The Seepage Analysis Of The Culvert Pipe Under The Earth And Rock Dam Based On ABAQUS

In this paper,ABAQUS finite element analysis software as a tool,combined with the National Natural Science Fund project “concrete dam long-term deformation characteristics of numerical analysis and safety monitoring method research”(No.51769017)and Jiangxi Provincial Department of education science and technology project“concrete dam deformation temperature effect and safety monitoring ”(No.GJJ161096).The main research contents are as follows:(1)Based on the Darcy's law,hydraulics theory and the basic equation of seepage,the basic model of seepage analysis of earth-rock dam is constructed based on ABAQUS finite element software.According to the different cross-section of the culvert and anti-seepage The numerical analysis model was established to study the mechanism of the seepage field around the culvert around the culvert.Based on the seepage mechanism and the basic model of the seepage analysis of the earth and rock dams,the influence of the culvert retaining ring on the seepage field of the surrounding soil is studied.Based on the analysis of the percolation elements around the culvert culvert good catchment ring position.(2)The basic theory of seepage calculation of earth-rock dam is studied.Based on the continuity equation of Darcy's law and incompressible liquid,the seepage differential equation of earth-rock dam and the solution condition of seepage differential equation are derived.Aiming at the saturated soil and unsaturated soil in seepage analysis of earth-rock dam,the applicability of Darcy 's law in seepage in soil is explored.Based on the working interface of the software and the main solution module,the basic principle of the finite element method is explored.Based on the seepage problem of the earth and rock dam discussed in this paper,the finite element method is used to analyze the finite element method.Application principle of dam seepage field,so as to provide theoretical support for the research after this paper.(3)The constitutive model of soil and the seepage boundary conditions of soil and rockfill dam are explored.Based on the different characteristics of Mohr-Coulomb model and Duncan-Zhang hyperbolic model,the Mohr Coulomb model is selected as ABAQUS software to analyze the seepage of dam.On the basis of the above,the two-dimensional numerical model of seepage analysis of dam body and the three-dimensional numerical model of seepage field of surrounding soil are constructed,and the steps and methods of finite element analysis of seepage field of surrounding soil are also put forward.(4)According to the three types of conditions,the seepage flow rate,the pore water pressure and the leakage slope are reduced to And the seepage field of the soil around the culvert of the dam under three kinds of working conditions is studied.On the basis of analyzing the three kinds of working conditions,the best position of the culvert is obtained according to the three different indexes,and the conclusion that the intercepting ringshould be set up at the junction of the inclined wall and culvert of the clay is put forward so as to develop Earth dam design specifications,for the actual design and construction provides a basis.