电渗复合真空预压法加固湖相吹填土试验研究

针对湖相吹填土高含水率、高压缩性、低渗透性等特点,采用电渗复合真空预压法进行室内模型试验,并对湖相吹填土的加固效果及试验所用导电塑料排水板的可行性进行研究。试验结果表明:前期抽真空排出部分自由水后停泵,电渗过程中应采用间歇通电、电极转换技术,在间歇通电过程中抽真空排出电渗产生的汇聚在阴极的水,将电渗与真空预压交替进行可实现对吹填土的深层处理并节省能量;导电塑料排水板代替传统金属电极具有明显的优势,可集电渗、排水及真空度传递通道为一体。

Experimental Research on Lacustrine Dredger Fill Treatment under Electro-osmosis in Combination with Vacuum Preloading

Lacustrine dredger fill has high water content, high compressibility and low permeability characteristics etc. In laboratory model test, electro-osmosis in combination with vacuum preloading method is used to treat this kind of soil. The strengthening effect and the feasibility of the electric vertical drains are discussed. The results indicate that discharge part free pore water by vacuum in earlier stage and then turns the pump off beginning to electro-osmosis. In the process of electro-osmosis should use intermittent electricity and electrodes conversion technology. During intermittent electricity process turns the pump on pump out the water generated by electro-osmosis beside the cathode. Throughout the entire process, vacuum preloading and electro-osmosis are taken alternatively to achieve deep soil treatment and save energy. Electric vertical drains can be used as electrodes, drainage paths and distribution of vacuum pressure which have significant advantages over traditional metal electrodes.