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王运兴,周自强,白晓华,等. 泥石流堆积区粒度分布特征[J]. 科学技术与工程, 2020, 20(20): 8073-8078.
wang yun xing,et al.Study on the Characteristics of Grain-size Distribution in Debris Flow Accumulation Area[J].Science Technology and Engineering,2020,20(20):8073-8078.
泥石流堆积区粒度分布特征
Study on the Characteristics of Grain-size Distribution in Debris Flow Accumulation Area
投稿时间:2019-09-24  修订日期:2020-04-10
DOI:
中文关键词:  泥石流  堆积区  粒度  特征
英文关键词:debris flow  accumulation area  grain-size  feature
基金项目:甘肃省科学院青年科技创新基金项目(2017 QN-06);甘肃省科学院地质灾害防治与生态地质环境修复创新团队(CX201801)资助
              
作者单位
王运兴 甘肃省科学院地质自然灾害防治研究所
周自强 甘肃省科学院地质自然灾害防治研究所
白晓华 甘肃省科学院地质自然灾害防治研究所
张国信 甘肃省科学院地质自然灾害防治研究所
贾雪梅 甘肃省科学院地质自然灾害防治研究所
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中文摘要:
      为研究泥石流堆积区单期和多期粒度分布及其关系,通过现场调查和颗粒分析试验,采用统计法分析泥石流堆积区形态特征、平面和垂向粒度分布特征。结果表明:泥石流堆积区呈中间高两侧低,横轴与纵轴长度基本一致;平面上纵向从沟口到堆积扇前缘粒径逐渐增大,曲线范围峰值粒径百分含量中轴线最大,向两侧逐渐减小,中轴线粒径集中性强;平面上横向从沟口到堆积扇前缘粒径呈增大的趋势,曲线范围峰值逐渐变大,曲线范围峰值粒径百分含量逐渐增加,堆积区中部粒径集中性强;垂向上自上而下厚度逐渐增大,粒径曲线范围峰值主要为10~20 mm,具有较好的集中性。研究成果为泥石流形成机理研究和泥石流防治规划等提供参考。
英文摘要:
      To investigate the distributions and correlations of single-stage and multi-stage particles in debris flow accumulation areas, this paper utilized the approaches of onsite investigation, particle analysis, and statistical analysis, the feature of a debris flow accumulation area and its horizontal and vertical particle distributions were analyzed. The results show that: the debris flow accumulation area has a shape consisting of high center and low sides with identical lengths in the transverse and longitudinal axes; in the longitudinal direction, the grain size gradually increase from the outfall to the leading edge of the alluvial fan, the percentage of the curve range maximum grain size peaks at the central line and declines to both sides gradually, and the concentration of particle size is high in the central line; in the transverse direction, the grain size has an increased tendency from the outfall to the leading edge of the alluvial fan, the curve range maximum grain size increases, the percentage of the curve range maximum grain size grows steadily, and particle size concentration is high in the center; in the vertical direction, the layer thickness of accumulations grows from the top to the bottom gradually, the curve range peak grain size is mainly in the range of 10~20mm with a relatively high concentration. This study provides insight towards – the mechanisms of the debris-flow forming and also provides references for the prevention and control of debris flow.
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