复杂水平荷载作用下部分埋入单桩的计算方法*

在Winkler地基梁模型和有限单元法理论的基础上,提出了一种在复杂水平荷载作用下求解部分埋置水平受荷单桩弯矩和位移的计算方法。将该方法计算结果与经典算例结果和现场试验结果进行对比,验证了该方法的正确性。通过算例分析了水流冲刷作用和桩顶约束条件对部分埋入桩桩身弯矩和位移的影响,分析结果表明,在研究冲刷对桩基水平承载力的影响时应结合桩顶的约束条件。该方法可有效开展复杂水平荷载下部分埋置水平受荷桩的计算分析。

Calculation method for partially embedded single pile under complex horizontal loading

Based on the Winkler footing beam model and the theory of finite element method,a calculation method to solve the displacement and bending moment of partially embedded lateral load-bearing pile under complex lateral loading was proposed.The validity of the proposed method was verified by comparing the calculation results in proposed method with the results of classic calculation example and the field experimental results.Finally,through the analysis on the calculation example,this paper analyzed the influence of the scouring action of current and the constraint conditions at the pile head on the displacement and bending moment of the partially embedded pile body.The analysis results show that the constraint conditions at the pile head should be considered when the impact of scouring on the lateral bearing capacity of pile foundation is being studied.The proposed method in this paper is effective to carry out computational analysis on partially embedded load-bearing pile under complex lateral load.