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为改善软土地基的固结排水效果,对联合使用电渗固结与预压排水技术进行了电渗试验。对于不同粘土试样,同时施加恒定的75kPa外荷载和0～20V外电场,研究在耦合作用时的渗透出流变化。试验结果表明:与仅有外荷载作用相比,在耦合作用下表现为阳极渗透出流量减小、阴极渗透出流量增大、总渗透出流量增大;阳极渗透出流量的变化与电压大小无直接关系;耦合作用能提高饱和粘土的排水速率,特别是在外加电压较高时,电渗固结效果较为明显。
In order to improve the consolidation drainage effect of soft soil foundation, the electroosmosis test was carried out on the combined use of electro-osmosis consolidation and preloading drainage technology. For different clay samples, a constant external load of 75 kPa and an external electric field of 0 to 20 V were applied at the same time to study the change of seepage efflux during the coupling. The experimental results show that, compared with the effect of external load only, the anodic effluent flow rate decreases, the cathodic permeate flow rate increases and the total permeate flow rate increases under the action of external load. The change of anode permeate flow rate and the voltage magnitude Direct relationship; the coupling effect can improve the drainage rate of saturated clay, especially when the applied voltage is higher, the electro-osmosis consolidation effect is more obvious.