基于应变路径法的黏土中水平受荷桩<em>p</em>-<em>y</em>曲线

黄茂松; 俞剑; 张陈蓉

doi:10.11779/CJGE201503002

基于应变路径法的黏土中水平受荷桩p-y曲线 English Version

黄茂松^{1, 2},
俞剑^{1, 2},
张陈蓉^{1, 2}

1. 同济大学地下建筑与工程系,上海 200092; 2. 同济大学岩土及地下工程教育部重点实验室,上海 200092

基金项目: 国家973计划课题（2013CB036304）; 国家自然科学基金项目（51378392）; 教育部博士点基金项目（20110072110008）

详细信息

作者简介:
黄茂松(1965- ),男,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。E-mail: mshuang@tongji.edu.cn。

中图分类号: TU44
计量
- 文章访问数: 0338
- HTML全文浏览量: 0
- PDF下载量: 0407
出版历程
- 收稿日期: 2014-07-13
- 发布日期: 2015-03-23

p-y curves of laterally loaded piles in clay based on strain path approach

HUANG Mao-song^{1, 2},
YU Jian^{1, 2},
ZHANG Chen-rong^{1, 2}

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 水平桩的p-y曲线大多是基于试验数据（API规范,双曲线）,旨在从理论出发推导桩侧土体的p-y曲线。首先,推导了与上限解等价的分步弹性加载理论,并结合刚性圆盘在环状弹性介质中受水平力作用下的弹性力学解以研究桩身水平位移和桩周平均剪应变间的关系;再应用该平均剪应变和土体的双曲线应力应变关系建立联系以得到桩周土体在加载过程中的平均屈服应力即已发挥的土体强度;以此确立二维情况下桩身位移和桩周土反力的关系即p-y骨干曲线。再进一步根据三维的桩侧初始地基模量和桩侧极限承载力,将其推广至三维。该p-y曲线的优点在于可以考虑土体应力应变关系、桩身刚度和长细比对p-y曲线的影响。最后,将本文p-y曲线和传统p-y曲线分别与工程实例以及有限元结果进行对比,并指出传统p-y曲线的不足及恰当的使用范围。
- 水平受荷桩 /
- 软黏土 /
- p-y曲线 /
- 应力应变关系 /
- 应变路径法
Abstract: p-y curves of lateral reaction of piles can be found in the literatures, most of which are based on experimental data (such as API, hyperbolic curve) and few on analytical solutions. A load transfer function derived from the theoretical analysis is presented. First, a subsection elastic loading theory equivalent to the upper bound analysis is derived. Based on this method, a plane-strain solution for a circular section pile in a ringed circular elastic medium is given to study the relation between horizontal displacements and an average plastic strain of the soils around a pile in undrained behavior. This average strain will employ the stress-strain behavior of the soils as established from the triaxial tests so that a new two-dimensional p-y curve is developed. Then, the initial soil-pile interaction stiffness and the ultimate unit resistance are presented considering the three-dimensional effect, and it can be extended to analyze the three-dimensional lateral reaction of piles. The advantage of the p-y curve is that it is capable of taking into account the effect of change in soils and pile properties on the resulting p-y curves. Finally, a specific numerical application of the results is made, and the solutions from this p-y curve and other conventional methods are verified by comparing with the data from field tests and finite element methods, clearly stating the deficiency and the corresponding ranges of application.
- laterally loaded pile /
- soft clay /
- p-y curve /
- stress-strain relationship /
- strain path approach

HTML全文

参考文献(21)

