Upper Limit Analysis And Numerical Verification Of The Stability Of Reinforced Slope

When the stability of slope is insufficient,it is necessary to reinforce it to improve the anti-sliding ability of slope.The stability analysis methods of slope reinforcement are mainly divided into theoretical analysis and numerical simulation.The former is more convenient while the latter can obtain more stress and displacement information.In this paper,the stability of two common reinforced slopes?pile slope and reinforced soil slope?,especially the stability under the action of earthquake,is analyzed by combining the limit analysis and FLAC^3D method.In this paper,the upper limit method based on discrete technique is used to construct the failure mechanism of pile and reinforced slope.Based on the analysis of energy consumption,an analytical upper limit solution is provided for the safety factors of the two reinforced slopes.Secondly,FLAC^3Dis used to analyzing the typical working conditions of two kinds of reinforced slopes.By comparing the safety factors obtained by the theoretical and numerical methods,the accuracy of the analytical results of the upper limit analysis was verified,at the same time,the reliability of the stability evaluation of the reinforced slope by the theoretical and numerical methods is illustrated.Finally,the seismic load is included to analysis the stability of the reinforced slope under the action of earthquake,the influence of the seismic load on the stability of the reinforced slope is explored,and the reference is provided for the seismic design of the reinforced slope in practical engineering.The upper method of limit analysis based on discrete failure mechanism can be used to quickly determine the stability of reinforced slopes under different conditions,which providing a fast and accurate method to evaluate the stability of reinforced slopes in actual projects.The numerical analysis method is focus on the interaction between the slope reinforcement structure and the soil layer and the internal force response rule of the slope under different working conditions.Especially under the action of earthquake,using the secondary development of FISH language,a calculation method of dynamic safety factor is proposed,which can give the slope safety factor change curve during earthquake.In this paper,the traditional limit analysis upper limit method based on plasticity theory and numerical analysis method are combined,which not only can quickly and accurately evaluate the stability of the reinforced slope,but also expounds the reinforcement from the response rules of stress and strain inside the reinforced slope.The slope reinforcement mechanism provides a scientific basis for the stability analysis of reinforced slopes.