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박춘식,안병호 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-
This study predicted the settlement of the tunnel subsequent to the NATM excavation, the stress of shotcrete and the stress of rockbolt, in terms of the Finite Difference Method. The prediction result compared with the measure value of the field has led to verification of the validity of the prediction method. The following summarizes the study. (1) Comparing the prediction value and the measure value of the field showed that the former was higher than latter. (2) It is reasoned that the parameter of the geotechnical materials was underestimated and the prediction value was overestimated due to incorrect modeling of the ground condition. (3) However, it is assumed that the Finite Difference Method would predict the actual behavior of the tunnel since the difference was within a reasonable range.
三軸壓縮試驗에 의한 주문진標準砂의 變形·强度特性에 관한 硏究
박춘식,배성환 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-
This study investigated the deformation and strength characteristics of the Jumunjin standard sand by triaxial compression tests. The results are shown as follows. ⑴ While the difference of the internal friction angle ø_max between the small size specimen and the middle size specimen was insignificant, the volumetric strain was relatively great. ⑵ The ø_max was greater if density was high when other conditions were constant. It was also found that denser sand tended to show the peak value more clearly. ⑶ Compared to S.L.B. and Toyoura sand, the Jumunjin standard sand showed slightly greater confining pressure-dependency of ø_max.
유한요소법에 의한 호안의 강제치환 형상에 관한 변형예측 및 현장계측
박춘식,장정욱,하주화 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-
This study used the finite element method analysis to estimate enforced replacement shapes and replacement depth. The data were expected to be used as the fundamental data of the design through the comparison with the results of the elastic wave exploration and investigation. The results of the research are summarized in the following. (1) After dividing the breakwater into 5models, on which elastic wave exploration was performed, the enforced replacement shape has been obtained by the finite element method. The result was satisfactory compared to the results of the elastic wave exploration. (2) The enforced replacement shapes of the breakwater were compared in different ways; in the design, in the elastic wave exploration in field and in this study. While the enforced replacement shape in the design is substantially different from that in elastic wave exploration in field, it turned out to be similar to the results of this research. (3)If an enforced replacement shape is standardized in configuration of breakwater, depth of soft soil and th value of soil property, it can be used as the standardized section in designing breakwaters.
박춘식,장정욱,유기재,최성민 國立 昌原大學校 産業技術硏究所 2002 産技硏論文集 Vol.16 No.-
This Study investigated a possibility of lateral movement in the reconstruction field of Nongso bridge at Nongso-ri, Joochon-myeon, Kimhae. The methods applied in this study were the judgement formula and the Finite Element Method(FEM). The conclusions are shown in the following. 1) The application of the FEM, as well as the judgement formula resulted in the lateral movement. 2) Bridge abutment and foundation must be constructed after completing consolidation. 3) The occurrence possibility of lateral movement should be judged by the FEM that can re-present field conditions. 4) Lateral movement will take place in the case. Hence, settlement of proper countermeasure method should be followed by the construction.
교대의 조시시공을 위한 단계별 성토고 결정에 관한 연구
박춘식,장정욱,김종환 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
This study suggests solutions to the problem of consolidation settlement or lateral movement, which may occur when roads or civil structures are constructed on soft clay. It also presents a proposal to determine appropriate height and time of embankment for early construction of abutment, on the basis of soil parameters in terms of reverse analysis. The following shows the summary of the study. (1) The Hyperbolic method was applied to the field measurement to compute a predictable final settlement. (2) The field measurement was analyzed by Asaoka method and a reverse analysis was carried out on the coefficient of consolidation of the vertical drain method. (3) The target amount of settlement was determined by the try and error method, which considered consolidation settlement to form the planned height. (4) Appropriate heigh and time of stepped embankment was determined to reach the target amount of settlement. (5) Slope stability of the step embankment was examined.
흡입성 기원알레르겐 검색에 있어서 RAST와 피부시험의 비교
박춘식,김유영,강석영 대한천식알레르기학회 1983 천식 및 알레르기 Vol.3 No.1
The introduction of in vitro test for measurement of specific serum IgE has permitted correlations to be made between clinical history, skin tests and serum specific IgE level in allergic subjects. In this work, the agreement rate and correlation between skin tests and RAST was studied by using Phadebas RAST kits and Bencard alle sgen extracts of 14 common aUergens. 1. Total agreement rate of 14 allergens betweens skin tests and RAST is 66.7 g o. The agreement rate of Dermatophagoides farinae was 79.8% and thst of Dermatophagoides pteronys- sinus was 82.8%, which were higher than those of other allergens. 2 . RAST positive rate is 19.0% in the (+) group of skin test, 48.8% in the (++) group, a nd 79.2% in the (+++) group. False positive rate of RAST is 1,9%.
흡입성 기원 알레르겐 검색에 있어서 RAST에 피부시험의 비교
박춘식,김유영,강석영 대한천식알레르기학회 1981 천식 및 알레르기 Vol.1 No.2
The introduction cf In vitro tests for measure ment of speci Qc serum IgE has permitted correlationis to bern ade be:ween clinical history, skin tests and serum specif ic IgE levels in allergic subjects. In this work, the agreement rate and correl ation between skin tests and RAST were studied by using Phadebas RAST kits and Benc ard allergen extracts of 9 common allergens. 1. Total agreement rate of 9 allergens betv;een skin tests and RAST was 63. 2% , The agreement rate of Dermatophagoides farinae was 79. 4% and that of Dermatophagoides pteronyssin v.s I vas 7 7.5% which were higher than those of other al!rgen.. 2. RAST positive rate was 9.9% in t he ++ positive group of skin test and 24%' in the + + positive group and 86% in the ++++ ,' positive group. 3. Correlation between RAST and ski. Test was present in the case of Dermatophagoides pteror, ysinus, Dermatophagoides farinae and hcus= dust. 4. False( +) rate of RAST was 5%.
구속압 및 과압밀비가 점성토의 변형·강도특성에 미치는 영향]
박춘식,장정욱,최차석 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
The purpose of this study is to investigate the deformation and strength characteristics of clay by confining pressure and O.C.R by triaxial compression test. The results are shown as follows. 1)In normally consolidated clay soil of confining pressure, the more σ₃is increased, the more internal friction angle is decreased. 2) Within 0.3~4.0kgf/㎠ range of σ₃, internal friction angle has shown confining pressure about 5~6˚. 3)A point of destory, pore-pressure moduls is increased as σ₃is getting increase.