阳极跟进作用下软黏土电渗固结室内试验研究  

Experimental Analysis of the Electro-Osmosis Consolidation of Soft Clay Under Anode Follow-up

作　　者：刘飞禹[1] 张乐[1] 王军[2] 张斌[3] 

机构地区：[1]上海大学土木工程系,上海200072 [2]温州大学建筑与土木工程学院,浙江温州325035 [3]上海市电力公司,上海200122

出　　处：《土木建筑与环境工程》2014年第1期52-58,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(50808119);浙江省科技攻关项目(2010C33182);上海市电力公司科技项目

摘　　要：在等电势梯度的前提下,针对电渗法加固软黏土地基提出了阳极跟进技术,设计了8组电渗对比试验,对不同阳极跟进方案作用下电渗试验的电流、抗剪强度、排水量、含水率、pH值和土体电导率等指标进行了监测,分析了不同方案下的电渗加固效果。试验结果表明:采用阳极跟进技术时,第1次阳极跟进作用效果最为显著;在电流密度处于高位时进行阳极跟进会在一定程度上降低电渗效率,在电流密度处于低位时进行阳极跟进能够促进电渗作用;针对阴极区土体开展阳极跟进无法获得显著的加固效果。研究结果表明,阳极跟进技术能够降低电路中的阳极区电阻,有效提高电渗加固效果。Under the equipotential premise gradient ,anode follow-up technical was proposed in the electro-osmosis reinforcement of soft clay . Eight electro-osmosis contrast tests were conducted through the experimental test .Currently ,shear strength ,displacement ,moisture content ,pH ,conductivity of the soil and other indicators were monitored in the electro-osmosis test .Different electro-osmotic reinforcement effects were analyzed .The results show that ：when the anode follow-up is used ,the first anode follow-up can get a most significant effect .When the current density is high ,arranging the anode follow-up will lead some extent reduce of the effect of the electro-osmosis ,while the effect will be promoted when the current density is low .By carrying out the anode follow-up on the cathode region soil ,a significant reinforcement effect can be obtained .Anode follow-up can reduce the resistance of the circuit in the anode region and effectively promote the electro-osmosis reinforcement effect .

关 键 词：电渗法 阳极跟进 土体电阻 剪切强度 

分 类 号：TU443[建筑科学—岩土工程]