| With the step of the large-scale economic development of our country, most of the infrastructure construction item in our country has been finished or will soon be finished, these extra-huge construction item changed the lag situation in our country, helped the national economy and the social development ,at the same time given the negative effect to the ecological environment. According to the survey, the land about 632 km2 would be submerged after the Three Gorges dam been built up. There are 172 non-stable reservoir bank along with the reservoir bankline which about 5927km, add up to 385 km, the elevation lower than 175m in front of the sub-slides has 1627, the volume accumulates about 3,890,000,000 m3, has a probation of 10% of the total reservoir volume, for the most part is soil landslide in there slump-mass. With the reservoir water which has a variability of 30m rise and drop periodically the revival of the ancient landslide would be accelerated. Maybe a new landslide would be produced, threaten the security of this region directly.Thesis take one hydrous slope for example, carried a study about stable analysis of the hydrous slope deeply. The main achievement and innovation have:(1) Thesis take one-dimensional vertical infiltration of not-saturated soil as basic theory, studied the Green-Ampt and the Philip model. Some characteristic parameters of these two models have relationship. So thesis put forward new models to improve. The infiltration model after improved not only reserved the advantage of original models, but also overcome the disadvantage, become easier to apply for engineering.(2) Thesis put forward some new parameter to carry out the seepage problem, made use of these improved models to compute the saturated infiltration of landslide in the extreme-rainfall condition. Compute result shows that: At the condition of unchanged rainfall, the infiltrating depth by short-time rain smaller than long-time's. The infiltrating depth controlled by rainfall and moisture content mainly when rainfall smaller than saturated infiltration.(3) Thesis take Dupuit suppose as basic theory, convert Boussinesq equation into line one by added average thickness of moisture content , the approximate solution of groundwater saturation line was obtained when the water table rise and drop along the random water-resisting floor and slide. Put forward new parabolic liquid wetting property and compute method. It proved the limitations of traditional methods theoretically.(4) Thesis use ABAQUS software to imitate dynamic change of groundwater seepage field in the effect of rainfall and water table. The change regulation of groundwater saturation line with different rainfall, gradient and water table was obtained.(5) Thesis carried in stable analysis of hydrous slope by use of modulus method. Put forward new slice method and compute order. Engineering calculates shows that the method is clear and simple, overcome the disadvantage of empirical method, easier to apply for engineering.(6) Treatment technique of someone waded soil landslide project in this paper succeeded in preventing the continued development of the landslide hazard by use of surface cut-drainage, anti-skid anti-slide pile of reinforced concrete, gravity-type retaining wall bracing and baffle-revetment of inter-pile reinforced concrete. Monitoring data shows that the landslide control project in Treatment measures are reasonable and effective governance to achieve the desired results on two years.
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