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사질토 지반에서 정적 수평하중에 따른 말뚝기초의 거동특성
김문채 ( Moon Chae Kim ),이태광 ( Tae Gwang Lee ) 조선대학교 공학기술연구원 2014 공학기술논문지 Vol.7 No.4
In order to fulfill the needs of reliable and economically feasible foundation, engineers should consider not only the working load that can endure extreme conditions but also apprehending precise behavior of load while designing the foundation of offshore wind power generators. To actualize the foundation, a model pile was made in miniature, diameter of 50mm and length of 550~1,000mm. Pile is commonly used as foundation in long span bridges and marine bridges, the size was proportionately reduced. Also, calibration chamber was made of 1300×700×1000mm (length × width × height) and a 500mm height of sand-bed was made to perform Static Lateral load experiment. While performing Static Lateral load test, we could observe that the ultimate lateral load has a trend of decrease, and the relative density increased.
오재화,박영길,김문채 朝鮮大學校 建設技術硏究所 2002 建設技術硏究 Vol.22 No.1
Bigger in the size, more diverse in the style, recently, the interest and necessity of effective safety consciousness during construction has been increased in the construction field. Through the literature reviews and questionnaire survey, this study proposes a realities of the effective safety consciousness in the construction field. The cause of safety supervision which influence safety prevention are diverse, among them, especially, the safety consciousness have great impact on the safety accident. According to, safety accidents can be protected through safety education and safety awareness of each employee. Ultimately, prevention and recognition against safety accident are changed depending on employed category of construction field, it is necessary to educate and confidence considering each employed category of construction work for safety supervision rather than to uniform education about safety consciousness.
안현민(Hyeon-Min Ahn),김문채(Moon-Chae Kim),김대현(Daehyeon Kim) 한국지반신소재학회 2014 한국지반신소재학회 논문집 Vol.13 No.4
연약지반 개량공법을 적용한 내부가호안의 압밀침하 특성을 신뢰성 해석을 이용하여 분석하였으며, 이를 통해 PVD 최적 타설 간격을 설정하였고 외곽호안은 압밀기간 변화에 따른 잔류침하에 대해 안정성을 확보하는지를 검토 하였다. 연약지반 압밀침하 특성에 대한 신뢰성 해석 결과에서 지반정수의 불확실성을 고려해 과다 적용된 배수재 타설 간격을 각 구견별로 구분하여 적용함으로써 지반정수의 불확실성과 안정성을 모두 확보하는 동시에 공사비 측면에서도 경제적인 연약지반 개량공법의 형식으로 검토되었다. 또한 허용잔류 침하량을 초과할 확률이 10%이내에 해당하는 압밀기간을 적용하여 잔류침하에 대한 안정성을 확보하였으며, 각각의 분할된 영역에서 목표 압밀도에 도달할 확률이 95%를 만족하는 배수재 간격으로 시공하고 잔류침하량의 발생량이 10cm를 초과하지 않은 범위일 때는 허용부등침하경사 이상의 부등침하가 발생할 가능성은 거의 없는 것으로 나타났다. In this paper, reliability analysis was done on the characteristics of consolidation and settlement for the inner temporary dike where a weak ground improvement construction was applied. When the consolidation analysis on the foundation ground was done, the following conclusions were obtained by conducting the stability analysis on the effect of space of drains, the effect of consolidation time, and the residual settlement and differential settlement. When construction was done with a drain space which satisfied 95% probability of reaching a target consolidation in each divided area, the occurrence of a residual settlement was within the range, which did not exceed 10cm. It was shown that there was almost no possibility of the occurrence of differential settlement, which was above the permissible differential settlement slope.