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Experimental Study on the Behavior of Hybrid Geotextile Tubes During Dredging Soil Filling
김형주,김형수,장르 한국복합신소재구조학회 2020 복합신소재구조학회논문집 Vol.11 No.5
In designing geotextile tubes, obtaining hydraulic compatibility between the geotextile and the filler material can be complex because the geotextile tubes performance is affected by many factors such as the filling pressure, soil properties, geotextile properties, foundation properties. Hybrid geotextile tubes, which are tubes composed of various geotextiles arranged circumferentially, were proposed by the authors to optimize their filling and dewatering performance. To assess the behavior of hybrid geotextile tubes during filling, a scale model test on hybrid geotextile bags during filling was conducted. Through the scale model test, the retention performance, filling time, and water pressure of four hybrid geotextile bags were evaluated. The results of the study show that the performance of geotextile tubes can be optimized in various ways by interchanging the geotextile placement, by changing the circumferential lengths of geotextiles, and using geotextiles with different properties.
침투수압이 작용된 Hanging Bag 시험에 의한 토목섬유 튜브 구조체의 압밀해석에 관한 연구
김형주,피터 레이 디노이,박태웅,문성길,김형수,장르 한국복합신소재구조학회 2017 복합신소재구조학회 학술발표회 Vol.2017 No.04
Geotextile tubes are excellent design strategies for both shoreline protection and dewatering of fine materials. A difficulty with regard to designing geotextile tubes is the matching of the appropriate fabric with the site-specific infilled material and the unavailability of a test to determine the soil-geotextile consolidation properties. Existing methods simulate and predict the final tube shape based on the initial and final unit weights of the infill but the time required to reach the final shape or the compatibility of the infill are not being considered. This study proposes an improved hanging bag test to evaluate the compatibility of an infill with the geotextile fabric, and at the same time, to obtain the soil-geotextile consolidation properties. With the obtained consolidation properties, a big prototype simulation was possible, explaining the deformation behavior of the tube in the field. An analytical procedure used in modeling the tube was coupled with the large strain consolidation theory to simulate the filling and dewatering process.