| 基于土塞松弛效应的PHC管桩承载力修正公式 |
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| 引用本文： | 戴洪军,任治军,陈念军,许崧. 基于土塞松弛效应的PHC管桩承载力修正公式[J]. 电力勘测设计, 2008, 0(1): 19-23 |
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| 作者姓名： | 戴洪军 任治军 陈念军 许崧 |
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| 作者单位： | 江苏省电力设计院,江苏,南京,210024;江苏省电力设计院,江苏,南京,210024;江苏省电力设计院,江苏,南京,210024;江苏省电力设计院,江苏,南京,210024 |
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| 摘 要： | 开口管桩在沉桩过程中由于土塞的作用,其受力机理比闭口管桩更加复杂,根据现行规范中的经验公式以及修正公式计算单桩极限承载力,开口管桩的计算值常常低于或高于载荷试验的结果。而在砂土持力层中,由于砂土在沉桩过程中受到扰动,存在松弛效应,沉桩结束后土塞高度会发生变化,根据土塞的初始高度与松弛量,对桩端阻力进行修正,所得到的承载力计算值与载荷试验结果较为吻合,通过本文的研究,建立了基于土塞松弛效应下根据静力触探指标计算管桩承载力的修正公式。
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| 关 键 词： | PHC管桩 砂土 土塞 松弛 极限承载力. |
| 文章编号： | 1671-9913(2008)01-0019-05 |
| 修稿时间： | 2007-11-27 |
The Modified Formula of Bearing Capacity of PHC Pile Based on the Effect of Soil Plug Slack |
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| DAI Hong-jun,REN Zhi-jun,CHEN Nian-jun,XU Song. The Modified Formula of Bearing Capacity of PHC Pile Based on the Effect of Soil Plug Slack[J]. Electric Power Survey & Design, 2008, 0(1): 19-23 |
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| Authors: | DAI Hong-jun REN Zhi-jun CHEN Nian-jun XU Song |
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| Affiliation: | DAI Hong-jun,REN Zhi-jun,CHEN Nian-jun,XU Song(JiangSu Province Electric Power Design Institute,Nanjing 210024,China) |
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| Abstract: | Owing to the action of the soil plug in the process of driving pile,the open-end PHC-pile possesses the more complicated mechanism of bearing.The ultimate bearing capacity of single pile is calculated according to the empirical formula and modified formula in present code,the calculated value of open-end PHC-pile is always more or less than the result of the static loading test.The sandy soil will slack due to the disturbance of driving pile,and the height of soil plug will change in resting phase.According... |
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| Keywords: | pretensioned spun high strength concrete pile sandy soil soil plug slacken ultimate capacity. |
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