阳极跟进作用下软黏土电渗固结室内试验研究

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。

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

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.