【摘要】 电动化学加固技术是一种有效的集排水与土体胶结于一体的新型软基处理技术，以往电动化学加固对软土改性的机制研究相对较少，从土体的十字板剪切强度、pH、总有机碳（total organic carbon，简称TOC）、X射线荧光光谱（X-ray fluorescence，简称XRF）、X射线衍射（X-ray diffraction，简称XRD）以及扫描电镜（scanning electron microscopy，简称SEM）等表征介入，详细探讨了电动化学加固前后土体的物理力学、化学特征及微观形态变化，结果表明：电动化学加固过程中，土体环境发生了剧烈变化，促进了诸如电解、离子吸附与解吸、阳离子交换等反应，促进了土体内大量有机质的排出，并生成了硅酸钙、铝酸钙、钙矾石等物质，使加固区的土体结构由松散状变为更致密的片状结构，并且土颗粒中的团粒结构增加，整体上使得土体强度迅速显著提高。更多还原

【Abstract】 Electro-chemical stabilization(ECS) is an innovative soft soil treatment technology that effectively combines drainage and soil cementation. Previous studies on the modification mechanisms of soft soils via ECS remain scarce. This study systematically investigates changes in the physico-mechanical properties, chemical characteristics, and microstructural morphology of soil pre-and post-ECS through vane shear strength tests, pH measurements, total organic carbon(TOC) analysis, X-ray fluorescence(XRF), X-ray diffraction(XRD), and scanning electron microscopy(SEM). The results demonstrate that ECS induces drastic alterations in the soil environment, triggering electrolysis, ion adsorption/desorption, and cation exchange reactions. These processes(1) facilitate the expulsion of abundant organic matter, and(2) generate cementitious compounds(e.g., calcium silicate, calcium aluminate, ettringite). Consequently, the soil structure evolves from a dispersed state to a denser sheet-like configuration, with increased aggregation of soil particles. Collectively, these transformations contribute to a rapid and marked improvement in soil strength.更多还原