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- W2319909085 abstract "본 연구에서는 환형수조를 이용한 침식실험을 통하여 국내 최초로 퇴적저면의 침식매개변수들이 정량적으로 산정되었다. 퇴적저면은 고농도의 고령토 슬러리를 기 설정된 시간 동안 압밀시켜 조성되었으며, 각기 다른 압밀구조를 갖는 퇴적저면 조건 하에서 총 4회의 침식실험이 수행되었다. 침식실험 결과에 따르면, 흐름전단응력 <TEX>${tau}_b$</TEX>에 대한 저항력을 나타내는 저면전단강도 <TEX>${tau}_s$</TEX>는 압밀시간 및 저면(퇴적층) 깊이가 깊어짐에 따라 증가하는 것으로 나타났다. 한편, 침식률<TEX>${epsilon}$</TEX>은 흐름전단응력과 저면전단강도의 차로 주어지는 잉여전단응력 <TEX>${tau}_b-{tau}_s$</TEX>과 상관성이 매우 큰 것으로 나타났는데, <TEX>${tau}_b-{tau}_s{leq}0.1N/m^2$</TEX>인 경우에 침식률의 로그 값은 잉여전단응력과 선형적 관계에 있으나, <TEX>${tau}_b-{tau}_s{leq}0.1N/m^2$</TEX>인 조건에서는 잉여전단응력이 작아질수록 침식률이 급격하게 작아지는 경향이 있는 것으로 나타났다. 또한 본 연구에서는 과거 연구결과와의 비교검토를 통하여 본 침식실험 결과에 대한 타당성이 입증되었으며, <TEX>$0.1N/m^2$</TEX> 이하의 잉여전단응력 구간에서 침식률을 보다 잘 표현할 수 있는 새로운 침식률 산정식이 제시되었다. In this study, the erosional parameters for deposit beds were quantitatively estimated domestically for the first time through the erosion tests using an annular flume. Four erosion tests were carried out for the deposit beds with different consolidation structures, which were obtained by consolidating the kaolinite slurries for a given time durations. Results of erosion tests showed that the bed shear strength <TEX>${tau}_s$</TEX> increased with the consolidation time and bed depth. The erosion rate <TEX>${epsilon}$</TEX> was also shown to be related well with the excess shear stress <TEX>${tau}_b-{tau}_s$</TEX> which was given by the difference between flow shear stress <TEX>${tau}_b$</TEX> and bed shear strength <TEX>${tau}_s$</TEX>. While the logarithm of the erosion rate was linearly related with the excess shear stress as <TEX>${tau}_b-{tau}_s{geq}0.1N/m^2$</TEX>, however, the erosion rate decreased rapidly with it when <TEX>${tau}_b-{tau}_s{leq}0.1N/m^2$</TEX>. These erosion test results were also shown to be good enough to verify by comparing with the test results from previous studies and a new equation was suggested to describe the erosion rate more well in the region of <TEX>${tau}_b-{tau}_s{leq}0.1N/m^2$</TEX>." @default.
- W2319909085 created "2016-06-24" @default.
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- W2319909085 date "2014-01-01" @default.
- W2319909085 modified "2023-09-24" @default.
- W2319909085 title "A Laboratory Study on Erosional Properties of the Deposit Bed of Kaolinite Sediments" @default.
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- W2319909085 doi "https://doi.org/10.12652/ksce.2014.34.4.1181" @default.
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