• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.6 no.3
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• pp.33-44
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• 2007

Prohibition of lane changes in bridges and tunnels have been many problems in throughputs of expressways caused by heavy vehicles and slow-moving traffics. Nevertheless, those are constructed actively by the general trends, which are preservation of environment and ecosystem are more important, because mountainous districts are about 70% across the whole extent of Korea. In this paper, the proper design standards for permission of lane changes in bridges and tunnels classified into structure, safe, and driver's conveniences are suggested as follows. 1. Right shoulder should have more than 2.5m in bridges and tunnels. 2. Sufficient equipments of guidance like as directional signs, fingerposts, variable message signs, and markings should be established to smooth and safe lane changes of drivers. 3. Snow melting systems should be established in bridges worried about freezing. 4. Tunnels must be not only satisfied standards for prevention of disasters (2004.11) and lighting rules (KSA 3703), but also established anti-freezing facilities in entrance and exit. 5. The drivers should have honed on their car lights.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.29 no.1
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• pp.433-438
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• 2005

This study was carried out to analyze the effect of the variation of a wind speed on the stability of a container crane. The wind load according to 'The Requirement of Port Facilities and Equipments / Specification for the design of crane structures (KS A 1627)' and 'Load Criteria of Structures' enacted by the ministry of construction & transportation was evaluated. And the uplift forces of a container crane under this wind load were calculated by analyzing reaction forces at each supporting point and compared with each other. The analytic model was a container crane with uplift capacity of 50ton which was widely used in port.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.623-628
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• 2007

Metro Subway System is widely known as the leader of public transportation in a metropolitan area. The signal interlocking is one of the most important organs that plays a major role in the system. By improving the quality of signal interlocking on of the traffic system and keeping its maintenance on a high level will not only repair the current state, but it will also let the PLC(Programmable Logic Controller). The Non-Vital relay of No. 3, 4 Line are the most one of the unstable system, device, which underwent a process of fine manufacture establishment and a close examination, obtained as a new device. Utilizing the equipment with cautious preservation on the system will enhance the current state of the signal device. Especially, the test for improvement and development based upon the technique that decreases the frequency of defect produced will further precipitate its efficiency. With authorization of imposing the newly made equipment will bring improvement to the signal technology and to the industry at largest extent.

• Tunnel and Underground Space
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• v.27 no.6
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• pp.387-392
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• 2017

Recently, road cave-ins, also referred to as ground sinking, have become a problem in urban environments. Public utility facilities such as sewage pipelines, communications pipes, gas pipes, power cables, and other types of underground structures are installed below the roads. It was reported that cave-ins are caused by the aging and lack of proper maintenance of underground facilities, as well as by construction problems. A road cave-in is first initiated by the formation of cavities typically induced by the breakage of underground pipelines. The cavities then grow and reach the base of the pavement. The traffic load applied at the surface of the roads causes an abrupt plastic deformation. This type of accident can be considered as a type of disaster. A road cave-in can threaten both human safety and the economy. It may even result in the loss of human life. In the city of Seoul, efforts to prevent damage before cave-ins occur have been prioritized, through a method of discovering and repairing joints through the 3D GPR survey.

• Journal of Korean Society for Geospatial Information Science
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• v.19 no.3
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• pp.91-98
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• 2011

Road signs are part of the traffic facilities intended to guide drivers to their destinations in a safe and comfortable manner. Due to the creation of new routes, changes to the old routes, and the deterioration of road signs, road signs do require efforts to do ongoing field investigations and put the results in a database. The purpose of this study was to propose methodologies to do field investigations and build a database for road signs efficiently. For that purpose, a mobile mapping system was designed for field investigations. The designed mobile mapping system was comprised of three cameras to produce image information about road signs, GPS/IMU/DMI to obtain information about the position and attitude of a vehicle, and a laser scanner to generate information about the locations of road signs and routes. Also proposed in the study was a procedure to automatically detect the areas of road signs in the road signs images and recognize their characters.

• Journal of the Korean Geosynthetics Society
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• v.2 no.2
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• pp.25-31
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• 2003

Most recently, environmental problems arise from management waste tires by increasing number of automobiles. Waste tires are not compressible and not easy for degradation in landfill. Even if it were landfill, it is difficult to treat. Total amount of waste tires is about 20 million per year and the collection is 68.6% in this country. Structure of slope stability using waste tire blocks filled with concrete increases durability, reduce construction period, and it can be utilized as an example. Therefore, it reduces the volume of waste and recycles waste. Also, it prevents the air pollution due to the incineration and creates economic value.

