Discrete Element Simulation And Complex Network Evaluation Of Stability Of Rock Slope Under Earthquake And Percolation

The western region of China is relatively high in elevation,high in mountains,natural slopes many,but the western region is an area prone to earthquakes.Affected by various factors,landslides can easily occur,which has a great impact on people's property and safety,as well as the construction of the country in the western region.Therefore,it is of great significance to study the factors causing landslides and the mechanism of slope failure.There are many factors causing landslides,such as natural factors and human factors.Such as the slope slip damage caused by the earthquake occurs mainly in the joint development of good rock mass,to greatly enhance the strength of local rock,when the earthquake effect,if there is a small regional shear failure has formed a small crack,under the action of earthquake load last,local cracks will be amplified,was divided,and completely destroyed.Due to the existence of joints,there are cracks in the rock.Under the action of fluid flow,the cracks will gradually become larger,resulting in insufficient strength of the rock mass and eventually deformation and failure.Firstly,the dynamic response of rock slope under the action of seismic wave is studied by discrete element program UDEC.When the slope is under gravity balance,a cosine seismic wave with a frequency of 5Mpa of 30 is applied to the bottom of the slope.Significant slip failure occurred in the slope and top area of the rock slope.Secondly,discrete element program UDEC is used to simulate the percolation of rock slope and analyze the reasons of instability.By changing water level slope on the right side of the boundary conditions for the variables,analyzing the reason of percolation erosion of slope stability based on the slope of the displacement,velocity,stress,pore pressure and flow rate were analyzed,and the parameters,such as monitoring and the easiest to instability in the region,the results show that on the right side of the water level slope is 6 m,8 m,various parameters are shown position of slope toe most prone to damage,but the slope foot or in a stable state,when the right side of the water level rises to 10 m,slope foot position above a block sliding failure happens,may be the cause of damage,slope toe place too fast flow velocity and water level rise,The pore pressure increases and the tensile stress of the block is too large.Then the complex networks theory is introduced to analyze the dynamic response of rock slope under seismic action,chose three representative topology parameters incomplex networks(average degree,the average clustering coefficient,average path length),with different intensity earthquake loads for variables,get the corresponding complex network topology model of rock slope model,analyze the seismic load intensity and the relationship between the three topological parameters.Finally,relevant parameters of complex networks(weight of edges,weight of nodes,average shortest path,clustering degree,etc.)are introduced,and the node contraction method is used to solve the key nodes in complex networks to find the key nodes in the collapse failure of dangerous rock slope,and UDEC is used for simulation to verify its correctness.