• Title/Summary/Keyword: "공사"편

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A Case Study on the Field Monitoring of the Deep Rock Excavation Site in Urban Area on Severe Unbalanced Pressure Condition (편토압이 심한 도심지 대심도 암반굴착공사에서의 계측사례)

  • Kim, Tae-Seob;Kim, Woong-Kyu;Jung, Chang-Won;Han, Chul-Hee
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.10a
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    • pp.1259-1267
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    • 2008
  • One of the most important item for insuring the stability of ground in urban deep excavation site near by major structure such as subway is displacement control of earth retaining wall. The field monitoring system is classified by two types as manual system and automatic system. The application case of latter type of field monitoring is increased because real time measurement is possible in automatic system and that is correspondent with the recent constructional trend. Though the automatic monitoring system is more useful and advanced than manual monitoring system, accuracy of the system is not verified sufficiently. It was examined that the reliance of automatic monitoring system in this paper through the comparison of monitoring result obtained one of deep urban excavation site in which the each type of monitoring system was executed concurrently. Result of the examination is that the two types of monitoring system is generally alike in view of monitoring result, so the engineering reliance of automatic system was confirmed in case site. This study was researched in restricted one case site, so it is expected more precise analysis from security of more data monitored and progressive study.

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Facility Information Guide for Vulnerable Users in Seoul Subway Transportation (서울시 지하철 교통약자를 위한 승강편의시설 정보 안내)

  • DongHyun Ko;Min HwangBo;JiWon Shin;NaYeong An;Yoo-Jin Moon
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2023.01a
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    • pp.411-412
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    • 2023
  • 본 연구는 서울특별시 275만명의 교통약자들이 서울시내 대중교통의 중심인 지하철 이용에 막대한 영향을 미칠 수 있는 지하철 역내의 승강 및 편의시설 위치 및 설치 정보를 수집하여 데이터베이스 시스템으로 구축하였다. 이를 바탕으로 장애인을 비롯한 교통약자들이 쉽게 이동여부를 판단할 수 있도록 승강시설의 위치와 장애인화장실의 여부, 수어영상전화기의 수, 전동휠체어 급속충전기의 여부 등을 비롯하여 지하철내 장애인 편의시설의 설치 정보를 제공한다. 나아가 지하철의 승강시설의 수와 실태는 서울시 및 교통공사 등 신규 시설 구축을 위한 이해관계자들의 기초 데이터로 활용이 가능한 점에서, 교통약자들의 편의 시설 개선을 위해 활용될 수 있다고 사료된다.

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Research on the Chapter Titled "Hangnok" from The Jeon-gyeong (『전경』 「행록」편 연구)

  • Ko, Nam-sik
    • Journal of the Daesoon Academy of Sciences
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    • v.32
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    • pp.31-76
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    • 2019
  • Lee Sang-ho published Jeungsan Cheonsa Gongsagi (Records of the Holy Works of Celestial Master Jeungsan) in 1926. Then, after complementing the book with additional materials, he published Daesoon Jeon-gyeong in the form of a religious scripture. Since then, Daesoon Jeon-gyeong has been expanded to a sixth edition which was published in 1965. The Haengnok of Daesoon Jinrihoe's The Jeon-gyeong, which was published decades later than Daesoon Jeon-gyeong describes Sangje's whole life year by year in five chapters starting from his descent to the human world all the way to his passing into heaven. It comprehensively contains the essential contents of other chapters from The Jeon-gyeong. This paper was written for the following three goals: first, to study the contents of Haengnok that summarize Sangje's life. Second, to see how its contents are related to descriptions from the other six chapters. Lastly, to discuss how certain verses have been changed from the way they appeared Daesoon Jeon-gyeong. When we compare these two scriptures, there are some verses that are found only in the Haengnok section of The Jeon-gyeong. For example, the verse that explains how Sangje's family name 'Kang' originated and how his ancestors came to live in Gobu area is described only in The Jeon-gyeong. The origin of the family name Kang is considered important because he descended into the world as a human bearing the family name Kang, and it is included in his official name that represents his divine position. Also, unique to The Jeon-gyeong are verses such as those describing "Samsin San (the three holy mountains) in the area where Sangje descended to and verses about the historical change of place names in the areas where Sangje lived. These verses have great significance in terms of their mystical aspects within Daesoon Thought. Secondly, the record about Sangje's Holy Works at Siru Mountain in The Jeon-gyeong is not found in Daesoon Jeon-gyeong. The Holy Works at Siru Mountain are important because they provide proof of Sangje's major activities during the period between his 3-year travel around the country and his Cheonji-gongsa (Reordering Works of the Universe). Next to be observed are some changes in verses that can be seen when comparing The Jeon-gyeong to Daesoon Jeon-gyeong. Of particular impostance here are the story of Sangje's Holy Work called 'King in White Cloth and General in White Cloth' and the description of Sangje's passing into heaven. Both records contain key changes that distinguish The Jeon-gyeong from Daesoon Jeon-gyeong.

