All Issue

2018 Vol.28, Issue 1 Preview Page

Research Article

Evaluation of Mechanical Performance of a Segment Lining coated by a Sprayed Waterproofing Membrane by a Full-scale Loading Test

실물 재하실험에 의한 뿜칠 방수 멤브레인이 타설된 세그먼트 라이닝의 역학적 성능 평가

Tae-Ho Kang1
,
Soon-Wook Choi1
,
Chulho Lee12
,
Byungkwan Park2
,
Jintae Kim3
,
Myung-Sik Choi3
,
Soo-Ho Chang12*
강 태호1
,
최 순욱1
,
이 철호12
,
박 병관2
,
김 진태3
,
최 명식3
,
장 수호12*
1Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology
2Smart City&Construction Engineering, University of Science and Technology (UST)
3Taean Factory, Silkroad T&D Co., Ltd.
1한국건설기술연구원 지반연구소
2과학기술연합대학원대학교(UST) 스마트도시·건설융합전공
3실크로드티앤디 태안공장
* 교신저자* Corresponding Author
1 February 2018. pp. 97-110
PDF XML Citation
Abstract

The application of sprayed waterproofing membrane with high adhesion and ductility is considered to be promising as a measure for repair and reinforcement of a tunnel structure. Therefore, a powder-type and one-component membrane prototype with high tensile and bond strengths was made in this study. Then, its reinforcement effect on a shield segment was evaluated by carrying out a series of full-scale loading tests of segment specimens on which the membrane was sprayed. From the tests, it was confirmed that the initial cracking loads increased by approximately 34% due to cracking retardation by membrane coating. Even though the increase of failure loads were not so high as cracking loads, the strain-softening behaviors were observed from specimens coated by the membrane. Therefore, it is expected that the membrane coated on the inner surface of a lining might be effective in preventing its brittle failure.

Keywords
Spray-applied waterproofing membrane
Segment, Lining
Full-scale test
Tunnel
Reinforcement

뿜칠 방수 멤브레인이 가진 높은 부착력과 연성 특성으로 인해 터널 구조물의 보수․보강 목적으로 멤브레인을 적용하는 방안이 고려되고 있다. 따라서 본 연구에서는 인장강도와 부착강도가 향상된 분말 1성분 멤브레인 시제품을 제작하였고, 이를 실물 세그먼트의 내측에 타설하여 실물 실험체를 제작하고 실물 재하실험을 통해 멤브레인의 보강효과를 파악하고자 하였다. 실험결과, 멤브레인의 코팅으로 인해 세그먼트의 균열 발생이 지연되어 세그먼트의 초기 균열발생하중이 평균적으로 약 34% 증가하였다. 반면, 멤브레인 코팅에 의한 파괴하중의 증가율은 상대적으로 크지 않았다. 단, 멤브레인의 코팅으로 인해 파괴하중 이후에 변형률 연화 현상이 관찰되어, 멤브레인으로 라이닝 내측을 코팅하게 될 경우에는 라이닝의 취성 파괴를 방지하는데 효과가 있을 것으로 추정된다.

