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성토지지말뚝공법 중 섬유보강재의 인장력 검토에 관한 연구
문인호(Moon In-ho),박종관(Park Jong-Gwan),이일화(Lee Il-Wha) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Road or Railway construction over soft ground is needed to be considered on secondary consolidation which will be caused differential settlement, lack of transport serviceability, higher maintenance cost. Especially for the railway construction in the second phase of Gyung-Bu or Ho-Nam high speed railway, concrete slab track has been adapted as a safe and cost effective geotechnical solution. In this case controlling the total settlement under the tolerance is essential. And pile supported geogrid reinforced construction method is suggested as a solution for the problem of the traditional method on soft soil treatments. Pile supported geogrid reinforced construction method consists of piles that are designed to transfer the load of the embankment through the compressible soil layer to a firm foundation. The load from the embankment must be effectively transferred to the piles to prevent punching of the piles through the embankment fill creating differential settlement at the surface of the embankment. The arrangement of the piles can create soil arching to carry the load of embankment to the piles. In order to minimize the number of piles geogrid reinforced pile supported construction method is being used on a regular basis. This method consists of one or more layers of geogrid reinforcement placed between the top of the piles and the bottom of the embankment. This paper presents several methods of pile supported geogrid reinforced construction and calculation results from the several methods and comparison of them.
공기 부상바식 이송시스템의 추진 노즐 배치방법에 따른 웨이퍼 이송 속도 평가
문인호(In-Ho MOON),김동권(Dong-Kwon KIM),조상준(Sang-Joon CHO),황영규(Young-Kyu HWANG) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this study, the wafer transportation speed was evaluated by numerical and experimental method for three injection nozzle array(face, front, rear) in an air levitation system. Test facility for 300 ㎜ wafer was equipped with two control tracks and a transfer track of 1.5 m length. The diameter and air velocity of injection nozzle are 0.8 ㎜, 50~100㎧ respectively. When the numerical results compared with experimental results of maximum wafer transportation speed, the numerical results are higher by 16%. The numerical result of mean wafer transportation speed is higher than experimental result about 20% in front array and 18% in face array.