Field Application of RFID for the Cavity Maintenance of Under Pavement (도로하부 공동의 유지관리를 위한 RFID의 현장 적용성 평가)

  • Park, Jeong Jun;Shin, Eun Chul;Kim, In Dae
    • Journal of the Society of Disaster Information
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    • v.15 no.4
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    • pp.459-468
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    • 2019
  • Purpose: The cavity exploration of the lower part of the road is carried out to prevent ground-sinking. However, the detected communities cannot be identified by the cavity location and history information, such as repackaging the pavement. Therefore, the field applicability of RFID systems was evaluated in this study to enable anyone to accurately identify information. Method: During temporary recovery, tag recognition distance and recognition rate were measured according to underground burial materials and telecommunication tubes using RFID systems with electronic tag chips attached to the bottom of the rubber cap. Result: The perceived distance and perceived rate of depth for each position of the electron tag did not significantly affect the depth up to 15cm, but it did have some effect if the depth was 20cm. In addition, water effects from nearby underground facilities and rainfall are relatively small, and the effects of wind will need to be considered during the weather conditions of the road. Conclusion: The RFID tags for field application of the pavement management system store various information such as location and size of cavity, identification date, cause of occurrence, and surrounding underground facilities to maximize cavity management effect with a system that can be computerized and mobile utilization.

Development of deep learning algorithm for classification of disc cutter wear condition based on real-time measurement data (실시간 측정데이터 기반의 디스크커터 마모상태 판별 딥러닝 알고리즘 개발)

  • Ji Yun Lee;Byung Chul Yeo;Ho Young Jeong;Jung Joo Kim
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.26 no.3
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    • pp.281-301
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    • 2024
  • The power cable tunnels which are part of the underground transmission line project, are constructed using the shield TBM method. The disc cutter among the shield TBM components plays an important role in breaking rock mass. Efficient tunnel construction is possible only when appropriate replacement occurs as the wear limit is reached or damage such as uneven wear occurs. A study was conducted to determine the wear conditions of disc cutter using a deep learning algorithm based on real-time measurement data of wear and rotation speed. Based on the results of full-scaled tunnelling tests, it was confirmed that measurement data was obtained differently depending on the wear conditions of disc cutter. Using real-time measurement data, an algorithm was developed to determine disc cutter wear characteristics based on a convolutional neural network model. Distributional patterns of data can be learned through CNN filters, and the performance of the model that can classify uniform wear and uneven wear through these pattern features.

Measurement and Analysis of Low Flow in the Cheonggecheon Watershed (청계천 유역 갈수량 측정 및 분석)

