| 三一旋挖钻机工法讲座(8)——扩底灌注桩的旋挖钻机成孔工法 |
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| 引用本文： | 王磊,高春华,卢英明.三一旋挖钻机工法讲座(8)——扩底灌注桩的旋挖钻机成孔工法[J].建筑机械,2011(15). |
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| 作者姓名： | 王磊 高春华 卢英明 |
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| 作者单位： | 三一工法研究院; |
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| 摘 要： | 钻孔扩底灌注桩是在普通灌注桩基础上发展起来的一种新桩型,钻孔扩底灌注桩工法是把按等直径钻孔方法形成的桩孔钻进到预定的深度后,换上扩孔钻头,撑开钻头的扩孔刀刃使之旋转切削地层以形成扩大孔底,待成孔后放入钢筋笼,灌注混凝土形成扩底桩以获得较大承载能力的施工方法。
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| 关 键 词： | 三一工法 旋挖钻机 扩底灌注桩 |
Drilled working method of enlarging base and casting stake by rotary drilling rig |
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| Abstract: | Enlarging base and casting stake is a new type which developed on the basis of common casting stake.The working method of enlarging base and casting stake is replacing the reaming bit after drill to a predetermined depth by equal diameter drilling pile hole,open bit reaming blade and rotate cutting to form the enlarged bottom hole,then put steel cage,and finally affuse concrete in rder to obtain a larger carrying capacity. |
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