| 饱和土中管桩的水平动阻抗研究 |
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| 引用本文： | 刘林超,闫启方.饱和土中管桩的水平动阻抗研究[J].岩土力学,2014,35(5):1348-1356. |
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| 作者姓名： | 刘林超 闫启方 |
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| 作者单位： | 信阳师范学院 土木工程学院，河南 信阳 464000 |
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| 基金项目： | 河南省科技发展计划项目（No. 112300410105）；河南省科技发展计划项目（No. 122300410309）；河南省高等学校青年骨干教师资助计划项目（No. 2013GGJS-121）；信阳师范学院重大课题预研项目（No. 2013ZDYY19）；信阳师范学院青年骨干教师资助计划（No. 12007）。 |
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| 摘 要： | 为了考察桩、土主要参数对饱和土中管桩水平振动的影响,将土体分为桩周饱和土和桩芯饱和土两部分,利用多孔介质理论的饱和土控制方程建立了饱和土-管桩的耦合振动模型。在考虑桩周饱和土和桩芯饱和土边界条件的情况下,运用势函数解耦的方法对桩周饱和土和桩芯饱和土的水平振动进行了求解。在考虑桩周饱和土和桩芯饱和土对管桩作用的情况下对饱和土中管桩的水平振动进行了求解,得到了管桩桩顶的水平动力阻抗,并分析了主要桩、土参数对管桩水平动力阻抗的影响。研究表明:管桩内外半径、桩周土和桩芯土剪切模量比、泊松比之比对管桩水平动力阻抗的影响较大,低频时液-固耦合系数比对管桩水平动力阻抗有一定的影响,而阻尼比之比对管桩水平动力阻抗阻尼因子有一定的影响。
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| 关 键 词： | 饱和土 管桩 水平振动 动力阻抗 剪切模量 |
| 收稿时间： | 2013-01-14 |
Study of lateral dynamic impedance of pipe pile in saturated soil |
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| LIU Lin-chao,YAN Qi-fang.Study of lateral dynamic impedance of pipe pile in saturated soil[J].Rock and Soil Mechanics,2014,35(5):1348-1356. |
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| Authors: | LIU Lin-chao YAN Qi-fang |
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| Abstract: | In order to investigate the influence of main parameters of pile and soil on the lateral vibration of pipe pile in saturated soil, the soil is divided into saturated soil around pile and inner pile saturated soil, and coupling dynamic model of the saturated soil-pipe pile is established by using the control equations of theory of porous medium. By considering the boundaries of saturated soil around pile and inner pile saturated soil, the lateral vibrations of saturated soil around pile and inner pile core saturated soil are solved with the uncoupling method of potential function. The horizontal vibration of pipe pile in saturated soil is also solved by considering the forces of saturated soil around pile and inner pile saturated soil acting on pipe pile, and the lateral dynamic impedance of the pipe pile at pile head is obtained; the influence of main parameters on the lateral vibration of pipe pile in saturated soil is also analyzed. The research results indicate that the influence of the inner and outer radii of pipe pile, shear modulus ratio, Poisson’ ratio of pile around saturated soil and pile core saturated soil on the lateral dynamic impedance of pipe pile in saturated soil is great; fluid-solid coefficient ratio has a certain influence on lateral dynamic impedance at low frequency; and the ratio of damping ratio has a certain influence on the damping factor of lateral dynamic impedance. |
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| Keywords: | saturated soil pipe pile lateral vibration dynamic impedance shear modulus |
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