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Failure mechanism of submarine slopes based on the wave flume test

  • Min ZhangEmail author
  • Weilong Zhang
  • Yu Huang
  • Yuelou Cai
  • Shiwei Shen
Original Paper
  • 56 Downloads

Abstract

Although submarine landslides rarely occur in shallow or coastal areas, they are intensely violent and dangerous, causing serious damage to submarine structures and cables and drilling platforms. In this study, simulation experiments in the wave flume reveal that the submarine sand slope will oscillate, disperse, and form sand grains under the action of waves. In addition, the erosion depth of the wave on the seabed gradually deepens over time. Water depth decreases gradually. When the water depth reaches a certain depth, the erosion reaches a critical state. In combination with previous studies, the failure conditions and failure mechanisms of submarine slopes under wave action are analyzed, and a mechanism is proposed for the submarine slope failure induced by liquefied flow slip failure, shear failure, and shallow erosion failure. The risk of shear failure on the seabed is considered greater than that of liquefaction under wave action. Under shear failure, the seabed slope experiences a nearly complete liquefaction damage. By contrast, for shallow erosion damage, the structure of the seabed soil loosens, and the related strength becomes lower than that of the surrounding soil.

Keywords

Submarine slope Wave action Failure mechanism Model test 

Notes

Acknowledgements

This work was supported by the National Science Foundation of China (Grant No. 41502322, 41502270), the China Postdoctoral Science Foundation (Grant No. 2014M551453), and Science and technology development project of Jilin Province, China (Grant No. 20180520073JH). The authors would like to thank all the crew of the comprehensive laboratory of water conservancy port of Tongji University for their generous help.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.College of Construction EngineeringJilin UniversityChangchunChina
  2. 2.Department of Geotechnical Engineering, College of Civil EngineeringTongji UniversityShanghaiChina
  3. 3.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of EducationTongji UniversityShanghaiChina

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