Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Characteristic of Strength Increase in Clayey Soil by Electrokinetic Injection

동전기 주입에 의한 점성토의 강도증가 특성

  • Kim, Ki-Nyun (Dept. of Civil and Environmental Engineering, Univ. of Hanyang) ;
  • Kim, Jong-Yun (Dept. of Civil and Environmental Engineering, Univ. of Hanyang) ;
  • Han, Sang-Jae (Dept. of Civil and Environmental Engineering, Univ. of Hanyang) ;
  • Kim, Soo-Sam (Dept. of Civil and Environmental Engineering, Univ. of Hanyang)
  • 김기년 (한양대학교 토목환경공학과) ;
  • 김종윤 (한양대학교 토목환경공학과) ;
  • 한상재 (한양대학교 토목환경공학과) ;
  • 김수삼 (한양대학교 토목환경공학과)
  • Published : 2005.03.25
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Abstract

In this study a series of tests(bench scale test) are carried out for increasing in strength of clayey soil by EK-Injection method. In addition, the effects of strength increase in the treated sample are measured by operating the vane shear test device during 25 days at 5 days intervals in order to estimate the effect of ground improvement caused by diffusion. The test results show that the strength increase was developed approximately double to 7 times in comparison to initial shear strength, and outstanding strength increase was created as much as 7 times while injecting the sodium silicate and phosphoric acid in anolyte and catholyte. In addition, the measured shear strength with the influence of diffusion and reduction of water-content had a tendency to converge in constant value in proportion to elapsed time. As a result of this study, strength increment developed by the influence of EK-Injection and diffusion rather than the reduction of water-content were high as 1000% on average

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