The Slope Stability Analysis And Prevention Measures Of The Forest Lake Community In Kunming

The forest lake residential area slope is located in the west side of the forest lake residential area of Zhaozong Village,Heilingpu,Wuhua District,Kunming City,Yunnan Province.Since 2014,due to heavy rains,the front and middle layers of the slope have loosened and formed a landslide,which is marked as H1 landslide,If the H1 landslide has a large-scale slippage as a whole,the trailing edge slope may also have a landslide.there will be safety hazards to 28 houses,27 houses and residents of the slope,and there are residents within the scope of the damage.36 households,about 100 people,cause serious harm to the lives and property of the residents.Therefore,it is necessary to conduct a comprehensive study on the stability of the slope and the design of the prevention and control project.This paper takes the slope of the residential area of Forest Lake as the research object,and starts from the natural geographical conditions and engineering geological conditions of the slope area,and comprehensively studies the H1 landslide and the trailing edge slope through the on-site field investigation,indoor experiments and other technical means.Basic morphological characteristics,formation mechanism and influencing factors of H1 landslide.The traditional limit equilibrium method was applied to the evaluation of the stability of the H1 landslide and the entire slope.The Midas/GTS NX is used to simulate the slope,and the stress,displacement and strain are further analyzed.Combined with the evaluation results of slope stability,two kinds of slope prevention schemes were proposed and the preferred research was carried out.Finally,the effects of the control measures were numerically simulated by Midas/GTS NX software,and the feasibility of the control measures was verified by the limit equilibrium method.The main research contents and results are as follows:(1)By collecting survey data and field surveys near the study area,the regional geological and environmental conditions of the slope area are expounded,and based on this,Based on this,the characteristics of the current situation of the slope of the forest lake community and the formation conditions,deformation process and induced factors of the H1 landslide are analyzed.(2)The limit equilibrium method is used to analyze and calculate H1 landslide and slope under three working conditions.The calculation results show that the slope has insufficient safety reserve under natural conditions;it is easy to slip under extreme rain or rainy weather.Slopes need to be engineered to strengthen the treatment.(3)In order to better reflect the deformation displacement and force of each part of the slope,the slope is numerically simulated by Midas/GTS NX,and the stress,strain and displacement are analyzed.Through simulation calculations,the slope is in a basically stable state under natural working conditions.Under earthquake and heavy rain conditions,the stability of the slope is further deteriorated and it is easy to slide.(4)Based on the results of stability analysis,two sets of engineering control schemes were designed and compared,and finally determine “grid beam anchor + grass + deep drain + rib anchor Comprehensive control method for cable + drain hole + stone retaining wall + monitoring".(5)Finally,the effect of reinforcement after numerical simulation is used and verified by the limit equilibrium method.The results show that the stability coefficient is obviously improved,the displacement and shear strain are reduced,and the protection effect is very good.