. This study introduces a concise model of EOC and ion transport considering chemical osmosis. The model considers the nonlinear variation of clay soil parameters such as compressibility, permeability, and effective diffusion coefficients, along with the interaction between EOC and ion transport. Meanwhile, the correctness of the model is verified from different aspects such as theoretical derivation and model comparison. Based on the proposed model, the impacts of the variation in electrical field intensity and chemical concentration on the coupled behaviors between EOC and ion transport are systematically investigated, with and without incorporating nonlinear consolidation characteristics. The results show that diffusion and electro‐migration exhibit a more pronounced effect on ion transport during EOC. Simultaneously, with the increase of ion concentration in clay soil pore solution, the effects of chemical osmosis become increasingly apparent, thereby enhancing clay soil settlement.

show abstract

Unsaturated hydro-mechanical-electro-chemical coupling based on mixture-coupling theory: a unified model

Cited by 5 publications

References 46 publications

Analysis of Factors Affecting Vacuum Formation and Drainage in the Siphon-Vacuum Drainage Method for Marine Reclamation

Analysis of Factors Affecting Vacuum Formation and Drainage in the Siphon-Vacuum Drainage Method for Marine Reclamation

Analytical model for electrokinetic remediation of contaminated soil

Coupled model for electro‐osmosis consolidation and ion transport considering chemical osmosis in saturated clay soils

Contact Info

Product

Resources

About