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The Experimental Study on Transverse Field Joint Method of Precast Road Deck Slab of Double Deck Tunnel in Great Depth

대심도 복층터널 프리캐스트 중간슬래브의 횡방향 현장이음방식에 대한 실험연구

  • Lee, Doo-Sung (Hong-G Technical Reserch Institute) ;
  • Kim, Bo-Yeon (Hong-G Technical Reserch Institute) ;
  • Bae, Chul-Gi (Jin-An gun office, Department safety disaster) ;
  • Hur, Jae-Hun (Korea Expressway Corporation, Seo-Hae Bridge Security Center)
  • 이두성 ((주)홍지 기술연구소) ;
  • 김보연 ((주)홍지 기술연구소) ;
  • 배철기 (진안군청 안전재난과) ;
  • 허재훈 (한국도로공사 서해대교안전센터)
  • Received : 2016.08.19
  • Accepted : 2016.12.05
  • Published : 2017.02.28

Abstract

The joints between precast PSC slabs of the intermediate road slab in double deck tunnel are inevitably generated in the road traffic vehicle traveling direction. Therefore, it is important to make the behavior of parts on the joint in one piece. The imtermediate road slab system of double deck tunnel in great depth proposed in this study will be constructed with precast PSC slab in order to minimize the construction period. And the joint connection between the precast slab has been developed in two methods: the 'Transverse tendon reinforcement method' and 'High strength bolts connection method'. Also, the experiments were performed for the full scale model in order to evaluate the performance of the intermediate road deck slab with two type joints systems, the structural stability was verified through the F.E.M analsysis. The results of static loading test and F.E.M analysis investigated a very stable behavior of intermediate road deck slab in double deck tunnel applying the joint methods developed in this study, in the cracks and deflections to satisfy the design standards of Highway Roads Bridges (2011), it was determined that there is no problem even servicebility.

대심도 복층터널 구조물에서 중간슬래브 구조에 적용되는 형식중 하나인 프리캐스트 구조에서는 차량 진행 방향으로 이음이 발생한다. 따라서, 이 이음부를 일체로 거동하게 하는 것이 중요하다. 이 연구에서 제안하는 대심도 복층터널 중간슬래브는 터널의 공간 활용을 극대화 하기 위하여 프리스트레스를 도입한 보 형식의 구조체로, 'PS 이음방식'과 '볼트체결방식'에 대한 이음방법을 개발하였다. 또한, 두 가지 이음방식을 적용한 중간슬래브의 구조성능을 평가하기 위해서 실물모형 구조실험을 수행하였으며, Contact 모델을 적용한 FEM 해석을 통해서 구조적인 안정성을 검증하였다. 이음방식을 적용한 복층터널 중간슬래브의 정적재하실험 결과 매우 안정적인 거동을 보였으며, 균열 및 처짐에 있어 도로교설계기준(2011)을 만족하여 사용성에도 문제가 없다고 판단되었다. FEM 해석에 따른 중간슬래브의 거동은 실험과 비교하여 강성이 미소하게 크게 나타났으나 전체적인 거동이 거의 유사하게 나타났다. 따라서 이 연구에서 개발한 이음방법을 적용한 중간슬래브를 시공함에 있어 구조적으로 문제가 없을 것으로 판단된다.

Keywords

References

  1. Kim, B. Y., Lee, D. S., Kim, T. K., Bae, C. K. and Kim, J. G., "The Experimental Study on Transverse Field Connection Method of Precast Road Deck Slab of Double Deck Tunnel in Great Depth", Proceeding of the Korea Concrete Institute, KCI, Vol. 28, No. 1, 2016, pp. 125-126.
  2. Chung, C. H., Sung, Y. E., Hyun, B. H., and Park, S. J. "Experimental Study on Connectability of Half-Depth Precast Deck Panels with Loop Joint", Journal of the Korean Society of Civil Engineers, KSCE, Vol. 28, No. 4, 2008, pp. 581-509.
  3. Lee, D. S., Kim, T. K., and Chae, G. B., "The Experimental Study of Full-scale Optimized Composite Beam(OCB) Reinforced with Open Strands", Journal of the Korean Concrete Institute, Vol. 27, No. 5, 2015, pp. 471-480. https://doi.org/10.4334/JKCI.2015.27.5.471
  4. Lee, J. M., Lee, S. Y., Song, J. J., and Park, K. H., "Static Load Tests on Flexural Strength and Crack Serviceability of a Longitudinal Joint for the Slab-Type Precast Modular Bridges", Journal of the Korean Concrete Institute, Vol. 27, No. 2, 2015, pp. 137-145. https://doi.org/10.4334/JKCI.2015.27.2.137
  5. Samsung C&T., Development of Prestressed Precast Double-tee Slab System for Domestic Large Span Building, Report of Ministry of Science and Technology, 2000.
  6. Ministry of Land, Transport and Maritime Affairs, Korea building Code-Structural, 2009.
  7. Korean Concrete Institute, Design Specifications for Structural Concrete, 2012.
  8. Korean Society of Steel Construction, Korean Steel Structure Design Code and Commentary-Load and Resistance Factored Design, 2011.
  9. Midas IT, ANALYSIS & ALGORITHM, 2004.