Calcareous sand is a cause of special Marine geotechnical medium, pile foundation works are not uncommon in the calcareous sand.

钙质砂是一种海洋生物成因的特殊岩土介质，在钙质砂地基中的桩基工程又很常见。

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Prior to completion and acceptance of works, sets of data on pile foundation construction shall be prepared early and signatures of name can not be lost according to the copies of documents submitted.

在竣工验收之前，根据规定需提交的资料份数，提前整理好桩基施工的成套资料，所有必须签署姓名的地方不得遗漏。

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