Numerical Simulation Of Prestressed Anchor Reinforcement Of High And Steep Slope Analysis And Field Testing

Our country is a mountainous,hilly area accounted for land area of about two thirds,with a large number of natural and artificial slopes.In the process of rapid development of economy of our country,across the country built a large number of transportation,water conservancy,mines,civil construction,and other facilities,and formed a large number of high and steep slope engineering,to Chongqing,Dalian,Qingdao,such as the "mountain city",for example,only the downtown area of construction slope number in the thousands.Prestressed anchor reinforcement technology is one of the most important supporting methods for slope engineering in China,with its advantages of small disturbance,fast construction,safety and economy.The Dalian Shimen high mountains and steep slope engineering as the background by field measurement and numerical simulation combined means,of prestressed anchor reinforced slope excavation branch support process numerical simulation analysis,and field measurement,extraction of measured data and the simulation results are compared and analyzed,and the achievements obtained in this paper,the main research work:(1)The 3D elasto plastic finite element analysis software,to Dalian Shimen high mountains and steep slope excavation process numerical simulation focuses on the analysis of the slope in the excavation process of excavation surface horizontal displacement,slope of the vertical settlement and bolt stress variation characteristics.Based on the finite element strength reduction method,the variation law of plastic zone under different working conditions is analyzed.Study shows that the plastic zone along with the slope of the excavation in the continuous change;when the slope of the excavation support,the plastic area to the slope of the depth of the development of the slope,the slope tends to be stable.(2)The three dimensional elastic plastic finite element analysis software,the parameters influence the slope stability and deformation analysis:mainly carries on the analysis and research of different prestress and different anchor branch support spacing,different excavation slope stability and deformation law.Summarizes some regular understanding,and provides some reference value for the support design of slope under different parameters.(3)The horizontal displacement,vertical settlement and axial force of the anchor are obtained through the field test,and the monitoring data and simulation results are compared and analyzed.Analysis results show that numerical simulation results and the experimental data are in good agreement,but in numerical simulation to establish calculation model,if can give full consideration to the practical problems in engineering and numerical simulation method can better on the slope safety and stability to make a qualitative analysis.