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倾斜荷载是海洋、输变线塔等桩基工程的最主要荷载形式之一。然而现行规范中有关该问题的计算方法相对并不成熟。将桩身划分为自由段和嵌固段,建立桩基单元体的挠曲微分方程;基于群桩p-y曲线法计算水平荷载下群桩承载特性;考虑桩-土相对滑移和竖向力引起的二阶弯矩(P-(35))效应,基于剪切位移法计算竖向荷载下桩-土相互作用;编制相应程序,以迭代法计算获得荷载-位移曲线、桩身弯矩分布规律曲线等。分析验证了所建立的理论计算方法的准确性和可靠性。相关研究成果拓展了工程设计中倾斜荷载作用下桩基承载特性计算方法,为工程设计与计算提供参考依据。
Tilting load is one of the most important load forms of pile foundation engineering such as marine and transmission line tower. However, the calculation of this problem in the current norms is relatively immature. The pile body is divided into the free section and the embedded section, and the deflection differential equation of the pile foundation element body is established. The pile group bearing capacity under horizontal load is calculated based on the group py curve method. Considering the relative slip and vertical force (P (35)), the pile-soil interaction under vertical load is calculated based on the shear displacement method. Corresponding programs are compiled and the load-displacement curve and the distribution law of pile bending moment are obtained by iterative method Curve and so on. The accuracy and reliability of the established theoretical calculation method are verified by analysis. Relevant research results expand the calculation method of pile foundation bearing capacity under inclined load in engineering design and provide references for engineering design and calculation.