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针对均质饱和地基中双排桩远场被动隔振问题,首先,基于饱和多孔介质的边界元法,建立了以薄层法(TLM)基本解作为动力Green函数的饱和土半解析边界元法,该方法可有效地分析饱和半空间的土-结构动力相互作用问题。在此基础上,根据双排桩与周围土体的邻接条件,推导了双排桩对Rayleigh波散射的三维边界元方程;运用上述边界元方程,对双排桩的远场被动隔振问题进行了研究。结果表明:双排桩能够有效地降低屏障后的位移振幅,其隔振效果要优于单排桩;排间净距对隔振效果影响不大,而桩间净距则对双排桩隔振效果起控制作用。
Aiming at the far-field passive isolation of double-row piles in homogeneous saturated soil, first of all, based on the boundary element method of saturated porous media, a semi-analytic boundary element method of saturated soil based on the thin layer method (TLM) This method can effectively analyze the soil-structure dynamic interaction in saturated half-space. On this basis, according to the adjoining conditions of double-row piles and the surrounding soil, the three-dimensional boundary element equations of double-row piles for Rayleigh wave scattering are deduced. Using the above boundary element equation, the far- Study. The results show that the double-row piles can effectively reduce the displacement amplitude after the barrier, and the vibration isolation effect is better than single-row piles. The clearance between the rows has little effect on the vibration isolation effect, Vibration effect from the control effect.