不同运行水位工况下库盆三维渗流场计算及渗透稳定分析OA

Taking a reservoir project as an example,a three-dimensional finite element model of the seepage field was established to analyze the phreatic line and total-head line within the dam,seepage discharge from the reservoir basin,and the variation patterns of hydraulic gradients in different materials under the normal reservoir water level,normal drawdown,and rapid drawdown conditions,thereby revealing the mechanism by which the reservoir water level affects the dam seepage field.The results show that the concrete face slab and geomembrane can effectively lower the elevation of the phreatic line within the dam,reduce seepage from the reservoir basin,and decrease the hydraulic gradients of different materials.In addition,no seepage hysteresis occurs during normal or rapid drawdown,and the probability of seepage failure in the dam is low.