Top-Down 공법이 적용된 지중연속벽의 설계시 측방토압의 적합성 평가

홍원표(Hong Won-Pyo),강철중(Kang Chul-Joong),윤중만(Yun Jung-Mann) 한국토목섬유학회 2012 한국지반신소재학회 논문집 Vol.11 No.1

본 연구에서는 지중연속벽 설계시 사용되는 범용 해석프로그램에 Rankin(1857)의 이론토압과 홍원표와 윤중만(1995a)의 경험 토압을 각각 적용하여 Top-Down 공법에 적용된 지중연속벽의 수평변위를 분석하였다. 그리고 이들 해석 프로그램에서 산정된 예측변위량과 지중경사계로 측정된 실측변위량을 비교 검토하였다. 현재 지중연속벽 설계에 적용되는 해석프로그램에는 Rankine의 토압이 주로 적용되고 있다. 검토결과, 지중연속벽의 예측수평변위는 적용되는 토압에 따라 상당히 큰 차이를 나타내고 있다. Rankine의 토압을 적용하여 산정된 예측수평변위 형상은 실측결과와 큰 차이를 보이고 있으며 벽체의 하부에서 예측치가 실측치보다 과다하게 산정되었다. 반면, 홍원표·윤중만의 토압을 적용하여 얻은 예측수평변위 형상과 최대수평변위 량은 실측결과와 유사하게 나타났다. 따라서 Top-Down 공법이 적용된 지중연속벽의 설계시 Rankine의 토압보다는 홍원표·윤중만의 경험토압을 적용하는 것이 적합함을 알 수 있다. The Rankine(1857)'s earth pressure and the Hong and Yun(1995a)'s earth pressure was applied to analyze the lateral displacement of diaphragm wall applied to the Top-Down construction method using the computer program, which is a common design program for diaphragm wall. The lateral displacement estimated by the computer program was compared with the lateral displacement measured by inclinometer. The Rankine's earth pressure has been widely used to design the diaphragm wall in the analysis of computer program. As the result of comparison, the lateral displacement of diaphragm wall was predicted differently according to the applied earth pressures. The behavior of lateral displacement predicted by the Rankine's earth pressure was different with displacement measured by inclinometer and the lateral displacement at the bottom part was overestimated. However, the lateral displacement predicted by the Hong and Yun's earth pressure is similar to the behavior and maximum value of real displacement. Therefore, the Hong and Yun's earth pressure is more suitable than the Rankine' earth pressure to design the diaphragm walls applied to the Top-Down Construction Method.

논문 : Top-Down 공법이 적용된 흙막이벽의 역해석을 이용한 거동분석

홍원표 ( Won Pyo Hong ),강철중 ( Chul Joong Kang ),윤중만 ( Jung Mann Yun ) 대한지질공학회 2012 지질공학 Vol.22 No.1

본 연구에서는 흙막이벽 설계시 널리 사용되고 있는 SUNEX 프로그램을 이용하여 Top-Down 공법이 적용된 지중연 속벽, 주열식 흙막이벽 (CIP벽, SCW벽)의 변형거동을 분석하였다. 해석프로그램에 Rankine의 토압(l857), Terzaghi and Peck의 토압(1967), Tschebotarioff의 토압(1973), 홍원표·윤중만의 토압(1995a)을 적용하여 흙막이벽의 수평변위를 예측하였다. 프로그램 해석결과, 흙막이벽의 수평변위량은 토압의 종류에 따라 큰 차이를 나타내고 있다. 홍원표·윤중만의 토압(I995a)을 적용하여 얻은 흙막이벽의 예측수평변위량이 실측수평변위량과 가장 유사하게 나타났다. 따라서 프로 그램 해석시 홍원표·윤중만의 경험토압(l995a)을 적용하면, Top-Down 공법이 적용된 흙막이벽의 변형거동을 비교적 정확히 예측할 수 있다. Abstract: The behaviors of a diaphragm wall and a contiguous pile wall such as CIP (Case-in-place pile) and SCW (Soil-cement wall), applied to the top-down construction method, were analyzed using the SUNEX program, which is widely used to design earth retaining walls. Four types of earth pressures, as described by Rankine (1857), Terzaghi and Peck (1967), Tchbotarioff (1973), and Hong and Yun (1995a), were applied to the analysis program to predict the lateral displacement of walls, The results show that the displacements of an earth retaining walls vary with the applied earth pressure. The predicted lateral displacement based on Hong & Yun`s (1995a) earth pressure is similar to the measured displacement. Therefore, the actual lateral displacement of an earth retaining wall, as applied to top-down construction method, can be accurately predicted by using an analysis program considering Hong and Yun`s (1995a) earth pressure.

