摘要
基于多孔介质饱和-非饱和非稳定渗流理论,以那板心墙土石坝为例,采用有限元法模拟正常蓄水位时不同降雨强度、降雨历时条件下的土石坝暂态渗流场,然后将暂态渗流场与极限平衡法相结合计算坝坡的稳定性,为了考虑基质吸力对坝体材料抗剪强度的影响,计算中采用修正的摩尔-库伦(Mohr-Coulomb)破坏准则。结果表明,降雨强度和降雨历时对土石坝暂态渗流场及坝坡稳定性有明显的影响。
Based on the saturated-unsaturated unsteady seepage theory of porous media,finite element method was used to simulate the transient seepage field of Naban earth rockfill dam with central core under different rainfall intensity and rainfall duration in normal water level.And then combination of transient seepage filed with limit equilibrium method was applied to calculate the slope stability.A revised Mohr-Coulomb failure criterion was adopted to consider the impact of matric suction on the shear strength variation of the dam material.The results show that the rainfall intensity and rainfall duration have a significant influence on the transient seepage of the earth rockfill dam and the slope stability.
出处
《水电能源科学》
北大核心
2016年第2期49-52,40,共5页
Water Resources and Power
关键词
降雨入渗
心墙土石坝
暂态渗流
有限元分析
边坡稳定
rainfall infiltration
earth rockfill dam with central core
transient seepage
finite elements analysis
slope stability
