Experimental Investigation on Propagation of Impact Load Induced Vibration in Sandy Soil

doi:10.16183/j.cnki.jsjtu.2012.01.028

Abstract

Abstract:

Model test was performed to investigate the propagation and decay of impact-load induced vibration in sandy soil, and the effect of vibration screening panel was furthermore studied. The results show that the polystyrene wave-absorbing panel placed at the boundary of test box is effective in controlling the boundary reflection of vibration waves. The impact-load induced vibration decays rapidly with the increase of distance from the load point, and the attenuation of peak acceleration along horizontal, vertical and diagonal direction can be well fitted by the function of a_max=kR^-β. Polystyrene screening panel, behind which vibration can be reduced, has the negative effect of intensifying the vibration just before it, this may be caused by the reflecting of vibration wave at the screening panel.

Key words: model test, impact load, decay of vibration, vibration screening

CLC Number:

TU435

XIANG Guo-wei, YE Guan-lin, WANG Jian-hua. Experimental Investigation on Propagation of Impact Load Induced Vibration in Sandy Soil[J]. Journal of Shanghai Jiao Tong University, 2012, 46(01): 136-141.

Figures/Tables 13

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Tab. 1

Fig. 9

Fig. 10

Fig. 11

Fig. 12

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测点	峰值时间/s	a_max/(m·s^-2)	与测点9的a_max相对值/%
9	10.465	4.3	100
10	10.473	1.6	37.2
11	10.475	1.0	23.3
12	10.482	0.6	14.0

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