수술실 손 소독제의 종류에 따른 균주 수의 변화

홍성윤,김정민,김소영,이수정,오은실,양서인,김화실,김남초 병원간호사회 2006 임상간호연구 Vol.11 No.2

Purpose: The present study purposed to compare the hand washing effect of 7.5% powidone-iodine, which is used in the operation room of C university hospital in Seoul, with that of Ethyl alcohol-CHG mixture recommended by the US Association of Operating Room Nurses (2002) and to adopt a more effective hand disinfectant. Method: In a quasi-experimental design, 48 medical staff who participated in operations during the period from November 2004 to February 2005 had hand washing using the two kinds of hand disinfectants: 7.5% povidone-iodine and the ethyl alcohol-CHG mixture. Their palms were swabbed and cultured just after hand washing and again after taking dff sterile gloves after the operation. The number of colonies from the two occasions were counted and compared. Result: The number of general bacillus increased significantly in the group using 7.5% povidone-iodine compared to that in the group using the ethyl alcohol-CHG mixture. The number of general bacillus increased signficantly in doctors compared to that in nurses. The factors affecting the increase of the number of general bacillus were disinfectants and medical personnel. The number of general bacillus was expected to increase 9.41 times with 7.5% povidone-iodine than with the ethyl alcohol-CHG mixture and 14.87 times in doctors than in nurses. Conclusion: This study shows that the ethyl alcogol-CHG mixture has a stronger hand disinfection effect than 7.5% povidone iodine. Thus we need to change the hand disinfectant used in operating rooms as soon as possible in order to minimize the infection of wounds resulting from operations.

한국인 선천성 난청에서 Connexin 26의 분자유전학적 분석

박홍준,박기현,송정환,정영훈,최호석 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.4

쌍각자궁에서 4회 반복유산 후 만삭 둔위 분만 1예

홍정의,김윤숙,최승도,선우재근,배동한 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.2S

..

韓國의 암발파 진동상수에 관한 연구

홍원표,엄영진,윤중만 중앙대학교 기술과학연구소 1995 기술과학연구소 논문집 Vol.25 No.-

암반지반에서 절토나 지하굴착을 실시할 때 암발파로 인해 진동과 소음이 발생하게 된다. 지반진동은 인접구조물에 손상을 주거나 인근주민에게 불쾌감을 주기 때문에 지반진동의 발생기구나 인접구조물에 영향을 미치는 매카니즘을 정확히 예측하는 것은 매우 중요하다. 따라서 본 연구의 목적은 지반진동에 대한 규준을 마련하는데 있다. 지반진동은 최대입자속도, 발파에너지, 진동원으로 부터의 거리에 영향을 받는 것으로 나타났다. 또한, 본 연구에서 산정된 진동식의 최대입자속도는 기존의 제안식보다 약간 작게 나타나고 있으나 진동원으로부터 50~100m 이내의 거리에서는 매우 유사하게 나타나고 있다. Vibration and noises are occured dut to rock blasting work for cutting and underground excavation performed in rock ground. It is very important to control the vibration produced according to rock blasting. Therefore, the main objective of this paper is to estabilish criteria of vibration to control blasting. Vibration is influnced by peck particle velocity, blasting energy, distance from vibration source and strength of rock. The peck particle velocities estimated by the vibration equations presented in this paper are lower than those estimated by existing empirical equations but both show very similar within distance from 50m to 100m.

