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85问答库 > 人工挖孔桩必须在做完动测后才能进行抽芯吗？

人工挖孔桩必须在做完动测后才能进行抽芯吗？

2025-03-16 16:45:06

推荐回答（1个）

回答1：

低应变法动测和取芯一样都是桩身完整性检测。每种检测都有它们特点。这里我就简单说一下：动测检测时间只要达到设计强度70%就可以检测。而取芯需达到28天后。动测检测速度快，缺点是检测到缺陷其性质不好确定，取芯就很直观，但相对时间较长，缺点是“一孔之见”，但检查持力层和查沉渣厚度准确。至于先动测还是先取芯看需要。一般先动测，检测到哪些桩有缺陷是后，再决定取芯验证，这样省时省费用。这是本人见解。

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