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동재하시험에 의한 모래자갈층에 근입된 매입말뚝의 지지력 산정
최기철(Choi ki-Chul),문유호(Moon Yu-Ho),오원근(Oh Won-Keun),천병식(Chun Byung-Sik) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
This study results of performed field load test in order to estimate the best pile length assessment and allowable bearing capacity of the pile foundation. End of initial driving(EOID) and restrike of pile dynamic loading tests were performed to calculate allowable bearing capacity of the experimental pile side and results were compared with the allowable bearing capacity estimated by theory. The results of allowable bearing capacity by EOID test is 1.08~1.21 in the range of compared to the capacity calculated by the Structure Foundation Design Criterion. Allowable bearing Capacity by restrike of pile dynamic loading test is 1.32~1.48 in the range of compared to the Structure Foundation Design Criterion. The Foundation Design Criterion underestimated the pile capacity. If the bearing capacity calculated by Structure Foundation Design Criterion is 100, EOID of pile dynamic loading test is 116, restrike of pile dynamic loading test is 138 for 20m pile used in this experimental.
PBD공법이 적용된 대심도 연약지반에 대한 압밀분석해에 관한 연구
최기철 ( Choi¸ Ki-chul ),오원근 ( Oh¸ Won-keun ),천병식 ( Chun¸ Byung-sik ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
It is very important to determine the consolidation rate of ground, depending on the progress of time in applying vertical drain method, so that various consolidation analysis solutions are proposed for forecasting of the consolidation rate. The consolidation rate measured in the actual field, however, has a considerable difference from the value which was obtained by the interpretation of vertical drain consolidation. This study was assessed the applicability and validity of each consolidation analysis solution by comparing and analyzing the degree of consolidation actually measured in the field and the degree of consolidation based on the theoretical equation for the analysis of the consolidation of Hansbo, Onoue, Zeng&Xie used as the consolidation analysis solution before the start of construction, on the basis of the site measurement data and ground survey data as to the deep soft ground in Busan area which applies PBD method.
PBD공법이 적용된 대심도 연약지반에 대한 압밀분석해에 관한 연구
최기철(Choi Ki-Chul),오원근(Oh Won-Keun),천병식(Chun Byung-Sik) 한국구조물진단유지관리학회 2007 한국구조물진단학회 학술발표회논문집 Vol.11 No.1
It is very important to determine the consolidation rate of ground, depending on the progress of time in applying vertical drain method, so that various consolidation analysis solutions are proposed for forecasting of the consolidation rate. The consolidation rate measured in the actual field, however, has a considerable difference from the value which was obtained by the interpretation of vertical drain consolidation. This study was assessed the applicability and validity of each consolidation analysis solution by comparing and analyzing the degree of consolidation actually measured in the field and the degree of consolidation based on the theoretical equation for the analysis of the consolidation of Hansbo, Onoue, Zeng&Xie used as the consolidation analysis solution before the start of construction. on the basis of the site measurement data and ground survey data as to the deep soft ground in Busan area which applies PBD method.
이연경 ( Youn Kyoung Lee ),박병석 ( Byoung Seok Park ),정택균 ( Taek Kyun Jeong ),정균호 ( Gyun Ho Jeong ),마성권 ( Seong Kwon Ma ),김수완 ( Soo Wan Kim ),김남호 ( Nam Ho Kim ),최기철 ( Ki Chun Choi ) 대한내과학회 2003 대한내과학회지 Vol.64 No.2
목적: 당뇨병과 신기능이 저하된 남자환자에서 발기부전은 흔하게 발생한다고 알려져 있다. 이 중 당뇨병 신증으로 치료 중인 2형 당뇨병 환자를 대상으로 발기부전(erectile dysfunction, ED)의 유병률과 이와 관련된 위험인자들을 알아보고자 이 연구를 시행하였다. 방법: 2001년 7월부터 2002년 2월까지 전남대학교 병원에 미세 알부민뇨나 현성 신증으로 내원한 환자 및 현재 투석 중인 2형 당뇨병을 가지고 있는 남성 환자 106명을 대상으 Background: Erectile dysfunction (ED) is prevalent among patients with diabetes mellitus and impaired renal function. To estimate the prevalence of ED in diabetic nephropathy and to identify its risk factors, we carried out a survey of patients with diabe
김현수,김남호,최기철,강정채,이성철,이태희,정익주,정민영,강영준,김수완,정권,김형준,정택균,나명윤,정균호,바종춘 대한신장학회 1998 Kidney Research and Clinical Practice Vol.17 No.5
We measured serum lipoprotein(a) [Lp(a)] concentrations in 304 uremic patients treated on predialysis, hemodialysis (HD) and continuous ambulatory peritoneal dialysis (CAPD), and compared them with those in 43 normal controls. The mean values were 46.1mg/dl in predialysis, 35.7mg/dl in HD, 54.7mg/dl in CAPD patients and 17.0mg/dl in controls, respectively. Serum Lp(a) levels were elevated both in the predialysis patients (P<0.001) and in the CAPD patients (P<0.001) compared with those in controls, and were also elevated in the CAPD patients (P<0.01) compared with HD patients. Serum Lp (a) levels tended to be higher in HD patients compared with controls, although these differences did not reach statistical significance. We observed statistically significant positive correlations of Lp(a) to serum levels of total cholesterol (TC) (r=0.279, P<0.01), LDL-cholesterol (r=0.335, P<0.01), and Apo(B) (r=0.352, P<0.01), and significant negative correlation of Lp(a) to serum level of albumin (r=-0.278, P<0.01) in 304 CRF patients. CAPD patients had a more atherogenic lipoprotein profile than did HD patients: besides significantly higher Lp(a) levels (P<0.01), total (P<0.001) and LDL (P<0.001) cholesterol, triglycerides (P<0.05), and apo (B)(P<0.001) were significantly elevated in comparison to HD patients. The marked elevation of serum Lp(a) in patients on CAPD may be due to increased hepatic synthesis as a consequence of the substantial amounts of plasma proteins lost in the dialysate. The increased serum concentrations of Lp(a) may contribute to the high risk for atherosclerosis in end stage renal disease, especially in patients treated by CAPD.