DOI QR코드

DOI QR Code

Preliminary study on the ground behavior at shore connection of submerged floating tunnel using numerical analysis

  • Kang, Seok-Jun (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Jung-Tae (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Cho, Gye-Chun (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • 투고 : 2019.12.04
  • 심사 : 2020.03.03
  • 발행 : 2020.04.25

초록

Submerged floating tunnel (SFT) is a type of tunnel which causes the tunnel segments to float in the water. When the SFTs are connected to the ground, the connection between the SFT and the subsea bored tunnel is fragile due to the difference in behavioral characteristics between the two types of tunnels. Therefore, special design and construction methods are needed to ensure the stability of the area around the connection. However, since previous research on the stability of the connection site has not been undertaken enough, the basic step necessitates the evaluation of ground behavior at the shore connection. In this study, the numerical analysis targeting the shore connection between the subsea bored tunnel and the SFT was simulated. The strain concentration at the shore connection was analyzed by numerical simulation and the effects of several factors were examined. The results showed the instability in the ground close to the shore connection due to the imbalance in the behavior of the two types of tunnels; the location of the strain concentration varies with different environmental and structural conditions. It is expected that the results from this study can be utilized in future studies to determine weak points in the shore connection between the submerged floating tunnel and the subsea bored tunnel, and devise methods to mitigate the risks.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF), Ministry of Land, Infrastructure, and Transport (MOLIT)

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2017R1A5A1014883) and a grant (20SCIP-B105148-06) from the Construction Technology Research Program, funded by the Ministry of Land, Infrastructure, and Transport (MOLIT) of the Korean government.

참고문헌

  1. Chen, J.Y., Sun, S.N. and Wang, B.G. (2008), "Dynamic analysis for the tether of submerged floating tunnel", Chin. J. Comput. Mech., 25(4), 488-493.
  2. Do, N.A., Dias, D. and Oreste, P. (2018), "Numerical investigation of segmental tunnel linings-comparison between the hyperstatic reaction method and a 3D numerical model", Geomech. Eng., 14(3), 293-299. https://doi.org/10.12989/gae.2018.14.3.293.
  3. Hong, Y. and Ge, F. (2010), "Dynamic response and structural integrity of submerged floating tunnel due to hydrodynamic load and accidental load", Proc. Eng., 4, 35-50. https://doi.org/10.1016/j.proeng.2010.08.006.
  4. Itasca, F. (2013), Fast Lagrangian Analysis of Continua in 3 Dimensions. Online Manual.
  5. Jakobsen, B. (2010), "Design of the Submerged Floating Tunnel operating under various conditions", Proc. Eng., 4, 71-79. https://doi.org/10.1016/j.proeng.2010.08.009.
  6. Jin, C. and Kim, M. (2017), "Dynamic and structural responses of a submerged floating tunnel under extreme wave conditions", Ocean Syst. Eng., 7(4), 413-433. https://doi.org/10.12989/ose.2017.7.4.413.
  7. Kunisu, H., Mizuno, S., Mizuno, Y. and Saeki, H. (1994), "Study on submerged floating tunnel characteristics under the wave condition", Proceedings of the 4th International Offshore and Polar Engineering Conference, Osaka, Japan, April.
  8. Lee, J.Y., Jin, C. and Kim, M. (2017), "Dynamic response analysis of submerged floating tunnels by wave and seismic excitations", Ocean Syst. Eng., 7(1), 1-19. https://doi.org/10.12989/ose.2017.7.1.001.
  9. Mazzolani, F.M., Faggiano, B. and Martire, G. (2010), "Design aspects of the AB prototype in the Qiandao Lake", Proc. Eng., 4, 21-33. https://doi.org/10.1016/j.proeng.2010.08.005.
  10. Nilsen, B. and Palmstrom, A. (2001), "Stability and water leakage of hard rock subsea tunnels", Modern Tunn. Sci. Technol., 497502.
  11. Oh, S.H., Park, W.S., Jang, S.C. and Kim, D.H. (2013), "Investigation on the behavioral and hydrodynamic characteristics of submerged floating tunnel based on regular wave experiments", J. Kor. Soc. Civ. Eng., 33(5), 1887-1895. https://doi.org/10.12652/Ksce.2013.33.5.1887.
  12. Shi, P., Zhang, D., Pan, J. and Liu, W. (2016), "Geological investigation and tunnel excavation aspects of the weakness zones of Xiang'an subsea tunnels in China", Rock Mech. Rock Eng., 49(12), 4853-4867. https://doi.org/10.1007/s00603-016-1076-z.
  13. Xiao, J. and Huang, G. (2010), "Transverse earthquake response and design analysis of submerged floating tunnels with various shore connections", Proc. Eng., 4, 233-242. https://doi.org/10.1016/j.proeng.2010.08.027.
  14. Yan, H., Luo, Y. and Yu, J. (2016), "Dynamic response of submerged floating tunnel in the flow field", Proc. Eng., 166, 107-117. https://doi.org/10.1016/j.proeng.2016.11.573.
  15. Yarramsetty, P.C.R., Domala, V., Poluraju, P. and Sharma, R. (2019), "A study on response analysis of submerged floating tunnel with linear and nonlinear cables", Ocean Syst. Eng., 9(3), 219-240. https://doi.org/10.12989/ose.2019.9.3.219.
  16. Youshi, H. and Fei, G. (2010), "Dynamic response and structural integrity of submerged floating", Proc. Eng., 4, 35-50. https://doi.org/10.1016/j.proeng.2010.08.006.
  17. Zhang, J., Li, S., Li, L., Zhang, Q., Xu, Z., Wu, J. and He, P. (2017), "Grouting effects evaluation of water-rich faults and its engineering application in Qingdao Jiaozhou Bay Subsea Tunnel, China", Geomech. Eng., 12(1), 35-52. https://doi.org/10.12989/gae.2017.12.1.035.
  18. Zhang, K., Xiang, Y. and Du, Y. (2010), "Research on tubular segment design of submerged floating tunnel", Proc. Eng., 4, 199-205. https://doi.org/10.1016/j.proeng.2010.08.023.
  19. Zhou, X.J., Wang, Z.Y., Fan, Y.H. and Pan, J. (2012), "Safety study on connection joint for submerged floating tunnel", Appl. Mech. Mater., 170, 1708-1711. https://doi.org/10.4028/www.scientific.net/AMM.170-173.1708.
  20. Zingg, S. and Anagnostou, G. (2012), "Tunnel face stability in narrow water-bearing fault zones", Proceedings of the EUROCK 2012, the 2012 ISRM International Symposium-Rock Engineering and Technology for Sustainable Underground Construction, Stockholm, Sweden, May.