瀑布沟心墙砾质防渗料防渗与抗渗性能研究

Study on Seepage-Resistivity and Properties of Seepage Prevention of Materials used for Core wan of Pubugou Dam

瀑布沟水电站大坝在国内首次将砾质士用作高土石坝心墙防渗料，为充分了解砾质上的防渗、抗渗性能，在填筑标准确定之后，系统地研究了粗、细骨料含量、填筑状态和渗透比降对土料防渗能力的影响，并对土料下游加反滤后抗渗能力的变化及淤塞情况进行了研究，全面评价厂上料的适用性，为工程渗流控制设计提供了依据。

Pubugou Hydropower Station dam is the first one to apply gravelly soil as seepage-prevention materials in China. After determination of filling standard, the effectS of course aggregate content, fine aggregate content, filling status, and percolation gradient on capacity of seepage prevention of soil materials were systematically studied to work out seepage prevention and seepage resistivity of gravelly soil. After a reversed filter was added to its downstream, changes of seepage-resistivity and siltation were also studied.Suitability of soil materials was overall assessed. This provides basis to seepape control design.