Stability Evaluation Of Loess High Slope And Numerical Simulation Of Whole Construction Process

Along with the rapid development of China's economy,a large number of infrastructure projects have been constructed.As a result,increasing number of rock and soil were artificially excavated,formed a large number of artificial slopes.Slope engineering plays an important role in construction project,whose stability determines whether the infrastructure could normally operation,and in order to protect the natural environment and reduce the occurrence of geological disasters,the study of slope stability and the excavation process is extremely necessary,in the process of continuous exploration,a certain research foundation and achievements have been formed for the problems of slope.In this paper,the ANSYS finite element software is used to simulate and analyze the slope stability and the excavation process.First of all,we have studied and researched a great deal of foreign literatures,including the research status of stability analysis method,the research course of slope engineering and the numerical simulation method of slope;there is one more point,introduced the present status of all kinds of possible instability of slope,impact factors of slope stability,supporting form and application scope.In the third chapter,the theory of strength reduction method used in ANSYS simulation of slope stability is analyzed,and the judgment basis of stability evaluation by this method was compared to limit equilibrium method.Subsequently,slope stability is simulated according to the example of slope engineering.The elastic-plastic finite element model and the strength reduction method were used in the simulation.The stability coefficient was determined by the position of the plastic zone and the convergence of the calculation process.In the fourth chapter,firstly,the nonlinear mechanics issues caused by unloading of slope excavation were studied,and the applications of slope excavation in ANSYS were introduced.Then,the stability of the slope excavation was analyzed by the finite element method according to the engineering example,including without excavation,after excavation of the slope step and the excavation of down step.The results illustrate that the slope is stable under three conditions,and accordance with the engineering practice.The fifth chapter mainly used the long-distance automatic monitoring system to monitor the stability of the loess high slope after support.Through the analysis of the monitoring data,we could obtain the slope stability state of after support and tendency of geological disasters.The results reveal that the slope is stable after support,the support structure has a good reinforcement effect and meet the stability requirements of structure,and the monitoring results can play a guiding role for the similar geological conditions.