| 长螺旋钻孔泵压灌注CFG桩缩径与对策 |
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| 引用本文： | 贺为民,尚红,孙铭心,刘明军,常河林.长螺旋钻孔泵压灌注CFG桩缩径与对策[J].水文地质工程地质,2002,29(2):62-63,65. |
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| 作者姓名： | 贺为民 尚红 孙铭心 刘明军 常河林 |
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| 作者单位： | 中国地震局地球物理勘探中心,河南,郑州,450002 |
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| 摘 要： | CFG桩是水泥粉煤灰碎石桩的简称。长螺旋钻孔泵压灌注CFG桩在层状土层的软硬分界处及软土中出现缩径，通过降低提钻速率和设置降水井点，缩径问题有所缓解，采取复打技术后彻底解决了缩径问题。
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| 关 键 词： | CFG桩 长螺旋钻孔 缩径 复打 泵压灌注成桩工艺 软土 施工工艺 复合地基 |
| 文章编号： | 1000-3665(2002)02-0062-02 |
Reducing diameter and countermeasure of the CFG piles |
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| HE Wei-min et al..Reducing diameter and countermeasure of the CFG piles[J].Hydrogeology and Engineering Geology,2002,29(2):62-63,65. |
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| Authors: | HE Wei-min |
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| Institution: | HE Wei-min et al. |
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| Abstract: | CFG pile means Cement Flyash Grave pile. Diameter of the CFG piles with Continuous Flight Auger (CFA) and grouting becomes small in the soft soil layer and the boundary zone between soft and hard soil layers. The problem of reducing diameter has been taken a favorable turn by decreasing lifting speed of CFA and by setting up dewatering point well. The problem of reducing diameter is completely solved by repiling. |
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| Keywords: | CFG piles continuous flight Auger(CFA) reducing diameter repiling |
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