防渗墙塑性混凝土原状样渗透特性试验

Study of permeability of plasticconcrete of cutoff wall

为了检验已运行６年之久的十三陵抽水蓄能电站尾水围堰防渗墙塑性混凝土设计配方的合理性及其施工质量，对塑性混凝土原状样进行了渗透及力学特性的试验研究。试验是在自行研制的塑性混凝土渗透仪上进行的。该渗透仪的试样应力状态、渗透条件简单明确，渗透断面确定。通过量测出某一时段、某一水力坡降下渗出的水量后，可计算出渗透系数。试验还提供了该塑性混凝土主要的力学指标。试验结果表明，该塑性混凝土配方设计是合理的，施工质量完全满足了设计要求。

This paper presents the laboratory test results of permeability of plastic concrete sampled from cutoff wall of the tailing cofferdam of the Thirteen tombs Pumped Storage project, aiming at examining the permeability and construction quality of the plastic concrete. The samples were tested on permeameters developed for plastic concrete, under confining pressure and constanthead permeability pressure. The results indicate that plastic concrete is a rational material for seepage control, and the quality of the construction of the cutoff wall is good.