Research On Dynamic Stability And Reinforcement Engineering Optimization Design Of Bedding Slope

The southwestern region of China has numerous mountainous areas,complex geological conditions,and is located in an earthquake active zone.Geological disasters such as collapses and landslides caused by high-strength earthquakes occur frequently.In the design of slope reinforcement in hydropower projects,prestressed anchor cables are often used to reinforce high and steep rock slopes.However,the theory of anchor cable reinforcement design lags far behind engineering practice,and the development of anchoring technology with excellent seismic performance is urgent.The optimization of anchor cable reinforcement can provide guidance for practical engineering,and has important theoretical significance and practical application value.This article takes rock slopes containing weak interlayers as the research object,and uses a combination of numerical simulation and theoretical analysis to conduct sensitivity analysis on key anchoring parameters.The focus is on exploring the response law of slopes under static and dynamic loads,as well as the impact of anchoring parameters on slope stability.Establish a model of bedding rock slope with weak interlayers,and verify the optimization design effect.The main results are as follows:(1)Under both dynamic and static forces,the variation patterns of slope displacement and maximum shear stress are basically consistent.The displacement and maximum shear strain increment in the X and Z directions of the slope are mainly controlled by the spacing of anchor cable arrangements.The effect of anchor cable spacing on the displacement in the X and Z directions of the slope is that as the anchor cable spacing increases,there is a trend of first decreasing and then increasing.As the spacing between anchor cables increases,the maximum shear strain increment also shows a trend of decreasing first and then increasing,with a significant change in amplitude;The influence of the length of the anchoring section on the displacement in the X and Z directions of the slope is: the trend increases with the increase of the length of the anchoring section.The maximum shear strain increment shows a trend of first decreasing and then increasing as the length of the anchoring section increases,with little variation;The influence of anchor cable inclination angle on the displacement in the X and Z directions of the slope is that the displacement shows an increasing trend with the increase of anchor cable inclination angle.As the inclination angle of the anchor cable increases,the maximum shear strain increment continues to increase.Among the spacing of anchor cable arrangement,length of anchor section,and inclination angle of anchor cable,the spacing of anchor cable arrangement has the greatest impact on slope stability under dynamic and static actions.(2)By monitoring the axial force of the anchor cables,the stress states of the anchor cables in different reinforcement schemes are obtained.Key anchoring parameters are optimized based on indicators such as slope displacement,maximum shear strain increment,and anchor cable axial force to obtain the optimal anchoring parameters.The optimized reinforcement scheme is verified through numerical simulation.(3)Based on the optimal anchoring parameters studied earlier,the slope was optimized for anchoring parameters.After optimization,a significant reduction in displacement was observed.Under static force,the maximum displacement in the X and Z directions decreased compared to before optimization,significantly improving the stability of the slope,preventing further deformation and damage,and improving the stability of the slope.After optimizing the anchoring parameters of the slope and inputting the Wenchuan earthquake wave,the displacement in the X direction and the maximum displacement in the Z direction of the slope are also reduced,effectively reducing the deformation and failure of the slope caused by earthquake action.(4)The stability of a bedding slope in a certain reservoir area under the action of the Wenchuan wave was analyzed.The rock mass formed by weak structural planes locally generated permanent displacement,and its potential failure mode was manifested as sliding along the weak rock layer,which was overall stable.After optimizing the parameters of prestressed anchor cables,the reinforcement plan is as follows: the length of the anchorage section is 8m,the anchorage angle is 8 °,and the anchorage spacing is 6m.Simulation analysis of the reinforcement of the local slope shows that the optimization of anchorage parameters can effectively reduce the displacement of the slope under dynamic conditions,which is conducive to the stability of the slope under seismic loads.This paper conducts theoretical analysis and numerical simulation on the reinforcement design of prestressed anchor cables for rock slopes,summarizes the dynamic response and failure laws of layered rock slopes containing weak interlayers under seismic loads,explores the influence of prestressed anchor cable anchoring parameters on slope stability,and optimizes the anchoring parameters.The relevant research results obtained in the article can provide important theoretical basis and technical reference for the seismic optimization design of inclined layered rock slopes in the future.