Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Prediction of Residual Settlement of Ground Improved by Vertical Drains Using the Elasto-Viscous Consolidation Model - Application for Field Condition -

탄-점성 압밀이론에 의한 버티칼 드레인 타설지반의 잔류침하 예측 (II) - 현장조건에의 적용 -

  • 백원진 (서정엔지니어링 주식회사 부설 연구소) ;
  • 이강일 (대진대학교 공과대학 건설시스템공학과) ;
  • 김우진 (전남대학교 공과대학 토목공학과)
  • Published : 2007.06.30
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Abstract

In this study, in order to propose the prediction method of the residual settlement of clayey ground improved by vertical drains, a series of numerical analyses for a model ground were carried out using the elasto-viscous consolidation model. And the effects of ground improvement conditions of the ratio of effective radii $(r_e/r_w)$, consolidation pressure $({\Delta}p)$ on normally consolidated state, and the OCR (overconsolidation ratio) on overconsolidated state to reduce the residual settlement in three-dimensional consolidation by vertical drains were investigated by performing a series of numerical analyses. Furthermore, based on the results of a series of numerical analyses for the model ground, the predicting method of the residual settlement of clayey ground with vertical drains and the determination method of the value of OCR required to control the residual settlement within an acceptable value are proposed.

본 연구에서는 버티칼 드레인으로 개량된 점성토 지반의 잔류침하 예측법을 제안하기 위하여 모델지반에 대해 탄-점성 압밀이론을 이용한 일련의 수치해석을 행하였다. 그리고 수치해석을 통하여 정규압밀영역에 대해 유효반경비, 압밀압력의 영향과 버티칼 드레인에 의한 3차원압밀에 있어서의 잔류침하를 감소시키기 위한 과압밀영역에서의 과압밀비의 영향을 조사하였다. 또한, 모델지반의 수치해석결과에 기초하여 버티칼 드레인 타설지반의 잔류침하 예측법과 잔류침하를 허용치 이내로 제어하기 위해 필요한 과압밀비의 결정법을 제안하였다.

Keywords

References

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