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

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (24) : 179-186.

MENG Qingjuan1,2,QIAO Jingsheng1,2

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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.

Key words

periodic pile barriers / saturated soil / attenuation zone(AZ) / vibration isolation / body wave

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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

References

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