Correlation between temperature distribution and defect progress of concrete lining in urban railway tunnels

Jinho Choo; Chang-Kyoon Yoo; Jin-Woo Park; Kwang-Lim Park

doi:10.9711/KTAJ.2025.27.4.257

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2025 Vol.27, Issue 4 Next Page

Research Paper

Correlation between temperature distribution and defect progress of concrete lining in urban railway tunnels 도심지 철도터널 내 온도분포에 따른 콘크리트라이닝 결함 진행의 상관관계

31 July 2025. pp. 257-269

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Abstract

Although temperature fluctuations inside tunnels are generally smaller than those observed in above-ground structures, they can still lead to freeze-thaw cycles in cold regions and cause variations in joint leakage in areas with high groundwater levels. This study examines temperature variations in an urban railway tunnel, divided into six station sections, over a six-month period. Using 55 Bluetooth sensors, temperature data were collected from the mainline tracks, ventilation shafts, and station areas. The maintenance influence factors on defect quantities are identified in precise inspection for safety and diagnosis (PISD) conducted at 10, 15, and 20 years after the completion. Based on these PISD results, defect quantities were estimated, and relevant maintenance-related influencing factors were incorporated into the analysis. The study examined daily and monthly temperature distributions by section, temperature differences between the mainline and ventilation shafts, and temperature characteristics at various locations within the tunnel to identify correlations with different defect types. The relationship between temperature fluctuations in tunnels and defect occurrence is investigated. The analysis reveals that as the range of temperature variation increases, the amount of crack decreases, whereas the occurrence of leakage and efflorescence increases. These findings suggest that temperature distribution plays a significant role in the manifestation of tunnel defects, indicating the need for maintenance strategies that incorporate environmental temperature conditions for improved defect prediction and mitigation.

Keywords

Concrete lining defect

Temperature distribution

Maintenance

Bluetooth sensor

Precise inspection for safety and diagnosis (PISD)

터널 내 온도변화는 지상 구조물과 비교하여 크지 않지만 한냉지역에서는 동결융해, 지하수위가 높은 지역에서는 이음부에서 누수량 변화를 야기한다. 도심지 6개 정거장으로 구분되는 철도터널 내 본선, 환기구, 정거장 온도변화를 블루투스 센서 55개를 이용하여 6개월간 측정하였다. 해당 구간에 대해 준공 후 10년, 15년, 20년 정밀안전진단 결함 물량에 유지관리 영향 인자를 반영하여 분석하였다. 구간별 일별, 월별 온도분포, 본선과 환기구의 온도분포, 다양한 위치별 온도분포에 따른 결함 특성을 파악하고자 하였다. 본 연구는 결함별 물량 변동과 터널 내 온도분포의 상관관계를 분석하여 그 원인을 추정하였다. 터널 내 온도변화 폭이 증가함에 따라 균열은 감소하였으며 누수 및 백태는 증가하는 것으로 나타났다. 이는 온도분포의 변화가 터널 결함 발생 양상에 영향을 미친다는 점을 시사하며, 유지관리 전략 수립 시 온도 환경을 고려한 결함 예측 및 대응이 필요함을 보여준다.

키워드

콘리트라이닝 결함

온도 변화

유지관리

블루투스 센서

정밀안전진단

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Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 27
No :4
Pages :257-269
Received Date : 2025-05-19
Revised Date : 2025-06-09
Accepted Date : 2025-06-09
DOI :https://doi.org/10.9711/KTAJ.2025.27.4.257

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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