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준설 토목섬유 튜브의 배수상태에 따른 지지력 변화에 관한 연구
이장백(Jang-Baek Lee),성현종(Hyun-Jong Sung),이광형(Kwang-Hyung Lee),김형주(Hyeong-Joo Kim) 한국지반신소재학회 2014 한국지반신소재학회 학술발표회 Vol.2014 No.4
In this study a cone penetration test on a dredged soil filled geosynthetic tube was performed after the tube attained its final height. The cone penetration was carried at different point locations along the length of the geosynthetic tube under submerged and dry conditions. It was found that the bearing capacity of the soil inside the tube is low when the geotextile tube is submerged in water. The bearing capacity of the tube structure is increased when water is drained.
이장백(Jang-Baek Lee),성현종(Hyun-Jong Sung),박태웅(Tae-Woong Park),김형주(Hyeong-Joo Kim) 한국지반신소재학회 2013 한국토목섬유학회 학술발표회 Vol.2013 No.11
In this study, a custom-made geotextile tube made of polypropylene (PP) material was used during a large-scale experimental test. Dredged soil sediments (USCS Category: SM) collected from within the Saemanguem estuary were utilized as fill materials for the geotextile tube. Slurry was hydraulically pumped into the geotextile tube. A T-shaped slurry delivery system installed at the inlet of the geotextile tube is introduced in this paper. The tube was filled with dredged soil until its vertical height reaches up to 50% its theoretical diameter. The soil distribution inside the geotextile tube generated by the T-shaped inlet was improved. The quantity of the fine-grained particles passing #200 sieve increases as the sedimentation distance extends farther from the inlet location, that is, the amount of fine-grained soil passing #200 sieve at the ends of the geotextile tubes is higher than the amount of fine-grained soil passing #200 sieve around the inlet. Moreover, the properties of the soil in the uppermost deposition layer is identical to the physical properties of soil sediments in the bottom layer. However, the domestically produced geotextile material used in the experiment expelled a considerable amount of surplus silt outside the geotextile tube. The amount passing #200 sieve for the surplus soil is 43.3%. For the type of soil used in the experiment, it is recommended that a geotextile material with finer openings should be used.