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针对超长桩的计算求解方法问题,基于最小势能原理提出了超长桩承载性状的程序计算方法。首先,对用于程序计算的侧阻及端阻计算模型进行了简要介绍;其次,推导了桩身的能量平衡方程,并由此得到桩身单元的位移、轴力计算式;再次,基于最小势能原理推导了桩身的势能增量计算式,并采用黄金分割法作为计算程序的收敛算法;最后,用工程实例对文中方法进行了验证,通过实测资料获取了实际的桩土荷载传递关系,采用折线模型和双曲线模型并存的程序计算模式,使用黄金分割法对最小势能状态进行搜索,结果表明计算值与实测数据较为符合,文中方法可为实际工程中的科研、设计工作提供参考。
Aiming at the calculation method of super-long piles, a method to calculate the bearing behavior of super-long piles is proposed based on the principle of minimum potential energy. Firstly, the calculation models of side resistance and end resistance are introduced briefly. Secondly, the energy balance equations of the pile body are deduced and the displacement and axial force formulas of the pile body are obtained. Thirdly, based on the minimum Potential energy principle is deduced to calculate the increment of potential energy of pile body, and the golden section method is used as the convergence algorithm of the calculation program. Finally, the engineering example is used to validate the method in this paper. The actual pile-soil load- The calculation model of polygons with hyperbolic model and hyperbolic model is used to search the state of minimum potential energy. The result shows that the calculated value is in good agreement with the measured data. The method in this paper can provide references for the research and design work in practical engineering.