  • Noh, Seong Jin;Kim, Hyeon Jun;Jang, Cheol Hee;Kim, Dong Pil;Hong, Il Pyo
    • Proceedings of the Korea Water Resources Association Conference
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    • 2004.05b
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    • pp.1067-1071
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    • 2004
  • 도시 유역의 물순환 특성을 종합적으로 이해하기 위해서는 갈수량 자료의 구축이 필수적이다. 하지만 지금까지의 인구는 주로 치수분야에 한정되어 대부분의 자료 또한 홍수기에 대해서만 자료가 구축되어 있으며 상대적으로 갈수기에 내한 자료와 관련 연구는 부족한 편이다. 본 연구에서는 청계천 유역의 기존 수문자료를 이용하여 유역의 유출 특성을 분석하고 갈수량을 측정하여 청계천 유역의 물순환 특성을 파악하기 위한 기초자료를 구축하였다. 청계천은 서울의 서북쪽에 위치한 인왕산과 북한산의 남쪽 기슭, 남산의 북쪽 기슭에서 시작하여 서에서 동으로 종로, 세운상가, 동대문 등 서울의 도심부를 흐르는 유로연장 13.75 km, 유역 면적 $50.96 km^2$의 도시하천으로 중량천의 제1지류인 지방2급 하천이며, 정릉친, 성북천을 제1지류, 월곡천을 제2지류로 포함한다. 청계천은 도시화로 인해 1950년대부터 1970년대까지 점차 복개되었다가 2003년 7월부터 5.9 km의 본류구간에 대한 복원공사가 진행 중이다. 청계천은 홍수기 이후 유량이 급격히 줄어 11월 이후에는 다음 홍수기까지 강바닥이 완전히 들어나는 일종의 간헐천으로 홍수기를 제외한 시기의 자료는 전무한 실정이다. 본 연구에서는 유역내 8개의 모니터링 지점을 선정하여 2003년 9월 이후, 월 2회 이상 갈수량 자료를 현장 측정${\cdot}$분석하였다. 청계천 유역은 복원공사 완공 후에는 유역의 물순환 특성이 대폭 바뀔 것이 예상되는 지역으로 본 연구에서 구축된 갈수량 자료는 청계천 유역의 물순환계 변화를 분석하고 건전한 물순환 체계의 유지${\cdot}$관리를 위한 기본 자료가 될 것으로 판단된다., 바늘꽃과, 속새과, 십자화과, 장미과, 사초과, 삼과, 현삼과, 닭의장풀과가 각 1종씩 조사되었으며, 조사지점(II)인 1km지점에서는 15과 26종으로, 벼과가 4종, 마디풀과, 국화과가 3종, 버드나무과, 십자화과, 콩과가 2종씩, 바늘꽃과, 속새과, 자라풀과, 장미과, 사초과, 백합과, 현삼과, 골풀과, 닭의장풀과가 각 1종씩으로, 조사지점( I )보다 좀 더 많은 종이 분포하는 것으로 조사되었다. 또한 어류는 조사지점( I )에서 3회에 걸쳐 총 396개체가 채집되어 3목 8과 21종이었다. 이 중 한국 고유종은 11종이었고, 외래 어종은 검정우럭과 2종이 조사되었으며, Zacco platypus(피라미), Zacco temmincki(갈겨니), Acheilongnathus koreanus(칼납자루), Odontobutis platycephala(동사리), Coreoleuciscus splendidus(쉬리) 순으로 분포하고 있었고, Acheilognathus signifer(묵납자루)는 댐 건설 전에는 많이 분포하였으나 현장조사에서 서식을 확인 할 수 언어 개체수의 큰 감소내지 멸종된 것으로 추정되었다.에서 동시에 시행하였다. 수술 후 1년 내 시행한 심초음파에서 모든 환아에서 단지 경등도 이하의 승모판 폐쇄 부전 소견을 보였다. 수술 후 조기 사망은 없었으며, 합병증으로는 유미흉이 한 명에서 있었다. 술 후 10개월째 허혈성 확장성 심근증이 호전되지 않아 Dor 술식을 시행한 후 사망한 예를 제외한 나머지 6명은 특이 증상 없이 정상 생활 중이다 결론: 좌관상동맥 페동맥이상 기시증은 드물기는 하나, 영유아기에 심근경색 및 허혈성 심근증 또는 선천성 승모판 폐쇄 부전등을 초래하는 심각한 선천성 심질환이다

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A Study on Identifying Topics and Trends in International Cadastral Research Using LDA: With Special Reference to the FIG Peer Review Journal (LDA를 이용한 국제지적연구의 주제와 추세확인에 관한 연구: 특히 FIG Peer Review Journal을 중심으로)

