Method Of Finite Element Limit Analysis For Embankment Bearing Capacity

With the rapid development of China’s economy,various types of basic engineering construction have also been vigorously developed,and highway engineering construction is an important one.The mountainous area of China accounts for 2/3 of the total land area.In the process of highway engineering construction,it is inevitable that the road needs to be built on the slope.If the slope is unstable,it will bring huge life and property loss.Therefore,the bearing capacity of the embankment slope has an important impact on the safe construction and use of the project,but the factors affecting the embankment bearing capacity are numerous and complex,so it is necessary to conduct an in-depth study on the embankment bearing capacity.In this paper,the research on the bearing capacity of the slope foundation is carried out,and the following work is completed:Firstly,from the theoretical analysis,experiment and numerical simulation,the development history and research status of the bearing capacity of footings on slopes are summarized.The development of the finite element limit analysis method,the traditional calculation method of the bearing capacity of the slope and the finite element limit are expounded.Analyze the basic principles of the upper and lower bound methods,and briefly introduce the slip line difference algorithm and the potential slip line theory;Then,considering the influence of slope height,slope angle,overload and slope soil cohesion on the embankment bearing capacity under undrained conditions,the model is modeled for different working conditions,and upper and lower limits of finite element limit analysis are used to study it.The value of the embankment bearing capacity are dimensionless,and the variation law of the bearing capacity coefficient p/γB is discussed.The failure mode is analyzed by the energy dissipation diagram,and then compared with the existing literature results to verify the rationality;Then,the pseudo-static method is used to simulate the traffic load,the stability or bearing capacity of the slope under traffic load are analyzed.The stability of soil shear strength and shear strength of soil when slope is just unstable is the stability.The safety factor is used to draw the calculation results into a graph.Through the analysis of the chart,the variation law of the stability and bearing capacity of the embankment is discussed;Finally,the finite element limit analysis method is applied in the actual project.Firstly,the method of this section is used to calculate the embankment in the engineering example,and the governance measures and solutions are proposed for the parts of the engineering example that do not meet the requirements of the specification,and then The embankment is calculated until the specifications are met.