张亦静，肖宏彬

  （湖南工业大学土木工程学院，株洲 412007）

 

［摘要］在桩基模拟试验的基础上提出一种指数型桩身荷载传递模型，该指数模型所需参数只有两个，且物理意义明确。引入该指数模型，并基于桩端荷载-位移关系为双曲线的假设，推求了桩-土共同作用的微分方程，经过对方程进行求解，得到了单桩桩身荷载与沉降关系的解析解，进而得到桩顶的荷载-位移曲线，可用于确定桩的承载力。工程实测结果与本文解析解结果的对比表明，较为吻合。

［关键词］荷载传递函数；荷载-沉降关系；指数函数

中图分类号：TU473文献标识码：A文章编号：1002-848X(2012)07-0119-04

 

Zhang Yijing, Xiao Hongbin

(School of Civil Engineering, Hunan University of Technology, Zhuzhou 412007, China)

 

Abstract: An exponential load transfer model of a pile was suggested based on a model pile test. The suggested model only requires two physically meaningful parameters. Using this equation and acknowledging a hyperbolic relationship between the pile-end bearing capacity and displacement, the differential equations of soil-pile interaction were derived. Such differential equations can be solved analytically to obtain the load-settlement curve that is important in determining the bearing capacity of the pile. The theoretical results are found in a good agreement with the experimental ones.

Keywords: load transfer equation; load-settlement relation; exponential function

*国家自然科学基金资助项目“膨胀土非线性流变特性研究”（50978097），湖南省自然科学基金资助项目“膨胀土固结与流变特性研究”（08JJ3092）。

作者简介：张亦静，学士，副教授， Email：zyjww2004@163.com。

 

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