버팀보로 지지된 흙막이벽의 거동에 관한 연구

홍원표,여규권,윤중만,조용상 중앙대학교 기술과학연구소 1997 기술과학연구소 논문집 Vol.27 No.-

버팀보 축력으로부터 산정된 측방토압은 지표면에서 굴착깊이의 17%에 해당되는 깊이까지 선형적으로 증가하다가 그 깊이 아래로부터는 일정토압분포를 보이는 사다리꼴모양의 분포를 보였다. 이 일정토압 분포부분의 토압 크기는 평균적으로 최종굴착깊이에서의 Rankine 주동토압의 58%에 해당하거나 연직상재압의 17%에 해당하였다. 또한 흙막이벽의 수평변위와 굴착깊이와의 관계로부터 흙막이구조물의 안정성을 판단할 수 있는 시공관리기준을 설정하였다. 흙막이벽의 수평변위량이 굴착깊이의 0.20%보다 작으면 흙막이벽과 굴착배면지반은 안정된 상태에 있다. 그러나 벽체의 수평변위가 굴착깊이의 0.20%보다 크게 발생하면 굴착공사의 안정성을 주의깊게 관찰해야만 하며, 필요하다면 흙막이 구조물을 보강해야만 한다. The lateral earth pressures on braced earth retaining walls, which are estimated form the measured strut force, shows a trapezoidal distribution that the earth pressure increases linearly with depth from the ground surface to 17% of the final excavation depth, and then keeps constant value. The maximum lateral earth pressure was same to 58% of Rankine's active earth pressure or 17% of the vertical overburden pressure at the final excavation depth. Also, empirical criterion is established for construction management to monitor and ensure the stability of deep excavation from the relationship between horizontal displacement of wall and excavated depth. If the horizontal displacement of wall measured from inclinometer shows less than 0.20 percent of the excavated depth, the retention wall and surrounding ground exist under stable state. When the horizontal displacement is developed more than 0.20 percent of the excavated depth, excavation works should be carefully observed and reinforced the earth retention wall, if necessary.

Burkitt림프종 환아의 증례 보고

홍현진,최병재,이제호,윤정훈,손흥규 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.2

Burkitt 림프종은 중앙아프리카 지역의 어린이 악골에서 흔하게 나타는 악성 종양으로 림프조직으로부터 발생되며 매우 빠른 성장 양상을 보인다. 임상적으로는 7∼8세 아동에 주로 호발하며 악골에 발생하는 경우 안면부 종장이 나타날 수 있으며 유지의 비정상적 동요 및 구치부 조기 맹출등이 나타날 수 있다. 방사선 소견으로는 경계가 불규칙한 방사선투과성 병소로 나타나며 조직학적으로는 종양세포들 사이에 대식세포가 분포되어 "starry-sky" appearance치 특징적인 양상이 관찰된다. 본 증례는 좌측 안면부 종창을 동반한 유구치의 심한 동요도를 주소로 내원한 3세 남환아에서 임상 및 방사선 검사와 조직학적 검사를 통해 Burkitt 림프종으로 진단하였고 항암 화학요법에 의해 치료중이며 양호한 치료 결과론 얻고 있다. Burkitt's lymphoma is a malignant tumor that commonly occurs in the jaws of children of Central Africa. It originates from the lymphatic tissue. and it shows rapid growth Clinically. It is commonly found in children between age of 3 and 8. When it is found in the jaw, facial swelling, mobility of deciduous teeth. and early eruption of posterior teeth can also be found. Upon radiographic examination, radiolucent lesions with irregular border can be observed Histologically, macrophage can be seen among tumor ce11s, and this special pattern is called "starry-sky" appearance. In this case, 3 year-old male patient came to our hospital with left facial swelling and severe mobility of deciduous molars. He was diagnosed as Burkitt's lymphoma based on clinical, radiographic, and histologlc examination. He is being treated with chemotherapy and progress seems promising.

