Stability And Seepage Analysis Of Earth-rockfill Dams Of Ge Shan Reservoir Based On ANSYS

Geshan Reservoir is a large-scale water conservancy project currently under construction and is located on the Nomin River,a branch of the Hulan River in the Suiling County of Suihua.As a large-scale control project in the Nomin River Basin,the reservoir is of vital importance for the governance of the Hulan River Basin and its surrounding economic development.The main body of the reservoir is a homogeneous earth-rockfill dam.As a core building of the reservoir.It is crucial to ensure the stability of the earth-rockfill dam.At present,earth-rockfill dams are widely used in practical projects because of their structural characteristics.As a most common type of earth-rockfill dam,homogeneous earth-rockfill dam is also widely used in practice.Based on the ANSYS finite element platform,this paper analyzes the stability and percolation characteristics of the earth-rockfill dam under different working conditions,based on the engineering background data of the earth-rockfill dam in the pavilion.By comparing the numerical simulation results with the actual results,the feasibility of ANSYS software in the calculation of earth rockfill dam is verified.This paper uses ANSYS software to establish a two-dimensional plane model for earth-rockfill dams.The main contents are as follows:1.Summarize the research status of the finite element analysis of earth-rockfill dams at home and abroad.Discuss the related theories of the soil constitutive model.Introduce the principle and method of using ANSYS software to calculate the stress-strain and seepage of the earth-rockfill dam.2.Based on the Duncan-Chang soil constitutive model,the ANSYS software's life-death unit function was used to simulate the construction process of earth-rockfill dam with two stages: step-by-step loading construction and one-time loading construction.Analyze the stress and displacement of earth-rockfill dam during construction,completion and storage period.3.Using the strength reduction method to calculate the minimum safety factor of earth-rockfill dam slope under the D-P yield criterion,find the most dangerous sliding surface of the dam,and analyze the dam slope stability of the earth-rockfill dam.4.The fixed-mesh modified permeability coefficient method was used to calculate the relevant parameters such as the location of the seepage line of the dam,the elevation of the seepage overflow point,the seepage flow,and the hydraulic gradient,and analyzed the seepage characteristics of the earth-rockfill dam.The conclusion proves that the results of stability and seepage analysis of earth-rockfill dam by ANSYS software are reliable.The research methods and achievements of the thesis have been adopted by Heilongjiang Land Reclamation Survey and Design Institute and applied to practical engineering design.