한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제14권2호
  • /
  • Pages.936-942
  • /
  • 2013
  • /
  • 1975-4701(pISSN)
  • /
  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
권호 표지
DOI QR코드

DOI QR Code

저치환율 SCP와 GCP로 개량된 복합지반의 거동에 관한 실험적 연구

An Experimental Study on the Behavior of Composite Ground Improved by SCP and GCP with Low Replacement Ratio

  • 김병일 (명지대학교 토목환경공학과) ;
  • 유완규 (한국건설기술연구원) ;
  • 김영욱 (명지대학교 토목환경공학과) ;
  • 문인종 (명지대학교 토목환경공학과)
  • Kim, Byoung-Il (Department of Civil and Environmental Engineering, Myongji University) ;
  • Yoo, Wan-Kyu (Korea Institute of Construction Technology) ;
  • Kim, Young-Uk (Department of Civil and Environmental Engineering, Myongji University) ;
  • Moon, In-Jong (Department of Civil and Environmental Engineering, Myongji University)
  • 투고 : 2012.10.24
  • 심사 : 2013.02.06
  • 발행 : 2013.02.28
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

이 연구에서는 그동안 많은 연구가 이루어지지 않은 저치환율 SCP(sand compaction pile) 및 GCP(gravel compaction pile) 공법의 거동특성을 비교하기 위해 1g 모형시험을 수행하였다. 모형시험은 단위셀(unit cell) 개념을 적용하기 위해 단일말뚝 복합지반을 저치환율($a_s$=10%, 20%, 30%) 조건으로 조성하여 수행하였다. 모형시험결과 연약지반 개량을 위해서 SCP의 대체공법으로 GCP공법을 적용할 경우에 지반개량으로 인해서 발생하는 지지력 증가효과와 침하저감효과 및 압밀촉진효과는 SCP공법을 적용한 경우에 비해서 다소 우수한 것으로 나타났다.

This paper presents the results of laboratory tests conducted to investigate the effectiveness of applying methodology of a sand compaction(SCP) and a gravel compaction pile(GCP) on soft ground. The test conditions involved relatively low replacement ratios (=10, 20, and 30%) of a pile to unit cell at 1g (gravity acceleration) level. Results revealed that GCP significantly enhanced bearing capacity, settlement reduction, and consolidation rate compared with SCP.

키워드

참고문헌

  1. K. Kanda and Terashi, Practical Design Method of SCP on Soft Clay Deposit (Sensitivity Analysis and Fact Finding Survey), Report of Japanese Port Research Institute, No. 669, 1990[in Japanese].
  2. R. D. Barksdale, Site Improvement in Japan Using Sand Compaction Piles, Georgia Institute of Technology, Atlanta, pp.48-75, 1981.
  3. M. M. Kim, B. I. Kim, S. W. Lee and S. M. Cho, Design of Soil Improvement Method, Saeron Publication, 2004[in Korean].
  4. S. K. You, "Experimental Study on Stress Sharing Behavior of Composition Ground Improved by Sand Compaction Piles with Low Replacement Area Ratio", Journal of KGS, Vol.19, No.5, pp.253-261, 2003[in Korean].
  5. S. K. You, T. Matsui, W. P. Hong and G. L. Yoon, "Study on Stress Sharing Mechanism Composition Ground Improved by SCP with Low Replacement Area Ratio", KGS Spring Conference 2004, pp.197-202, March, 2004[in Korean].
  6. H. Y. Shin, S. J. Han, S. S. Kim and J. K. Kim, "Behavior of Composite Ground Improved by SCP with Low replacement Ratio", Journal of Korean Society of Civil Engineers, Vol.25, No.6C, pp.369-378, 2005[in Korean].
  7. B. I. Kim, S. W. Lee, B. S. Kim and W. K. Yoo, "Comparison of Bearing Capacity between SCP and GCP by Unit Cell Model Tests", Journal of KGS, Vol.20, No.8, pp.41-48, 2004[in Korean].
  8. B. S. Chun and Y. H. Yeoh, "Characteristics of Settlement and Bearing Capacity of Soft Ground Improved by Granular Pile", Journal of the Korean Geoenvironmental Society, Vol,2, No.4, pp.289-294, 2001[in Korean].
  9. S. K. You, "A Comparative Study on the Effect of Promoting Consolidation between SCP and GCP", Journal of Korean Geosynthetics Society, Vol.8, No.2, pp.41-46, 2009[in Korean].
  10. Y. Heo, Z. Zheng, C. K. Lee and K. K. Ahn, "Centrifuge Modeling on Displacement Shapes of Composite Ground Improved by SCP and GCP", Journal of the Korean Geoenvironmental Society, Vol,7, No.5, pp.57-66, 2006[in Korean].
  11. Miyakawa, Design Method of Soft Ground Embankment, Soil and Foundation(part 3), Japanese Geotechnical Society, pp. 178-181, 1961[in Japanese].
  12. A. Asaoka, "Observational Procedure of Settlement Prediction", Soils and Foundation, Vol.18, No.4, pp.87-101, 1978. DOI: http://dx.doi.org/10.3208/sandf1972.18.4_87
  13. H. Moden, A New Time-Fitting Method for the Settlement Analysis of Foundation on Soft Calys, Memorial Faculty of Eng., Hiroshima Univ., 2-1, pp.21-25, 1963.
  14. S. D. Lee, Soil Laboratory Testing, Saeron Publication, 1996[in Korean].