Stability Analysis And Treatment Of The First Middle School Slope In Anyuan County

Aiming at the problem of life-safety of people's property seriously affected by the deformation of the slope on the north side of the No.1 Middle School of Anyuan County,the drilling and sampling on site and the in-hole in-situ test(standard penetration test)of the soil were performed.Soil samples were subjected to routine tests such as moisture content,severity,cohesion,and internal friction angle to obtain reliable physical and mechanical properties of rock and soil.The initial stability of the slope is calculated using the Rigid geotechnical software and the Swedish segment method.The Rocscience and FLAC 3D finite element software is used to analyze the stability of the slope deformation and the internal failure of the slope under the condition of self-respecting gravity.Numerical simulation study.Combined with the existing geological history data,based on the SEEP/W seepage module in Geo-studio software,the stability and potential seepage law of the slope under rainfall conditions were simulated.Through the comparison of the safety factors before and after treatment under the above two conditions,a scientific and rational slope environment management plan was formulated to demonstrate the feasibility of the treatment plan.In summary,the conclusions of this paper are as follows:Under natural conditions,through the solution of the safety factor and numerical simulation results,it can be seen that the potential sliding surface is located near the maximum displacement.From the vertical displacement cloud diagram,it can be seen that there is a certain movement on the outside of the top of the slope,and the cracks on the top of the slope are caused by this,combined with plasticity.The area distribution map shows that a certain degree of tensile damage occurs on the outside of the top of the slope,and the displacement gradually decreases from the top of the slope to the vicinity of the slope toe,and shear failure occurs near the toe.According to the distribution map of slope plastic zone,it is known that the inside of the slope is mainly shear failure,and the top of the slope is under the action of sliding weight,and a crack is formed after tensile damage,and then shear failure occurs at the toe part and goes to the next small part.The area reaches a yielding state until it is mainly shear failure.Slope along the sliding surface will have a small range of shear slip phenomenon,combined with the above displacement stress cloud map,in the case of self-weight,the slope is relatively stable,the probability of landslide is small.Under continuous rainfall conditions,the results of software analysis show that in the process of rainfall,slope surface and internal pore water pressures increase significantly,the slope's own weight increases,the sliding force increases,and the slope becomes unstable.There are fissures at the toe,cracks from the toe to the top of the slope,and cracks at the top of the slope,causing a fracture surface at the top of the slope.As the pore water pressure increases,the sliding surface softens and there is water between the soil particles.The effect is to reduce the adhesion between soil particles and reduce the shear strength,leading to landslide disasters.Through the analysis of the mechanism of retaining wall mechanism and anti-overturning,anti-slip,calculation of foundation bearing capacity and safety factors under the two conditions before and after slope treatment,it can be seen that the safety factors obtained under the two kinds of working conditions meet the standard requirements.It shows that the proposed retaining wall treatment plan is feasible.