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简述导致滑坡险情的原因

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正确答案:

导致滑坡险情的原因有高水位持续时间长、水位骤降、堤身加高培厚时新旧土体之间结合不好、堤防本身稳定安全系数不足、堤身背水坡排水设施堵塞、外力作用(如附加荷载大)等。

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