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윤태국,이유석,한자중 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
This study carried out evaluation of ASSM(American Steel Support Method) tunnel lining which was defective in construction work. The site of evaluation was cross section between main road tunnel and connecting tunnel. There were two defective phenomena which were cracks at the crown and right arch and non-lining concrete by 6.5m×0.6m at left arch. So we had done various inspection as G.P.R.(Ground Penetration Radar), test of concrete strength and NDT(Non-Destruction Test). Through the that tests we did the numerical analysis about the ground and finite elements method about concrete lining. By the analyses and deep inspection we concluded the tunnel would be safe from defect and the cracks was non-structural one
윤태국,이유석,한자중 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This study carried out evaluation of ASSM(American Steel Support Method) tunnel lining which was defective in construction work. The site of evaluation was cross section between main road tunnel and connecting tunnel. There were two defective phenomena which were cracks at the crown and right arch and non-lining concrete by 6.5m×0.6m at left arch. So we had done various inspection as G.P.R.(Ground Penetration Radar). test of concrete strength and NDT(Non-Destruction Test). Through the that tests we did the numerical analysis about the ground and finite elements method about concrete lining. By the analyses and deep inspection we concluded the tunnel would be safe from defect and the cracks was non-structural one
박인준,곽창원,박준범,한자중,Park,Innjoon,Kwak,Changwon,Park,Junboum,Han,Jajung 한국방재학회 2013 한국방재학회논문집 Vol.13 No.5
최근 늘어나고 있는 폐기물량에 따라 폐기물 매립장의 건설이 증가하고 있으며, 매립장 내 폐기물의 격리, 보호 및 환경오염방지를 위하여 토목섬유가 널리 활용되고 있다. 토목섬유는 주변의 흙과 접촉면을 형성하여 폐기물 매립장의 전단 거동에 영향을 미치게 된다. 폐기물 침출수에 포함된 화학적 요소는 이러한 접촉면 거동에 중요한 영향을 미치며, 지진과 같은 동적하중 또한 접촉면 거동에 미치는 화학적 영향을 가속화시킬 수 있다. 따라서 본 연구에서는 화학적 영향을 고려한 접촉면 전단강도 감소효과를 반영하여 수치해석을 수행하였다. 반복 단순전단시험 결과를 바탕으로 수치해석을 수행한 결과, 접촉면 전단강도 감소를 미 고려시 폐기물 매립장의 동적 안정성을 과대평가할 수 있다고 판단된다. The number of the waste landfill site increases continuously in recent years. Various types of geosynthetics have been utilized in the waste landfill site for encapsulating, isolating, protecting, and so on. Geosynthetics compose the interface with soil and affect the shear behaviors of waste landfill system. The chemical aggressors in the leachate also play a critical role in the interface and it is known that the dynamic loading is able to accelerate manifestation of the effects of chemical attack. In this research, numerical analysis was conducted considering shear stress degradation in the geosynthetic-soil interface due to dynamic load with chemical effect. Cyclic simple shear test results was reviewed and applied to the numerical modeling as well. Consequently, the stability of waste landfill site could be overestimated without considering the shear stress degradation of interface.
장기수 ( Jang Gi Soo ),김영호 ( Kim Young Ho ),황인백 ( Hwang In Baek ),한자중 ( Han Ja Jung ),안상로 ( Ahn Sang Ro ),이송 ( Lee Song ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
It is generally stated that the state evaluation of construction facilities is to measure a step of the whole state included in the aging and defects in facilities. This study suggested a matter of improvement after going over an application on new standard of the state evaluation, which is applied for the tunnels. Consequently, it is conclude that the length of a span should be noticed in public to assess objective evaluation. According to this study, 30m for analyzed span is appropriate and accordant to the previous standard of evaluation.