| This paper, combined with the National Natural Science Fund Project(50779081), uses the means of Numerical Simulation,studies on the infiltration discipline and leakage mechanism of earth-rockfill dam,So it can provide a theoretical basis of the reinforcement and the Diagnosis of earth-rockfill dam.The main work of this thesis is as follows:(1)Through the collection of substantial domestic and foreign literature, to learn the dangerous earth-rockfill status at home and abroad, and summarized the reasons for embankment dam seepage damage, as well as diseases of the type of earth-rock dam, then set up the theoretical model of earth-rockfill dam based on two types of diseases earth-rockfill dam.(2)Take advantage of the theoretical model of disease earth-rockfill dam, assumed that the seepage obeys the Darcy's law, assumed that not consider soil and water compression, Soil pore size and porosity not change when infiltration, assumed that soil water saturation of the body unchanged.On the basis of this hypothesis, set up two kinds of two-dimensional model of earth-rock permeability.(3)Using of the finite element analysis software FLAC3D,on the analysis of stress and pore pressure of the two disease models, Summing up the law of earth-rock permeability and the mechanism of earth-rockfill dam seepage. No matter what kind of earth-rock dam seepage damage, infiltration of soil damage from a weak start of the flow of exports, Soil particles to flow away, Then continue to the upper reaches, Finally the formation of seepage on the downstream channel connectivity.(4)This thesis provides a theoretical basis of the reinforcement for the earth-rock- fill dam,and on the basis of reinforcement of existing technologies in earth-rock dam, makes recommendations to the existing earth-rockfill dam reinforcement technology . |
