A. 成孔可采用挤土法，也可采用非挤土法
B. 桩顶设计标高以上应预留一定厚度的覆盖土层
C. 当地基土含水量小于12%时，宜对处理范围内的土层进行增湿
D. 当地基土含水量大于12%时，一般可直接施工，但当含水量大于24%，饱和度大于65%时，桩孔可能缩径，桩孔周围土体易隆起，挤密效果差
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