[1]	POULOS H G, DAVIS E H. Pile foundation analysis and design[M]. New York: John Wiley and Sons, 1980.
[2]	RANDOLPH M F. The response of flexible piles to lateral loading[J]. Géotechnique, 1981, 31(2): 247-259.
[3]	BANERJEE P K, DAVIS T G. The behavior of axially and laterally loaded single piles embedded in non-homogeneous soil[J]. Géotechnique, 1978, 28(3): 309-326.
[4]	GEORGIADIS M, ANAGNOSTOPOULOS C, SAFLEKOU S. Cyclic lateral loading of piles in soft clay[J]. Geotechnical Engineering, 1992, 23(1): 47-60.
[5]	MATLOCK H S. Correlations for design of laterally loaded piles in soft clay[C]// Proceedings Second Annual Offshore Technology Conference. Houston, 1970: 1204.
[6]	AMERICAN PETROLEUM INSTITUTE. Recommended practice for planning, designing and constructing fixed offshore platforms[M]. Washington D C: American Petroleum Institute Production Department, 1987.
[7]	KLAR A. Upper bound for cylinder movement using “Elastic” fields and its possible application to pile deformation analysis[J]. International Journal of Geomechanics, ASCE, 2008, 8(2): 162-167.
[8]	ASHOUR M, NORRIS G. Modeling lateral soil-pile response based on soil-pile interaction[J]. Journal of Geotechnical and Geoenvironment Engineering, ASCE, 2000, 126(5): 420-428.
[9]	SHIELD R T, DRUCKER D C. The application of limit analysis to punch indentation problems[J]. Journal of applied mechanics, ASME, 1953, 20(4): 453-460.
[10]	RANDOLPH M F, HOULSBY G T. The limiting pressure on a circular pile loaded laterally in cohesive soil[J]. Géotechnique, 1984, 34(4): 613-623.
[11]	MARTIN C M, RANDOLPH M F. Upper bound analysis of lateral pile capacity in cohesive soil[J]. Géotechnique, 2006, 56(2): 141-145.
[12]	OSMAN A S, BOLTON M D. Simple plasticity-based prediction of the undrained settlement of shallow circular foundations on clay[J]. Géotechnique, 2005, 55(6): 435-447.
[13]	SLOAN S W. Upper bound limit analysis using finite elements and linear programming[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1989, 13(3): 263-282.
[14]	BAGUELIN M F, FRANK R, SAID Y H. Theoretical study of lateral reaction mechanism of piles[J]. Géotechnique, 1977, 27(3): 405-434.
[15]	NOGAMI T, OTANI J, KONAGAI K, et al. Nonlinear soil-pile interaction model for dynamic lateral motion[J]. Journal of Geotechnical Engineering, ASCE, 1992, 118(1): 89-106.
[16]	BARNSBY M F. Selection of p - y curves for the design of single laterally loaded piles[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1999, 23(15): 1909-1926.
[17]	VESIC A B. Bending of beam resting on isotropic elastic solid[J]. Journal of the Engineering Mechanics Division, ASCE, 1961, 87(2): 35-53.
[18]	FAN C C, LONG J H. Assessment of existing methods for predicting soil response of laterally loaded piles in sand[J]. Computers and Geotechnics, 2005, 32(4): 274-289.
[19]	SKEMPTON A W. The bearing capacity of clays[C]// Proceeding of Building Research Congress, Division I. London, 1951: 180-189.
[20]	KIM Y, JEONG S, LEE S. Wedge failure analysis of soil resistance on laterally loaded piles in clay[J]. Journal of Geotechnical and Geoenvironment Engineering, ASCE, 2011, 137(7): 678-693.
[21]	GABR M A, LUNNE T, POWELL J J. P - y analysis of laterally loaded piles in clay using DMT[J]. Journal of Geotechnical Engineering 1994, 120(5): 816-837.

施引文献

资源附件(0)

计量

文章访问数:
HTML全文浏览量: 0
PDF下载量:
被引次数: 0

基于应变路径法的黏土中水平受荷桩p-y曲线 English Version

作者简介: 黄茂松(1965- ),男,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。E-mail: mshuang@tongji.edu.cn。

计量

出版历程

p-y curves of laterally loaded piles in clay based on strain path approach

计量

出版历程

目录

作者简介:
黄茂松(1965- ),男,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。E-mail: mshuang@tongji.edu.cn。