茨哈峡水电站砂砾石填筑料水平渗透变形特性试验研究

Study on Horizontal Permeability and Filtration Erosion Test of Sand and Gravel Dam Material for Cihaxia Hydropower Station

采用中国电建集团西北勘测设计研究院有限公司自主研制的高水头大型渗透试验设备,通过对茨哈峡水电站砂砾石填筑料的平均级配试样进行高水头原级配水平渗透变形特性试验,模拟在坝体面板失效和渗流下游坝体结构稳定的情况下填筑料的渗透变形演变过程,提出了渗透变形演变的基本规律,可为茨哈峡水电站坝体填筑料的级配设计优化、渗透稳定安全性论证提供数据参考。

The high-head large-scale permeability test equipment independently developed by PowerChina Northwest Engineering Corporation Limited is used to conduct high-head horizontal permeability test through the average gradation samples of the gravel filling materials of the Cihaxia Hydropower Station.The characteristic test simulates the seepage deformation evolution process of the filling material under the condition of the dam face failure and stable downstream dam structure,and the basic law of seepage deformation evolution is proposed,which provides data reference for concrete mix design optimization,permeability stability and safety demonstration of the dam filling material for the Cihaxia Hydropower Station.