摘要
目前越来越多的承台采用管桩支撑,然而管桩在打入土层中会形成土塞,土塞对管桩的竖向振动特性影响不可忽略。通过建立考虑土塞效应的管桩振动模型,推导出其竖向振动阻抗函数,并验证该解的合理性。然后讨论了管桩材料、长径比、泊松比、阻尼比以及桩土相对刚度5个因素对单桩阻抗的影响。结果表明:这5个因素对管桩的竖向动力特性均有很大的影响,为工程实践提供了一定的依据。
At present , more and more pile caps use pipe pile to support ,but the pipe pile will form a soil plug when driving into the soil layer .The effect of soil plug on vertical vibration feature of pipe pile can't be ignored.Through establishing pile vibration model considering soil plugging effect ,the paper deduced the impedance function of vertical vibration and verified the rationality of solution .Then it discussed the effect of five factors such as pile material , slenderness , Poisson ratio , damping ratio and pile-soil relative stiffness on single pile impedance .The result shows that the five factors have a great influence on vertical dynamic characteristics of pipe pile , the result can provide some basis for engineering practice .
出处
《水资源与水工程学报》
2015年第6期212-219,共8页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金青年基金项目(51008194)
关键词
端承桩
竖向振动特性
传递矩阵法
土塞效应
end-bearing pile
vertical vibration feature
transfer matrix method
soil plugg effect
