한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제23권5호
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  • Pages.89-100
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  • 2007
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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건조 고결층이 형성된 준설 매립 지반의 지지력 산정에 대한 연구

Bearing Capacity Evaluation of Marine Clay Dredged Deposit Including Desiccated Crust Layer

  • 박현구 (한국과학기술원 건설 및 환경공학과) ;
  • 변위용 (삼성엔지니어링) ;
  • 지성현 (현대건설 기술연구원) ;
  • 이승래 (한국과학기술원 건설 및 환경공학과)
  • Park, Hyun-Ku (Dept. of Civil and Environmental Engrg., Korea Advanced Institute of Science and Technology) ;
  • Byeon, Wi-Yong (Samsung Engrg. Co., Ltd.) ;
  • Jee, Sung-Hyun (Hyundai Engrg. and Construction Co. Ltd.) ;
  • Lee, Seung-Rae (Dept. of Civil and Environmental Engrg., Korea Advanced Institute of Science and Technology)
  • 발행 : 2007.05.31
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초록

본 연구에서는 건조 고결층이 형성된 준설 매립 지반의 지반 개량 및 보강을 위한 시공 초기 단계에서 지반의 안정성과 장비의 주행성 평가 시 고려되는 지지력 산정과 관련하여 다양한 실내 및 현장 시험을 수행하였다. 지반조사를 통해 기본물성 특성을 파악하였고 현장 베인 시험 및 일축압축 직접전단시험을 통하여 지반의 깊이별 강도분포와 고결층의 강도 특성 및 응력-변형률 거동을 살펴보았다. 또한 지반의 지지력 평가와 하중-침하 곡선 및 파괴형태를 파악하기 위하여 평판재하시험을 수행하였다. 기존의 2층 지반 지지력 산정 기법을 이용하여 지지력을 산정하였으며 이를 평판재하시험 결과와 비교하여 지지력 산정 기법의 적용 방법에 대하여 논의해 보았다.

In this study, various field and laboratory tests were performed to investigate the characteristics of shear strength and bearing behavior to be considered in the estimation of stability and trafficability in early stage of stabilization process in marine clay dredged deposit. Site characterization was carried out to grasp the basic properties of the deposit. Field vane test, unconfined compression test and direct shear test were conducted to evaluate the shear strength distribution for varied depths, and the characteristics of shear strength and stress-strain behavior of the crust layer. Plate load tests were also performed to estimate the bearing capacity and to assess load-settlement behavior and failure pattern of the deposit. The bearing capacity was also estimated using previously proposed methods for double-layered clay deposit. The estimated bearing capacity was compared with the results of the plate load tests and then, the applicability of the estimation method was discussed.

키워드

참고문헌

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