冲填土又称吹填土，是由水力冲填泥砂形成的填土，它是我国沿海一带常见的人工填土之一，主要是由于整治或疏通江河航道，或因工农业生产需要填平或填高江河附近某些地段时，用高压泥浆泵将挖泥船挖出的泥砂，通过输泥管、排送到需要填高地段及泥砂堆积区，前者为有计划、有目的地填高，而后者则为无目的堆积，经沉淀排水后形成大片冲填土层。
紫山灰场粉煤灰作为一种冲填土，粒度细，似粉砂。
Pulverized coal ash is hydraulically filled on ground of Zishan. Its grains were fine as silty sand.
粘粒含量较少的轻、中粉质壤土作冲填土料修建水坠坝，在黄土高原地区已被广泛应用。
Light loam and medium loam with less clay particles as fill earth had been extensively used in the construction of hydraulic fill dam in the Loess Plateau region.
根据现行标准，大坝的抗震能力不符合要求，坝体冲填土和某些部位地基土松散，容易液化。
The dam does not meet the present day seismic safety standards. The hydraulic fills in the dam and some foundation soils are loose and susceptible to liquefaction.
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