Influence Of Rainfall And Elevation Of Water Level On Slope Stability

Slope engineering is always a focus and hot issue in the engineering World.Therefore,studying and solving slope stability problems is also the responsibility and task of all researchers in the geotechnical community.Slope engineering is affected by a variety of factors,such as the influence of rainfall conditions,the effect of water level changes,and the combination of various conditions.In this article,the effects of rainfall conditions on various parameters of slopes and their variation laws were simulated by Geo-studio,and the impact of reservoir water level on slopes was analyzed based on the project case.This article also studied the soil parameters of red soil in Jiangxi by using basic soil tests.And using red clay to simulate the model test of the effect of water level change on the slope.In addition,two kinds of sensitivity analysis methods are used to analyze the influence of various factors on the slope stability.The main research content is as follows:(1)Establish a homogeneous soil slope model and use Geo-studio finite element software to do seepage analysis and slope stability analysis under rainfall conditions.Three calculation conditions were established to compare and analyze the effects of different rainfall intensity and different rainfall durations on the dynamic changes of volumetric water content and pore water pressure in the slope during soil infiltration,and analyzed the rainfall process in conjunction with the limit equilibrium method.Slope stability changes.(2)Combining with engineering cases,analyze the three processes of water level change in a reservoir,namely,the dynamic change process of pore water pressure during the rising stage of water level,the impoundment period and the stage of reservoir water level decline,the characteristics of XY seepage velocity change,and the change of reservoir slope stability coefficient.(3)Using Jiangxi red soil as material,carry out the corresponding soil basic experiment,obtain the basic soil parameters of the required red soil,using the physical model to simulate the influence of the water level change on the slope,and monitor and analyze the changes of the soil slope parameters in different stages,compare the simulation made by software with experiment and to illustrate the reliability of the test.(4)Using method of single factor analysis and multi-factor orthogonal analysis,the single factor sensitivity analysis and multi-factor orthogonal analysis were used to analyze the factors which affect the slope stability.