키워드
뿜칠 방수 멤브레인
세그먼트
라이닝
실물 실험
터널
보강
References
1
Ahn, T., 2011, Thermal and Mechanical Studies of Thin Spray-On Liner (TSL) for Cconcrete Tunnel Linings, Ph.D. Thesis, University of Western Ontario, Canada.
2
ASTM, 2010, Standard Test Method for Tensile Properties of Plastics, D638-10.
3
ASTM, 2015, Standard Test Method for Rubber Property Durometer Hardness, ASTM D2240-15.
4
BS EN 1542:1999, 1999, Products and systems for the protection and repair of concrete structures - Test methods - Measurement of bound strength by pull-off.
5
Chang, S.-H., G.-P. Lee, J.-T. Han, S.-W. Choi, G.-S. Hwang and M.-S. Choi,. 2015, Development of a Power-type Thin Spray-on Liner and Its Performance Evalaution at Different Curing Ages, Tunnel &Underground Space, Vol. 25, No. 3, 293-302.
10.7474/TUS.2015.25.3.293
6
Chang, S.-H., S.-W. Choi, C. Lee, T.-H. Kang, G.-S. Hwang, J. Kim and M.-S. Choi,. 2016a, Development and Performance Evaluation of a Two-component Thin Spray-on Liner to Guarantee Its Homogeneous Qualities and to Reduce Dust, Tunnel &Underground Space, Vol. 26, No. 5, 441-453.
10.7474/TUS.2016.26.5.441
7
Chang, S.-H., T.-H. Kang, S.-W. Choi, C. Lee, G.-S. Hwang and M.-S. Choi,. 2016b, An Experimental Study on Fundamental Properties of a Sprayable Waterproofing Membrane, Tunnel &Underground Space, Vol. 26, No. 3, 220-234.
10.7474/TUS.2016.26.3.220
8
Choi, S.-W., T.-H. Kang, S.-H. Chang, C. Lee, J. Kim and M.-S. Choi, 2017a, A preliminary study of watertightness and salt water resistance of spray-applied membrane”, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 2, 283-299.
10.9711/KTAJ.2017.19.2.283
9
Choi, S.-W., T.-H. Kang, S.-H. Chang, C. Lee, M.-S. Choi and K. Kim, 2017b, Analysis of Water Penetration through Pores in Spray-applied Waterproofing Membrane Using X-ray CT Images, Journal of Korean Geosynthetics Society, Vol. 16, No. 4, 211-219.
10
Holter, K.G. and S. Geving, 2016, Moisture Transport Through Sprayed Concrete Tunnel Linings, Rock Mech. Rock Eng., Vol. 49, 243-272.
10.1007/s00603-015-0730-1
11
Holter, K.G., 2016, Performance of EVA-Based membranes for SCL in hard rock, Rock Mech. Rock Eng., Vol. 49, 1329-1358.
10.1007/s00603-015-0844-5
12
ITAtech, 2013, ITAtech design guidance for spray applied waterproofing membranes, ITAtech Activity Group Lining and Waterproofing, ITAtech Report No. 2.
13
Kangnamchem, 2018, http://kangnamchem.com/eng/product/ polyurea/
14
Lee, C., K. Lee, D. Kim, S.-W., Choi, T.-H. Kang and S.-H. Chang, 2017, Numerical study on structural reinforced effects of concrete lining by spray-applied waterproofing membrane, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 3, 551-565.
10.9711/KTAJ.2017.19.3.551
15
Lee, G.-P., G.-J. Bae, D.-Y. Moon, T.-S. Kang and S.-H. Chang, 2013, Evaluation of steel fiber reinforcement effect in segment lining by full scale bending test, Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, 215-223.
10.9711/KTAJ.2013.15.3.215
16
Lee, G.-P., G.-J. Bae, T.-S. Kang, S.-H. Chang and S.-W. Choi, 2014, Analysis of segment lining cracking load considering axial force by varying boundary condition, Journal of Korean Tunnelling and Underground Space Association, Vol. 16, No. 2, 173-180.
10.9711/KTAJ.2014.16.2.173
17
Lee, G.-P., Y.-T. Park, S.-W. Choi, G.-J. Bae, S.-H. Chang, T.-S. Kang and J.-S. Lee, 2012, An experimental study on mechanical behavior of shield segment with high-strength concrete and high-tension bar, Journal of Korean Tunnelling and Underground Space Association, Vol. 14, No. 3, 215-230.
10.9711/KTAJ.2012.14.3.215
18
Makhlouf, R. and K. Holter, 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, 1175-1182.
19
Stubberfield, K., 2016, Masterseal 345® Application Course – Lecture Material, Tunnelling &Underground Construction Academy (TUCA), London, April 13, 2016.
20
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, 57-73.
21
Thomas, A., 2009, Sprayed Concrete Lined Tunnels, Taylor &Francis, London.
Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 28
  • No :1
  • Pages :97-110
  • Received Date : 2018-01-31
  • Revised Date : 2018-02-05
  • Accepted Date : 2018-02-05
  • DOI :https://doi.org/10.7474/TUS.2018.28.1.097
Journal Informaiton Tunnel and Underground Space Tunnel and Underground Space
Online Submission
Archives
: Vol.27, 2017 ~
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close