泥石流最大淤积厚度影响因素
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P64.23

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四川省教育厅科研基金重点项目(18ZA0076);成都理工大学工程技术学院院级基金 (C122018022,C122019018)


Research on Influencing Factors of Maximum Deposition Thickness of Debris Flow
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    摘要:

    淤埋是泥石流对工程设施主要的危害方式之一,为研究泥石流容重、堆积坡度、粘粒矿物含量等因素对泥石流淤积厚度的影响,通过水槽堆积的试验方法研究了不同泥石流重度、不同堆积物质粘土矿物含量、不同沟道坡度的水槽淤积实验。结果表明:(1)同一容重下,随着堆积坡度的增大,淤积厚度呈现减小趋势。且在小坡度范围内,流体容重越大,淤积厚度越大,但当坡度超过一定范围后,淤积厚度与容重关系在相同坡度条件下区分不明显;(2)同一坡度下,随着泥石流体容重的增大,淤积厚度呈现增大趋势,且同一容重下,流体堆积坡度越小,淤积厚度越大,但当容重越大,淤积厚度增加速率愈大;(3)同等条件下,随着泥石流体中粘粒含量的增大,淤积厚度呈现增大趋势,另外同一粘粒含量下,流体容重越大,淤积厚度越大但随着粘粒含量越大,淤积厚度增加速率愈大。通过文献资料数据验证本文泥石流淤积厚度与影响因素的关系,具有一定的准确性和可用性。

    Abstract:

    The deposit depth of debris flow is one of the most important parameters in the evaluation and prevention of debris flow. In order to study the influence of debris flow density, accumulation gradient, clay mineral content and other factors on the deposition thickness of debris flow, the flume deposition experiments with different debris flow intensity, clay mineral content and channel slope were studied by flume deposition test.. The results show that: (1) under the same density, the deposition thickness tends to decrease with the increase of deposition gradient. In the range of small slope gradient, the larger the density of the fluid, the larger the deposition thickness, but when the slope gradient exceeds a certain range, the relationship between the deposition thickness and the density is not distinct under the condition of the same slope gradient; (2) under the same slope gradient, with the increase of the density of the debris flow, the deposition thickness shows an increasing trend, and under the same density, the smaller the slope of fluid accumulation, the larger the deposition thickness, but the larger the bulk density, the larger the rate of silting thickness increase; (3) under the same conditions, with the increase of the clay particle content in the debris fluid, in addition, the larger the density of the fluid, the larger the deposition thickness, but the larger the clay content, the faster the deposition thickness increases. It is concluded that the relationship between the deposition thickness of debris flow and the influencing factors is verified by the literature data, which has certain accuracy and usability.

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马煜,李彩侠. 泥石流最大淤积厚度影响因素[J]. 科学技术与工程, 2021, 21(23): 9733-9738.
Ma Yu, Li Caixia. Research on Influencing Factors of Maximum Deposition Thickness of Debris Flow[J]. Science Technology and Engineering,2021,21(23):9733-9738.

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历史
  • 收稿日期:2020-12-25
  • 最后修改日期:2021-06-09
  • 录用日期:2021-04-01
  • 在线发布日期: 2021-08-31
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