• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.1024-1029
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• 2009

According to increase of massive concrete structures, Thermal crack done by heat of hydration have been increased in a process of the execution. In case of a subway concrete box structure, thickness of structures are almost over 1 meter, and penetrating crack by external restraint takes a bad effect on the durability with a water leakage and deterioration in especially concrete wall. A try of shortening a constructing period often occurs as subway is generally constructed according to a road to decrease a traffic jam. The research proposes executing method by skipping one block as a plan of shortening a constructing period and investigate an influence on thermal cracking control. Additionally, sensitivity analysis is accomplished by changing a height of a concrete wall, and concrete placing and air temperature met with a field condition.

• Journal of the Korea institute for structural maintenance and inspection
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• v.13 no.6 s.58
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• pp.192-203
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• 2009

In the new Seoul-Busan high speed railroad construction specially in area of city center passage the roadbed establishment is recommended the staibility for the existing subway tunnel segments of Busan subway 1st and 2nd lines regarding the appearance condition, a quality condition and the durability of the objective facility, and it evaluates the numerical analysis using MIDAS/GTS which leads the stability of the objective facility and investigatesd tunnels. Fundamental issues in tunneling under high groundwater table are discussed and the effect of groundwater on tunnel excavation was examined using a 3D stress-pore pressure coupled Finite-Element Method. Based on the results the interaction mechanism between the tunnelling and groundwater is identified. In the both of 1st and 2nd Line the maximum sinkage, unequal sinkage and the lining stress from numerical analysis are within permission and the damage degree is appearing to be disregarded. But it enforces necessary Pre-grouting in order to minimize an actual tunnel face conduct and when the tunnel is excavated it is also necessary to minimize the outflow possibility.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.7
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• pp.3220-3226
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• 2011

In order to monitor internal risk factors such as fire, terror, etc. on the subway station, the surveillance systems using CCTV and various kinds of sensors have been implemented and recently, introduction of surveillance systems using an advanced IT technology, sensor network technology is tried on several areas. Since 2007, Korean government has made an effort to develop the intelligent surveillance and monitoring system, which can monitor fire, intrusion, passenger congestion, health-state of structure, etc., by using wireless sensor network technology and intelligent video analytic technique. For that purpose, this study carried out field wireless communication environment test on Chungmuro Station of Seoul Metro on the basis of ZigBee that is considered as a representative wireless sensor network before field application of the intelligent integrated surveillance system being developed, arranged and analyzed and ZigBee based wireless communication environment test results on the platform and waiting room of Chungmuro Station on this paper. Results of wireless spectrum analysis on the platform and waiting room showed that there is no radio frequency overlapped with that of ZigBee based sensor network and no frequency interference with adjacent frequencies separated 10MHz or more. As results of wireless data transmission test using ZigBee showed that data transmission is influenced by multi-path fading effect from the number and flow rate of passengers on the platform or the waiting room rather than effects from entrance and exit of the train to/from the platform, it should be considered when implementing the intelligent integrated surveillance system on the station.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.1701-1708
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• 2011

A typical day in the subway transportation is used by hundreds of thousands are also concerned about the safety of the various workrooms with high underground fire or other less than in the subway users could be damaging even to be raised and there. In 2010, in fact, room air through vents in the fire because smoke and toxic gas accident victims, and train service suspended until such cases are often reported. In response to these incidents in subway stations, even if the latest IT technology, wireless sensor network technology and intelligent video surveillance technology by integrating fire and structural integrity, such as a comprehensive integrated surveillance system to monitor the development of intelligent urban transit system and are under study. In this study, prior to the application of the monitoring system into the field stations, authors carried out the ZigBee-based wireless sensor networks performance analyzation in the Chungmuro station. The test results at a communications room and ventilation room of the station are summarized and analyzed.

• The Journal of Engineering Geology
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• v.20 no.1
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• pp.47-60
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• 2010

This study is focused on the analysis of tunnel behavior to estimate the stability on tunnel design. An estimation method was proposed as a hybrid consideration, which contains the displacement analysis by 3D numerical simulation, the maximum displacement obtained after field measurement, and an assessment of tunnel stability using a deformation analysis proposed by Sakurai(1988, 1997). The points of case study by Sakurai(1988, 1997) were replotted considering his analysis. From the new analysis of the tunnel case study, the trend line for analyzed points is analogized, which curve is divided into stable, unstable and failure zone. To evaluate the estimation method, a special shape of railway tunnel was selected, which are the Inchon international airport rail way connected to subway line 9 in Gimpo, Korea. The point s of upper and below track on the Inchon international airport rail way were satisfied to the stability of tunnel after reinforcing. Also the points shows the higher apparent Young's modulus, which resulted from improvement on shear strength by the micro silica grouting and the supporting of umbrella method. Therefore, if new analysis used, proper tunnel reinforcing method could be selected according to tunnel strain and geological property.

