Model experimental study on the movement of spherical boulders in debris flow

LOU Canyun; WANG Fei; WANG Jiading; CHEN Xiaoqing

doi:10.16152/j.cnki.xdxbzr.2024-01-015

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Model experimental study on the movement of spherical boulders in debris flow

Engineering Geological Disasters | 更新时间：2024-01-18

- Model experimental study on the movement of spherical boulders in debris flow
- Journal of Northwest University (Natural Science Edition) Vol. 54, Issue 1, Pages: 133-144(2024)
- 作者机构：
  
  1.西北大学　地质学系/大陆动力学国家重点实验室，陕西　西安　710069
  2.中国科学院/水利部　成都山地灾害与环境研究所，四川　成都　610041
- 作者简介：
- 基金信息：
- DOI：10.16152/j.cnki.xdxbzr.2024-01-015
  CLC：
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LOU Canyun, WANG Fei, WANG Jiading, et al. Model experimental study on the movement of spherical boulders in debris flow. [J]. Journal of Northwest University (Natural Science Edition) 54(1):133-144(2024)
DOI：

LOU Canyun, WANG Fei, WANG Jiading, et al. Model experimental study on the movement of spherical boulders in debris flow. [J]. Journal of Northwest University (Natural Science Edition) 54(1):133-144(2024) DOI： 10.16152/j.cnki.xdxbzr.2024-01-015.

摘要

该研究通过室外水槽模型试验，模拟了不同直径巨石与不同密度泥石流完全固液耦合作用下的运动状态，分析了泥石流沟内巨石在泥石流中的运动模式、运动的影响因素及其在泥石流中的受力情况，并探讨了泥石流密度与巨石粒径对其运动速度的影响。研究结果表明：巨石在运动过程中可能出现滚动、跳跃与滑动等运动模式，巨石出现的运动模式同泥石流的密度以及巨石粒径有关；巨石的直径越大，运动速度越小，它在泥石流中的运动模式越简单，越倾向于发生滚动运动，在泥石流流体中的跟随性越好，速度比,n,越容易趋近于1；巨石粒径对巨石运动速度的影响大于泥石流密度对它的影响。

Abstract

This study, an outdoor flume model test, was to model the movement of different-diameter boulders under the complete fluid-solid coupling with different-density landslides, analyze the movement patterns of boulders in landslides, the factors influencing the movement of boulders, and the force condition of boulders in a landslide and also explore the effect of the debris flow density and boulder diameters on the velocity of the boulders in landslides. The study found that the movement of boulders may be rolling, leaping or sliding, which is related to their density and diameter. That is, the greater the boulder’s diameter and the smaller its velocity, the simpler its movement pattern in the landslide, it is more likely to roll, the better its following behaviour in the landslide; also, it is more likely for the speed ratio (,n,) to approach 1. The study showed that the boulder diameter affects boulder velocity more greatly than the landslide density.

关键词

泥石流球形巨石水槽试验运动规律

Keywords

debris flowspherical bouldersflume model testmovement pattern

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College of Tourism and Environment Science,Shaanxi Normal University,Xi′an

1)Department of Mathematics,Northwest University

2)Deparment of Urban and Resource Scicence, Northwest University,710069,Xi′an

西北大学数学系西北大学城市与资源学系

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