饱和土中周期性排桩隔离体波的性能研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 179-186.

论文

饱和土中周期性排桩隔离体波的性能研究

孟庆娟1,2,乔京生1,2

作者信息 +

Vibration isolation of body waves by periodic pile barriers in saturated soil

MENG Qingjuan1,2,QIAO Jingsheng1,2

Author information +

文章历史 +

摘要

基于周期理论和Biot波动理论，研究饱和土中周期性排桩的隔振性能。应用COMSOL PDE有限元法计算理想周期性排桩的衰减域，并分析影响衰减域的主要因素；建立二维和三维有限周期排桩模型，分析排桩后饱和土中的频域响应，验证振动衰减区域的存在，并讨论排桩排数、桩长等对隔振效果的影响。研究结果表明，饱和土中理想周期排桩存在衰减域，衰减域范围内的波在二维和三维有限周期排桩中得到了有效衰减，说明了在饱和土中，应用周期排桩衰减域隔离环境振动的可行性。

Abstract

In the present work, the vibration isolation of body waves by periodic pile barriers in saturated soil was studied, based on the periodic theory and the Biot’s wave theory.The attenuation zones (AZs) of ideal periodic pile barriers were calculated and the main influence factors on the attenuation zone (AZ) were discussed by the aid of the COMSOL PDE finite element method.Two dimensional (2D) and three dimensional (3D) models of the finite rows of periodic pile barriers were built, and the frequency domain responses of the saturated soil behind the pile barriers were analyzed to verify the AZ.Then the influences of the number of rows of pile barriers and the length of piles on the vibration isolation were discussed.Results indicate that there are AZs in the ideal periodic pile-saturated soil structure.The wave located in the AZs is effectively attenuated by the 2D and 3D finite rows of periodic pile barriers, which indicate that it is feasible to mitigate the ambient vibration within the AZs by the periodic pile barriers in saturated soil.

导出引用

孟庆娟1,2,乔京生1,2. 饱和土中周期性排桩隔离体波的性能研究[J]. 振动与冲击, 2020, 39(24): 179-186

MENG Qingjuan1,2,QIAO Jingsheng1,2. Vibration isolation of body waves by periodic pile barriers in saturated soil[J]. Journal of Vibration and Shock, 2020, 39(24): 179-186

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