Effects of dynamic load direction of strong tamping on stability of loess slope

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (1) : 283-289.

WU Bingquan1,2, NI Wankui1,2, TUO Wenxin1,2, REN Siyuan1,2, CHEN Junting1,2

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Abstract

In order to further study the influence of dynamic compaction on the stability of surrounding loess slope, the limit equilibrium arc strip division method was used to deduce and calculate the slope safety factor under dynamic compaction.Combined with the engineering example, TC-4850 blasting vibration meter was used to test the acceleration of the site monitoring points.Considering the common influence of elevation difference and measuring point distance, the matlab programming was used for multiple regression analysis of the field data.The analytical formula of vibration acceleration of slope particles under dynamic compaction was obtained in the paper. On the basis of obtaining the minimum safety factor, the influence of different directions of strong rammed load on the stability of loess slope was studied.The results showed that under the same load, when the angle between the direction of strong rammed load and the positive direction of the horizontal axis is 0o、45o、60o、270o、315o、330o、and 360o , the safety factor is less than or equal to 1. With the increasing of the pseudo-static coefficient, the safety factor becomes smaller and smaller. When the angle between the direction of strong rammed load and the positive direction of the horizontal axis is 90o、135o、150o、180o、225o and 240o , the safety factor is greater than 1.05. With the increasing of the pseudo-static coefficient, the safety factor also increases. The method is simple and easy to calculate. It’s can be directly used in practical engineering. This method can be applied to the practical engineering of loess slope.

Key words

Limit equilibrium;Dynamic load direction of strong ramming / Factor of safety / Quasi-static coefficient;

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WU Bingquan1,2, NI Wankui1,2, TUO Wenxin1,2, REN Siyuan1,2, CHEN Junting1,2. Effects of dynamic load direction of strong tamping on stability of loess slope[J]. Journal of Vibration and Shock, 2024, 43(1): 283-289

References

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