Study On Safety Evaluation And Prevention And Control Technology Of Expressway Slope Based On Slag Deposits

With the national urbanization construction and economic development,the construction of expressway construction is extremely rapid,increasing by about 12,000 kilometers per year.Due to the vast territory of China,the engineering and environmental Geological conditions in each region are very different.As a result,the site selection of highway construction cannot avoid some Geological hazard areas.To this end,special safety assessment and prevention and control measures are needed.the study.Based on the engineering example of the slag yard as the roadbed,this paper studies the stability of the pile Slope under different working conditions,the landslide induced by the local excavation of the roadbed,and its control measures.The following research results have been achieved:(1)Determine Geophysical parameters based on Geological survey data and field test data.Limit equilibrium and numerical simulation were used to analyze the stability of the Slope before and after excavation,the stress and strain characteristics of the internal rock and soil,and the characteristics of the roadbed displacement and deformation caused by the excavation.(2)Based on the analysis of local meteorological data for many years,the parameters of rainfall conditions were analyzed and the stress-Seepage coupling method was used to study the characteristics of non-saturated sedimentary Slopes under different rainfall intensity and duration conditions,rainwater infiltration,and Slope stability The characteristics of the coefficient change,the slip mechanism and evolution law of the dangerous Slope,the displacement and deformation characteristics of the Slope and the roadbed are analyzed.(3)Based on the characteristics of the Taft earth Quake wave distribution and the local seismic parameters,the finite element numerical simulation method was used to analyze the Slope dynamic response characteristics,stability change laws,dangerous areas,and roadbed displacement and deformation characteristics under different peak acceleration earth Quakes.(4)According to Slope failure characteristics and weak positions under different working conditions,combined with the characteristics of Slope stability,Slope reduction and load reduction,prestressed anchor cable anti-sliding pile reinforcement,prestressed anchor cable anti-sliding pile and Slope cutting are combined.The feasibility analysis of the three governance measures was carried out,and the numerical simulation method was used to evaluate its new reinforcement effect.The best governance plan was determined by combining economic rationality and safety and reliability.