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이재영(Jae-Young Lee),조수익(Su-Ik Jo),배준형(Joon-Hyung Bae),정우성(Woo-Sung Jung),이철(Cheol Lee) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Since the efforts in transportation for counteracting Climate Change have been enhanced, it is necessary to reduce GHG emissions from railroad construction. The aim of this study was to develop the calculation method of GHG emissions at the step of railroad construction. Main emission source was the energy consumption from the used heavy equipments. Firstly, GHG inventory including equipments list, energy consumption, and work load was established with the detailed process using standard for the unit cost of construction. Also, the energy consumption of heavy equipments during track construction at A site was collected to compare with the field data. As a result, the GHG emissions between the estimated and the field were a little different, which was caused by the inaccurate field data. Therefore, it is important to manage data efficiently for the calculation of GHG emissions in the field of railroad construction.
강인석(Leen-seok Kang),조수익(Jo Su-Ik),이명석(Lee Myung-Seok),박진정(Jin-Jung Park) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
철도시설과 같은 광역지역 공사 현장에서는 다양한 요인을 갖는 공종별 위험요소가 존재하고 있으나, 현장에서 이를 효율적으로 관리할 수 있는 방안의 수립이 미흡한 실정이다. 따라서 본 연구에서는 철도 관련 실무자들을 대상으로 설문조사를 실시하여 공종별 위험 요인을 도출한다. 이를 통해 RBS(Risk Breakdown Structure)를 구축하고 제시된 RBS에 의한 위험도를 산정한 후 이를 기반으로 VR시스템과의 연동 및 위험관리 체계 구축 방법론을 제시하고 있다. 따라서 현장에서의 주요 공종별 Risk 위험도를 가상환경에서 구현이 가능하므로 위험요인에 따른 시설의 직관적 파악이 가능하다. 또한 시공자들은 나타난 시각화 정보에 의한 Risk에 대비해 효율적인 공사 관리를 이행할 수 있을 것으로 기대된다.
정관동(Kwan-Dong Jung),엄기영(Ki-Young Eum),최찬용(Chan-Yong Choi),조수익(Su-Ik Jo),황인환(Hwan-In Hwang) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
The method in a bid to make better use of limited urban space amidst increasingly expanding urban area have been attempted in various ways. Efficient using underground space is one of the examples. The pipe roof and excavation for underground crossing implemented in this study was the part of evaluation of such attempt. However, the pipe roof method for underground crossing may cause the ground surface to be uplifted or settled down, having effect on structure above the ground. Thus in this study, a laboratory model test designed to evaluate the effect on surface during implementing pipe roof and excavation was carried out. The ground displacement during pipe roof advancing and excavation is usually occurred in a radial shape but as the study focused on trackbed, the evaluation included ground settlement only. Thus, appropriately-scaled model was selected considering domestic geological characteristics and operation characteristics of traditional and high-speed rail trains and the qualitative evaluation of displacement was carried out with a certain ground loss depending on excavation after categorizing trackbed settlement pattern depending on depth of top soil.
김성일(Kim Sung-Il),김현민(Kim Hyun-Min),조수익(Jo Su-Ik),이명석(Lee Myung-Suk) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
At present, design loads of railway are divided into common railway and high speed railway separately. LS-22 which is based on American railway standards represnets common railway and HL25 which is based on Eurocode represents high speed railway. Although, the design load is the starting point for design of railway, any research for developing design load does not exsit at all. However, Europe and Japan develops the deisn load consistently with advanced design standards. Recently in Europe, deterministic, probabilistic and cost approaches are investigated for developing new design load which is called LM2000. In the present paper, as a step for developing new design load for Korean railway, deterministic processes will be introduced. Trains which are serviced now and future will be analyzed and a necessity for new design load will be presented quantitatively.
