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一般施工现场对回填土、灰土的夯实,通常采用压路机、蛙式打夯机压实,其压实程度用干容重值表示。干容重试验多半采用环刀法。施工现场回填土、灰土与其它工业生产相比,施工工艺稳定性差得多,因此干容重测定值有较大的波动,但也存在一定的规律性。通过大量的测定数据,其波动规律近似概率分布中的正态分布,因此可以运用统计检验法控制施工质量。
The compaction of backfill and lime soil in the general construction site is usually carried out using a roller compactor and a frog type ramming machine. The degree of compaction is represented by dry bulk density. The dry weight test mostly uses the ring knife method. Compared with other industrial productions, backfilling soil and lime soil at the construction site have much poorer stability of the construction process, so the dry bulk density measured value has large fluctuations, but there are also certain regularities. Through a large number of measurement data, the fluctuation law approximates the normal distribution in the probability distribution, so the statistical test method can be used to control the construction quality.