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为甚么大堤要进行钻探:钻探与锥探不同,锥探是为了探摸堤身内部的隐患及洞穴,以便翻筑填实;钻探大堤是为了探寻旧龙门口及渗透严重的堤身土质。因为黄
Why the embankment to be drilled: Drilling and cone exploration is different, cone exploration is to explore the hidden dangers and caves inside the dike in order to fill the building; drilling the embankment is to explore the old gate and infiltration of the embankment soil quality. Because yellow