Safety analysis and deterioration evaluation of water pipe for improvement according to service year

Hyuk Jae Kwon; Kyung Je Lee

doi:10.3741/JKWRA.2021.54.8.589

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2021 Vol.54, Issue 8 Preview Page Next Page

Research Article

Safety analysis and deterioration evaluation of water pipe for improvement according to service year 상수도관의 개량을 위한 시간에 따른 노후도 및 안전성 분석

31 August 2021. pp. 589-597

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Abstract

In this study, corrosion depth equation was suggested according to real measured corrosion data, and then management indexes of pipe network which can determine the deterioration rate and safety rate has been established and applied to real pipe networks. Furthermore, reliability analysis and management index analysis have been conducted to estimate and compare the deterioration rate. From the results of reliability analysis, it was found that probability of failure of 200 mm steel pipe can be increased from 4.36% at present time to 8.23% after 20years at Gaduk and from 7.35% to 12.99% at Nami. From the results of management index analysis, it was found that deterioration rates of Gaduk and Nami are 1.009 and 1.174, respectively. Priority of improvement and replacement of water pipe can be determined by results of reliability analysis and management index analysis.

Keywords

Pipe thickness

Probability of pipe failure

Corrosion

Water pipe

management index

본 논문에서는 부식깊이의 실측 데이터를 통해 부식깊이 예측식을 수립하고 상수관망의 노후도 및 안전도 등을 결정할 수 있는 운영인자를 수립하여 실제 관망에 적용하였다. 신뢰성해석과 운영인자 분석을 통해 노후도를 비교·분석 하였다. 신뢰성해석결과 가덕의 직경 200 mm 관의 경우 시간이 경과함에 따라 4.36%, 6.18%, 8.23%로 증가하는 것으로 나타났고 남이의 직경 200 mm 관의 경우 시간이 경과함에 따라 7.35%, 9.51%, 12.99%로 증가하는 것으로 나타났다. 운영인자를 결정하여 방사형 차트 면적을 통해 노후도를 비교한 결과 가덕은 1.009, 남이는 1.174로 남이 지역이 노후도가 큰 것으로 나타났다. 신뢰성해석과 운영인자를 통해 교체 우선순위를 결정할 수 있었다.

키워드

관두께

관파괴확률

부식

상수도관

수충격해석

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 54
No :8
Pages :589-597
Received Date : 2021-05-31
Revised Date : 2021-06-15
Accepted Date : 2021-06-15
DOI :https://doi.org/10.3741/JKWRA.2021.54.8.589

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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