场地条件对滑坡-碎屑流运动冲击特征的影响研究

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Abstract The movement ground conditions of rock avalanches vary greatly, resulting in significant differences in the motion parameters and impact effects of the same scale of landslide. In order to quantify the mechanism of site conditions, three-dimensional discrete element simulation software was used to carry out the impact study of rock avalanches with ground conditions as variables. Slope gradient, slope of accumulation area and site geometric characteristics were taken into consideration in the numerical simulation. The results indicated that the average velocity-history curves of particles can be divided into acceleration and deceleration stages under different slope gradients. The greater the slope, the greater the average velocity and the impact force are. Because the energy consumed by sliding along the slope surface decreased. Both the peak and final value of impact force increase with the increase of the slope of the accumulation area, which has slightly effect on the average velocity of rock avalanches particles. The further the distance between the blocking structure and the slope toe is, the more the kinetic energy of the particles is consumed during the movement process. And this leads to the impact force becomes small. There is the same order between the maximum velocity and the impact force, convex>straight>concave.

Key words： rock avalanches ground conditions motion impact

Received: 15 July 2020 Published: 28 January 2022

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	Articles by authors
	ZHANG Ruixiao1
	SU Dong1
	FAN Xiaoyi2
	JIANG Yuanjun3
	WU Zexiong1

Cite this article:

ZHANG Ruixiao1,SU Dong1,FAN Xiaoyi2, et al. Influence of site conditions on the motion and impact effect of rock avalanches[J]. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(2): 229-239.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2022/V41/I2/229

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