Model Test And Numerical Simulation Study Of Slope Instability Induced By Rainfall

Stability of slope During rainfall is an important research topic in geotechnicalengineering over all the world. the losses of human life and property caused by slopeinstablity during rainfall is so heavy, Therefore, the research about that how therainfall causes slope instablity is necessary. Based on the mechanism, slope instablitycan be predicted and even prevented. In this paper, The geo-slope was used forsimulating the process of slope instability. The mechanism of slope instability wasexplained through comparing the result of numerical simulations with experimentalresult. T there are three factors, soil types,intensity of rainfall and the different angleof slope, which affect the stability of slope are studied based on model test andnumerical simulation. the infiltration depth, infiltrating line and pore water pressurewere prepared under the soil types,intensity of rainfall and the different angle of slopethrough model test and numerical simulation. According to the characteristics of sandused in the construction site, combination of analysis of SEEP/W and SLOPE/W aredone to comparison of rainfall duration,soil types, slope and rainfall intensity in theangle of rainfall during the course of the effects of slope stability safety factor. Theresults show that: although the accuracy of the test is affected by many factors, buttest conclusions and results of software simulation are more or less, including thechange of the infiltrating line, the depth of the rainfall infiltration. The pore waterpressure increased with the change of time in the process of rainfall. The results showthat under the sandy soil, the same rainfall time, the faster the safety factor decline,the greater change in soil pore water pressure, the greater change of displacement ofsoil, the same slope of the thickness, the same rainfall time, the greater rainfallintensity, the faster the safety factor decline, the greater change in soil pore waterpressure, the greater change of displacement of soil, under the same rainfall intensity,the same rainfall time, the smaller angle of slope, the latter and faster the safety factordeclines,the greater change in soil pore water pressure, Finally,the displacement ofsoil will enhance, the stability of slope will decrease.