Study On Red Clay Slope Stability Under The Condition Of Rainfall Infiltration

In view of the softening characteristics of red clay, the process of precipitationinfiltration and unsaturated seepage simulation are studied to analyze the mechanism how theprecipitation infiltration influences the stability of red clay slope in this paper. Use the keyfactor of the rainfall infiltration as the reduction factor in double strength reduction factormethod, and propose that using the disturbance coefficient of the slope stability to evaluatethe slope stability under the condition of specific environment. The function how the shearstrength of red clay changes with the variation of water content is researched, and the doublefolding strength reduction coefficient method algorithm procedures is written with fishlanguage, with these work, the stress distribution and the influence of shear strength of redclay slope precipitation process is simulated with FLAC3D. View the influence of rainfall asthe key factor which makes the slope to fail, and the safety factor of slope stability undercertain conditions is evaluated with the relative magnitude of interference effect.High and steep mining, road slope generated by human economic activity are mostly atthe active stage. Various environmental disturbance factors influencing the slope stabilityhave different mechanism and effect on slope, however, the effect can be accumulated. Theslope will appear instability with the accumulation of slop body injury. Slope stability directlyaffects people’s lives and property safety, so it is an important problem we are facing how toevaluate the state of slope stability nowadays.There are many influencing factors, so it isn’t reasonable to use one safety factor toevaluate the slope stability. Traditional stability coefficient, which is defined by the ratio ofthe stabilizing force and declining force, is based on mechanical equilibrium, reflecting thethinking of slope safety margin under undisturbed condition. However, the stabilitycoefficient obtained in this manner does not reflect the internal mechanism of slope failure,and can’t reflect the specific impact of external disturbance on slope stability. With thedevelopment of computer, computer technology has resolved the calculation problem for us; italso provides us with a possible method to simulate slope failure reasonably.For a certain slope, the main controlling factor in a certain period is clear andcontrollable. For example, the main controlling factor is dynamic load, rainfall, slopeexcavation and earthquakes function in the production process of Dong Loutian open pit slope.In the view of probability, the possibility of their occurring at the same time is very small,there is only one or a few occurring simultaneously during a specific period. So we can study the failure mechanism of different influencing factors on the slope separately, then obtainslope stability factor under certain conditions.Precipitation is one of the main factors inducing slope instability. Owing to its uniquedry shrinkage and softening Resistance performance, the red clay slope tends to instabilityunder the condition of precipitation infiltration. This article treating red clay slope of Eastopen mining slope as background studies safety evaluation factors mainly consideringinfiltration depth and moisture content. Through analyzing the relationship betweenprecipitation and precipitation infiltration, treat the amount of precipitation as the macrocontrol, which can guide mine safety production.