A series of injection and drainage test were conducted on an circular acrylic tube to investigate the pressure generated by the accumulated fill materials inside a circular acrylic tube structure. The acrylic tube was filled by means of gravity filling with a slurry material having an average water content of 700%. The water head during the filling process was 1.8m and the bottom pressure during initial filling was 20.18kPa. The recorded stress at the sides of the acrylic tube was 17.89kPa during the filling process and was reduced to 13.58kPa during the leaving process. Continuous drainage of the acrylic tube has greatly influenced the stresses around the tube structure. As the water is gradually allowed to overflow, the generated pressure at the topmost pressure sensor of the tube was reduced further to 2.17kPa. Eventually, the initially liquid state slurry material transforms into plastic state after water has dissipated and substantial soil particles are deposited in the acrylic tube. The final water content of the deposited silt inside the acrylic tube after the test was 42%. It was found that the state of stresses(geo-static earth pressures) in the acrylic tube was anisotropic rather than isotropic.

1. 서 론
2. 원형 아크릴 튜브 구조체의 내부 압력과 인장력
3. 원형 아크릴 튜브 구조체 실험의 주입 재료 및 배수 특성
4. 원형 아크릴 튜브 구조체 주입 및 배수 실험장치
5. 실험 결과 및 분석
6. 결 론
감사의 글
References

• 김형주(군산대학교 토목공학과 교수) | Kim, Hyeong-Joo
• 원명수(군산대학교 토목공학과 조교수) | Won, Myoung-Soo
• 이장백(군산대학교 토목공학과 박사과정) | Lee, Jang-Baek
• 박태웅(군산대학교 토목공학과 박사과정) | Park, Tae-Woong Corresponding author