A Study on Accidents of Buried Pipeline Crossing River

하천통과 매설배관의 사고사례에 대한 연구

  • Ma, Young-Wha (Dept. of Mechanical Engineering, Chung Ang University) ;
  • Kim, Ji-Yun (Dept. of Mechanical Engineering, Chung Ang University) ;
  • Yoon, Kee-Bong (Dept. of Mechanical Engineering, Chung Ang University) ;
  • Do, Young (Dept. of System Research, Korea Gas Safety Corporation)
  • 마영화 (중앙대학교 기계공학부) ;
  • 김지윤 (중앙대학교 기계공학부) ;
  • 윤기봉 (중앙대학교 기계공학부) ;
  • 조영도 (한국가스안전공사 시스템연구부)
  • Received : 2010.10.04
  • Accepted : 2010.12.28
  • Published : 2010.12.31

Abstract

Records of accidents for buried pipeline across the river were gathered and causes were analysed. The results are intended to be utilized as basic data for determining a reasonable criteria for the depth of buried city gas pipeline crossing the river. Accident of river-crossing buried pipeline was mainly caused by flood. Sometimes corrosion was detected at the failed location of the pipe. In order to determine reasonable and efficient depth of burial of the pipeline, hydraulic evaluation of the river and structural analysis of the pipeline are necessary. Published data for the buried natural gas pipeline incidents were also investigated and summarized. Main causes of buried natural gas pipeline incidents were external interference and corrosion. However, the two main causes of incidents showed significant difference in the proportion of the entire incident, depending on burial environment.

해외 하천통과 매설배관 사고사례를 수집하여 분석하였다. 이는 국내 하천통과 도시가스매설배관의 합리적인 매설심도를 결정하기 위한 기본 자료로 활용하기 위함이다. 사고사례 조사결과 하천을 통과하는 천연가스매설배관 사고의 주요원인은 홍수로 분석되었다. 홍수에 의한 배관 노출 및 과도 유량에 의한 하중이 파손 원인인 경우가 많다. 파손발생 위치에서 부식이 발생한 것도 원인이 되었다. 따라서 국내 하천통과 매설배관의 합리적이고 효율적인 매설심도 결정을 위해서는 국내 하천특성에 맞는 하천의 수리학적 특성평가와 배관의 구조해석이 요구된다. 일반 천연가스배관의 사고사례 조사 결과도 주요 원인이 외부간섭과 부식임도 요약하였다. 이들 두 주요원인은 매설환경에 따라 전체사고에서 차지하는 비율이 차이가 있었다.

Keywords

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