Study On Slope Stability Of High Filled Channel In Jiaozuo Section Of South-to-North Water Transfer Project

China is a country with many geological hazards.Among them,the problem of slope stability accounts for a large proportion.Especially with the vigorous construction of water conservancy construction in our country,the slope of the reservoir bank is often unstable,which poses a serious threat to the country and people.Water penetration can seriously affect the stability of the landslide.Slope stability is one of the three classic problems in the field of geotechnical engineering,and generally includes natural slopes and artificial slopes.The slope safety factor is usually used to evaluate the stability of engineering slopes such as highway subgrades,dams,and bank dams.In this paper,the high-filled channel slope of the Jiaozuo section is taken as the research object in the past five years of the water-passing operation of the middle route of the South-to-North Water Transfer Project.The slope stability under seepage is calculated and analyzed.The reliability of the finite element strength reduction method in solving the problem of slope stability analysis is verified by a basic example.Combined with the actual situation of the operation of the center line project,considering the design water level and increased water level,the typical filling section of the engineering pile number IV40 +300 is selected.Based on the basic theory of seepage and the finite element calculation method,ABAQUS finite element calculation software is used in combination.The strength reduction method of finite element method is used to calculate and analyze the instability criterion based on the abrupt displacement of the characteristic part of the slope.The thesis is divided into three parts:1.Introduce the basic characteristics of the middle route of the South-to-North Water Transfer Project,and briefly explain the background and significance of the slope stability research of the high fill channel project.The research progress and current status of slope stability under seepage,the basic theory of seepage and the definite conditions of seepage equation are introduced.The principle method of finite element method to realize the calculation of seepage stability is introduced.2.with the help of basic examples,the reliability of the method used in this paperis verified.Based on the engineering data of a typical section of the Jiaozuo section(pile number IV40+300),the physical and mechanical indexes,rock and soil strength parameters,and structural set parameters of the research object were determined,and a finite element calculation model was established.3.Calculation and analysis of slope stability factors without considering seepage and seepage.Among them,in combination with the actual operating conditions of the Jiaozuo section,the above two cases include two conditions: design water level and increased water level.The slope stability calculations are performed under two conditions,and the stable slope of the channel is analyzed.There are five factors:cohesion,internal friction angle,soil weight,slope height,and slope angle.The sensitivity analysis of the main factors affecting the slope safety factor is performed.