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

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical study on structural reinforced effects of concrete lining by spray-applied waterproofing membrane

차수용 박층 멤브레인 설치에 따른 콘크리트 라이닝의 구조적 보강효과에 관한 수치해석 연구

  • Lee, Chulho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Kicheol (Dept. of Civil and Environment Engineering, Incheon National University) ;
  • Kim, Dongwook (Dept. of Civil and Environment Engineering, Incheon National University) ;
  • Choi, Soon-Wook (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
  • 이철호 (한국건설기술연구원 지반연구소) ;
  • 이기철 (인천대학교 건설환경공학과) ;
  • 김동욱 (인천대학교 건설환경공학과) ;
  • 최순욱 (한국건설기술연구원 지반연구소) ;
  • 강태호 (한국건설기술연구원 지반연구소) ;
  • 장수호 (한국건설기술연구원 지반연구소)
  • Received : 2017.05.04
  • Accepted : 2017.05.23
  • Published : 2017.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

A spray-applied waterproofing membrane which consists of polymers has a relatively higher constructability and adhesion than the conventional sheet-type waterproofing materials. Additionally, the spray-applied waterproofing membrane generally shows a waterproofing ability as a composite structure with shotcrete or concrete lining. Because its purpose is waterproofing at the structure, structural effects were not well reported than waterproofing abilities. In this study, structural effects of the membrane-attached concrete lining were evaluated using 3-point bending test by the numerical method. From the analysis, a load-displacement behavior of the concrete lining and fracturing energy after yielding were compared with various conditions. Consequently, concrete lining with spray-applied waterproofing membrane shows higher flexural strength and fracturing energy than the single-layer concrete lining.

차수용 박층 멤브레인은 폴리머를 주요 구성성분으로 하는 재료로서 높은 부착성능과 시공성을 특징으로 하는 방수 재료이다. 차수용 박층 멤브레인은 일반적으로 콘크리트 또는 숏크리트 라이닝과 일체화되어 복합 구조체 형태로 방수 기능을 발현하는 재료이다. 본 연구에서는 지하구조물의 대표적인 구조물인 터널에서 차수용 박층 멤브레인 타설이 가능한 콘크리트 라이닝 재료에 차수용 박층 멤브레인을 적용할 경우 콘크리트 라이닝의 거동 변화를 수치해석적 방법으로 검토하였다. 콘크리트 라이닝의 거동은 3점 휨 시험을 수행하는 것으로 가정하고 이때 발생한 하중-변위 관계를 통해 콘크리트 라이닝의 최대 휨 하중 변화와 항복 이후 변화를 검토하는 방법으로 연구를 수행하였다. 해석결과, 콘크리트 라이닝에 차수용 박층 멤브레인 시공을 통해 고려할만한 보강효과를 확인하였다.

Keywords

References

  1. Abaqus (2011), Analysis user's manual, Ver. 6.10, Providence (RI, USA): Dassault Systemes Simulia Corp.
  2. Ahn, T. (2011), "Thermal and mechanical studies of TSL for concrete tunnel", Ph.D. Thesis, Electronic Thesis and Dissertation Repository, Paper 301, University of Western Ontario.
  3. Blazejowski, M. (2012), "Flexural behaviour of steel fibre reinforced concrete tunnel linings", MS Thesis, Electronic Thesis and Dissertation Repository. Paper 768, The University of Western Ontario, London, Ontario, Canada.
  4. Chang S., Lee, G-P., Han, J-T., Park Y-T. (2015), "Development of a powder-type thin spray-on liner and its performance evaluation at different curing ages", Tunnel & Undeerground Space, Vol. 25, No. 3, pp. 293-302 (in Korean) https://doi.org/10.7474/TUS.2015.25.3.293
  5. Choi, S-W., Kang, T-H., Chang, S-H., Lee, C., Kim, J., Choi, M-S. (2017), "A preliminary study of watertightness and salt water resistance of spray-applied membrane", J of Korean Tunn undergr Sp Assoc, Vol. 19, Issue 2, pp. 283-299. https://doi.org/10.9711/KTAJ.2017.19.2.283
  6. EFNARC (2008), Specification and Guidelines on Thin Spray-on Liners for Mining and Tunnelling.
  7. Holter, K.G. (2016), "Performance of EVA-Based membranes for SCL in hard rock", Rock Mech. Rock Eng., Vol. 49, 1329-1358. https://doi.org/10.1007/s00603-015-0844-5
  8. ITAtech (2013), "ITAtech design guidance for spray applied waterproofing membranes", ITAtech Activity Group Lining and Waterproofing, ITAtech Report No. 2.
  9. Lee, C., Chang, S-H, Lee, K., Kim, D. (2015), "Numerical study on contact behavior of TSL (Thin Spray-on Liner)", J of Korean Tunn undergr Sp Assoc, Vol. 17, No. 6, pp. 665-674. https://doi.org/10.9711/KTAJ.2015.17.6.665
  10. Lee, J., Fenves, G.L. (1998), "A plastic-damage concrete model for earthquake analysis of dams", Earthquake Engineering and Structural Dynamics, Vol. 27, pp. 937-956. https://doi.org/10.1002/(SICI)1096-9845(199809)27:9<937::AID-EQE764>3.0.CO;2-5
  11. Lubliner, J., Oliver, J., Oller, S., Onate, E. (1989), "A plastic-damage model for concrete", Int. J. Solids Struct., Vol. 25, No. 3, pp. 299-326. https://doi.org/10.1016/0020-7683(89)90050-4
  12. Makhlouf, R., Holter, K. (2008), "Rehabilitation of concrete lined tunnels using a composite sprayed liner with sprayed concrete and sprayable waterproofing membrane", Proc. of ITA World Tunnel Congress 2008, Agra, India, pp. 1175-1182.
  13. Mpunzi, P., Masethe, R., Rizwan, M., Stacey, T.R. (2015), "Enhancement of the tensile strengths of rock and shotcrete by thin spray-on liners", Tunnelling and Underground Space Technology, Vol. 49, pp. 369-375. https://doi.org/10.1016/j.tust.2015.05.013
  14. Nakashima, M., Hammer, A.L., Thewes, M., Elshafie, M., Soga, K. (2015), "Mechanical behaviour of a sprayed concrete lining isolated by a sprayed waterproofing membrane", Tunnelling and Underground Space Technology, Vol. 47, 143-152. https://doi.org/10.1016/j.tust.2015.01.004
  15. Ozturk, H., Guner, D. (2017), "Failure analysis of thin spray-on liner coated rock cores", Engineering Failure Analysis, Vol. 79, pp. 25-33. https://doi.org/10.1016/j.engfailanal.2017.03.024
  16. Tao, Y., Chen, J.F. (2015), "Concrete damage plasticity model for modeling FRP-to-concrete bond behavior", J. Compos. Constr, ASCE, Vol. 19, No. 1, pp. 1-13.
  17. Thomas, A. (2009), Sprayed Concrete Lined Tunnels, Taylor & Francis, London.
  18. Tyau, J.S. (2009), "Finite element modeling of reinforced concrete using 3-dimensional solid elements with discrete rebar", M.S. Thesis, Brigham Young Unicersity.
  19. Yu, X., Riahi, E., Entezarmahdi, A., Najafi, M., Sever, V.F. (2016), "Experimental and numerical analyses of strength of epoxy-coated concrete under different load configurations", Journal of Pipeline Systems Engineering and Practice, Vol. 7, No. 2, 04015024. https://doi.org/10.1061/(ASCE)PS.1949-1204.0000224