钻孔桩坍孔后打捞冲击钻头特殊一例O~T÷ï
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钻孔桩施工中掉落钻头的事件会经常发生,但遇到的情况和处理方法不尽相同,通过对宁杭高速公路北河中河特大桥27-4#桩打捞冲击钻头的过程进行总结,介绍了一套简便易行的打捞方法。O~T÷ï
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钻孔桩O~T÷ï
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坍孔O~T÷ï
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打捞O~T÷ï
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冲击钻头O~T÷ï
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