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An experimental study on bonding and bearing capacities of thin spray-on liner to evaluate its applicability as a tunnel support member

터널 지보재로서의 적용성 검토를 위한 박층 뿜칠 라이너의 부착성능과 지보성능의 평가

  • Han, Jin-Tae (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Park, Young-Taek (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Hwang, Gwi-Sung (SILKROAD T&D) ;
  • Choi, Myung-Sik (SILKROAD T&D) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • 한진태 (한국건설기술연구원 SOC성능연구소 GEO-인프라연구실) ;
  • 이규필 (한국건설기술연구원 SOC성능연구소 GEO-인프라연구실) ;
  • 박영택 (한국건설기술연구원 SOC성능연구소 GEO-인프라연구실) ;
  • 최순욱 (한국건설기술연구원 SOC성능연구소 GEO-인프라연구실) ;
  • 황귀성 ((주)실크로드티앤디) ;
  • 최명식 ((주)실크로드티앤디) ;
  • 장수호 (한국건설기술연구원 SOC성능연구소 GEO-인프라연구실)
  • Received : 2013.10.23
  • Accepted : 2013.11.04
  • Published : 2013.11.30

Abstract

The use of Thin Spray-on Liner (TSL) as an alternative to shotcrete has drastically increased since 1990s when it was first developed and introduced to mines. In this study, tensile strength test, bond strength test, compression test with specimens coated by TSL, and two kinds of bending tests proposed by EFNARC (2008) were performed with two kinds of TSLs with different material compositions in order to evaluate their support capacities. As a result, both TSLs were shown to be satisfactory for the minimum performance requirements for a structural rock support suggested by EFNARC (2008) and tensile strength of a TSL was shown to increase as its content of polymer was higher. In contrast, its bond strength was shown to increase proportional to the content of a cementitious component especially at the early age.

Acknowledgement

Grant : 운용 중 공간확장이 가능한 지하 굴착 및 안정화 기술 개발

Supported by : 한국건설기술연구원

References

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