한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제25권6호
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  • Pages.73-88
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  • 2009
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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인천 송도지역 지반의 변동성 분석

Characterization of Soil Variability of Songdo Area in Incheon

  • 김동휘 (고려대학교 건축.사회환경공학부) ;
  • 안신환 (고려대학교 건축.사회환경공학부) ;
  • 김재정 (고려대학교 건축.사회환경공학부) ;
  • 이우진 (고려대학교 건축.사회환경공학부)
  • Kim, Dong-Hee (School of Civil, Environmental and Architectural Engrg., Korea Univ.) ;
  • An, Shin-Whan (School of Civil, Environmental and Architectural Engrg., Korea Univ.) ;
  • Kim, Jae-Jung (School of Civil, Environmental and Architectural Engrg., Korea Univ.) ;
  • Lee, Woo-Jin (School of Civil, Environmental and Architectural Engrg., Korea Univ.)
  • 발행 : 2009.06.30
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초록

지반의 변동성은 많은 독립된 불확실성 요소로부터 발생하는 복잡한 요소이며, 지반의 변동성은 주로 내재적 변동성과 측정오차에 의해서 발생한다. 본 논문에서는 지반의 변동성을 평가하는 지표로 사용되는 변동계수를 송도지역의 지반정수 및 지층에 대하여 산정하였다. 지반정수의 변동성은 지층 및 흙의 종류에 영향을 받으므로 지층은 매립층과 퇴적층, 흙의 종류는 점토와 실트로 구분하여 각각의 변동계수를 산정하였다. 퇴적층과 점토의 변동계수가 매립층과 실트에 비하여 작은 것으로 분석되었다. 또한, 풍화가 많이 진행된 암반과 토사가 신선한 암반과 풍화암에 비하여 상대적으로 큰 변동계수를 보이는 것으로 나타났다. 본 논문에서 제시한 송도지역의 변동계수는 신뢰성해석의 자료로 사용될 수 있을 것으로 판단된다.

Geotechnical variability is a complex feature that results from many independent sources of uncertainties, and is mainly affected by inherent variability and measurement errors. This study evaluates the coefficient of variation (COV) of soil properties and soil layers at Song-do region in Korea. Since soil variability is sensitive to soil layers and soil types, the Cays by soil layers (reclaimed layer and marine layer) and the COVs by soil types (clay and silt) were separately evaluated. It is observed that geotechnical variability of marine layer and clay is relatively smaller than that of reclamation layer and silt. And, the highly weathered rock and soil show the higher cays in the interpretation of the strength parameters of the fresh and weathered rock. And the proposed COV of Songdo area can be used for the reliability-based design procedure.

키워드

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