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RISS 인기검색어
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- 저자 : 玉致南(Chi-Nam Ok) (검색결과 3 건)
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玉致律(Chi-Youl Ok),金宗周(Joug-Ju Kim),玉致南(Chi-Nam Ok) 한국해양공학회 1990 韓國海洋工學會誌 Vol.4 No.1
We experimented the physical property of the porous concrete by changing the water cement ratio, when the aggregate ratios are 1 : 5 and 1 : 7 separately.<br/> And then we received the results as follows.<br/> The bigger, the coarse grading of the porous concrete is, the more sensitive to the water cement ratio, the porous concrete becomes.<br/> And if we think over its compressive strength, the coarse aggregate which has 5~15㎜ width is most appropriate.<br/> So we concluded that when its compressive strength, permeability coefficient and its unit weight are 50㎏/㎠ 3㎝/sec and 1900㎏/㎥ respectively, the water cement ratio which has 35~37% width is most appropriate, too.<br/> And its compressive strength and unit weitht show that they are about a quarter and three quarters respectively about the conventional concrete.
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嚴采永,玉致南 동아대학교 공과대학 부설 한국자원개발연구소 1980 硏究報告 Vol.4 No.2
Civil engineers have been applying the stability analysis to calculate the gradient of slope of earth dams so far. Nowaday the stability analysis is carried out by means of the digital computer. But this analysis is a complicated trial and error method for presupposed sections of dams and requires for highly skilled expert engineers to repeat tedious and expensive operations of a large size computer. In this paper, a new convenient and rational method is proposed instead of the complicated conventional analysis technique. The new method is based on the Fellenis method. All the conditions to calculate the gradient of slope are composed of the basic theoretical formulars and the empirical ones. The results are given from the computer calculated datas as the Determination Graphs for the Gradient of Slope of Earth Dams by using the Angle of Internal Friction and Cohesion. The proposed method has the following features ; 1. In case of using the Determination Graphs, the gradient of slope of earth dams are determined only by means of the statics property of soil instead of the conventional trial and error method. 2. When a dam is built more than 25.0M approximately in height, it is economical to use soil with greater angle of internal friction. 3. The safety factor of a dam is independent on the variation of the unit weight of soil. 4. The safety factor versus gradient of slope graphs show the linear trend of change.
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