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A Study on Filed Application of Electro-Osmosis Soil Improvement Method with Nano-Coated Plastic Drain Baord

나노 코팅된 PDB를 이용한 동전기 지반개량 공법의 현장 적용성에 관한 연구

  • Ahn, Sangro (Road Facility Bureau, Daejon Regional Construction and Management Administration) ;
  • Ahn, Kwangkuk (School of Civil Engineering, Chungbuk National University)
  • Received : 2018.07.24
  • Accepted : 2018.09.22
  • Published : 2018.10.01

Abstract

The PBD (Plastic Board Drain) method is one of effective ground improvement methods on the soft dredging reclamation ground. This method has outstanding economic efficiency and constructability, and it is widely used for the soft ground improvement. However, the PBD method reduces permeability and drainage capacity of the ground due to the long construction period. Therefore, the nano coated Plastic drain board (PDB) was developed to solve problems. It is the non-metallic electrode and improves the weakness of the PBD method by using electric force of the electro-osmosis method. Various researches have been conducted to apply the nano coated PDB, but these researches were limited to model tests in laboratory. In this study, model and field tests were conducted to assess field applicability of the nano coated PDB. The result showed that the nano coated PDB had the better effect on the ground improvement compared to the normal PDB.

PBD(Plastic Board Drain) 공법은 준설 매립에 효과적인 지반개량을 위한 다양한 공법 중 하나이며, 시공성 및 경제성이 우수해 연약지반개량에 많이 사용되고 있다. 그러나 PBD 공법은 장시간 소요에 의한 지반 투수성 감소 및 배수능 저하를 야기시키는 문제점을 지니고 있다. 이를 개선하기 위해 개발된 나노 코팅된 Plastic Drain Board(PDB)는 비금속성 전극재로 전기삼투공법의 전기력을 이용해 PDB 공법의 단점을 개선하기 위해 개발한 재료이다. 나노 코팅된 PDB를 적용하기 위한 다양한 연구가 수행되었으나 실내실험으로 제한되었을 뿐 현장실험은 수행되지 않았다. 이에 본 연구에서는 나노 코팅된 PDB의 현장 활용성을 확인하기 위해 실내모형실험과 현장실험을 수행하였다. 그 결과 일반 PDB에 비해 나노 코팅된 PDB의 지반개량효과가 크게 나타났다.

Keywords

References

  1. Ahn, K. K., Jeong, K. S. and Lee, J. D. (2009), Characteristics on electroosmosis ground improvement using nano-geosynthetics, Journal of the Korean Geo-Environmental Society, Vol. 10, No. 4, pp. 59-63 (In Korean).
  2. Ahn, K. K., Ahn, S. R., Lee, J. D. and Kang, H. S. (2012), Effect of electrode for electroosmosis ground improvement with pH change, Proceeding of Korean Geo-Environmental Society, Korean Geo-Environmental, Vol. 2012, No. 9, pp. 198-201 (In Korean).
  3. Byeon, I. S., Kang, H. S., Sun, S. Y., Han, J. H. and Ahn, K. K. (2016), Improvement effect and electrical characteristics of soft ground with plastic electrode spacing, Journal of the Korean Geo-Environmental Society, Vol. 17, No. 1, pp. 13-19 (In Korean).
  4. Han, S. J., Kim, S. S., Kim, J. Y. and Kang, B. Y. (2007), Application of electrokinetic soil improvement method to field test construction site, Journal of the Korean Society of Civil Engineers, Vol. 27, No. 5C, pp. 331-341 (In Korean).
  5. Kang, H. S. and Ahn, K. K. (2015), Effect of electro-osmosis method on marine clay with preloading, Jouranl of the Korea Geo-Environmental Society, Vol. 16, No. 2, pp. 53-58 (In Korean).
  6. Lee, M. H., Han, J. G. and Lee, J. Y. (2007), Soft ground improvement using electrokinetic geosynthetics, Journal of the Korean Geosynthetics Society, Vol. 6, No. 3, pp. 25-30 (In Korean).
  7. Sin, D. C. (2010), Characteristics on electrokinetic ground improvement accoding to electrode types, Master's thesis, Graduate School of Chungbuk National University, pp. 1-47 (In Korean).
  8. Sin, T. J. (2011), Characteristics on electroosmosis ground improvement of marin clay, Master's thesis, Graduate School of Chungbuk National University, pp. 1-53 (In Korean).
  9. You, S. K., Hong, W. P. and Yoon, G. L. (2003), Study on consolidation behaviors of soft ground by plastic board droin using model tests, Journal of the Korean Geo-Environmental Society, Vol. 4, No. 4, pp. 17-23 (In Korean).