Study On Stability Analysis And Reinforcement Measures Of Highway High Slope Of Soil Embankment

The stability of high slope is always a task that should be paid attention to in engineering.However,the stability of artificially filled embankments is particularly prominent.Because of the multiple factors such as the nature of soil filling,the method of construction,the external load and the environmental impact,the failure mechanism of the high slope of embankment is more complex.For this kind of high embankment slope,slope to the filling process and rainfall infiltration stability are analysed,and the design method of strengthening the reasonable,in order to provide an important reference for the optimization design and construction guidance filling high slope.Based on this,this paper will combine the actual embankment high slope engineering,and based on the grey relational analysis method,discuss the function,process and sensitivity of the failure mode and stability factors of the high slope,based on the numerical method,the stability of embankment high slope during filling and after different rainfall infiltration is analyzed,and through the fuzzy mathematics method,contrast and analyze the reinforcement measures of the high slope of the embankment from different angles,the optimum reinforcement scheme is determined,and the reinforcement effect is evaluated by numerical analysis,which provides better guidance for the design and construction of the slope.The main conclusions are as follows:(1)The sensitivity of soil slope stability of the project shows that the main order of the slope is cohesion,internal friction angle>gravity>slope height>slope>filling layer>single slope height.(2)When filling slope not stress level in the undisturbed slope toe.When the filling height is h<8m,the sliding surface in the undisturbed slope,filling with soil increased,the location of the sliding surface increased,sliding arc length.When the filling height of 8m = H = 10m,transferred to the sliding surface of the filled soil,then prone to a partial sliding slope.When the filling height is less than or equal to 19m 10m<h,with second filling slope of the sliding surface extends to the second level on the slope,easily lead to a level 22,the overall sliding slope.When the filling height is 19m<h,along with the filling of the third grade slope,the sliding surface extends to the third grade slope,which will lead to the sliding of the three grade slope.The numerical simulation results show that the overall stability coefficient is 1.13<1.30.Therefore,the preliminary design scheme of the slope is not enough to ensure the safety,and further reinforcement measures need to be taken.(3)The horizontal displacement of the slope after rainfall will continue to increase,the condition of the maximum horizontal displacement occurs at the foot of the slope position.And with the increase of rainfall time,the rate of horizontal displacement increases faster and faster.The horizontal displacement increases by 4.7 times from 84h to 96h.After 84h,the slope will have high risk of landslide.According to the preliminary design scheme of the slope,if the rainfall for four days after the construction,the slope safety coefficient is 0.899<1.2,there is a risk of landslide.(4)Determine the slope by +3 mortar rubble slope(slope from the bottom to the top are respectively 1:1.5,1:1.5,1:1.5)+ slope using geogrid reinforcement measures as the embankment slope reinforcement engineering.The stability of the slope is evaluated by the finite element method.