电渗技术中水头压力与电压相互关系试验研究  

Experimental study on relationship between hydraulic headpressure and voltage in electro-osmotic technology

作　　者：司湘 王档良[1] 刘锞锐 杨道坤 焦健睿 SI Xiang;WANG Dang-liang;LIU Ke-rui;YANG Dao-kun;JIAO Jian-rui(School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《煤炭科技》2024年第2期45-49,共5页Coal Science & Technology Magazine

基　　金：大学生创新创业项目(国家级)(202210290040Z)。

摘　　要：电渗透防水技术是一种新型的防水技术,具有维修成本低、应用范围广等特点。利用电渗法,通过室内试验测定了不同电压、电势梯度下4种不同土样的排水速率、电极电势降、有效电势及其利用率,分析了水头压力与电压对电渗的影响。研究结果表明:电压越大,电极电势降越大,有效电势、有效电势利用率减小,有效电势利用率衰减越快;在同一水力梯度下,随着水力渗透系数增大,电渗排水速率也在逐渐增大;且当电势梯度与水力梯度的比值接近k值(水力渗透系数与电渗透系数的比值)时,电渗防水成功。研究可为电渗法的工程应用提供指导。Electro-osmotic waterproofing technology is a new type of waterproofing technology,which has the characteristics of low maintenance cost and wide application range.This article used the electro-osmosis method to experimentally determine the drainage rate,electrode potential drop,effective potential,and its utilization rate of four different soil samples under different voltages and electric potential gradients indoors.The influence of hydraulic head pressure and voltage on electro-osmosis was analyzed.The research results indicate that the higher the voltage,the greater the electrode potential drop,the lower the effective potential and utilization rate,and the faster the attenuation of effective potential utilization rate;under the same hydraulic gradient,as the hydraulic permeability coefficient increases,the electro osmotic drainage rate also gradually increases.Moreover,when the ratio of electric potential gradient to hydraulic gradient approaches the value of k(the ratio of hydraulic permeability coefficient to electro-osmosis coefficient),the electro-osmotic waterproofing is successful.This study can provide guidance for the engineering application of electro-osmosis technology.

关 键 词：电渗技术 水头压力 电压 电势梯度 排水速率 

分 类 号：P641[天文地球—地质矿产勘探]