A. 对素土、灰土和砂垫层可用贯入仪检验垫层质量；对于素土也可用钢筋检验，并均应通过现场试验以控制压实系数所对应的贯入度为合格标准
B. 当采用贯入仪或钢筋检验垫层的质量时，检验点的间距应小于5m
C. 当取土样检验垫层的质量时，对大基坑每100～150m2应不少于1个检验点；对基槽每15~25m2应不少于1个点；每个单独柱基应不少于1个点
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