토목섬유 튜브 설계는 토목섬유와 충진재 간의 수리학적 양립성으로 충진압과 토질특성 및 토목섬유 특성, 설치되는 지반의 기초 특성 등과 같은 많은 요소에 의해 성능이 영향을 받기 때문에 매우 복잡하다. 본 연구에서 개발된 하이브리드 토목섬유 튜브는 원주를 다양하게 토목섬유재질로 구성하여 배수성능과 충진능력을 최적화 할 수 있었다. 실험적으로 확인하고자 제작된 복합재질의 토목섬유백에 준설토를 충진시키는 스케일모델시험을 실시하였다. 제작된 4개의 토목섬유백을 활용한 실험을 통하여 보유성능과 충진시간 및 간극수압 등이 평가되었다. 최종적으로 토목섬유의 상호간 재질의 구성방법의 변화 및 원주면 길이의 변화 등으로 토목섬유의 성능을 최적화한 연구결과가 제시되었다.

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.

The geotextile tube’s performance in strength, dewatering, retaining solid particles and stacked stability have been studied extensively in the past. However, only little research have been done in the observation of stress behavior of geotextile tubes. In this paper, a large-scale apparatus for geotextile tube experiment is introduced. Model tests was conducted using a custom made woven geotextile tubes. Load cells placed at the inner belly of the geotextile tube to monitor the total soil pressure. The pressure sensors are attached to a data logger which sends the collected data to a desktop computer. The experiment results showed that the maximum geotextile the soil pressure distribution varies at each geotextile tube section.