• Proceedings of the KSR Conference
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• 2006.11b
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• pp.552-557
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• 2006

Since the 20th century, the business of railway was invaded by the invention of airplanes and vehicles in the field of the transportation of passenger and commercial products, however, in the 21st century, the fervent development of a high-speed railway made possible the huge capacity of transporting passengers and commercial freight, so the railway industry is facing a new era of railway revolution. The 200 years old railway tradition includes the history of railway bridges built in areas of river, valley and metropolitan region and in that, the number of constructions of railway bridges that is composed of cable-stayed bridges is increasing as one of the most optimal bridges considering the quality of materials and the span of continuous-welded long rail. Thanks to the minimized effects of the fixed load on the stiffening girder section by delivering the fixed load which is applied to the pylon with the composition of elastic supporting-points by using cables and the effective structural system that can throughly resist extra loads in addition to fixed load, the long-extended span of a bridge becomes possible. In this structural system, the load that is applied to the stiffening girder section forms a flow pattern and in the process of these load delivery, there will be a necessity to examine the concentration of stress occurred in the cable-anchor system of the cable.

• Journal of Korean Port Research
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• v.7 no.2
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• pp.5-17
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• 1993

The decline of railway industry been a world-wide phenomenon. Recently, increased attention has therefore of railway systems has considerable impacts on the existing transport systems. Korea is expecting a era of high-speed railway and thus the need for the preexamination of such system emerges. This study is therefore concerned with the impacts on the conventional railway systems of the planned high-speed railway and its policy implication. The results revealed that the high-speed railway is almost exclusive to the conventional railway system emerges. This study is therefore concerned with the impacts on the conventional railway systems of the planned high-speed railway and its policy implication. The results revealed that the high-speed railway is almost exclusive to the conventional railway systems. The only impact is to induce some users of the conventional railway services, resulting in some excess track capacity of Kyungbu line. It dose however appear not to have any influence on the level of service for the conventional passenger services and rail freight transport. Consequently, it appears desirable to pay as much attention to the conventional railway systems as to the high-speed railway.

• Land and Housing Review
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• v.6 no.2
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• pp.61-66
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• 2015

This study is the realization of natural gas as ways to advance the South and the continental railway linking basic research was conducted on railway transport. Summary data on the Status of North Korean railway which was to have reviewed the case of LNG railway transportation in Japan and China is becoming an LNG tank containers by rail transportation is done. In the case of Korea, the stability of railway transportation through the development of LNG tank containers and rail transportation pilot project was tested. It was set up and the basic directions of freight trains transport routes and methods for rail transport 7.5 million tons of natural gas per year. TKR ~ TSR between the LNG transportation business is an existing railway south. North. Russia gas pipeline (PNG) instead of a separate project to replace the business SRX (Silk Road Express) is a symbolic project for the early realization of the Eurasian railway linking policy. This study may give greater meaning to secure the iconic railway transport route for continental transport of containers and bulk cargo (coal, ores, etc.).

• Journal of Korea Port Economic Association
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• v.35 no.2
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• pp.109-126
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• 2019

The Panmunjom Declaration adopted by the leaders of South and North Korea on April 27, 2018, has created an environment conducive for peace and cooperation in the Korean Peninsula. In the June of last year, South Korea has joined the Organization for Cooperation between Railways (OSJD). The membership of OSJD has established a solid foundation for restoring a multimodal logistics system that connects the Korean peninsula to Eurasia countries, including China and Russia. In this paper, a questionnaire survey targeting working-level experts was conducted to find the barriers in constructing multimodal logistics that efficiently connect the port-continental railways of the Korean peninsula and the Eurasian nations. Survey items were divided into five categories-border crossing procedures, technology, facilities, operation, and government support. As a result, among the most important problems of international multimodal logistics in Eurasia that need to be solved on priority include improving transshipment facilities, eliminating inspection carried out at every country for transit, simplifying documents for customs clearance, and minimizing the changes in freight rates. In conclusion, for vitalizing the connection between the Korean peninsula and the continental railways, it is necessary to develop a transshipment system to facilitate the changes in tracks at the borders by making a joint effort with the international community. Second, railway and operational systems in South Korea, North Korea, China, and Russia should be standardized. Third, international cooperation among South Korea, North Korea, China, and Russia is essential for simplifying customs clearance at borders, priority departure of domestic cargo, sharing information about the changes in freight rates, and so on. Finally, the government should come up with measures to secure the quantity of cargo required to form block trains, while developing new business models.

• Journal of the Korean Society for Railway
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• v.10 no.6
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• pp.692-700
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• 2007

A trial run of locally-developed tilting train has been in process on Chungbuk line since the test vehicle was first produced. For the system stabilization, interface verification among the systems including track, structure, catenary and signaling system, not to mention the rolling stock, is very crucial. In the area of wayside structure, the stability of track structure and train run shall be evaluated through the review of impact by increased speed by developed train on track structure. The study thus was intended to evaluate the impact on track while a tilting train is running the curve section, which is vulnerable to accelerated train speed. The analysis of tilting train test running the part of Chungbuk line and Honam line was conducted to identify the impact on existing track performance by tilting train. To identify the movement behavior of each part of track while tilting train, high speed train and traditional train (Mugunghwa and freight train) were running the existing line, wheel load, lateral wheel load, rail bending stress, vertical and lateral displacement of rail and vertical displacement of sleeper were compared and analyzed so as to evaluate the expected impact by tilting train for improving the train speed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.53-59
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• 2019

To reduce the vibrations and shocks during the cargo transportation of high value-added goods, the vibration history was measured on the truck transportation section (Asan-Uiwang) and the freight train transportation section (Uiwang-Pusan). The internal vibrations of the container were obtained by attaching acceleration sensors in three axis directions (longitudinal, lateral. and vertical directions) on the front and rear bogies. The rail vibration profile (0.29Grms) proposed in ASTM D-4169 was approximately 50% higher than the truck vibration profile (0.54Grms). The overall vibration was 16% and 33 % lower in the longitudinal and transverse directions, respectively, compared to the ASTM truck transport vibration profile. On the other hand, the vertical vibration measurement history partially exceeded the ASTM truck transport vibration profile over the range, 4 - 15Hz, and over 60Hz. The vibration measurement history of the cargo train was similar to that of the road. The longitudinal and lateral vibration history was lower than the ASTM D-4169 rail vibration profile, while the vertical history was over 30Hz.

