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자료유형
학술저널
저자정보
저널정보
한국터널지하공간학회 한국터널지하공간학회 논문집 한국터널지하공간학회 논문집 제10권 제1호
발행연도
2008.1
수록면
25 - 36 (12page)

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When constructing subsea underground structures, the influence of high water and seepage pressure acting on the structures can not be neglected. Thus hydro-mechanical coupled analysis should be performed to estimate the behavior of the structures precisely. In practice, relaxed rock load is generally used for the design of tunnel concrete lining. A method based on the distribution of local safety factor around a tunnel was proposed for the estimation of a height of relaxed rock mass (Hrelaxed). In this study, the validation of the suggested method is investigated in the framework of hydro-mechanical coupled analyses. It was suggested that inducing inflow by pumping through a drainage well gave more reliable results than inducing inflow with shotcrete hydraulic characteristics in case of rock condition of Class III. In this study, therefore, inducing inflow by pumping through a drainage well are adopted in estimating Hrelaxed due to a tunnel excavation with the rock condition of Class I, III, and V. Also the estimated Hrelaxed results are compared with those of the existing suggested methods. As the result of this study, it is confirmed that estimating Hrelaxed based on the distribution of local safety factor around a tunnel can be effectively used even for the case of hydro-mechanical coupled analysis. It is also found that inducing inflow pumping through a drainage well gives more precise and consistent Hrelaxed of a subsea structure.

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