大型贮灰场的三维饱和–非饱和瞬变流数值模拟及非饱和参数试验

基于Narasimhan T N的理论,研究了大型复杂工程问题的三维饱和–非饱和瞬变流数值模型,编制了相应的计算机程序。成功地对占地1.1km×1.0km×72m的大型不规则域--上冶峪干贮灰场进行了历时87 d的饱和–非饱和瞬变流数值模拟,演绎了场内粉煤灰体的含水率、饱和度和孔隙水压力在洪水、降雨、排渗和蒸发等作用下,随时间变化的规律和过程。同时,还进行了特殊工程材料--粉煤灰的水分特征曲线和非饱和渗透系数K(h)的试验。

Numerical model of three dimensional saturated-unsaturated flow for a flyash lagoon of thermal power plant

A three dimensional saturated-unsaturated numerical model was applied to the engineering problem of various saturated porous media with complex boundary condision.There was a flyash lagoon of thermal power plant in the mountain valley.The model domain with space of 1.1 km×1.0 km×72 m was large and quite irregular.In the numerical simulation,some conditions were taken into account,such as the rainfall infiltration,the drainage,the evaporation and the various water level of reservoir caused by the mountain torrents.In addition,using a series of tests and analysis,the water characteristic curve and unsaturated conductivity of the coal ash as a special engineering material were determined.