• Title/Summary/Keyword: 현장적용 사례

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Case study on the treatment of soft soil ground in railroad sites (철도 현장의 연약지반 처리에 대한 사례연구)

  • Kim, Joon-Seok
    • Proceedings of the Korean Society of Disaster Information Conference
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    • 2017.11a
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    • pp.239-240
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    • 2017
  • 철도노반 현장의 저성토구간의 연약지반구간에 대하여, 성토높이 3m 이내인 저성토구간의 경우 열차하중에 따른 연약지반의 처리를 어떻게 하는 것이 향후 재난발생을 예방할 수 있는지에 대하여 설계기준 원문을 대상으로 적용방법에 대한 분석을 실시하였다.

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A Case Study on Reinforcement Method by Excavation Adjacent to the Subway Tunnel using Numerical Analysis (수치해석을 통한 지하철 구조물 인접 굴착에 따른 보강공법 적용사례연구)

  • Byun, Yo-Seph;Jung, Kyoung-Sik;Chun, Byung-Sik
    • Journal of the Korean GEO-environmental Society
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    • v.12 no.9
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    • pp.5-11
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    • 2011
  • Recently, large and deep excavations are increasing. The damage of adjacent structures due to excavation has steadily increased with increasing construction demand. Especially in urban development and poor conditions, the excavation adjacent to the subway structures has caused a lot of problems. This paper was reviewed that the underground excavation and reinforcement of the status process through a case study on the field. And stability analysis through the case study evaluates applicability for reasonable reinforcement method by numerical analysis. As a result, the strata distribution condition of all 16 sites consisted of landfill from the top and distributed in the order of deposits, weathered soils, weak rock from the bottom. Also, when proceeding the excavation adjacent to structures, the location of site and layer conditions have highly effect on the results of the construction. Therefore, this study was applied reinforcement method to protect damage by excavation. Displacement and settlement were within allowable criterion and hence, stability of structure was analyzed as safe.

A Case Study on Problems of Inverter Application for large Power Plant (대용량 발전소 인버터 적용시의 문제점 사례연구)

  • Ryu, Ho-Seon;Lim, Ick-Hun
    • Proceedings of the KIPE Conference
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    • 2008.06a
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    • pp.568-570
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    • 2008
  • 본 논문은 이차공기송풍기를 가변 회전수 제어하여 소내 소비 전력을 절감하고, 전동기의 직입기동에 의한 스트레스를 줄이기 위하여 실증 적용된 발전소 이차 공기송풍기 구동용 H-브릿지 멀티레벨 인버터에 관한 것이다. H-브릿지 멀티레벨 인버터는 독립적으로 절연된 직류 부를 갖는 저압의 단상 인버터(셀 인버터)를 다수 직렬 접속하여 고압 3상 전압을 출력하는 Cascaded H-브릿지 전압형 인버터이다. 주요내용은 국산 인버터 발전소 현장적용 기술을 바탕으로 대형 인버터 현장 실측 내용과 적용시의 문제점들을 다루어 발전소에 확대 적용에 도움을 주고자한다.

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A Case Study About Applying Electronic Detonator on Downtown Tunnel Construction Area (도심지 터널에 대한 전자뇌관 적용 시공 사례)

  • Hwang, Nam-Sun;Heo, Eui-Haeng;Kim, Kyung-Hyun;Kim, Jeoung-Hwan;Seong, Yoo-Hyeon;Kim, Nam-Su
    • Explosives and Blasting
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    • v.40 no.1
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    • pp.29-38
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    • 2022
  • Electronic detonators are now widely used in various construction sites and quarry mines. Including the sites where safety-thing is located nearby, Cases of using electronic detonators are increasing to maximize operational efficiency by improving blast fragmentation or reducing the cost of secondary blasting. This case study is about applying for electronic detonators on zone 00 construction site, which is the part of urban area metropolitan express rail A line project. Although the project was initially planned to utilize non-electric detonators, Electronic detonators are considered as the solution not only for safe and fast excavation, but also to minimize civil complaint and the damage of safety-thing. By applying electronic detonators, we were able to satisfy environmental regulations standards and prevent nearby safety-thing from getting damaged.