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市政有钢板桩打桩、送桩两个定额，那分别在什么情况下打桩和送桩？ - 工程施工 - 项目管理 - 氿上知道
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送桩：为将桩顶打至地面或水面以下,套接在桩顶上传递锤击力的长替打。就是在桩和打桩器锤头间的一段传力钢柱。
打桩：把桩打进地里，使建筑物基础坚固。