Railroad, a superior mode of public transportation provides safe, efficient, speedy, comfortable and economical service, has fundamentally different characteristics from airplanes, ships and cars. Among the unique characteristics of a railroad is the fact that it operates on fixed track with multipl...
Railroad, a superior mode of public transportation provides safe, efficient, speedy, comfortable and economical service, has fundamentally different characteristics from airplanes, ships and cars. Among the unique characteristics of a railroad is the fact that it operates on fixed track with multiple car trains. The subway system was first selected as the best solution to difficult automobile traffic conditions and environmental problems. Seoul subway no.1line (Jongno line) was opened for service on August 15, 1974. Seoul city has completed and now operates eight subway lines (286.7km) since 1974. At present the subways operate in Busan, Daegu and Incheon city, and are under construction in Gwangju and Daejeon city. The power source for subway trains has been electricity since 1896, and power supply systems are the third rail type and/or the catenary system. The typical catenary system is the rigid bar type. R-bar and T-bar are used in the rigid bar type of catenary system, and the two types of R-bar and T-bar are uesd in Korea also. R-bar is used only for AC 25kV power supply and T-bar for DC 1,500V. From 30 years of subway experience I would like to suggest the most economic catenary system to ensure of safety, reliability and expediency for the railway lines to be constructed and the forthcoming replacement due to the life cycle after studying and analysing the characteristics, advantages and disadvantages of R-bar and T-bar.
Railroad, a superior mode of public transportation provides safe, efficient, speedy, comfortable and economical service, has fundamentally different characteristics from airplanes, ships and cars. Among the unique characteristics of a railroad is the fact that it operates on fixed track with multiple car trains. The subway system was first selected as the best solution to difficult automobile traffic conditions and environmental problems. Seoul subway no.1line (Jongno line) was opened for service on August 15, 1974. Seoul city has completed and now operates eight subway lines (286.7km) since 1974. At present the subways operate in Busan, Daegu and Incheon city, and are under construction in Gwangju and Daejeon city. The power source for subway trains has been electricity since 1896, and power supply systems are the third rail type and/or the catenary system. The typical catenary system is the rigid bar type. R-bar and T-bar are used in the rigid bar type of catenary system, and the two types of R-bar and T-bar are uesd in Korea also. R-bar is used only for AC 25kV power supply and T-bar for DC 1,500V. From 30 years of subway experience I would like to suggest the most economic catenary system to ensure of safety, reliability and expediency for the railway lines to be constructed and the forthcoming replacement due to the life cycle after studying and analysing the characteristics, advantages and disadvantages of R-bar and T-bar.
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문제 정의
강체가선방식에는 R-Bar와 T-Bar가 대표적으로 사용되고 있으며, 국내에도 이 두 가지 방식이 채택되고 있으나, R-Bar는 국철 교류 25kV 급전방식에만 사용되고 있고, T-Bar는 직류 1, 500V 급전방식에만 사용되고 있다. 지하철 30년의 역사를 갖고 있는 지금 R-Bar와 T-Bar의 장단점과 특성을 연구분석하여 앞으로 건설하는 노선과 Life Cycle(유효수명)이 도래되어 교체할 때 안전성, 신뢰성, 편리성이 확보되고 가장 경제적인 가선 시스템을 제시하고자 한다.
가설 설정
2. R-Bar가 국산화되면 건설비 단가는 R-Bar가 더욱 유리해질 것임.
3. 전차선 교체비(인건비 기준)는 R-Bar가 더욱 유리해질 것임.
제안 방법
본 절에서는 가공전차선방식과의 특징을 비교분석 하였다.
대상 데이터
따라서 오늘날 대도시 교통난과 환경문제 해소를 위한 대책 중상 책으로 "지하철" 을 첫째로 선택하고 있다. 1974년 8월 15일 수도권 전철 개통시 서울지하철 1호선(종로선)도 동시에 개통되었다. 그로부터 30년이 지난 지금 서울시는 8호선까지 286.
성능/효과
4. T-Bar 전차선 교체 작업시 1조의 작업량이 1일 평균 60m(l,560m/26일)로 1 section(200m)을 3~4회 나누어 작업해야 하므로 전차선로 품질 및 기능 유지에 문제가 있음.
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