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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。
Based on the pile foundation simulation test, an exponential load transfer model of pile body is proposed. Only two parameters are required for the exponential model, and the physical meaning is clear. The index model is introduced. Based on the assumption that the pile-end load-displacement relationship is hyperbolic, a differential equation of pile-soil interaction is deduced. After solving the equation, an analytical solution is obtained for the relationship between pile load and settlement. Then the load-displacement curve of pile top can be obtained, which can be used to determine the bearing capacity of pile. Comparison between the measured results of the project and the results of the analytical solution in this paper shows that they are in good agreement.