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RISS 인기검색어
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- 저자 : 정유승(Yuseung Jeoung) (검색결과 1 건)
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정유승(Yuseung Jeoung),허광희(Gwanghee Heo),서상구(Sanggu Seo),전승곤(Seunggon Jeon),방건혁(Geonhyeok Bang),이재훈(Jaehoon Lee) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.3
This study calculated the steel pipe propulsion friction force required for tunnel excavation. To experimentally estimate the frictional resistance of a steel pipe, a model soil tank was constructed, and the steel pipe propulsion test was conducted under the condition of applying the earth pressure calculated from the field data. To analyze the effect of the earth pressure when the steel pipe was inserted, the section where the load was most generated was selected and a numerical analysis was performed. In the numerical analysis, the shear force was assumed to uniformly act on the entire steel pipe, and consequently, the resistance owing to the overburden load uniformly acted on the entire section. For the model steel pipe, the cross section and thickness of the steel pipe were maintained in a ratio of 1:4 to the actual size according to the law of similarity to which the scale factor was applied for the steel pipe penetration simulation. In the steel pipe propulsion experiment, the frictional resistance of the steel pipe was estimated using the soil analysis of the stratum based on the drilling result of the steel pipe penetration section and using it as the load condition. From the data obtained in the experiment, the frictional resistance trend line according to the overburden load was determined, and the frictional resistance of the steel pipe was calculated using this trend line. Based on these data, the intrusion simulation of the propulsion pipe was performed, and the estimated resistance was compared with the theoretically calculated resistance. Consequently, the error rate was less than 5%, and the proper steel pipe propulsion friction force was derived.
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