Numerical Simulation on the Engineering Behavior of Embankment over Sloped Weak Ground

Major engineering accidents such as slump,large lateral deformation occurred when people constructed fill embankment on sloped weak ground.Using nonlinear finite element method and strength reduction method,simulating the mechanical behaviour of the embankment of staged construction,building numerical analysis model of embankment over sloped weak ground which is only loaded with gravity,analyzing the relationship between deformation and stability on soil body,combining the results of geotechnical centrifuge model experiment,this paper comprehensively demonstrates the effect of the weak surface layer and lateral slope of ground on the engineering behavior of embankment over sloped weak ground.Research results show that sloped weak ground can not be simply regarded as the linear superposition of sloped ground and weak ground which are not equal-weight.Weak surface layer and lateral slope of ground amplify the lateral displacement and vertical settlement,and change the shape of the potential slip plane.These factors lead to reduce the stability of embankment,and in engineering people need to attach great importance to the lateral displacement of toe and the treatment of weak surface layer.The nonlinear finite element method with strength reduction method can synchronously analyze the deformation and stability of embankment over sloped weak ground which is only loaded with gravity.