灰坝原指贮灰场的挡灰坝。近年来分期加高的灰坝逐渐增多，故灰坝的含义中尚有利用沉积灰体作为挡灰坝的一部分坝体之意。即在沉积的灰面上加筑子坝，甚至利用粉煤灰本身堆筑成为子坝。这便是近年来大型火电厂贮灰场的发展趋向。
微水电厂贮灰坝的施工采用了多级粉煤灰子坝技术。
The construction of ash dam in Weishui Power Plant adopts the multi stage pulverized coal ash subdam technology.
在此基础上，在不同工况条件下对灰坝进行了抗液化安全评价及抗震稳定性分析。
Based on this, the evaluations of anti liquefaction and earthquake have been made for the dam in different conditions.
为检测子级灰坝的碾压质量，运用一种轻便动力贯入仪对粉煤灰进行了一系列现场试验。
A series of tests with the portable dynamic penetrometer of type PANDA have been carried out, to inspect the grinding quality of the secondary ash dam.
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