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关于单桩竖向弹性刚度有关问题的讨论
doi: 10.13204/j.gyjz201406007
DISSCUSION OF SOME PROBLEMS ABOUT VERTICAL ELASTIC RIGIDITY OF SINGLE PILE
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摘要: GB 5004096《动力机器基础设计规范》在确定单桩竖向刚度时,采用了刚性桩的设计理论,但实际桩并非刚性体,1979年和1987年苏联颁布的《动力机器基础设计规范》均采用了桩侧刚度为常量的弹性桩设计理论,显然,苏联《动力机器基础设计规范》比GB 5004096较合理。实际桩侧刚度沿桩长呈不均匀分布,并对桩的竖向刚度有较大的影响。在将桩侧刚度设置为不均匀分布的基础上,采用有限元法对单桩的竖向刚度进行计算,并将计算结果与按苏联1987年颁布的《动力机器基础设计规范》中方法的计算结果进行对比和讨论。最后给出了在设计中可以直接采用的单桩竖向弹性刚度。Abstract: The determination of vertical rigidity of single pile in GB 5004096 Code for Design Dynamic Machine Foundation adopted the theory of rigidity pile． Actually，piles are not rigid solid． In 1979 or 1987，the determination of the rigidity adopted the theory of elastic pile under condition of constant lateral rigidity in Code for Design Dynamic Machine Foundation of CCCP． The paper adopted Finite element method to determine the rigidity under condition of variable lateral rigidity and discussed those determination methods，and put forward the rigidity values，which might be used in design．
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