基于荷载传递法的嵌岩桩负摩阻力计算研究

贺成斌; 赵明华; 雷勇

doi:10.6052/j.issn.1000-4750.2013.05.0441

基于荷载传递法的嵌岩桩负摩阻力计算研究

贺成斌^{1, 2},
赵明华^1,,
雷勇²

1.
湖南大学岩土工程研究所,湖南,长沙 410082;
2.
湖南科技大学土木工程学院,湖南,湘潭 411201

基金项目: 国家自然科学基金项目(51208195); 湖南省教育厅项目(10C0669)

详细信息

作者简介:
贺成斌(1974―),男,四川安岳人,讲师,博士,主要从事桩基础及特殊土地基处理研究(E-mail:chengbinhe@163.com);雷勇(1983―),男,湖南常德人,讲师,博士,主要从事桩基础设计及工程应用研究(E-mail:leiyonghnu@163.com).

通讯作者:
赵明华(1956―),男,湖南洞口人,教授,博士,党委书记,中国岩石力学与工程学会理事,主要从事桩基础及特殊土地基处理方面的教学与研究(E-mailmhzhaohd@21cn.com).

中图分类号: TU473.11
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- 文章访问数: 361
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出版历程
- 收稿日期: 2013-05-15
- 修回日期: 2014-01-08
- 刊出日期: 2014-11-24

NEGATIVE FRICTION COMPUTATIONAL RESEARCH OF ROCK-SOCKETED PILE BASED ON LOAD TRANSFER METHOD

1.
Geotechnical Engineering Institute, Hunan University, Changsha 410082, China;
2.
College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China

摘要

摘要: 结合有效应力法及荷载传递法建立了嵌岩桩负摩阻力计算的分段模型。通过位移控制方程计算得到了桩身不同段位移及轴力的解析解及幂级数解,进一步得到了计算桩身轴力及负摩阻力中性点位置的迭代计算方法。在一工程实例分析时,采用线性拟合的方法准确拟合桩周土体沉降,所得的桩身轴力沿桩长范围内的变化曲线与实测曲线较为吻合,该法能较准确地描述桩身负摩阻力的传递过程及其沿桩身的分布。
- 嵌岩桩 /
- 负摩阻力 /
- 有效应力 /
- 荷载传递法 /
- 幂级数解
Abstract: The negative friction piecewise calculation model of a rock-socketed pile was established by the effective stress method, combining with the load transfer method. Then the analytical solution and the power series solution of pile body displacements and axial forces were obtained by a displacement control equation. Furthermore, the iterative calculation method used to calculate the pile shaft axial forces and the neutral position of negative skin friction resistance was proposed. Through the analysis of an engineering example and using linear fitting method to accurately describe the soil subsidence, the change curve of pile axial-forces along the pile within the scope is identical with a measured curve. The method can accurately describe the negative friction transmission process and its distribution along a pile.
- rock-socketed pile /
- negative friction resistance /
- effective stress /
- the load transfer method /
- power series solution

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参考文献(12)

