Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Suggestion of the defect score and condition grading protocol about sewer pipe

하수관로 결함 점수 및 상태 등급 판정 방법 제안

  • Kim, Jungruyl (Department of Civil and Environmental Engineering, Chung-Ang University) ;
  • Lee, Jaehyun (Department of Civil and Environmental Engineering, Chung-Ang University) ;
  • Oh, Jeill (Department of Civil and Environmental Engineering, Chung-Ang University)
  • 김정률 (중앙대학교 사회기반시스템공학부) ;
  • 이재현 (중앙대학교 사회기반시스템공학부) ;
  • 오재일 (중앙대학교 사회기반시스템공학부)
  • Received : 2016.12.15
  • Accepted : 2017.02.01
  • Published : 2017.02.28
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Abstract

This study was performed to propose the sewer defect scoring, and grading protocols for sewer condition assessment. For this, sewer defect scoring methods were comparatively analyzed and reviewed for four international condition assessment protocols, which are established based on WRc manual. As a result, we proposed a new protocol for sewer condition assessment, in which characteristics of sewer pipes are considered by segment. In reference to the PIM-3, the extent of ground subsidence was adopted to be of importance, and renewal scores increased in accordance with weighting of defects causing structural backfill materials. Also, defect grades of 'Hole' were extended to 5 levels of the grading, and 'Surface Damage' was excluded in defect assessment. The addition of 'Buckling' resulted in reduction of weights in 'Surface Damage' and 'Lining Defects'.

Keywords

References

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