Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Performance Study of High-Performance Synthetic Supporting Materials by Real-Scale Tests

실대형 시험을 통한 고성능 합성지보재의 성능 고찰

  • Kang, Tae-Ho (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Chang, Soo-Ho (Construction Industry Promotion Department, Korea Institute of Civil Engineering and Building Technology) ;
  • Choi, Soon-Wook (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)
  • 강태호 (한국건설기술연구원 지하공간안전연구센터) ;
  • 장수호 (한국건설기술연구원 건설산업진흥본부) ;
  • 최순욱 (한국건설기술연구원 지하공간안전연구센터) ;
  • 이철호 (한국건설기술연구원 지하공간안전연구센터)
  • Received : 2021.12.02
  • Accepted : 2021.12.14
  • Published : 2021.12.31
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Abstract

A spray-on membrane is a material composed of a polymer, and is a spray-type material that is expected to be able to replace materials such as existing shotcrete or sheet membrane for support or waterproofing purposes. In the previous studies, it is expected that the thickness of the support material such as shotcrete can be reduced if the spray-on membrane is additionally installed on the existing cement-based support materials. In this study, a three-point bending test was performed by a spray-on membrane on the high-performance shotcrete on the outside, and comparison was made between the case where high-performance shotcrete and a spray-on membrane were installed. As a result of comparing the values calculated through the standard test and the real-size bending test, there was no significant difference in terms of flexural strength, but it was found that there was a difference in flexural toughness.

뿜칠 멤브레인은 폴리머로 구성된 재료로서 지보 또는 차수 목적으로 기존 방수포와 같은 재료를 대체 할 수 있을 것으로 기대되는 뿜어 붙이는 방식의 재료이다. 이전의 해외 연구에서 기존 시멘트계 지보 재료들에 추가로 뿜칠 멤브레인을 시공할 경우 숏크리트와 같은 지보재의 시공 두께를 줄일 수 있을 것으로 기대하고 있으나 국내에서는 아직까지 실험이나 분석 결과가 많이 보고되고 있지 못하다. 본 연구에서는 고성능 숏크리트에 뿜칠 멤브레인을 바깥면에 타설하여 3점 휨시험을 수행하고 고성능 숏크리트와 뿜칠 멤브레인이 시공된 경우를 비교하여 분석하였다. 실내 표준 시험과 실대형 휨시험을 통해 산정된 값을 서로 비교한 결과 휨강도 측면에서는 큰 차이를 보이지 않았으나 휨인성 부분에서 차이를 보이는 것으로 나타났다.

Keywords

Acknowledgement

본 연구는 국토교통부 국토교통과학기술진흥원'지하공간 활용 도시기반 복합플랜트 실증연구 사업'의 "환경 기초 복합플랜트 지하공간 활용 기술(과제번호 21UGCP-B157962-02)" 과제에 의해 수행 되었으며 이에 감사드립니다.

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