单选题:原地基处理中,如果地基原状土强度不符合要求时,应进行换填,换填深度应大于或等于(  )cm。

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题目内容:
原地基处理中,如果地基原状土强度不符合要求时,应进行换填,换填深度应大于或等于(  )cm。 A.30
B.50
C.80
D.100
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