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Discrete meta-analysis of slit dam intercepted particle flow based on PFC3D

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Abstract

Landslides are a common geological hazard, and large-scale landslides can often impose a serious impact on the livelihoods of contemporary people. To study the effect of slit dams on debris flow, numerical simulations were hereby calibrated with fine parameters through physical tests, and several different sets of slit dam stopping structures were designed to study their effect on the accumulation of debris flow movement. The results showed that: (1) slit dams work effectively in reducing the velocity of particles in the x-direction, blocking 81.24% of the debris flow volume; (2) the time for the velocity of particles in the x-direction to drop to 0 m/s increases and fluctuates more with the increase of the slit dam column spacing, when the retention rate of the slit dam gradually decreases, and a clear linear relationship is found between the column spacing and the volumetric retention rate in the range of 0.02–0.06 m; (3) as the number of column rows increases, that of particles overflowing decreases gradually, and that of column rows has less influence on the changing pattern of the velocity of particle movement in the x-direction, when the volume interception rate of debris flow increases, but the increasing rate of interception rate is decreasing gradually; and (4) the staggered arrangement of slit dams has a more pronounced effect on the velocity hindrance of particle movement in the x-direction, with a blockage rate of 1.59%, which is effectively improved.

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Authors and Affiliations

  1. Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China

    Yuqiong He & Lei Tang

  2. School of Civil Engineering, Southwest Jiaotong University, Chengdu, 611756, Sichuan, China

    Rong Sun

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  1. Yuqiong He
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  2. Lei Tang
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He, Y., Tang, L. & Sun, R. Discrete meta-analysis of slit dam intercepted particle flow based on PFC3D. Comp. Part. Mech. 10, 1127–1143 (2023). https://doi.org/10.1007/s40571-022-00542-1

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