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Article

On the Slope Stability of the Submerged Trench of the Immersed Tunnel Subjected to Solitary Wave

1
Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China
2
School of Civil Engineering, Sun Yat-Sen University, Guangzhou 510275, China
*
Author to whom correspondence should be addressed.
Academic Editor: Giovanni Besio
J. Mar. Sci. Eng. 2021, 9(5), 526; https://doi.org/10.3390/jmse9050526
Received: 19 March 2021 / Revised: 5 May 2021 / Accepted: 7 May 2021 / Published: 13 May 2021
(This article belongs to the Special Issue Structure-Seabed Interactions in Marine Environments)
Wave is a common environmental load that often causes serious damages to offshore structures. In addition, the stability for the submarine artificial slope is also affected by the wave loading. Although the landslide of submarine slopes induced by the waves received wide attention, the research on the influence of solitary wave is rare. In this study, a 2-D integrated numerical model was developed to investigate the stability of the foundation trench under the solitary wave loading. The Reynolds-averaged Stokes (RANS) equations were used to simulate the propagation of a solitary wave, while the current was realized by setting boundary inlet/outlet velocity. The pore pressure induced by the solitary wave was calculated by Darcy’s law, and the seabed was characterized by Mohr–Coulomb constitutive model. Firstly, the wave model was validated through the comparison between analytical solution and experimental data. The initial consolidation state of slope under hydrostatic pressure was achieved as the initial state. Then, the factor of stability (FOS) for the slope corresponding to different distances between wave crest and slope top was calculated with the strength reduction method. The minimum of FOS was defined as the stability index for the slope with specific slope ratio during the process of dynamic wave loading. The parametric study was conducted to examine the effects of soil strength parameters, slope ratio, and current direction. At last, the influence of upper slope ratio in a two-stage slope was also discussed. View Full-Text
Keywords: slope stability; immersed tunnel; solitary wave; foundation trench; numerical modeling slope stability; immersed tunnel; solitary wave; foundation trench; numerical modeling
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MDPI and ACS Style

Chen, W.; Wang, D.; Xu, L.; Lv, Z.; Wang, Z.; Gao, H. On the Slope Stability of the Submerged Trench of the Immersed Tunnel Subjected to Solitary Wave. J. Mar. Sci. Eng. 2021, 9, 526. https://doi.org/10.3390/jmse9050526

AMA Style

Chen W, Wang D, Xu L, Lv Z, Wang Z, Gao H. On the Slope Stability of the Submerged Trench of the Immersed Tunnel Subjected to Solitary Wave. Journal of Marine Science and Engineering. 2021; 9(5):526. https://doi.org/10.3390/jmse9050526

Chicago/Turabian Style

Chen, Weiyun, Dan Wang, Lingyu Xu, Zhenyu Lv, Zhihua Wang, and Hongmei Gao. 2021. "On the Slope Stability of the Submerged Trench of the Immersed Tunnel Subjected to Solitary Wave" Journal of Marine Science and Engineering 9, no. 5: 526. https://doi.org/10.3390/jmse9050526

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