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

Korean Geotechnical Society (한국지반공학회)
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Correlation of Constrained Modulus for Busan Clay using DMT

DMT를 이용한 부산점토의 변형계수 추정

  • Hong, Sung-Jin (Dept. of Civil, Environmental and Architectural Engrg., Korea Univ.) ;
  • Cho, Yong-Soon (Dept. of Civil, Environmental and Architectural Engrg., Korea Univ.) ;
  • Jung, Sang-Jin (Busan New Port North Container Terminal Phase 2-1, Engineering & Construction, Samsung) ;
  • Lee, Woo-Jin (Dept. of Civil, Environmental and Architectural Engrg., Korea Univ.)
  • 홍성진 (고려대학교 건축.사회환경공학과) ;
  • 조용순 (고려대학교 건축.사회환경공학과) ;
  • 정상진 (삼성물산 건설부문 북컨 2-단계 축조 현장) ;
  • 이우진 (고려대학교 사회환경시스템공학과)
  • Published : 2008.03.28
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Abstract

Because the flat dilatometer (DMT) is operated in appropriate strain level, it has been known as an adoptable in-situ tool to evaluate the compressibility of soils compare with other in-situ test tools, such as SPT and CPT. This study is concerned about prediction method of constrained modulus by DMT, and a series of DMT and consolidation tests are performed at Busan new-port, Yangsan and Noksan test sites. By comparing DMT results with lab tests, the suitability of constrained modulus correlation, which is suggested by Marchetti, is investigated in Busan clay and new correlation is suggested. In lab test result, the compression indices ($C_c$) of Busan clay are turned out to be 0.4~0.12, and the constrained moduli are found out 0.5MPa~3MPa and these are increase with depth. The predicted constrained moduli using Marchetti's correlation are turned out 0.5MPa~4MPa, and these are bigger than measured constrained moduli by lab tests. By analyzing lab test and DMT results, it is shown that the correlation coefficient ($R_M=M/E_D$) has a linear relationship with (1/$I_D$) in Busan.

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