All Issue

2013 Vol.15, Issue 6 Preview Page
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

Jin-Tae Han1
,
Gyu-Phil Lee2
,
Young-Taek Park2
,
Soon-Wook Choi3
,
Gwi-Sung Hwang4
,
Myung-Sik Choi5
,
Soo-Ho Chang6*
한 진태1
,
이 규필2
,
박 영택2
,
최 순욱3
,
황 귀성4
,
최 명식5
,
장 수호6*
1Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Senior Researcher
2Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Senior Researcher
3Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Research Specialist
4SILKROAD T&D, Senior Research Engineer
5SILKROAD T&D, Executive Engineer
6Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Research Fellow
1한국건설기술연구원 SOC성능연구소 GEO-인프라연구실 수석연구원
2한국건설기술연구원 SOC성능연구소 GEO-인프라연구실 수석연구원
3한국건설기술연구원 SOC성능연구소 GEO-인프라연구실 전임연구원
4(주)실크로드티앤디 주임연구원
5(주)실크로드티앤디 상무이사
6한국건설기술연구원 SOC성능연구소 GEO-인프라연구실 연구위원
*교신저자. *Corresponding Author. 
30 November 2013. pp. 571-583
PDF XML Citation
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.

Keywords
Thin spray-on liner
Polymer
Bearing capacity
Bonding
Tensile strength

박층 뿜칠 라이너(Thin Spray-on Liner, TSL)는 1990년대에 개발되어 광산에 처음 적용된 이후로 숏크리트의 대체 재료로서의 활용이 증가하고 있다. 본 연구에서는 폴리머 함량이 다른 두 가지 TSL 재료에 대하여 인장강도시험, 부착강도시험, TSL 코팅 시험편에 대한 압축강도시험 및 EFNARC(2008)에서 제안한 TSL의 지지 성능평가 시험을 수행하여 지보재로서 사용하기 위한 TSL의 역학적 성능을 평가하였다. 실험결과, 본 연구에서 사용된 두 가지 재료 모두 지보재로서의 최소 성능 규정은 만족하는 것으로 나타났으며, 특히, 폴리머 성분이 높을수록 인장강도가 증가하는 반면, 시멘트계 성분이 높을수록 상대적으로 초기 재령에서 부착강도가 크게 나타남을 실험적으로 확인하였다.

키워드
박층 라이너
폴리머
지지 성능
부착력
인장강도
References
1
1.ASTM (2010), Standard Test Method for Tensile Properties of Plastics, D638-10.
2
2.Archibald, J.F. (2004), “Chapter 4. canadian laboratory and field testing”, Surface Support in Mining, Y. Povin, D. Stacey and J. Hadjigeorgiou (eds), Australian Centre for Geomechanics, pp. 73-87.
3
3.Chang, S.-H., Lee, G.-P., Han, J.-T., Park, Y.-T., Choi, S.-W., Hwang, G.-S., Choi, M.-S. (2013), “An experimental study on the evaluation of Early- age mechanical properties of Polymer-based thin Spray-on liners”, Tunnel and Underground Space, Journal of Korean Society for Rock Mechanics, Vol. 23, No. 5, pp. 413-427.
4
4.Clements, M.J. (2002), “The future of fibre reinforced sprayed concrete”, Proc. the 4th Int. Symp. on Sprayed Concrete, Norwegian Concrete Association, pp. 73-81.
5
5.EFNARC (1996), European Specification for Sprayed Concrete.
6
6.EFNARC (2008), Specification and Guidelines on Thin Spray-on Liners for Mining and Tunnelling.
7
7.Lau, V., Saydam, S., Cai, Y., Mitra, R. (2008), “Laboratory investigation of support mechanism for thin Spray-on liners”, Proceedings of the 12th International Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), Goa, India, pp. 1381-1388.
8
8.Povin, Y., Stacey, D., Hadjigeorgiou, J., Yilmaz, H. (2004), “Part 1: thin Spray-on liners(TSLs)-A quick reference guide”, Surface Support in Mining, Y. Povin, D. Stacey and J. Hadjigeorgiou (eds), Australian Centre for Geomechanics, pp. 3-43.
9
9.Roberts, R. (2001), “Time to look below the surface of membranes”, Australian Mining Monthly, August, pp. 62-63.
10
10.Tannant, D.D. (2001), “Thin Spray-on liners for underground rock support”, Proceedings of the 17th International Mining Congress and Exhibition of Turkey - IMCET 2001, pp. 57-73.
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 : 15
  • No :6
  • Pages :571-583
  • Received Date : 2013-10-23
  • Revised Date : 2013-10-29
  • Accepted Date : 2013-11-04
  • DOI :https://doi.org/10.9711/KTAJ.2013.15.6.571
Journal Informaiton Journal of Korean Tunnelling and Underground Space Association Journal of Korean Tunnelling and Underground Space Association
Online Submission & Review System
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close