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Volume 44 Issue 4
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SONG Lin-hui, WANG Xing-ya, WU Hao-yu, ZHOU Ke-fa, MEI Guo-xiong. Permeation process of clay under different stresses[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(4): 755-761. DOI: 10.11779/CJGE202204019
Citation: SONG Lin-hui, WANG Xing-ya, WU Hao-yu, ZHOU Ke-fa, MEI Guo-xiong. Permeation process of clay under different stresses[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(4): 755-761. DOI: 10.11779/CJGE202204019
shu

Permeation process of clay under different stresses

  • 1.

    School of Physical and Mathematical Sciences, Nanjing TECH University, Nanjing 211800, China

  • 2.

    Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China

  • 3.

    College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China

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  • Received Date: June 14, 2021
  • Available Online: September 22, 2022
    Graphical Abstract
    • Abstract
  • Permeability is one of the important engineering properties of clay. It is characterized by the permeability coefficient, and its mechanism lies in the permeability process of water in clay. In order to describe the permeation process of clay, the developed rigid wall consolidation infiltration device is used to carry out clay seepage tests under 9 stress conditions. The water transfer rate and flow rate at different positions of the clay are quantitatively analyzed by the fluorescence tracing technique. The results show that the water transfer rate on the same cross section of the sample varies widely, and the distribution is very uneven. The dominant channel is easy to appear in the seepage process, and the distribution of the dominant channel is random and irregular. Under the influences of hydraulic seepage consolidation, there are also differences in permeable rate and flow rate on different cross sections. The parametric value of the soil layer near the water body is the largest and shows a decreasing trend along the seepage direction. The permeable rate and flow rate of clay both increase with the increase of hydraulic gradient and decreases with the increase of consolidation pressure, but the hydraulic gradient is more significant than consolidation pressure in terms of influence degree.
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    • References (14)
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