吉林大学学报(地球科学版) ›› 2026, Vol. 56 ›› Issue (2): 625-634.doi: 10.13278/j.cnki.jjuese.20240040

• 地质工程与环境工程 • 上一篇    下一篇

基于图像分析的岩土颗粒介质逾渗规律

危润初1,2,3，蒋维剑1，欧阳琦1,2,3，盛丰1,2,3，谌宏伟1,2,3，黄荷1,2,3，帅焕4   

  1. 1.长沙理工大学水利与海洋工程学院，长沙410114

    2.水沙科学与水灾害防治湖南省重点实验室，长沙410114

    3.洞庭湖水环境治理与生态修复湖南省重点实验室，长沙410114

    4.湖南省水文地质环境地质调查监测所，长沙410129

  • 出版日期:2026-03-26 发布日期:2026-04-16
  • 基金资助:

    国家自然科学基金项目(41602264)；湖南省自然科学基金项目(2020JJ5572，2023JJ40021)；湖南省水利科技项目（XSKJ2023059-01）；湖南省教育厅优秀青年项目（21B0314）；湖南省地质院重大科研项目（HNGSTP202304）


Percolation Mechanism of Sand Medium Based on Image Analysis

Wei Runchu1,2,3，Jiang Weijian1 ，Ouyang Qi1,2,3，Sheng Feng1,2,3，Chen Hongwei1,2,3，Huang He1,2,3，Shuai Huan4   

  1. 1. School of Hydraulic and Ocean Engineering, Changsha University of Science and Technology, Changsha 410114, China

    2. Hunan Provincial Key Laboratory of Water and Sediment Science and Water Disaster Prevention and Control, Changsha 410114, China

    3. Hunan Provincial Key Laboratory of Water Environment Treatment and Ecological Restoration Dongting Lake, Changsha 410114, China

    4. Survey and Monitoring Institute of Hydrogeology and Environmental Geology of Hunan Province， Changsha 410129, China

     


  • Online:2026-03-26 Published:2026-04-16
  • Supported by:
    Supported by the National Natural Science Foundation of China (41602264)，the Natural Science Foundation of Hunan Province  (2020JJ5572，2023JJ40021)， the Water Conservancy Technology Project of Hunan Province （XSKJ2023059-01），the Outstanding Youth Project of Hunan Provincial Education Department  （21B0314） and the Major Scientific Research Project of Hunan Provincial Geological Institute (HNGSTP202304)

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摘要： 针对岩土颗粒介质逾渗内在机制不明晰的问题，通过调整黏粒与粗砂配比，配制岩土颗粒介质样品并测定其渗透系数，借助图像分析方法对实验样图像与随机模拟生成图像的粗砂分布形态参数开展统计，在此基础上深入剖析岩土颗粒介质逾渗规律及其内在机制。结果表明：随着粗砂质量分数的增加：粗砂连通团数量呈现出先增加后减少的变化规律，粗砂质量分数30.0%位点是连通团数量变化的转折点；最大连通团面积、平均连通团面积、粗砂分布分形维数、实验样渗透系数则均表现为单调递增；粗砂质量分数在60.0%附近时，连通团数量、最大连通团面积和平均连通团面积增长速度急降或急增，同时岩土颗粒介质的渗透系数也迅速跨越2个数量级，逾渗现象发生。岩土颗粒介质逾渗现象的发生与粗砂占比变化所引发的连通团形态变化密切相关：在粗砂质量分数低于30.0%时，粗砂颗粒呈“孤岛”状分散在黏粒中；当粗砂质量分数超过30.0%后，粗砂开始相互连通，连通团数量下降，但仍呈“块斑”状，连通性差；在粗砂质量分数达到60.0%后，粗砂相互连接为单一连通团的概率逐渐趋近于1.0，形成贯穿全渗流路径的高渗透性通道而触发逾渗。

关键词: 逾渗, 二值化图像, 渗透系数, 连通团, 分形, 孔隙介质

Abstract:

Aim to reveal the intrinsic mechanism of percolation in geotechnical granular media, geotechnical granular media samples were prepared by adjusting the ratio of clay and coarse sand, and their permeability coefficients were measured. With the help of image analysis methods, the distribution parameters of coarse sand in experimental sample images and randomly simulated images were statistically analyzed. Based on this, the percolation law and intrinsic mechanism of geotechnical granular media were analyzed. The results showed that as the mass fraction of coarse sand increased, the number of connected clusters of coarse sand showed a pattern of first increasing and then decreasing. The maximum connected cluster area, average connected cluster area, fractal dimension of coarse sand distribution, and permeability coefficient of experimental samples all showed a monotonic increase. The 30.0% mass fraction of coarse sand is the turning point of the change in the number of connected clusters. When the mass fraction of coarse sand is around 60.0%, the growth rate of the number of connected clusters, the maximum connected cluster area, and the average connected cluster area drops sharply or increases sharply. At the same time, the permeability coefficient of the soil particle media also quickly crosses two orders of magnitude, and percolation occurs. The occurrence of percolation in soil particle media is closely related to the changes in the morphology of connected clusters caused by changes in the proportion of coarse sand. When the mass fraction of coarse sand is below 30.0%, the coarse sand particles are dispersed in an “isolated island” shape in the clay particles. When the mass fraction of coarse sand exceeds 30.0%, the coarse sand begins to connect with each other, and the number of connected clusters decreases, but still appears in a “patchy” shape with poor connectivity. After the mass fraction of coarse sand reaches 60.0%, the probability of coarse sand connecting to each other as a single connected cluster approaches 1.0, and a high permeability channel that runs through the entire seepage path is formed, triggering percolation.


Key words: percolation, binarized image, permeability coefficient, connected clusters, fractal, porous medium

中图分类号: 

  • P339
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