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, 2015ABSTRACT : Big tidal differences, which range from 3.0 m to 8.0 m, exist with regional locations at south and west shores of Korea. Under this ocean circumstance, since a large scour may occur due to multi-directional tidal current and transverse stress of the wind, the scour surrounding the wind turbine structure can make instability of the system due to unexpected system vibration. The hydraulic resistance capacity of soils consolidated under different pressures are evaluated by Erosion Function Apparatus (EFA) under uni- directional and bi-directional flows in this study. It was found that the flow direction change affects significantly on the sour rate and critical shear stress, regardless of soil types while the consolidation pressure affects mainly cohesive soil. Among geotechnical parameters, the undrained shear strength can be well-correlated with the hydraulic resistance capacity, regardless soil type while the shear wave velocity shows the proportional relationships with the hydraulic resistance capacities of fine grained soil and coarse grained soil, respectively.Keywords : Flow direction, Consolidation pressure, Hydraulic resistance capacity, Erosion function apparatus (EFA), Shear wave velocity :      38m                     .                    .          ,       .                    .      ,                                . : , , ,   ,

Effects of Flow Direction and Consolidation Pressure on Hydraulic Resistance Capacity of Soils