Study Of Slope Stability And Reinforcement Measures On The Left Bank Of Delsi-tanisagua Hydroelectric Project

Based on dercy hydroelectric power station left bank countertendency slope as the research object,this paper throughs a concrete analysis of slope’s engineering geological conditions and main influencing factors of slope stability,put forward the concept analysis model of anti dumping slope,considere that the deformation and failure mode of the slope is the bending deformation mode,and thike that caused slope table area ripping the main causes for the tilting characteristics of fractured rock,in addition that it is also closely related to long time rainfall,artificial excavation and earthquakes.The simulation of deformation field,stress field and displacement field of slope is simulated by using the finite element software FINAL,make the stability safety evaluation,and put forward reasonable treatment measures.The specific research contents and results of this paper are as follows:First of all,summarized the main influencing factors of dercy hydropower project toppling rock slope stability and applied in the finite element analysis and calculation of these factors.Secondly,based on the layered rock slope instability and failure of the geological characteristics and model,this paper discusses its applicable method for analyzing the stability of main Goodman-Bray method and cantilever beam theory.Based on the cantilever beam theory,the analysis and calculation method of the instability length of the anti dumping rock column is obtained,and applies stability analysis of on the left bank of delsi-tanisagua hydroelectric.The calculation method can be used as an effective reference for the finite element method.After the reinforcement of prestressed anchor cable,the mechanical properties of the slope can be improved,and the stress state of the slope can be changed,it is not reasonable to deal with which as a simple slope.Therefore,this paper proposes to use the mechanical characteristics of the support structure to characterize the stability of the slope after reinforcement.Specifically the difference between the stress increment caused by the deformation of the prestressed anchor cable and the increment of the allowable stress under various operating conditions,the ratio of which to the allowable stress increment is expressed in the slope stability.Finally,by using the finite element method of discretization delsi-tanisagua hydroelectric station left bank slope stability analysis,and the stability of the slope after excavation and reinforcement,and dumping of large hydropower rock slope deformation and governance has a more profound understanding.