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.

中文翻译：

---

考虑饱和粘土中化学渗透的电渗透固结和离子传输耦合模型


电渗透方法有效地促进了高含水量土壤的快速脱水，并有助于降低粘土中的污染物水平。然而，电渗透过程中粘土中离子传输引起的化学场变化也会影响粘土的固结效果。现有理论主要倾向于忽视这一关键的物理过程及其产生的影响，从而限制了对复杂化学条件下电渗固结（EOC）行为的全面分析。本研究介绍了考虑化学渗透的 EOC 和离子传输的简明模型。该模型考虑了粘土参数的非线性变化，例如压缩性、渗透性和有效扩散系数，以及 EOC 和离子传输之间的相互作用。同时，从理论推导、模型比较等不同方面验证了模型的正确性。基于所提出的模型，系统地研究了电场强度和化学浓度的变化对 EOC 和离子输运之间耦合行为的影响，无论是否考虑非线性固结特性。结果表明，扩散和电迁移对 EOC 期间的离子传输表现出更明显的影响。同时，随着粘性土孔隙溶液中离子浓度的增加，化学渗透的作用越来越明显，从而增强粘性土的沉降。