Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (4): 1219-1226.doi: 10.16285/j.rsm.2019.0720

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Treatment effect of reagent injection mixing ratio on soft clay improved by chemical electroosmosis method

REN Lian-wei1, CAO Hui1, KONG Gang-qiang2   

  1. 1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China; 2. Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China
  • Received:2019-04-21 Revised:2019-06-26 Online:2020-04-11 Published:2020-07-01
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51478165, U1810203).

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Abstract: Chemical electroosmosis method is one of the fast and effective methods for soft ground treatment, which is widely accepted by engineers. In order to study the effect of reagent injection mixing ratio on chemical electroosmosis treatment of soft clay, model tests on electroosmotic were carried out, and the CaCl2 and Na2SiO3 solutions were combined to study the injection effect. The electroosmotic drainage effect was obtained when the ratio of the concentration of the substances was 1:1, 1:2, 1:3, 2:1 and 3:1 respectively. The displacement, drainage rate and drainage microscopic characteristics of each working condition after the test (ICP-MS), energy consumption, drainage effect, reinforcement effects, and uniformity were also discussed. The results show that when the concentration ratio of CaCl2 solution and Na2SiO3 solution was 1:1, the chemical electroosmosis effect is the best, the anodic corrosion amount is the least, and the energy consumption is the lowest. The electroosmotic effect is mainly influenced by the reagent injection ratio, specifically, by the type and quantity of cations added to the reagent, and the effect of Ca2+ on chemical electroosmosis is relatively prominent.

Key words: soft clay, chemical electroosmosis method, reagent injection mixing ratio, treatment effect

CLC Number: 

  • TU 472
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