Desaturation method is an innovative method to reduce the liquefaction risk of sandy grounds. The mechanism is to reduce soil saturation by introducing gas into soil pores

thereby increasing liquefaction resistance. This method provides a simple but economical solution to liquefaction of sandy soils. However

the long-term stability of the unsaturated state of the treated sand is a critical issue affecting the anti-liquefaction efficacy and economical efficiency of the desaturation method

and there are few related studies currently. In this study

an originally saturated sandy ground was desaturated by electrolytic desaturation method

and the change in saturation was investigated under different conditions

including hydrostatic and hydraulic gradient flow conditions. Additionally

the effects of hydraulic gradient

particle size distribution

relative density

and initial saturation degree on the saturation change of the specimens were analyzed. The results show that pore-water seepage gradually increases the saturation degree of the specimens until it stabilizes. A larger hydraulic gradient yields a higher final stable saturation degree. Under the same seepage conditions

smaller relative density and finer particle size lead to smaller final changes in saturation. In addition

decreasing the saturation of the specimen after electrolysis reduces the final stable saturation degree.