考虑端承力时泊松效应对抗拔系数的影响

张忠苗; 刘念武; 房凯

考虑端承力时泊松效应对抗拔系数的影响 English Version

浙江大学岩土工程研究所,浙江杭州 310058

详细信息

作者简介:
张忠苗 (1961 – ) ,男,浙江宁海人,博士,教授,主要从事基础工程与桩基础的研究、教学、检测工作。

中图分类号: TU473
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- 收稿日期: 2011-08-07
- 发布日期: 2011-12-06

Influence of Poisson’s effect on uplift coefficient considering tip resistance

Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 大量的试验表明,桩受到抗拔和抗压时,其侧摩阻力是不同的,即存在一个抗拔系数。对于工程中抗拔系数的计算,考虑端阻力时更加符合实际情况,以此为出发点对泊松效应下的抗拔系数进行了修正,并得出了存在桩端阻力时,桩顶荷载的抗拔和抗压计算公式,并给出了桩周土层为多层时桩顶荷载的计算思路。最后,对抗拔系数的影响因素进行了分析,得出了抗拔系数的变化规律。
- 抗拔系数 /
- 泊松效应 /
- 抗拔桩 /
- 抗压桩 /
- 侧摩阻力
Abstract: Uplift coefficient, the ratio of the friction resistance for uplift and compressive piles, has been documented widely by a number of authorities around the world. It is more appropriate and realistic to include the influence of the tip resistance in the calculation of the uplift coefficient. In this respect, the uplift coefficient associated with the Poisson’s effect is corrected, and the formulas for pile head load under tension and compression are obtained. The method to predict the pile head load for pile head in multilayered soil is also presented. In addition, the influence of several factors on the uplift coefficient is also examined to provide better insight into it.
- uplift coefficient /
- Poisson’s effect /
- uplift pile /
- compressive pile /
- residual resistance

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参考文献(8)

[1]	何思明 . 抗拔桩破坏特性及承载力研究 [J]. 岩土力学 , 2001, 22 (3): 308 – 310. (HE Si-ming. Study on bearing capacity and failure of uplift pile[J]. Rock and Soil Mechanics, 2001, 22 (3): 308 – 310. (in Chinese))
[2]	郦建俊 , 黄茂松 , 木林隆 , 等 . 分层地基中扩底桩抗拔承载力的计算方法研究 [J]. 岩土力学 , 2008, 29 (7): 1997 – 2003. (LI Jian-jun, HUANG Mao-song, MU Lin-long, et al. Research on computation methods of uplift capacity of enlarged base pile in layered soils[J]. Rock and Soil Mechanics, 2008, 29 (7): 1997 – 2003. (in Chinese))
[3]	JGJ94 — 2008 建筑桩基技术规范 [S]. 2008. (JGJ94 — 2008 Technical code for building pile foundations[S]. 2008. (in Chinese))
[4]	DENICOLA A, RANDOLPH M F. Tensile and compressive shaft capacity of piles in sand[J]. Journal of Geotechnic Engineering, 1993, 119 (12): 1952 – 1973.
[5]	孙晓立 , 杨敏 . 使用修正变形协调法分析抗拔桩非线性分析 [J]. 岩石力学与工程学报 , 2008, 27 (6): 1270 – 1277. (SUN Xiao-li, YANG Min. Analysis of nonlinear deformation of uplift piles by modified method of deformation compatibility[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27 (6): 1270 – 1277. (in Chinese))
[6]	王向军 , 吴江斌 , 黄茂松 . 桩的泊松效应对抗拔系数λ的影响 [J]. 地下空间与工程学报 , 2009, 5 ( 增刊 2): 1545 – 1548. (WANG Xiang-jun, WU Jiangb-bin, HUANG Mao-song. Influence of the poisson’s effect on the anti-uplift coefficient of uplift piles[J]. Chinese Journal of Underground Space and Engineering, 2009, 5 (S2): 1545 – 1548. (in Chinese))
[7]	ALAWNEH S A, NUSIER O K, SHARO A A. Poisson’s ratio effect on compressive and tensile shaft capacity of driven piles in sand: Theoretical formulation[J]. Computers and Geotechnics, 2007(34): 151 – 163.
[8]	FLEMING W G K, WELTMAN A J, RANDOLPH M F, et al. Piling engineering[M]. 2nd ed. Scotland: Blackie, 1992.

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考虑端承力时泊松效应对抗拔系数的影响 English Version

作者简介: 张忠苗 (1961 – ) ,男,浙江宁海人,博士,教授,主要从事基础工程与桩基础的研究、教学、检测工作。

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Influence of Poisson’s effect on uplift coefficient considering tip resistance

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出版历程

目录

作者简介:
张忠苗 (1961 – ) ,男,浙江宁海人,博士,教授,主要从事基础工程与桩基础的研究、教学、检测工作。