Dike Seepage Analysis Considering Spatial Variability of Hydraulic Conductivity
The spatial variability of hydraulic parameters has a significant impact on the seepage conditions of dike,and quantitative analysis can provide guarantee for their safe operation.In this study,a non-intrusive random seepage a-nalysis framework was developed based on the theory of random fields.The study investigated the variation patterns of seepage control index,such as hydraulic gradient and seepage discharge,in complex dike under different random field pa-rameters.The results revealed that for every 0.2 increase in the coefficient of variation,the maximum value of hydraulic gradient in clay within the dike increased by 20.4%,while in medium sand,it increased by 60.5%.The influence of spa-tial variability of hydraulic parameters cannot be ignored.Furthermore,when considering the random seepage character-istics of all materials within the dike simultaneously compared to considering the random seepage characteristics of a sin-gle material only,there are small fluctuations in the maximum hydraulic gradient and flow within the clay,which imply that as the primary impermeable material,the seepage safety of clay is mainly influenced by its own material properties.
dikehydraulic conductivityseepage indexspatial variabilitynon-intrusive random seepage
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