Wave-Induced Seabed Response and Liquefaction Around Pipeline at Different Buried Depths

doi:10.16183/j.cnki.jsjtu.2019.349

Abstract

Abstract:

In order to study the liquefaction of the seabed around the pipeline under wave loading, a two-dimensional numerical model was established based on Biot’s partly dynamic equation (u-p model). The dynamic response of the seabed around the pipeline under wave loading was investigated in detail, and the wave loading was applied on the seabed surface through pore pressure boundary. Based on the validation of the numerical model, the response and liquefaction of the seabed around the pipeline under wave loading were studied. The pore pressure, vertical effect stress, and liquefaction range of the seabed at different pipeline buried depths were investigated and the effects of wave height, soil permeability, and saturation were discussed. The results show that the pipeline buried depth has significant effects on the response and liquefaction of seabed under wave loading. The pipeline induces the vertical effective stress concentration of seabed around the pipeline. The effects of wave height, soil permeability, and saturation on the seabed response under wave loading are significant. The results provide a theoretical basis for the safety and stability of submarine pipeline in marine environment.

Key words: wave, seabed, pipeline, pore pressure, liquefaction, Biot’s equation

CLC Number:

P751

ZHANG Qi, ZHOU Xianglian, YE Guanlin. Wave-Induced Seabed Response and Liquefaction Around Pipeline at Different Buried Depths[J]. Journal of Shanghai Jiao Tong University, 2021, 55(5): 489-496.

Figures/Tables 12

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