中文摘要：

电解减饱和法是近年来提出的一种处理可液化地基的新方法，通过电解饱和砂土地基中的孔隙水生成气体，达到减小砂土地基饱和度并提高抗液化强度的目的。采用可导电的塑料排水板（EKG）为电极，开展饱和砂土地基在恒定电流下的电解减饱和模型试验，并分析了砂土地基在电解过程中的电学特性。试验结果表明，电解初期饱和度的下降速率与电流强度呈正比；然后饱和度的下降速率变缓；最后饱和度减小到89.5%不再变化，且最终饱和度的大小与电流强度无关。此外，地基的等效电阻随着砂土饱和度的减小而增大，并且对比了孔隙水压力系数B、含气水体积模量Kwa、压缩波速vp和地基等效电阻等4种评价指标在分析饱和砂土减饱和试验中的适用性，结果表明等效电阻在电解减饱和法中最易测得，且对砂土饱和度的敏感范围更大以及适用于各类试验，因此可将地基等效电阻作为评价砂土减饱和状态的有效指标。

英文摘要：

Theelectrolytic desaturation method is an innovative method for mitigation of soil liquefaction inrecent years. In this method, the air bubbles produced by electrolysis in the pore waterof the saturated sandy foundation can reduce the saturation degree of the soil, and improve liquefaction resistance.In this study,the desaturation model tests on sand foundation under constant current intensityare carried outby using theconductive plastic drainage plates as the electrodes. Besides, the electrical properties of the sand foundation in the process of electrolysisare analyzed.The results show that at the initial stage of electrolytic desaturation process, the decreasing rate of saturation increases linearly with the currency intensity, thenthe saturation continues to decrease in a gradual decreaserate, and finally the saturation reduces to 89.5%, which is independentof the current intensity. In addition,the equivalent electrical resistance of the foundation increases with the decrease ofthe saturation of sand. Meanwhile, four kinds of indices including the pore water pressure coefficientB, the gas bearing water bulk modulusKwa, the compression wave velocityvp and equivalent electric resistanceof foundation arealsoevaluated here for analyzing the state of desaturation of sand foundation.The results show that the equivalent electric resistance is most easily measured, and hasthelargest sensitive range of sand saturation. Therefore,theequivalent electric resistanceof foundationcan be adopted as an effective index to evaluate the state of desaturation of sand foundation.