An Experimental Study of Polypropylene Fiber for the Prevention of Explosive Spalling of Tunnel Concrete Lining

Nag Young* Kim; Jae Won Shim; Jong Sung Shim; Jong Phil Won

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2005 Vol.7, Issue 4 Preview Page Next Page

An Experimental Study of Polypropylene Fiber for the Prevention of Explosive Spalling of Tunnel Concrete Lining 터널 콘크리트 라이닝 폭열 방지를 위한 폴리프로필렌 섬유 혼입율 분석 연구

31 December 2005. pp. 323-333

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Abstract

Recently the fire is happening at the tunnel and underground - structure internationally. We are socially the economy the actual circumstances which serious loss is happening due to an fire occurrence when fire happened which is closed like tunnel and underground - structure, the collapse from the burglar degradation of strength of tunnel concrete lining and human life damage happen. It causes big problem while the long time disconnects a traffic network. While the fire happened in this research at the tunnel, the paper construct a basis data to deduce the specification regulation about stability of tunnel concrete lining. In this paper, the experiment was carried out for the prevention of explosive spalling of tunnel to use a reinforced Polypropylene concrete which mixes a Polypropylene which are known for the thing by being efficient at a protect of explosive spalling of the concrete. According to the firproof test result of reinforced Polypropylene admixture mortar, Polypropylene admixture of prevention of explosive spalling analyzed 0.2%-0.25%.

Keywords

Explosive spalling

polypropylene

tunnel fire

fireproof test

최근 세계적으로 터널 및 지하구조물에 대형화재가 발생하고 있으며 이로 인해 경제 ･ 사회적으로 심각한 손실이 발생하고 있는 실정이다. 이처럼 폐쇄된 공간인 터널 및 지하구조물내 화재 발생 시 구조체의 강도저하로 인한 붕괴 및 인명피해 뿐만 아니라 사회기반시설인 교통망을 장시간 끊어놓게 되는 등 큰 문제를 야기한다. 이에 본 연구에서는 터널에 화재 발생시 구조물 안정성에 대한 한국도로공사 관련 시방 규정을 도출하기 위한 기초 자료를 구축하는 것으로서 콘크리트의 폭열 방지에 효과적인 것으로 알려져 있는 폴리프로필렌 섬유를 혼입한 폴리프로필렌 섬유보강 콘크리트를 이용하여 터널내 화재시 터널 콘크리트 라이닝의 폭열 현상에 대한 방지를 위한 실험을 실시하였다. 본 연구결과 폴리프로필렌 섬유의 혼입률에 따른 모르타르의 내화시험결과를 토대로 폭열이 일어나지 않는 폴리프로필렌 섬유 혼입률을 0.2%~0.25% 인 것으로 분석되었다.

키워드

폭열현상

폴리프로필렌

터널화재

내화시험

References

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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 : 7
No :4
Pages :323-333

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

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