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함준호 ( Jun Ho Ham ),류기송 ( Ki Song Ryu ) 한국농공학회 1972 韓國農工學會誌 : 전원과 자원 Vol.14 No.1
Hydraulic computations to determine the elevation of canal bottom and mater surface for box type concrete culverts are discussed. Velocity and cross sectional area of flow are computed from Manning's formula. Aad then head loss and velocity head are considered to determine the elevation of bottom and water surface. For stress analysis, 13.5 ton live load and earth pressure are considered. Also longitudinal stress of box culverts is checked.
저소성(低塑性) 실트질(質)흙의 흙 시멘트에 관(關)한 연구(硏究)
김주범 ( Kim Joo Bum ),박완순 ( Park Wan Soon ),류기송 ( Ryu Ki Song ),김성교 ( Kim Seong Gyo ) 한국농공학회 1975 韓國農工學會誌 : 전원과 자원 Vol.17 No.2
The objective of this study is to determine an appropriate cement of soil-cement in which silty soil of salty tidal flat with low plasticity was used. Physical, chemical and mechanical tests were conducted to find out the standard properties of the soil to be used. Various cement contents used in this test were 8%, 10%, 12%, and 14%, and the compressive strength was tested after 7 days and 28 days of standard curing in the above each cement content respectively. The results obtaind are summarized as follows. 1. As the cement content was increased from 8% to 14%, Maximum dry density (M.D.D.) and optimum moisture content (O.M.C.) were not changed remarkably. 2. Density of soil-cement was directly proportional to cement content and inversely proportional to water content. 3. OMC was generally decreased in proportion to the increase of cement content. 4. Compressive stranth was directly proportional to centent and inversely proportional to water content. 5. In freezing and thawing test, maximum loss of 10% in the total Weight was found on the 8% cement mixture. and This loss was rapidly decreased to 2% when the Cement content of the mixture was more than 10%.