- 권한신청
- P-ISSN2233-8292
- E-ISSN2287-4747
- KCI
ISSN : 2233-8292
한랭지역에서 운영 중인 터널의 누수처리를 위한 유도배수시스템의 장기 성능 평가
Long-term performance of drainage system for leakage treatment of tunnel operating in cold region
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초록
본 연구의 목적은 한랭지역에서 운영 중인 터널구조물의 누수를 유도배수하기 위하여 기존 유도배수시스템을 향상시키는 것이다. 유도배수시스템은 유도배수판, 방수재료인 Hotty-gel, Hotty-gel 돌출 방지판, 공압타카, 고정핀, 집수관, 유도배수관, 철망 및 뿜어 붙임 모르타르로 구성되어 있다. 유도배수시스템은 현장 적용성 및 시공성을 평가하기 위하여 재래식 콘크리트 라이닝 터널에서 시험 시공되었다. 재령 7일, 14일, 21일, 28일, 2개월, 3개월, 4개월, 5개월, 6개월, 7개월및 8개월에 약 1,000 ml의 붉은색 물을 유도배수시스템 배면에 주입하여 유도배수시스템의 방수과 유도배수 성능을 평가하였다. 현장 성능 평가 실험이 진행된 8개월 동안 터널이 위치한 지역의 일일 평균 온도는 -16.0~25.6°C로 측정되었고, 일일 최저 온도는 -21.3°C, 일일 최고 온도는 30.8°C였다. 유도배수시스템의 유도배수판에서는 누수가 발생하지 않았지만 재령 14일부터 유도배수관에서 누수가 발생하였다. 유도배수관 누수는 고압의 공압타카와 고정핀 사용으로 두께 0.2 cm인 연성플라스틱 재질의 유도배수관이 변형되었고, 누수 방지를 위한 Hotty-gel의 두께와 폭이 충분하지 않아서 발생한 것으로 판단된다.
- keywords
- 터널, 누수, 유도배수, 방수, 한랭지역, Tunnel, Leakage, Drainage, Waterproof, Cold region
Abstract
The objective of this study is to develop the existing drainage system for catching the partial leakage of tunnel structures operating in cold region. The drainage system consists of drainage board, Hotty-gel as a waterproofing material, cover for preventing protrusion of Hotty-gel, air nailer, fixed nail, pipe for collecting ground leak, pipe for conveying ground leak, wire-mesh, and sprayed cement mortar. The drainage systems were installed in conventional concrete lining tunnels to evaluate the site applicability and constructability. The performances of waterproof and the drainage in the drainage system were evaluated by injecting 1,000 ml of red water in the back of the drainage system at 7 days, 14 days, 21 days, 28 days, 2 months, 3 months, 4 months, 5 months, 6 months, 7 months and 8 months. During 8 months of field test, the average daily temperature of the tunnel site was measured from -16.0°C to 25.6°C. The daily minimum temperature was -21.3°C and the daily maximum temperature was 30.8°C. There was no problem in waterproof and drainage performance of the drainage board in the drainage system. However, the pipe for conveying ground leak had the leakage problem from 14 days. It is considered that the leakage of the pipe for conveying ground leak was caused by the deformation of the pipe of the flexible plastic material having a thickness of 0.2 cm by using the high pressure air nailer and the fixing pin and the insufficient thickness and width of the hotty-gel for preventing the leakage.
- keywords
- 터널, 누수, 유도배수, 방수, 한랭지역, Tunnel, Leakage, Drainage, Waterproof, Cold region
참고문헌
1. Cheong, H.M. (2013), “Degree of damage risk by freeze and thaw of concrete structures in Korea”, Proceeding of the Korea Concrete Institute, Vol. 25, No. 1, pp. 89-90.
2. Federal Highway Administration & Federal Transit Administration (2004), Highway and Rail Transit tunnel maintenance and rehabilitation manual, pp 4-1~4-19.
3. Federal Highway Administration (2015), Tunnel Operations maintenance inspection Evaluation (TOMIE)manual, pp 3-1~3-20.
4. http://www.weather.go.kr/weather/climate/past_cal.jsp?stn=221&yy=2018&mm=1&obs=1&x=21&y=8
5. Hwang, Y.C. (2013), “Maintenance characteristics of geotechnical structures in cold region for freeze damage analysis”, Journal of the Korean Geo-Environmental Society, Vol. 14, No. 3, pp. 35-40.
6. Kim, D.G., Yim, M.J. (2017a), “Development and performance verification of induced drainage method for leakage treatment in existing underground structures”, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 3, pp. 533-549.
7. Kim, D.G., Yim, M.J. (2017b), “Improvement of existing drainage system for leakage treatment in exiting underground structures”, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 4, pp. 669-683.
8. Kim, D.G., Yim, M.J. (2017c), “Effect of freezing and thawing on the drainage system for leakage treatment”, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 6, pp. 1059-1075.
9. Koh, K.T. (2001). “Design and preventive measures for frost resistance of concrete”, Magazine of the Korea Concrete Institute, Vol. 13, No. 6, pp. 44-51.
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