水科学与水工程2009，Vol.2Issue(1)：58-73,16.DOI:10.3882/j.issn.1674-2370.2009.01.006
Three-dimensional stochastic seepage field for embankment engineering
Three-dimensional stochastic seepage field for embankment engineering
摘要
Abstract
Owing to the complexity of get-engineering seepage problems influenced by different random factors, three-dimensional simulation and analysis of the stochastic seepage field plays an important role in engineering applications. A three-dimensional anisotropic heterogeneous steady random seepage model was developed on the basis of the finite element method. A statistical analysis of the distribution characteristics of soil parameters sampled from the main embankment of the Yangtze River in the Southern Jingzhou zone of China was conducted. The Kolomogorov-Smimov test verified the statistical hypothesis that the permeability coefficient tensor has a Gaussian distribution. With the help of numerical analysis of the stochastic seepage field using the developed model, various statistical and random characteristics of the stochastic seepage field of the main embankment of the Yangtze River in the Southern Jingzhou zone of China were investigated. The model was also examined with statistical testing. Through the introduction of random variation of the upstream and downstream water levels into the model, the effects of the boundary randomness due to variation of the downstream and upstream water levels on the variation of simulated results presented with a vector series of the random seepage field were analyzed. Furthermore, the combined influence of the variation of the soil permeability coefficient and such seepage resistance measures as the cut-off wall and relief ditch on the hydraulic head distribution was analyzed and compared with the results obtained by determinate analysis. Meanwhile, sensitivities of the hydraulic gradient and downstream exit height to the variation of boundary water level were studied. The validity of the simulated results was verified by stochastic testing and measured data. The developed model provides more detail and a full stochastic algorithm to characterize and analyze three-dimensional stochastic seepage field problems.关键词
anisotropic random seepage field/three-dimensional seepage finite element method/Monte Carlo simulation/inhomogeneous permeability coefficient/stochastic disturbance ofhydraulic head boundaryKey words
anisotropic random seepage field/three-dimensional seepage finite element method/Monte Carlo simulation/inhomogeneous permeability coefficient/stochastic disturbance ofhydraulic head boundary分类
建筑与水利引用本文复制引用
Ya-jun WANG,Wo-hua ZHANG,Chang-yu WU,Da-chun REN..Three-dimensional stochastic seepage field for embankment engineering[J].水科学与水工程,2009,2(1):58-73,16.基金项目
This work was supported by the National Natural Science Foundation of China (Grant No. 50379046) and theDoctoral Fund of the Ministry of Education of China (Grant No. A50221). （Grant No. 50379046）
