Volume 39 Issue 3
Jun.  2025
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2025  >  39(3): 431-436
Li Kai, Jia Rui, Zhang Zuohe, Wang Xuesong, Wang Yuzhuo, Lin Hongyan, Wu Juan. Microstructure and permeability anisotropy of soft clay during one-dimensional compression[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(3): 431-436. doi: 10.20265/j.cnki.issn.1007-2993.2024-0134
Citation: Li Kai, Jia Rui, Zhang Zuohe, Wang Xuesong, Wang Yuzhuo, Lin Hongyan, Wu Juan. Microstructure and permeability anisotropy of soft clay during one-dimensional compression[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(3): 431-436. doi: 10.20265/j.cnki.issn.1007-2993.2024-0134
shu

Microstructure and permeability anisotropy of soft clay during one-dimensional compression

doi: 10.20265/j.cnki.issn.1007-2993.2024-0134
  • 1.

    Agriculture and Hydraulic Engineering College, Suihua University, Suihua 152061, Heilongjiang, China

  • 2.

    Civil Engineering College, Tianjin University, Tianjin 300072, China

  • 3.

    School Office, Suihua University, Suihua 152061, Heilongjiang, China

  • Received Date: 2024-03-29
  • Accepted Date: 2025-01-02
  • Rev Recd Date: 2024-07-26
  • Publish Date: 2025-06-09
    Abstract
  • To study the directional evolution law of soft clay microstructure and its correlation with the anisotropy of permeability coefficient, soft soil samples from the Binhai New Area in Tianjin were selected as the research object. The permeability coefficient anisotropy of Tianjin soft soil was studied through permeability tests, and the directionality of the microstructure of Tianjin soft soil before and after consolidation was qualitatively and quantitatively analyzed using scanning electron microscopy (SEM) and Image-Pro Plus (IPP) microscopy image processing technology. The research results show that there is a certain degree of directionality in the pores of the original Tianjin soft soil, but it is not obvious. The directionality of the pores increases with the increase of consolidation pressure; the anisotropy rate is linear with the increase of consolidation pressure. The increasing trend slows down after 200 kPa. Therefore, the permeability anisotropy has a certain correlation with the microstructural anisotropy, but when the consolidation pressure increases, the correlation weakens.

     

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