此文以安徽省铜陵电厂三期扩建工程灰库高坝振冲碎石桩复合地基为实例，阐述了复合地基在淤泥质坝基中的抗滑作用、施工监测和实际效果。揭示了用密实电流控制的碎石用量、桩深和变形桩径之间的函数关系。指出复合地基改变了大面积淤泥质上体结构。 In this paper, an example of the high-rise dam with gravel pile combined with gravel pile in the third phase expansion project of Tongling Power Plant in Anhui Province is taken as an example to illustrate the anti-slip effect, construction monitoring and practical effect of the composite foundation in the silt dam foundation. The amount of gravel controlled by dense current, the relationship between the pile depth and the diameter of the deformed pile were revealed. It is pointed out that the composite foundation changed the large-scale silt upper body structure.