嵌岩桩桩-土-岩共同作用的非线性计算方法研究

大量试桩资料表明,桩身荷载传递函数曲线多符合双曲线模型,故有必要对嵌岩桩荷载传递性状进行非线性分析。为此,引入双曲线模型,以荷载传递法为基础,提出了一种可充分考虑桩土与桩岩荷载传递性质差异的桩—土—岩共同作用计算方法。并将其用于实测试桩资料的数据分析。结果表明,基于双曲线模型的非线性桩—土—岩共同作用计算方法能准确地描述嵌岩桩荷载传递性状,且参数容易取得,是一种工程中可行的计算方法。

Nonlinear Analysis of Pile-soil-rock Interaction of Rock Socketed Pile

Test data have indicated that load transfer curves obey hyperbola, and therefore, it is neces?sary to analyze the nonlinear behavior of load transfer along the rock socketed pile shaft. With the introduction of hyperbola function, a pile-soil-rock interaction method is proposed for the nonlinear analysis, which can consider the differences in load transfer between the pile-soil and the pile-rock. An analysis on data from a test pile shows that the proposed method can accurately describe the load transfer process. In addition, the param?eter values used in the calculation can be easily obtained, suggesting the feasibility of the method for engineer?ing practice.