摘要
用二维非定常饱和—非饱和渗流模型，模拟堤防的渗透和浸润面的变化情况．数值结果给出了不同时刻的孔隙水压及；无速分布，比较了不同时刻堤防上游面的浸润线变化．本研究考虑的因素接近工程实际，如洪水期间的水位变动、非但定降雨及非均匀土质等因素的影响；注重实用技术的开发，如在有限元网格划分上采用Delauny网格自动生成技术，对于多种土质的不规则多连通域能够自动生成二维有限元网格．
2D unsteady seepage model of saturated unsaturated flows for non-uniform foundation has been derived. For the multiple material domain, the Delauny triangulation technique has been used to produce finite element grid automatically. This model has been used to simulate 2D seepage flows of a supper dam, the velocity and pressure distributions are obtained. For differ-ent times, the free surface positions and compared. For lower permeability case of the dam, the results show that the dam is sta-bIe. As the model consider the practical engineering situation, it can be used to evaluate the stability of the dam.
出处
《水利水电技术》
CSCD
北大核心
1999年第5期9-10,共2页
Water Resources and Hydropower Engineering
关键词
非定常渗流
堤防
有限元
非均匀土质
二维渗流
unsteady seepage flows, finite element method, non-uniform materials
