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Volume 40 Issue 7
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REN Lian-wei, XIAO Yang, KONG Gang-qiang, ZHANG Min-xia. Laboratory tests on soft ground improvement by chemical electro-osmosis method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(7): 1247-1256. DOI: 10.11779/CJGE201807011
Citation: REN Lian-wei, XIAO Yang, KONG Gang-qiang, ZHANG Min-xia. Laboratory tests on soft ground improvement by chemical electro-osmosis method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(7): 1247-1256. DOI: 10.11779/CJGE201807011
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Laboratory tests on soft ground improvement by chemical electro-osmosis method

  • 1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
    2. Key Laboratory of Geomechanics and Embankment Engineering, Hohai University, Ministry of Education, Nanjing 210098, China

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  • Received Date: January 19, 2017
  • Published Date: July 24, 2018
    Graphical Abstract
    • Abstract
  • Based on the laboratory test method, the improvement effects of soft ground influenced by molar amount of cation, chemical action of CaCl2 and Na2SiO3 are investigated. The distributions of drainage rate, soil conductivity, energy consumption, soil water content and shear strength after different tests are analyzed comparatively. For comparative analysis, the laboratory tests on soft ground improvement by the traditional electro-osmotic method are also carried out. The test results show that the increasing molar amount of cations in soft clay is one of the most effective methods to increase the drainage amount, to improve the drainage rate and to shorten the electro-osmotic duration. The average shear strength of soil treated by the combined injection of CaCl2 and Na2SiO3 is increased by about 120%, and nearly 20% higher than that of injection of CaCl2 or Na2SiO3 lonely. The combined method of CaCl2 and Na2SiO3 has significant effect on improving the uniform distribution of water content and shear strength of soft clay after chemical electroosmotic treatment.
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