학교 주5일제에 관한 학생과 교사의 의식 분석

홍광식,최영자,이연화,정정임,장남덕 한국초등교육학회 2002 초등교육연구 Vol.15 No.1

본 연구는 학교 주5일제에 관한 학생과 교사의 의식을 조사분석하여 학교 주5일제 실시에 대응하고자 하였다. 조사 대상자는 초·중·고 학생 1558명과 교사 1077명이었다. 연구결과, 학생들은 현재 학교생활에서 공부하는 즐거움을 알지 못하고 친구들과의 교제에서 즐거움을 찾고 있는 것으로 나타났다. 학교 주5일제 관해서는 학생과 교사 대부분이 찬성하고 있으며, 찬성 이유는 여유있는 하루, 가족과 접촉시간을 갖고 취미활동을 하며 친구와 놀 수 있기 때문이라고 하였다. 교사들은 학교 주5일제로 인한 수업시수의 문제를 감축해도 상관이 없다는 반응이 많았고, 현재의 수업시수를 확보해야 한다는 의견은 적었다. 학생과 교사 대부분은 학교 주5일제는 학생들이 다양한 체험을 할 수 있는 기회를 제공하는 체제로 인식, 긍정적인 반응을 보였다. The purpose of this study is twofold: (ⅰ) to analyze students and teachers' consciousness on the proposed Five-day-work-week School System(FSS) plan; and (ⅱ) to propose a desirable direction of school management including curriculum compatible with the (FSS) plan. This study developed as follows. For the theoretical background of this study, previous research was reviewed. For the items of the questionnaire, the Japanese Ministry of Education Survey on the FSS at school was referred to. The Subjects sampled were 1558 students and 1077 teachers, The data collected from the at elementary, secondary and high school of students and teachers were statistically analyzed by using the SPSS WIN 7.5. The following are the results of the survey. First, in order to adopt the FSS plan, schools have to develop new programs connecting home and school. It is required that school develop special programs that the local community can participate in and cooperate with. Second, most of the respondents support the FSS plan because students can have more chances to be with their family, to become familiar with nature, and to attend various activities sponsored by the local organizations. Third, to argue that it is desirable to adopt the FSS plan even though school has to reduce the minimum class hours. The reason they are against the no-school-on-saturday plan is that there are many families who cannot take care of their children on Saturdays; thus, special programs for them should be prepared before the plan is put into practice. It is also required that we develop various sports or culture events for young adolescents and make up more organizations for youth. We should have school or community facilities open to young adolescents and children whose parents are unavailable to care for them. The latter should have an easy access to those facilities. From these observations, we can conclude that it is imminent to develop various programs before we put the FSS plan into practice. Schools should cooperate fully with homes and the community.

비행청소년들의 충동성과 뇌기능에 대한 연구

이현정,신윤오,안동현,홍성도,이원태 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.5

Objectives : Recently, the number of adolescent criminals hospitalized for evaluation or treatment of mental illness is increasing. The aim of this study was to provide basic information for the evaluation and treatment of adolescent misconducts, based on their impulsivity. Methods : Barrat's impulsivity test was done to 64 adolescent criminals under age of 18 who were admitted to a Juvenile School between Oct. 1, 2003 and June 30, 2004. According to their recognizing impulsivity scores, the upper 30% group (high impulsivity group : HIG) and the lower 30% group (low impulsivity group : LIG) were selected. The two groups were compared on socio-demographic data, crime characteristics, psychiatric diagnoses, Evoked Potential Latency and Amplitude, Cognitron and IQ. Results : 1) The high impulsivity group had lower IQ than the low impulsivity group (p<0.01). 2) No difference was found in the seriousness of committed crimes, number of crimes and the age of first committed crimes. However, the high impulsivity group fended acting alone in committing crimes (p<0.05), and more frequently upeated same crimes (p<0.01). 3) Evoked potential latency was prolonged on FzN100 (p<0.05), CzN100 (p<0.05), PzN100 (p<0.01) and amplitude was increased on FzN100 (p<0.05), CzN100 (p<0.05), PzNl100 (p<0.05) in high impulsivity group. 4) High impulsivity group showed lower scores on NOCR (p<0.01), NOCYR (p<0.01), NOCNR (p<0.01) in Cognitron. PzN100 (p<0.05) latency prolongation. CzN100 latency prolongation had positive correlation with PzN100 latency prolongation (p<0.05). 5) While the misconduct was most common problem in both groups, more ADHD diagnosis was identified in the high impulsivity group. The most frequent medical problem in low impulsivity group was with diseases of internal medicine (p<0.01) and anxiety disorders (p<0.01). Conclusion : The adolescent cnminals with high impulsivity tend to have lower intelligence and commit crimes repeatedly. They are frequently diagnosed to have ADHD. When they are compared to low impulsivity group, big differences are found in prolonged evoked potential latency and increased amplitude on N100. Hence, in the treatment and rehabilitative programs for them, considering these characteristics may be helpful.