Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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A Comparison of Analysis Methods on Mechanical Behavior of Stone Column Reinforced in the Soft Sabkha Deposit

연약 암염층(Sabkha)에 보강된 스톤컬럼의 침하거동에 관한 해석방법 비교연구

  • Kim, Se-Won (Department of Civil Engrg, Texas A&M Univ.) ;
  • Lee, Chul-Ho (School of Civil, Environmental & Architectural Engrg., Korea Univ.) ;
  • Kim, Ki-Ho (Deputy General Manager, Samsung Engrg. Co., LTD) ;
  • Choi, Hang-Seok (School of Civil, Environmental & Architectural Engrg., Korea Univ.)
  • 김세원 (텍사스 A&M 대학 토목공학과) ;
  • 이철호 (고려대학교 건축사회환경공학부) ;
  • 김기호 (삼성엔지니어링) ;
  • 최항석 (고려대학교 건축사회환경공학부)
  • Received : 2010.08.05
  • Accepted : 2010.12.06
  • Published : 2011.01.31
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Abstract

In this study, a composite behavior of stone columns reinforced in a soft ground, Sabkha, has been evaluated by performing a series of field measurements and numerical analyses. Field load tests were performed to verify the effect of the composite ground reinforced by stone columns in Kayan, Saudi. The settlement measured in the field test was compared with the settlement calculated by the Priebe method and the numerical analysis using ABAQUS. It is found that the settlement estimated using the Priebe method significantly overestimated the settlement measured in the field test. In addition, it is confirmed that consideration of confining effect exerted by surrounding adjacent stone columns in a numerical simulation is indispensable to estimate accurately the settlement of stone column composite ground.

본 논문에서는 일련의 현장시험과 수치해석을 통해 연약 암염층(Sabkha)에 보강된 스톤컬럼의 침하거동 특성을 평가하였다. 스톤컬럼으로 보강된 복합지반의 침하거동특성을 평가하기 위해 Saudi의 Kayan 지역에 시공된 스톤컬럼에 대한 현장 재하시험을 수행하였다. 스톤컬럼의 보강효과를 평가하기 위해 현장시험결과와 Pribe의 간편법, 그리고 수치해석 결과를 상호 비교 분석 하였다. 수행된 연구결과, Priebe 제안식으로 산정한 침하량은 스톤컬럼이 시공된 실제 현장의 침하량보다 과다하게 평가함을 확인하였다. 또한, 수치해석을 통해 스톤컬럼이 보강된 복합지반의 거동을 예측할 때, 주변에 시공된 스톤컬럼들의 구속에 의한 지지력이 향상되는 효과를 적절히 고려해야 함을 알 수 있었다.

Keywords

References

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