抛物线分布荷载推力桩双参数法的2种数值解

TWO NUMERICAL SOLUTIONS OF PILES SUBJECTED TO LATERALLY PARABOLIC DISTRIBUTED LOADS WITH BIPARAMETER METHOD

为适应抛物线分布荷载推力桩的设计和计算的需要,提出和探讨地基水平抗力系数按双参数模式表达下桩身位移和内力计算的有限差分法和弹性地基杆系有限单元法。编制全桩位移、内力计算和图形处理有限差分程序。实例计算结果表明,2种数值计算方法所得结果相当一致。根据试桩实测资料试算确定地基抗力双参数后,二者即可高效而可靠地对承受抛物线分布荷载推力桩进行设计计算与分析。

In order to satisfy the requirements of design and calculation of piles subjected to laterally parabolic distributed loads,the finite difference method and the pole system finite element method of elastic foundation are presented and discussed in order to compute the displacements and internal forces by adopting biparameter method of lateral subgrade reaction.The finite difference computing and figure processing of displacements and internal forces of piles are programmed.The example shows that the calculation results obtained by the two numerical methods well coincide each other.After the two parameters of lateral subgrade reaction obtained by trial computations based on the measurements of the testing piles,the design and calculation of the piles subjected to laterally parabolic distributed loads can be conducted effectively and reliably with the two methods.The achieved results can provide some references for similar engineering design.