• The Science & Technology
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• v.30 no.1 s.332
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• pp.75-79
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• 1997

1997년 초부터 신용카드와 전화카드 그리고 지하철 티켓을 한장의 카드로 대용할 수 있는 'KT-국민카드'가 선을 보이기 시작한데 어이 1997년 7월에는 국내은행이 공동개발한 '전자지갑'이 첫 선을 보인다. 한편 내무부는 1998년부터 일곱가지의 증명(주민등록증, 운전면허증, 의료보험증, 국민연금증명서, 주민등록 등ㆍ초본, 인감증명서 포함)을 내장한 '전자주민카드'를 발급할 계획이다. 우리나라에서도 전자카드만 가지면 불편없이 생활할 수 있는 시대가 빠른 걸음으로 다가오고 있다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 1996.03a
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• pp.11-24
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• 1996

최근 들어 지하공간 활용에 대한 필요성이 강하게 대두되면서 지하암반 굴착공사가 매우 활발하게 진행되고 있다. 오래 전부터 공사되었던 지하철 및 산악터널 뿐만 아니라 오늘날에는 지하암반의 특수성을 이용한 지하공간 사업 즉, 지하양수 발전소, 핵폐기물 저장소, 유류 비축기지 등이 건설 중에 있으며, 지하공간과 관련된 대형 프로젝트가 구상되고 있다. (중략)

• 건강소식
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• v.36 no.1
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• pp.32-36
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• 2012

빼곡히 들어찬 마천루 속 서울 하늘 아래. 그 한복판에 전통과 현대가 어우러진 북촌이 자리해 있다. 특히 도심 속 북촌이 더욱 빛나는 이유는 바로 사람들이 살고 있는, 여느 다를 바 없는 삶의 현장이기 때문이다. 어디부터 어디까지 선을 그어 한옥마을로 지정해놓은 게 아니라, 동시대를 사는 사람들이 함께 살 부대끼며 살고 있는 곳이다. 추운 날, 멀리 나갈 것도 없다. 전통과 현대가 어울린 독특한 멋과 매력에 빠지고 싶다면 지하철 3호선 안국역 3번 출구에서 찬찬히 출발해보자.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.05a
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• pp.115-120
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• 2002

최근 도시의 과밀화, 지가 상승, 평면적 토지 공간이 부족하게 됨에 따라 도시기능의 일부를 지하공간으로 흡수하고자 하는 노력이 발생하게 되었고, 이에 대한 사회의 관심이 높아지고 있어 지하공간의 활용이 증가되는 추세이다. 국내$\cdot$외에서 지하철 공사현장 가스폭발, 지하 공동구 화재, 지하가 화재$\cdot$폭발 등 지하공간에서의 사고가 다수 발생하고 있다. 이러한 사고는 재산의 손실 뿐 아니라 전력, 통신망 마비로 도시 기능을 무력화시키고, 인명 피해의 대형화를 동반함으로서 도시민의 안전을 위협하고 있다. 지하공간에 있어서 사고는 지하가, 지하통로 및 건축물 지하 등이 30%를 차지하고, 사고 형태는 화재 폭발이 36%를 차지하고 있다.(중략)

• Proceedings of the KIEE Conference
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• 2009.04a
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• pp.213-215
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• 2009

본 연구에서는 화재시 재실자의 안전한 피난을 유도하는 피난유도시설의 설치기준과 지하철역사, 대형편의점(마트), 종합병원 등 의료시설, 학교 등 교육시설과 같은 불특정 다수의 사람이 이용하는 건축물에 설치된 피난 유도등의 현장적용사례와 유지관리 실태를 조사하였다. 이러한 건축물에서 재실자의 피난에 영향을 미치는 요소, 예상되는 인명 안전 등에 대하여 분석하여 문제점을 도출하였다. 본 연구결과는 기존의 소방시스템의 문제점으로 지적되고 있는 화재 발생 위치와 확산 경로에 관계없이 획일적으로 피난 방향을 표시하고 있는 시스템의 개선을 위한 최적의 피난 경로를 표시하는 인공지능형 방향성 유도등 개발에 활용할 것이다.