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직접 PC슬래브설치를 통한 철도지하횡단 공법의 적용 연구
민경주(Min Kyung-Ju),이방우(Lee Bang-Woo),박병룡(Park Byung-Yong) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Existing grade crossings between railway and roadway area gradually changed to grade separation systems by the law. In the case of new roadway construction which crosses railways it shall be grade separation system in principle. With the railway underground crossing method many practices have been developed which can minimize rail displacements and avoid rail release. With these methods the effects to the train can be reduced. The underground crossing methods can be identified as open-cut methods and non open-cut methods. The open-cut methods include temporary support methods and special rail construction methods. Also the non open-cut methods includes pipe roof methods front jacking methods messer shield methods NTR methods and JES methods. Among these the most suitable method is applied considering safety economy class of each rail system (train passing frequency and velocity) etc. In the non open-cut methods the cost and duration shall be increased to keep existing rail system during construction. In the open-cut methods which use plate girders the rail speed shall be restricted due to the displacement and vibration of the girder. In this study new grade separation methods were developed. With this method the safety during construction can be increased. This method refines temporary support methods but pc slab girder with huge stiffness is applied instead of plate girders. With this method the rail displacement can be reduced and higher safety can be obtained during construction. Also construction cost and duration can be minimized because the temporary work and the overburden soil depth can be reduced.
능동제어 콘크리트 도상 복원공법(ACBR) 개발과정 및 적용사례
민지홍(Ji Hong Min),이방우(Bang Woo Lee),배석복(Seok Bok Bae),박용걸(Young Gul Park) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.5
본 연구는 철도노반 침하로 인한 콘크리트 도상의 복원을 위한 능동제어 콘크리트 도상 복원공법(ACBR)을 개발하고, 실대형실험, 기존선 시험부설, 고속철도 노반복원 선시공을 거처 고속철도 운행선상 복원공사를 실시하였다. 이러한 일련의 기술개발과정을 통하여 경부고속철도 선로에서 현재 최대 침하된 비교적 긴 60m 복선선로 침하구간에서 능동제어시스템으로 동시인상에 의한 복원작업을 수행할 수 있었다. 본 기술은 고속철도 300km/h 운행선로에서 열차서행 없이 100m 선로를 동시 인상하여 복원하는 기술을 개발에 관한 내용이며, 이는 궤도해체복원공정, 인상공정 및 충전공정 등을 동시에 진행하는 중복공정 기술 개발이 포함된다. In this study, the ACBR (Active Control Concrete Bed Restoration) methods were developed to restore concrete rail bed that was settled due to the rail bed ground settlements. To verify the usefulness of the methods, full-scale model test, pilot construction for existing rail lines, pre-construction for high-speed rail bed were performed and finally actual construction was performed to the in-use high-speed rail. Based on these technical achievements, the most critically settled locations at the existing 60m double track settled location can be successfully restored. This method can be applied 100m-long railway under the 300 km/h speed service line without any speed down. This method can be applied rail removal and restore construction, rail jack-up construction and injection construction.
박준명(Jun-Myung Park),이방우(Bang-Woo Lee),박선규(Sun-Kyu Park),이종득(Jong-deuk Lee) 한국철도학회 2003 철도저널 Vol.6 No.3
Transportation by railroad is superior to other transport in a mass transport, stability, rapid transit, delightfulness and low-pollution etc. But, it need to ensure a track stability that supports the train-load for high-speed in transportation by railroad. Ballast resistance force resists against the buckling of track taking a rail-tie's place. So, it plays an important role in a careful train-service. So, in this papers, we forced on measuring and theorizing about the Ballast Resistance Force that play a key role in track stability and high-speed. And we studied the mechanical property. Finally, we suggested the method of securing Ballast Resistance Force and the report for a careful train-service in high-speed.
민경주(Kyung Ju Min),이성욱(Seong Wook Lee),이방우(Bang Woo Lee) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5
철도 레일체결구의 상향력 및 수직력 거동에 관한 연구로 기존의 안전성검토는 단위 탄성적해석 결과을 중첩법에 의한 단순 결합에 의한 안정성 해석이였다. 그러나 레일체결구는 체결구 스프링과 레일패드 스프링의 상향력과 레일패드의 하향력의 비선형적 거동과는 차이가 있다. 본 연구는 레일체결구의 물리적 거동에 대해 분석하고 각각의 해석결과에 대하여 비교 및 분석하였다. 탄성해석은 각각의 거동에 대하여 해석하고 이들을 물리적으로 합산하여 체결력을 산정하는 것이나 이는 하중의 중복에 대한 확률적 고려가 반영되지 않은 것이므로 실제 안전성과는 차이가 있는 것이며, 체결구의 저강도 스프링에 의한 상향력과 패드의 고강성 비선형스프링에 의한 하향력을 동일시하였기 때문에 실제거동과는 차이가 많음을 알 수 있었다. The stability analysis for the uplift and vertical force on the railway anchoring system has been performed based on superposition methods that would combine unit elastic analysis results. However, in reality, the nonlinear behaviors between uplift and downward forces at the rail spring and rail pads are not identical. In this study, the physical behavior of rail anchoring system and the test results were reviewed. In the elastic analysis, each unit behavior is analyzed and these results would be combined to calculated the anchoring force. In this study, it was found that these results would not simulate the real behavior mainly because the probability effects due to the load accumulations were not considered and unreasonable assumptions, that the difference between rail anchoring system uplift based on low stiffness spring and downward force based on high stiffness non-linear spring was not considered, were employed.