Evaluation of waterproof and durability of hydrophilic waterstop

Woo-Yong Choi; Hyeun-Pil Lee; Gy-Chan Jun; Seok-Won Lee

doi:10.9711/KTAJ.2014.16.2.117

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2014 Vol.16, Issue 2 Next Page

Evaluation of waterproof and durability of hydrophilic waterstop 수팽창 지수재의 방수 성능 및 내구성 평가

31 March 2014. pp. 117-124

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Abstract

The interest in the use of shield TBM (Tunnel Boring Machine) on the tunnel excavation has been increased rapidly in Korea. The shield TBM tunnel is generally designed as non-drainage tunnel. Consequently, if water leakage through the segment joints happens, big problems on the usage and stability of tunnel can be occurred. In this study, the variation of waterproof capacity of hydrophilic waterstop by the construction error and excessive displacement of segment was studied firstly. Secondly, the decrease of durability of hydrophilic waterstop by the sulphate and chloride contained in the groundwater and seawater was investigated. The results showed that if the angle discordance at the segment joints is beyond the 2 degree, the proper waterproof capacity of hydrophilic waterstop can not be guaranteed. In addition, if the hydrophilic rubber waterstop is exposed to the sulphate for a while, the proper durability of hydrophilic waterstop can not be expected.

Keywords

Hydrophilic waterstop

Waterproof

Durability

Sulphate

Chloride

최근 국내에서는 쉴드 TBM (Tunnel Boring Machine)을 이용한 터널 굴착에 대한 관심이 크게 증가하고 있다. 쉴드 TBM 터널은 비배수 터널로써 세그먼트 이음부에서 누수가 발생할 경우에는 터널의 사용성 및 안정성에 문제가 될 수 있다. 본 연구에서는 첫째로 쉴드 TBM 터널의 세그먼트 시공 시 시공오차 및 세그먼트 과다변형에 의한 수팽창 지수재의 방수 성능 변화를 알아보았고, 두 번째로 지하수와 해수에 있을 수 있는 황산염과 염화물에 의한 수팽창 지수재의 내구성 저하를 알아보았다. 시험결과, 체결각 불합치가 2°이상으로 시공 오차가 발생한 경우에는 수팽창 지수재의 차수 능력을 기대하기는 어려운 것으로 판단된다. 또한 수팽창 지수재가 황산마그네슘 용액에 장시간 노출될 경우에는 지수재의 내구 성능에 문제가 있을 수 있을 것으로 판단된다.

키워드

수팽창 지수재

방수 성능

내구성

황산염

염화물

References

1.Ahn, S.I. (2005), “Analyses of ground-water by impacts of tunneling”, Master dissertation, Kyungpook National University, Daegu, Korea.

2.Hyun, K.C., Min, S.Y., Moon, J.B., Jeong, G.H., Lee, I.M. (2012), “Risk management applicable to shield TBM tunnel: Ⅰ. Risk factor analysis”, J. of Korean Tunnelling and Underground Space Association, Vol. 14, No. 6, pp. 667-681.

3.Kim, Y.I., Hencher, S.R., Yoon, Y.H., Cho, S.K. (2002), “Determination of the construction method for Young Dong tunnel by risk assessment”, J. of Korean Tunnelling and Underground Space Association, Vol. 4, No. 2, pp. 13-25.

4.Kim, S.H., Kim, W.K., Lee, H.Y. (2013), “Effect of segment thickness during shield TBM tunnelling in case study”, J. of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 311-320.

5.Lee, S.W., Jeoung, J.H., Hwang, J.H. (2009), “Evaluation of hydrophilic waterstop for shield TBM tunnel under high water pressure”, Proc. of Korean Geo-Environmental Conference, Seoul, Korea, pp. 389-392.

6.Shin, Y.S. (2008), “Study on hydraulic tunnel-ground interaction”, Ph.D dissertation, Konkuk University, Seoul, Korea.

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 : 16
No :2
Pages :117-124
Revised Date : 2014-02-10
Accepted Date : 2014-02-25
DOI :https://doi.org/10.9711/KTAJ.2014.16.2.117

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

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