Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Assessment of Structural Safety of Buried Water Mains

매설관의 구조적 안전성 평가에 관한 연구

  • 배철호 (한국수자원공사 수자원연구원) ;
  • 김주환 (한국수자원공사 수자원연구원) ;
  • 김정현 (한국수자원공사 수자원연구원) ;
  • 홍성호 (숭실대학교 환경화학공학과) ;
  • 이경재 (한국수자원공사 수자원연구원)
  • Received : 2006.06.21
  • Accepted : 2007.04.11
  • Published : 2007.04.15
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Abstract

Criteria for rehabilitation priority are discussed to evaluate structural stability of deteriorated water transport and transmission pipes, in this study. For the purposes, safety factor is introduced and estimated by measuring tensile strength and by analyzing stress caused by the internal-external loads working on buried pipe body. Related informations are surveyed and collected under various conditions in the fields by digging out and the structural stability is assessed. In the evaluation results of structural safety, it is shown that steel pipe is more affected by external load than internal load. The average external load is estimated as $53.7kg/cm^2$ and total hoop stress is estimated by $2676.5kg/cm^2$. Also, Poisson effect into longitudinal direction due to internal and external loads is most influential on hoop stress. The calculated safety factors of hoop stress are ranged from 0.7 to 5.2 with average value of 2.1, considering a bending stress to longitudinal direction. The decision of rehabilitation priority by safety factors show that structural safety of CIP sample 1(S1) was assessed at the lowest order with safety factor value, 0.7 and that of DI sample 15(S15) was evaluated as the most stable in structural aspect.

Keywords

Acknowledgement

Supported by : 수처리선진화사업단

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