大坝渗流基流的分析模型研究  

An analytic model for base flow of dam seepage

作　　者：顾冲时[1] 胡灵芝[1] 张乾飞[1] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098

出　　处：《岩土力学》2005年第7期1033-1037,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金重点项目(No.50139030);国家重点基础研究发展规划资助项目(NO.2002CB412707);教育部博士点基金(No.20020294005);教育部"跨世际优秀人才培养计划"基金资助项目(No.2003512643)。

摘　　要：深入研究了库水位等变化对渗流变化滞后效应,探讨了渗流的滞后模型,利用该模型进行优化分析,确定了渗流滞后天数和影响天数以及上游有效水深等参数;并借助于上游有效水深,将非稳定渗流计算问题转化为稳定渗流的求解问题,简化了计算;在此基础上,结合实测资料及渗流分析,建立了大坝渗流基流的分析模型。算例表明:建立的模型能较好地反映基流的变化性态。The hysteresis effect of seepage variation caused by reservoir water level variation is deeply studied; and then a hysteresis seepage model is presented. By use of this model and optimization analysis,hysteresis days and effective water depth upstream are determined. By introducing effective water depth upstream, an instability seepage problem is converted to a stability seepage one. Based on this simplification and combining measured data and seepage analysis, an analytic model for base flow of dam seepage is proposed. The example shows that the model can simulate behavior of base flow.

关 键 词：大坝 渗流 滞后 基流 模型 

分 类 号：TV223[水利工程—水工结构工程]