不同增压方式下电渗法加固滩涂淤泥试验研究

摘要

针对电渗法处理滩涂淤泥能耗高、后期排水效率低的问题,利用自制的试验装置进行4种不同增压方式下电渗试验.通过监测电渗过程中电流、排水量和阴极水pH,以及试验结束后检测土体的含水率和抗剪强度,研究不同的增压方式对电渗法加固滩涂淤泥效果的影响.试验结果表明:不同的增压方式明显影响电渗效果;相对于稳压输入,电源采用逐级增压可以减缓电流的衰减;合适的增压方式不仅可以降低能耗、提高后期排水速率,还可以有效地提高土体抗剪强度和降低含水率.%Aiming at the problem of high energy consumption and low drainage efficiency in the electroosmosis of tideland sludge, the electroosmosis model tests under four different voltage modes were conducted on the tideland sludge using a self-made apparatus. The test monitored the current intensity, the drainage and the pH of cathode water,analyzed the water content and shear strength to investigate the influence of applying stepped voltages on electroosmosis consolidated tideland sludge. The test results showed that different programs of stepped voltage affected the treatment efficiency significantly. In comparison to applying voltage constantly, the technique of stepped voltage reduced current attenuation. The appropriate stepped voltage reduced energy consumption, improved water drainage efficiency at later stage and enhanced the soil shear strength and reduced water content effectively.