Study on the Influence of Nonlinear Seepage and Grouting Reinforcement on Surrounding Rock in Subsea Tunnel

He, X.; Zhou, X.; Xu, Y.; Ma, W., and Wu, T., 2020. Study on the influence of nonlinear seepage and grouting reinforcement on surrounding rock in subsea tunnel. In: Liu, X. and Zhao, L. (eds.), Today's Modern Coastal Society: Technical and Sociological Aspects of Coastal Research. Journal of Co...

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Bibliographic Details
Published in:Journal of coastal research 2020-12, Vol.111 (sp1), p.162-167
Main Authors: He, Xiaonan, Zhou, Xiaomin, Xu, Yan, Ma, Wenzhu, Wu, Tao
Format: Article
Language:English
Subjects:
analytical modeling
Bearing capacity
Coastal inlets
Coastal research
Coasts
Darcys law
Drainage
Dredging
Environmental law
Exact solutions
Excavation
Fields
Grouting
grouting reinforcement
nonlinear seepage
Ocean floor
Permeability
Pore pressure
Reinforcement
Rock
Rocks
Seepage
Sociology
Stress distribution
Subsea tunnel
Tunnels
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Summary:He, X.; Zhou, X.; Xu, Y.; Ma, W., and Wu, T., 2020. Study on the influence of nonlinear seepage and grouting reinforcement on surrounding rock in subsea tunnel. In: Liu, X. and Zhao, L. (eds.), Today's Modern Coastal Society: Technical and Sociological Aspects of Coastal Research. Journal of Coastal Research, Special Issue No. 111, pp. 162–167. Coconut Creek (Florida), ISSN 0749-0208. Seepage is an important problem of tunneling engineering, which shows nonlinear characteristics in the low permeability media. Particularly in the seabed environment, Darcy's law is not accurate when considering the design of grouted subsea tunnels. Therefore, in this article, an analytical model considering nonlinear seepage and grouting reinforcement is established. Under a series of conditions, the analytical solutions of seepage fields and stress fields are derived and verified by numerical calculation. Then the influence of nonlinear seepage and grouting reinforcement on the pore pressure and effective stress of surrounding rock is investigated, and tunnel drainage is also discussed. The results indicate that tunnel excavation under nonlinear seepage is safer than that under linear Darcy's seepage, and grouting is a significant support that can not only improve the bearing capacity of surrounding rock, but also effectively reduce tunnel drainage.
ISSN:0749-0208
1551-5036
DOI:10.2112/JCR-SI111-027.1