| 小直径灌注桩旋挖成孔工艺 |
| 投稿时间：2013-11-22 修订日期：2014-03-13 点此下载全文 |
| 引用本文：郝长明.小直径灌注桩旋挖成孔工艺[J].钻探工程,2014,41(4):76-78.HAO Chang-ming. Rotary Holing Technology for Small Diameter Bored Pile[J]. Drilling Engineering, 2014,41(4):76-78. |
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| 中文摘要:由于旋挖钻机结构的特殊性，不便用于小直径钻孔灌注桩。设计了一套解决问题的新技术——小直径灌注桩旋挖成孔工法。此项新技术包含了自行设计的XFK600防扩钻头、特别的工艺参数、双护筒保浆技术等。试验研究成功后，已广泛应用于多个重大工程项目。介绍了该技术的创新内容、关键技术及其试验应用效果。 |
| 中文关键词:旋挖钻机 小直径灌注桩 钻头 长护筒 充盈系数 |
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| Rotary Holing Technology for Small Diameter Bored Pile |
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| Abstract:Because of the special structure, the rotary drilling rig is not suitable for small diameter bored piles. Aiming at this problem, a new technology of rotary holing for small diameter bored pile has been developed, which contains the self-designed XFK600 non-dilated bit, special technological parameters and mud protecting by tube with steel liner. This technology has been widely used in many large projects after successful experimental study. The paper introduces the technical innovation, key technologies and application effects. |
| keywords:rotary drilling rig small diameter bored piles bit long protecting tube filling coefficient |
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