Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Fire resistance assessment of segment lining with PP fiber amount

PP섬유 혼입량에 따른 세그먼트 라이닝의 화재저항성 평가

  • Choi, Soon-Wook (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae-Ho (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Chulho (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Hae Song (Kimpo and Paju Expressway 400 Section 2, Hyundai Construction) ;
  • Ahn, Byoungcheol (Kimpo and Paju Expressway 400 Section 2, Hyundai Construction) ;
  • Chang, Soo-Ho (Construction Industry Promotion Department, Korea Institute of Civil Engineering and Building Technology)
  • 최순욱 (한국건설기술연구원 지반연구본부) ;
  • 강태호 (한국건설기술연구원 지반연구본부) ;
  • 이철호 (한국건설기술연구원 지반연구본부) ;
  • 김해송 (현대건설(주) 고속도로 400호선 김포-파주 2공구 현장) ;
  • 안병철 (현대건설(주) 고속도로 400호선 김포-파주 2공구 현장) ;
  • 장수호 (한국건설기술연구원 건설산업진흥본부)
  • Received : 2021.08.24
  • Accepted : 2021.09.13
  • Published : 2021.09.30
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Abstract

With the high quality/high stiffness/high strength of segment lining, segment lining is increasingly used as the final lining of the tunnel. Precast concrete lining has higher quality and strength than field concrete. Paradoxically, this contributes to greater damage to concrete in the event of a fire in a tunnel. In this study, tests were conducted to determine the fire resistance performance of segment linings according to fiber content in fire resistance methods using synthetic fibers such as PP fibers. As a result, it was confirmed that fire resistance performance required by the relevant project can be secured when using 1.5 kg/m3 of PP fiber. In addition, comparison of the results of PP fibers with PET, a similar synthetic fiber, showed better fire resistance performance than when PP fibers were used.

세그먼트 라이닝의 고품질/고강성/고강도화에 따라 세그먼트 라이닝을 터널의 최종 라이닝으로 삼는 경우가 증가하고 있다. 프리캐스트 콘크리트 라이닝은 현장타설 콘크리트에 비해 품질 및 강도가 높다. 역설적으로 이러한 점은 터널 내 화재 시 콘크리트의 손상을 더 크게 하는 요인이 된다. 본 연구에서는 PP 섬유와 같은 합성섬유를 이용한 내화방법에서 섬유함유량에 따라 세그먼트 라이닝의 화재저항성능을 파악하기 위한 시험을 수행하였다. 그 결과, PP섬유 1.5 kg/m3 사용 시 관련 프로젝트에서 요구한 화재저항성능을 확보할 수 있음을 확인하였다. 더불어 유사한 함성섬유인 PET를 사용하였을 경우와 PP섬유의 결과를 비교한 결과, PP섬유가 PET섬유를 사용하였을 경우에 비해 더 좋은 화재저항성능이 나타냄을 알 수 있었다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원 민간수탁사업 "2021년 지반설계 정수산정 및 분석사업" 중 현대건설(주) 김포-파주 2공구 현장의 "PC세그먼트용 콘크리트 시험체 RABT화재시험"의 지원으로 수행되었습니다.

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