基于指数荷载传递模型的单桩承载力特性分析

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。

Analysis on bearing capacity of single pile based on exponential load transfer model

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.