仁宗海水库电站防渗系统设计及三维渗流计算  

Design of Seepage Prevention System and Three-dimensional Seepage Calculation for Renzonghai Reservoir Hydropower Station

作　　者：张凤财 卢羽平 姜媛媛 窦向贤 ZHANG Fengcai;LU Yuping;JIANG Yuanyuan;DOU Xiangxian(PowerChina Chengdu Engineering Corporation Limited,Chengdu,Sichuan,610072)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司

出　　处：《红水河》2019年第5期1-4,共4页Hongshui River

摘　　要：仁宗海水库电站堆石坝建于复杂深厚覆盖层上,防渗系统由土工膜面板+河床悬挂式防渗墙+两岸灌浆帷幕组成。为了验证设计防渗系统的合理性,采用饱和稳定渗流有限元法、渗流量插值网格法进行了三维渗流计算分析;同时采用二维有限元方法,就防渗系统不同部位存在缺陷对渗流场的影响进行了敏感性分析。计算成果表明,大坝渗流场分布符合一般规律,坝体和坝基发生渗透破坏的可能性很小,总渗漏量较小,设计的防渗系统是经济的、合理的、可靠的。建议加强防渗系统的施工质量控制,尤其应避免防渗系统浅表部缺陷。The rock-fill dam of Renzonghai Reservoir Hydropower Station is built on complex and deep overburden,its seepage prevention system consists of geomembrane face slab,suspended cut-off wall of riverbed and grouting curtain on both sides.In order to verify the rationality of the design of seepage prevention system,the saturated steady seepage finite element method and seepage discharge interpolation grid method are used to calculate and analyze the three-dimensional seepage flow.Meanwhile,the sensitivity analysis of the influence of defects in different parts of the seepage prevention system on the seepage field is carried out by using two-dimensional finite element method.The calculation results show that the seepage field distribution of the dam conforms to the general law,the possibility of seepage failure of the dam body and foundation is very small,and the total leakage is small,the designed seepage prevention system is economical,reasonable and reliable.It is suggested that the construction quality control of the seepage prevention system be strengthened,especially the superficial defects of the seepage prevention system should be avoided.

关 键 词：面板堆石坝 防渗系统 三维 渗流 仁宗海水库电站 

分 类 号：TV139.14[水利工程—水力学及河流动力学]