Utilizing actual rainfall data

transient stability of soil slope is computed and analyzed under condition of one peak of rainfall and 8 different kinds of two peak rainfall schemes at different time intervals according to theory of unsaturated soil mechanics. Moreover

the effect of time and space about stability of slope is explored under the infiltration of rainfall into the slope body. In addition

soil hydraulic property changed by rainfall is presented too. It is found that the time effected once by rainfall is about 12 day

the minimum of safety factor appears after 0.5 day of rainfall

that the most dangerous situations of the soil slope effected by different interval time of twice rainfall happen 0.3-0.8 day later than that of once rainfall

the lasting time effected by rainfall being kept

and that the physical and mechanics characteristics of the soil

the most dangerous slip surface of the slope and its relative safety factor is effected and vibrated with water motion in different parts of the slope.