[1]	桩身负摩阻力的现场测试与研究[J]. 岩土力学, 1997, 18(1): 8―15. Ma Shidong. Study on negative skin friction along pile shaft with field test [J]. Rock and Soil Mechanics, 1997, 18(1): 8―15. (in Chinese)
[2]	冷伍明, 王永和. 软土地区桥台桩基负摩阻力试验研究[J]. 岩土工程学报, 2005, 27(6): 642―645. Lü Wentian, Leng Wuming, Wang Yonghe. In-situ tests on negative friction resistance of abutment piles in soft soil [J]. Chinese Journal of Geotechnical Engineering, 2005, 27(6): 642―645. (in Chinese)
[3]	I J, Bjerrum L. Measurements of the compression of a steel pile to rock due to settlement of the surrounding clay [C]. Proceedings of the Sixth International Conference on Soil Mechanics and Foundation Engineering, Montreal, 1965: 261―264.
[4]	94-2008, 建筑桩基技术规范[S]. 北京: 中国建筑工业出版社, 2008. JGJ 94-2008, Technical code for building pile foundations [S]. Beijing: China Building Industry Press, 2008. (in Chinese)
[5]	雷勇, 刘晓明. 基于剪切位移法的基桩负摩阻力计算[J]. 湖南大学学报(自然科学版), 2008, 35(7): 1―6. Zhao Minghua, Lei Yong, Liu Xiaoming. Settlement calculation of the single pile’s negative skin friction with shear displacement method [J]. Journal of Hunan University (Natural Sciences), 2008, 35(7): 1―6. (in Chinese)
[6]	贺炜, 曹文贵. 基桩负摩阻力计算方法初探[J]. 岩土力学, 2004, 25(9): 1442―1146. Zhao Minghua, He Wei, Cao Wengui. Study on calculation of negative skin friction resistance on piles [J]. Rock and Soil Mechanics, 2004, 25(9): 1442―1446. (in Chinese)
[7]	周万欢, 曹卫平, 等. 改进的桩土界面荷载传递双曲线模型及其在单桩负摩阻力时间效应研究中的应用[J]. 岩土工程学报, 2007, 29(6): 824―830. Chen Renpeng, Zhou Wanhuan, Cao Weiping, et al. Improved hyperbolic model of load-transfer for pile soil interface and its application in study of negative friction of single piles considering time effect [J]. Chinese Journal of Geotechnical Engineering, 2007, 29(6): 824―830. (in Chinese)
[8]	R P, Zhou W H, Chen Y M. Influences of soil consolidation and pile load on the development of negative skin friction of a pile [J]. Computers and Geotechnics, 2009, 36(8): 1265―1271.
[9]	雷勇. 基于分形理论的人工挖孔嵌岩桩承载特性分析[J]. 工程力学, 2012, 29(12): 127―133. Zhao Minghua, Lei Yong. Analysis of bearing capacity characteristic of rock socketed piles based on fractal theory [J]. Engineering Mechanics, 2012, 29(12): 127―133. (in Chinese)
[10]	刘齐建, 曹喜仁, 等. 按桩顶沉降量控制超长灌注桩竖向承载力研究[J]. 工程力学, 2006, 23(2): 92―96. Zhao Minghua, Liu Qijian, Cao Xiren, et al. Evaluation of vertical bearing capacity of super-long bored single pile by the pile head settlement [J]. Engineering Mechanics, 2006, 23(2): 92―96. (in Chinese)
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文章访问数: 361
HTML全文浏览量: 38
PDF下载量: 66
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基于荷载传递法的嵌岩桩负摩阻力计算研究

作者简介: 贺成斌(1974―),男,四川安岳人,讲师,博士,主要从事桩基础及特殊土地基处理研究(E-mail:chengbinhe@163.com);雷勇(1983―),男,湖南常德人,讲师,博士,主要从事桩基础设计及工程应用研究(E-mail:leiyonghnu@163.com).

通讯作者: 赵明华(1956―),男,湖南洞口人,教授,博士,党委书记,中国岩石力学与工程学会理事,主要从事桩基础及特殊土地基处理方面的教学与研究(E-mailmhzhaohd@21cn.com).

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出版历程

NEGATIVE FRICTION COMPUTATIONAL RESEARCH OF ROCK-SOCKETED PILE BASED ON LOAD TRANSFER METHOD

计量

出版历程

目录

作者简介:
贺成斌(1974―),男,四川安岳人,讲师,博士,主要从事桩基础及特殊土地基处理研究(E-mail:chengbinhe@163.com);雷勇(1983―),男,湖南常德人,讲师,博士,主要从事桩基础设计及工程应用研究(E-mail:leiyonghnu@163.com).

通讯作者:
赵明华(1956―),男,湖南洞口人,教授,博士,党委书记,中国岩石力学与工程学会理事,主要从事桩基础及特殊土地基处理方面的教学与研究(E-mailmhzhaohd@21cn.com).