基于电化学反应的软土电渗界面电阻试验研究

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中图分类号：TU472.5 文献标志码：A 文章编号：2096-6717（2025）04-0010-09

Experimental study of electro-osmotic interface resistance of soft soil based on electrochemical reaction

HU Hao1，GAN Qiyun2³， ZHOU Jian²，MA Yuchun L1 ， JIANG Yicheng 2 ， ZHU Zeming² （1. China Railway Construction Group Southern Enginering Co.，Ltd.，Guangzhou 5l1466，P.R.China；2.Coastal and Urban Geotechnical Engineering Research Center; Zhejiang Urban Underground Space Development Engineering Research Center， Zhejiang University，Hangzhou 31Oo58，P.R.China；3. Zhejiang Jiantou Innovation Technology Co.，Ltd.，Hangzhou 310012，P.R.China）

Abstract： In order to solve the issue of high energy consumption and significant potential loss at the soilelectrode interface during electroosmotic consolidation，this study investigates the impact of electrode reactions on interface resistance from an electrochemical perspective.By using a self-designed one-dimensional electroosmotic consolidation device，indoor experiments were conducted to explore the trend of the clay-electrode interface resistance under diffrent electrode materials and diffrent power supply modes.The trend of interfacial resistance of four diffrent electrode materials，electric geosynthetics （EKG），iron，aluminum and copper， under continuous power supply was investigated through laboratory electroosmotic tests.Further，the electrochemical mechanism of action of two optimized power supply modes，intermittent current and polarity reversal，were investigated.Results show that electrode reactions alter the interface electrochemical properties， affecting interface resistance and thus the electroosmotic drainage rate.The rapid growth of the interfacial resistance is one of the reasons for the high energy consumption of electro-osmosis The anode interface resistance is significantly afected by electrode reactions，with a smaller anode interface resistance observed in the EKG electrode under long-term electrification，while the metal electrode exhibits a larger anode interface resistance due to the combined efects of concentration polarization and surface membrane resistance.Using an optimized power supply strategy could help alleviate interface polarization and inhibit interface resistance growth.

Keywords： electro-osmotic; interfacial resistance; electrode reaction; experiment study; ground improvement; electrochemistry

电渗法是一种加快细粒土排水固结的有效方法，被应用于软土地基加固、疏浚淤泥排水、重金属污染土修复以及尾矿脱水等领域[。（剩余13830字）