엄기영(Eum Ki-Young),정관동(Jung Kwan-Dong),천정연(Cheon Jeong-Yeon),조수익(Jo Su-Ik),이종태(Lee Jong-Tae) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The construction of underpass work is variously affecting on the rail roadbed and underground structure resulting in greatly influencing the safe operation of train. Owing to this many non-open type underpass methods passing under the railroad structure are being actually proposed. Accordingly the ground movement characteristics and rail roadbed affection shall be considered in planning, designing, and executing the underpass work in order to minimize the influence on the safety security for train operation and its surrounding. The analysis on the cause for ground movement is required in order to evaluate the influence of rail roadbed followed by the non-open type method, and the relationship with the soil amount removed underground and the upper and surrounding deformation distribution is required to be established. Accordingly, in this study the optimum miniature model is selected considering the national geological condition and the operational charateristics of high speed and general trains and the settlement and elevated pattern of the upper ground followed by the typical ground excavation type is attempted to be evaluated.
콘크리트 슬래브궤도에서 보상 커패시터의 위치 및 전기용량에 대한 연구
김민석(Kim Min-Seok),이상혁(Lee Sang-Hyeok),고준석(Ko Jun-Seog),이종우(Lee Jong-Woo),조수익(JO Su-Ik),유진영(Yu JIn-Young) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
Impedance of rails is increased by the magnetic coupling between rails and reinforcing bars in the concrete slab track. Currently, the current of track circuit has been compensated by installing the compensation capacitors on track circuit because of increasing the impedance of rails. In case of a rapid transit railway, the compensation capacitors are installed every 20[m] to compensate the current of track circuit in the concrete slab track. Because the interval of one block for a rapid transit railway is as long as 1500[m], the compensation capacitors are installed about the number of 70~75 on track circuit. However, in case the compensation capacitors are broken over the number of three, it is a problem that the amplitude of current is under standard amplitude of current which is 0.8[A]. In this paper, it was suggested installing a compensation capacitor by using resonance phenomenon on the concrete slab track. We represent the electrical model of track circuit and the four terminal network, calculate the parameters demanded for the electrical model in the concrete slab track. Also, we computed the position and capacitance of the compensation capacitor about 2040[㎐], 2400[㎐], 2760[㎐], 3120[㎐] which currently is the track circuit frequency in the Gyeongbu rapid transit railway and demonstrated the validity of it, using the Matlab and PSpice program.
박성재(Sung-Jae Park),마창남(Chang-Nam Ma),박명균(Myung-Gyun Park),이두화(Du-Hwa Lee),조수익(Su-Ik Jo) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Recently the construction of railway sections passing the central area of cities and stations under railway lines are increasing, and then it is urgently required to take the countermeasures against the railway vibration and the second-phase noise radiated from it. The most efficient countermeasure, out of technologies developed up to now, is the floating slab track which is the track system isolated from the sub-structure by springs. In other countries, the source technologies for anti-vibration design and vibration isolator - one of key components - have been developed and many installation experiences have been accumulated. However, in Korea, since the system design technology and technologies for key components are not yet developed, the foreign system are being introduced without any adjustment, and the key component, vibration isolator, depends on imports. In this study, floating slab was divided into three spans, kdynamic use by examining reactions and member forces was to ensure safety.
박성재 ( Park Seung Jae ),마창남 ( Ma Chang Nam ),박명균 ( Park Myoung Gyun ),이두화 ( Lee Du Wha ),조수익 ( Jo Su Ik ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
Recently the construction of railway sections passing the central area of cities and stations under railway lines are increasing, and then it is urgently required to take the countermeasures against the railway vibration and the second-phase noise radiated from it. The most efficient countermeasure, out of technologies developed up to now, is the floating slab track which is the track system isolated from the sub-structure by springs. In other countries, the source technologies for anti-vibration design and vibration isolator - one of key components - have been developed and many installation experiences have been accumulated. However, in Korea, since the system design technology and technologies for key components are not yet developed, the foreign system are being introduced without any adjustment, and the key component, vibration isolator, depends on imports. Thus, the rate of technology self-support is very low. Therefore, to achieve the competitiveness in domestic and overseas markets, the core technologies of floating slab track and its components should be developed immediately.