| 大直径扩底桩的扩底稳定分析 |
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| 引用本文： | 卞肃江,钱钢.大直径扩底桩的扩底稳定分析[J].矿业快报,2004,20(8):17-20. |
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| 作者姓名： | 卞肃江 钱钢 |
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| 作者单位： | 马钢集团设计研究院 |
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| 摘 要： | 结合典型工程实例，总结和分析了大直径扩底桩在砂层中的扩底稳定问题。分析表明：目前以扩孔角或桩径扩大比作为扩底控制指标是不合适的。根据土柱下沉理论和土拱原理，提出了新的扩底控制指标，通过与实际工程的对比，证明是合理的。
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| 关 键 词： | 大直径桩（墩） 扩底控制指标 桩径扩大比 扩孔斜率 压力拱 岩柱下沉 扩径 扩高 |
| 文章编号： | 1009-5683(2004)08-0017-04 |
| 修稿时间： | 2004年6月7日 |
Analysis of Stability of Base Expansion of Large Diameter Expanded-Base Piles |
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| Bian Sujiang,Qian Gang.Analysis of Stability of Base Expansion of Large Diameter Expanded-Base Piles[J].Express Information of Mining Industry,2004,20(8):17-20. |
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| Authors: | Bian Sujiang Qian Gang |
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| Abstract: | Based on typical engineering examples,the stability problem of base expansion of large diameter expanded-base piles in sand layer is summarized and analyzed.The analysis shows that it is not suitable to use reaming angle or expansion ratio of pile diameter as control index of base expansion currently.In the light of the sinking theory of earth pillar and earth arch,the new control indexes of base expansion are put forward.It proves to be correct by comparison with practical engineerings. |
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| Keywords: | Large diameter pile(mound) Control index of base expansion Expansion ratio of pile diameter Reaming slope Pressure arch Sinking of rock pile Increase of diameter Increase of height |
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