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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。
In order to investigate the effect of main parameters of pile and soil on the horizontal vibration of pipe pile in saturated soil, the soil body is divided into two parts: saturated soil around pile and saturated core soil. Saturated soil-pipe Pile coupled vibration model. Taking into account the boundary conditions of saturated soil around the pile and the saturated condition of pile core, the horizontal vibration of the saturated soil around the pile and saturated soil of the pile core is solved by the method of potential function decoupling. The horizontal vibrations of pipe pile in saturated soil are solved under the condition of considering the effect of pile saturated soil and core saturated soil on pipe pile. The horizontal dynamic impedance of pipe pile top is obtained. The main pile, soil parameter Influence on the Horizontal Dynamic Impedance of Pipe Piles. The results show that the internal-external radius of the pipe pile, the ratio of the shear modulus and the Poisson’s ratio of the soil around the pile and the pile core have a great influence on the horizontal dynamic impedance of the pipe pile, and the liquid-solid coupling ratio Impedance has a certain impact, while the ratio of damping ratio has a certain impact on the horizontal dynamic impedance damping factor of pipe pile.