• Journal of the Korea institute for structural maintenance and inspection
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• v.21 no.3
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• pp.60-68
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• 2017

Since the bridge is the main facility of the road that is the core of the civil infrastructure, the bridge is constructed to ensure stability and serviceability during the traffic use. In order to secure the safety of bridges, evaluating the integrity of bridges at present is an important task in the maintenance work of bridges. In general, to evaluate the load carrying capacity of bridges, it is possible to confirm the superimposed behavior and symmetric behavior of bridges by estimating the lateral load distribution factor of the bridges through vehicle loading tests. However, in order to measure the lateral load distribution factor of a commonly used bridge, a static loading test is performed. There is a difficulty in traffic control. Therefore, in this study, the static displacement component of the bridge measured in the dynamic loading test and the ambient vibration test was extracted by using empirical mode decomposition technique. The lateral load distribution was estimated using the extracted static displacement component and compared with the lateral load distribution factor measured in the static loading test.

• Journal of the Korean Society of Hazard Mitigation
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• v.9 no.1
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• pp.91-97
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• 2009

Hazardous material (HazMat) is the material or substance that poses an unreasonable risk to human safety and health, and to property when transported in gases, solids, and liquids of all sizes. When HazMats are improperly released, they have potential to harm humans, property, or the environment to be considered hazardous, resulting in human-caused disasters. As the Korean economy has advanced, the use of HazMats has increased. And, the total number and the impacts of HazMat incidents have grown up. It increases the risk of HazMat incidents. When many goods of HazMats are transported from supply points to demand places, it is important to know what the types and characteristics of HazMat incidents are in terms of disaster management. The objectives of this research are: (1) to investigate types and characteristics of HazMats that generate HazMat incidents in Korea, and (2) to analyze time-series trends of HazMat incidents in terms of facilities and/or transportation. Statistical analysis methods including frequency analysis or analysis of category data are applied to examine the significance of difference in HazMat incidents.

• Journal of the Korea institute for structural maintenance and inspection
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• v.14 no.1
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• pp.117-124
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• 2010

Different to other social infrastructures, bridge elements or bridges can be damaged or collapsed and this may cause death toll and severe social and economical damage, bridges should be managed to maintain a safety level. Diverse strengthening methods is developed to improve a deteriorated bridge performance up to original design level. But rational decision-making process and methodologies to select a optimum strengthening method are absence yet in Korea. This paper therefore derived items and proposed methodologies for quantity estimate considering uncertainty to select a optimum strengthening method among conceptually designed alternatives. And also, to demonstrate the applicability and verification of the proposed approach, it was applied to select the optimum strengthening method for the deteriorated T-shape concrete girder bridge. The model and the procedure can greatly contribute to the uncertainty-oriented alternative selection.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.417-417
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• 2019

하천의 기능은 공학적 관점에서의 이수, 치수, 환경 기능 외에도 사회적 관점에서 역사 문화 기능을 포함할 수 있다(우효섭, 2009). 1990년대 말부터 하천복원사업이 본격화 되면서 최근에는 하천환경 기능 외에도 친수를 포함한 역사 문화 기능이 하천관리의 주요 축으로 고려되거나 포함되고 있다. 이 과정에서 하천의 역사 문화 기능을 주문하는 요구가 증가한 이유로는 하천복원사업의 지역적 획일화, 친수(심미) 요구 증대, 지역 경제성 제고, 환경(생태, 문화 등) 가치 증대 등 사회경제적 정책적 환경 변화가 기인한 부분이 크다고 할 수 있다. 이러한 측면에서 볼 때 하천의 지속가능하고 효과적인 관리와 보전을 위한 방안으로 하천의 역사 문화적 요소를 사회 경제적, 생태 환경적 요소와 연계하는 접근방식은 유용할 수 있다. 이를 위해서는 우선적으로 지역공동체가 형성해온 물 문화의 특수성을 감안하여 하천유역의 역사 문화적 소재 및 자원을 발굴할 필요가 있다. 그리고 조사 수집된 다양한 역사 문화적 소재 및 자원은 하천사업 및 관리의 주요 콘텐츠로 활용되기 위한 창출과정을 진행함으로써 사회 경제적, 생태 환경적 요소와 연계할 수 있다. 본 연구에서는 하천유역을 대상으로 문헌조사 기반의 사전조사와 심도 있는 현장조사(탐문조사 등) 수행결과를 토대로 향후 하천복원사업에 활용될 수 있는 다양한 역사 문화적 소재와 자원 등에 관한 콘텐츠를 도출하였다. 또한 콘텐츠 활용방안은 하천 역사 문화 자원의 세부적인 콘텐츠를 아우를 수 있는 테마설정을 통하여 대상지 및 지역특성(치수 안전, 지역요구, 물 문화 가치 등) 등을 고려한 방안을 제시하였다. 특히, 친수 측면에서 현재 수변공간을 이용하는 방문자수, 목적(산책, 스포츠, 낚시, 물놀이, 레저 등) 등에 대한 패턴과 지역 인구 현황, 접근 인프라(교통, 이동로, 편의시설 등), 주민 요구도 등 잠재적 친수도는 물 문화 형성이라는 측면에서 볼 때 주요한 고려사항이라 할 수 있다.