• Journal of Korean Society of Transportation
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• v.22 no.2 s.73
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• pp.177-193
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• 2004

최근의 화물자동차파업사태 등으로 우리나라 물류체계의 경쟁력제고를 위한 여러 가지 논의가 진행되고 있다. 그 중에서도 환경친화적이며, 사회적 비용이 저렴한 철도화물의 수송분담율을 높여야 한다는 의견이 많이 나오고 있다. 우리나라 물류체계의 근본적인 문제점은 도로운송량의 증가보다 트럭의 공급과잉으로 트럭운송사업자의 수익은 매우 낮고, 철도, 해운 등 대량운송수단의 분담율이 낮아 전체적인 수송효율성이 낮은 것을 들 수 있다. 이러한 문제점의 해결은 트럭의 과잉공급을 억제하고, 제조업 물류비 중 46.5%를 점하고 있는 운송비용을 절감하는 것이 핵심적인 방안이라고 하겠다. 이에 본 논문에서는 철도화물의 활성화와 우리나라의 철도구조개혁의 성공적인 추진을 위해서 우리와 지형조건이 비슷하고, 1987년에 철도민영화를 시행하여 현재 16년이 경과한 일본철도화물의 현황을 분석하여, 현재까지의 문제점을 밝히고 또한 우리나라의 철도화물수송정책에 시사하는 바를 정리해 보았다. 1987년 민영화 이후 일본철도화물수송현황을 보면 영업거리, 화차대수를 포함한 수송능력 감소로 수송량은 감소하였으나, 화물수송의 장거리와 추세와 컨테이너수송량의 증가, 인력감축으로 영업성적은 전반적으로 향상되고 있다. 문제점으로는 경영면에서는 낮은 생산성 그리고 노후장비 등으로 인한 높은 설비투자비지출, 선로사용료 등의 부담 등이 지적되었다. 운영상에서는 현재 선로를 소유하지 못하여 네트워크가 부족하여 자유로운 열차편성이 어렵고, 포워더 기능이 없어 현재 전체물량의 85%를 점하는 소운송구간에서 다른 운송주체간의 수송으로 일관수송서비스에 어려움이 있으며, 직접적인 영업을 하지 못하여, 새로운 수요창출에 어려움이 있다. 이러한 문제점의 해결책으로는 먼저 정부의 인프라에 명확한 책임분담과 이에 따른 지원이 필요하다. 이와 같은 철도화물활성화의 정책수립필요성의 배경에는 철도화물수송이 효율성과 환경친화성, 높은 안전성 등 사회적 비용을 감소시키는 장점을 가지고 때문이다. 철도화물운송회사도 현재의 수송기능과 함께 포워더로서의 기능을 가져야 할 것이며, 운임인하노력과 속도향상을 위한 노력을 계속하여야 할 것이다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.609-617
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• 2017

Railways are one of the safest and most important transportation systems in the world. On the other hand, due to the increasing complexity of the railway system and the running distance of rail vehicles, railway accidents occur continuously every year. In particular, in the case of high-speed trains and freight trains, if the function of the axle bearing is lost due to abnormal overheating of the axle box bearing, the load on the axle becomes uneven. Therefore, abnormal overheating in the train axle box bearings can cause serious accidents or derailments. For this purpose, a Hot Box Detector (HBD) was installed in the track side of a high speed line to detect abnormal overheating. This paper proposes an EWMA technique-based axle temperature monitoring method to detect abnormal overheating quickly and efficiently. A statistical design of the proposed method was also performed. The proposed method has better performance compared to the current method in the case of abnormal overheating and the performance is improved by approximately 170% at the maximum.

• Journal of the Korean Society for Railway
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• v.10 no.6
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• pp.633-639
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• 2007

This study proposes an optimal condition to recognize a train using RFID. In order to recognize a moving train, bandwidth, an angle of antenna and the location of a tag should be considered. In this study, a field test was conducted using two different bandwidths (900MHz and 2.45GHz), four angles of antenna(0, 30, 45, and $60^{\circ}$), different velocities (10, 30 and 50km), and three different locations of tags. The field test verified the optimal condition for recognition of a train, The present study convinced that location detection and tracking of rail freight can be monitored in real time. The present technology can be applied to railway signals including detecting and tracking such as EURO Balis.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.2303-2315
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• 2008

Finally, Musan-Bongdong section in Kyeong-Ui corridor opened on 11. DEC.2007, which is a historical event, because this connection means the restoration of 56 yrs' disconnection since 1951 and also starting point launching to connect china, Mongolia, Russia for continental railway logistic infrastructure. This is also one of master plans about the northern line in TAR, carried out by UNESCAP, so this study will touch up each country's railway status and the next tasks related with trans-continental railway such as North Korea, Russia, China. Also, this study reveal a mid-long term development strategy to improve the North Korea railroad for a continent rail link and international railroad transportation between China and Russia, and also checks the way of confrontation to the domestic infrastructure for the activation of the continent railway and the north and south, investigates concretely how to establish TAR northern part routes as soon as possible.