Multi-case Test And Numerical Simulation Calculation Of Long-water Immersion Embankment Project With High Water Level

Due to its special structure and filling materials,Heilongjiang river embankment has produced phenomenons that are not conducive to the stability of slope because of long-term soaking of high water level and sudden drop on upstream side.By exploring the structural and internal seepage stability of embankment,we can find out whether it can meet operational requirements and avoid accidents such as landslide and dam break.This paper considers embankments,geology,groundwater and other factors to analyze the damage mechanism of embankments during the flood season with long-term soaking of high water level and sudden drop.Variety of soil materials for study conditions are studied the seepage and anti-sliding stability of embankments during floods.Sampling and physical-mechanical tests of soil were conducted.Based on this,the embankment stability test of sandbox model during long-term soaking of high water level and sudden drop is designed and tested.The stability of slope,seepage field and internal soil-water pressure are observed.According to the summary of stability analysis methods for slope,numerical simulation was used to study the embankment stability,soil strength parameters,seepage lines and seepage gradient in different sections,and the results of the sandbox tests are verified and supplemented.The analysis shows that after long-term soaking of high-level water in soil,the strength of different sections decrease rapidly in a short period of time.The seepage lines are gradually compressed and concentrated at the foot of slope,and the outflow points are located the foot and seepage gradient is the largest.The cohesive soil model is more susceptible to large infiltration damage due to permeability coefficient and other factors than the sand model in sudden drop of water level condition.