Foundation Isolation from Vibrations Using Piles as Barriers
Foundation Isolation from Vibrations Using Piles as Barriers
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DOI：
10.1061/(asce)0733-9399(1988)114:11(1854
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发表时间：
1988-11
期刊：
影响因子：
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通讯作者：
J. Avilés;F. Sánchez-Sesma
中科院分区：
文献类型：
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作者：
J. Avilés;F. Sánchez-Sesma
提出了一种以桩为屏障解决地基隔振问题的理论分析方法。该问题在二维和三维中被表述为弹性波的多重衍射之一。利用Graf加法定理，在土桩界面处施加连续性和平衡条件，确定了其解。对于二维模型，得到了精确解。每个桩的衍射场被构造为柱面波函数的展开。对于三维模型，得到了一个近似解。在这个近似解中，每根桩的衍射场只用瑞利波构造。通过参数分析，研究了桩径、桩间距、桩长等因素对挡土效果的影响。定义了传递率指标来衡量该隔离系统的有效性。
A theoretical analysis is presented to solve the problem of foundation isolation from vibrations generated in the neighborhood using piles as barriers. The problem is formulated in two and three dimensions as one of multiple diffractions of elastic waves. The solution is determined imposing continuity and equilibrium conditions at the soil‐pile interfaces with the aid of Graf's addition theorem. For the two‐dimensional model the exact solution is obtained. The diffracted field by each pile is constructed as expansions of cylindrical wave functions. For the three‐dimensional model an approximate solution is obtained. In this approximate solution the diffracted field by each pile is constructed only with Rayleigh waves. A parametric analysis is done to study the influence of the diameter of the piles, the separation between them, and their length on the effectiveness of the barrier. A transmissibility index is defined to measure the effectiveness of this isolation system.