  • kim, Yun-Ki
    • Journal of Cadastre & Land InformatiX
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    • v.48 no.1
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    • pp.15-33
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    • 2018
  • The main purpose of this study was to identify the topics and research trends of international cadastral research using LDA. To achieve this goal, I reviewed the literature on LDA and international cadastral study and formulated four research questions that are topics of cadastral researchers, distribution of topics, the most influential topics and changes of topics over time. To answer these research questions, I analyzed 370 papers published in the FIG Peer Review Journal between January 1, 2008, and October 31, 2017, using LDA. As a result of the analysis, I confirmed that there are twelve major topics in international cadastral research. And the most influential topic of these topics was identified as topic 2(cadastral information systems), and topic 5(land development and land administration) was also confirmed as playing an important role in the overall document. These two topics have been the most popular topics whose trendlines have been very active over the past decade and will play a leading role in future cadastral research.

Relationship between Yield and Quality of Rice Varieties Grown in Reclaimed Saline Paddy Field (간척지 재배 벼 품종의 수량과 품질과의 관계)

  • Je-Cheon Chae
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.47 no.3
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    • pp.259-262
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    • 2002
  • Relationship between yield and palatability value measured by vice taster among 9 rice varieties was investigated to obtain basic information for production of rice with high quality in reclaimed paddy field. The rice yield showed a highly negative correlation with palatability value of milled rice (r=-0.49$^{**}$). The varieties of high palatability value tend to show low yield. The protein content of milled rice grown in reclaimed paddy field was higher than 7.5% mainly due to heavy fertilization of nitrogen and irrigation of eutrophicated water, The rice varieties such as Daeanbyeo, Jinpumbyeo and Sindongjinbyeo were recommendable only for higher yield, but in view of rice quality, Kwanganbyeo, Surabyeo and Nampyoengbyeo were more recommendable because of their lower protein content and higher palatability value.e.

Analysis of Accident Patterns and Hazard Factor for Life Safety in Rental Housing Complex (임대주택단지의 생활안전 사고유형 및 위해요인 분석)

  • Sohn, Jeong-Rak;Bang, Jong-Dae;Cho, Gun-Hee;Kim, Jin-Won
    • Land and Housing Review
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    • v.7 no.3
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    • pp.147-156
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    • 2016
  • The government has been supplying public rental housing for stable life of low-income group since 1989. However, deteriorated public rental housing are likely to caused accident due to aging facilities. In this study, investigated the types of accidents that occur in the public rental housing and analyzed the hazard factors for each type. First, identified the type of accidents that occur in apartment through previous studies and interviews. Next determined the type of accidents that occur in public rental housing and analyzed the hazard factors through surveys. The results of this study would be basic information of planned and systematic management plan for safe and comfortable residental life in public rental housing. And it can be utilized on the basis information that can improve the design and management method to supply future public rental housing.

Relationship between Hydrogeological Characteristics and Subsurface Geology in Central Busan Megacity (부산광역시 도심부 수리지질 특성과 지하지질 발달상태의 관련성)

  • Ryu, Sang-Hun;Hamm, Se-Yeong;Cha, Yong-Hoon;Jang, Seong;Jeong, Jae-Hyeong;Son, Moon;Kim, Ki-Seok
    • The Journal of Engineering Geology
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    • v.17 no.3
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    • pp.367-379
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    • 2007
  • This study intended to evaluate hydrogeological characteristics in relation to subsurface geology data obtained from borehole, groundwater level, borehole flowmeter test, and field hydraulic tests. The regression equation of groundwater level (Y) versus ground elevation (X) is expressed by Y=0.75X-7.00 with quite high correlation coefficient of 0.78. Relationship between groundwater level and thickness of landfill, alluvium, and weathered zone results in higher correlation of groundwater level (Y) versus natural log value of weathered tone (A) than other correlations, with the regression equation Y= exp(9.974A)-14.155. The result of groundwater flow measurement in the boreholes indicates that groundwater flows towards between south and southwest, and this approximately agree with regional distribution of groundwater levels.