Laboratory experimental study of ocean waves propagating over a partially buried pipeline in a trench layer

Sun, Ke; Zhang, Jisheng; Gao, Yuan; Jeng, Dong‐Sheng; Guo, Yakun; Liang, Zuodong

doi:10.1016/j.oceaneng.2019.01.022

Cited by 47 publications

(29 citation statements)

References 52 publications

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“…The problem of wave-seabed interactions in the vicinity of a submarine pipeline has been studied since the 1980s, based on the poro-elastic theory including wave experimental studies [28] and numerical modeling [29,30] for wave loading. Recently, some studies considered both wave and current loading and the pipeline in a trenched layer [26,31].…”

Section: Cfd Model (Poro-fssi-foam)mentioning

confidence: 99%

“…Input data used in the validation with Turcotte et al [28] and Cheng and Liu [29]. The second validation of the seabed model is for the case of a half buried pipeline in a trenched layer [31]. In their experiments, a sediment basin with the size of 2 × 1 × 0.58 m (L × W × D) was used to explore the seabed response around the pipeline.…”

Section: Validations Of the Seabed Modelmentioning

confidence: 99%

“…• Validation of seabed model #1: Comparison with the laboratory experimental data with a fully buried pipeline in a seabed [28] and the boundary element model [29]. • Validation of seabed model #2: Comparison with the wave flume tests for the seabed model with a trenched layer [31].…”

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confidence: 99%

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The Role of 2D Seepage on Sediment Incipient Motion around a Pipeline

Zhai

Jeng

Guo

2021

JMSE

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Pipelines have been used as one of the main transportation methods for the offshore industry, with increasing activities in marine resources recently. Prediction of seabed instability is one of key factors that must be taken into consideration for an offshore pipeline project. As the first step of the scour process, sediment incipient motion has been intensively studied in the past. Most previous investigations didn’t consider the wave-induced seepage in the elevation of sediment motion. In this paper, two-dimensional seepage was considered to modify the conventional Shields number and its associated impact on sediment incipient motion around the trenched pipeline was investigated. Both flat and sloping seabeds are considered. The numerical results indicated that a peak or valley of the modified Shields number was formed below the pipeline and horizontal seepage flow tremendously impact the sediment motion in the vicinity of the pipeline. Parametric analysis concludes: the influence of the seepage around the pipeline becomes more significant in a large wave, shallow water in a seabed with large shear modulus and permeability, and larger pipeline diameter and smaller flow gap ratio. This will make soil particles be more easily dragged away from the seabed.

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Section: Cfd Model (Poro-fssi-foam)mentioning

confidence: 99%

Section: Validations Of the Seabed Modelmentioning

confidence: 99%

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The Role of 2D Seepage on Sediment Incipient Motion around a Pipeline

Zhai

Jeng

Guo

2021

JMSE

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“…49 (d t =0.2 m; d b =0.05 m) Comparison of wave-induced pore pressure with laboratory experimental data[Sun et al, 2018] for Test 10 and 49 along the periphery of the pipe. structure on the pore-water pressure around the buried pipeline are examined.…”

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confidence: 99%

“…5. Comparison of wave-induced pore pressure with laboratory experimental data[Sun et al, 2018] for Tests 10 and 49 through the centre of the pipe. Note: z/h=0 denotes the seabed surface in the experiments, where h is the seabed thickness.…”

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confidence: 99%

A Three-Dimensional Model for the Seabed Response Induced by Waves in Conjunction with Currents in the Vicinity of an Offshore Pipeline Using OpenFOAM

Liang

Jeng

2018

International Journal of Ocean and Coastal Engineering

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To better understand the physical processes involved in the wave–seabed–pipeline interactions (WSPI), a three-dimensional numerical model for the wave-induced soil response around an offshore pipeline is proposed in this paper. Seabed instability around an offshore pipeline is one of the key factors that need to be considered by coastal engineers in the design of offshore infrastructures. Most previous investigations into the problem of WSPI have only considered wave conditions and have not included currents, despite the co-existence of waves and currents in natural ocean environments. Unlike previous studies, currents are included in the present study for the numerical modeling of WSPI, using an integrated FVM model, in which the volume-averaged Reynolds-averaged Navier–Stokes (VARANS) equation is used to solve the mean fluid field, while Biot’s consolidation equation is used to describe the solid–pore fluid interaction in the porous medium. Numerical examples demonstrate a significant influence of ocean current direction and angle on the wave-induced pore pressures and the resultant seabed liquefaction around the pipeline, which cannot be observed in two-dimensional (2D) numerical simulation.

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Mechanical response of shield tunnel lining under nonlinear wave and current action in sloping seabed

Zhang,

Han,

et al. 2023

Num Anal Meth Geomechanics

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With the increasing demand for transportation construction in coastal areas, tunnel safety research is becoming increasingly important. Previous studies take less account of the nonlinear wave and current action under the sloping seabed terrain. Furthermore, there are few researches on the additional deformation of shield tunnel lining caused by wave‐current dynamic pressure. In this paper, according to the interaction theory of Stokes third‐order nonlinear wave and uniform current and Biot's dynamic consolidation equation, the excess pore pressure response of sloping pure seabed under the wave‐current action is obtained. The excess pore pressure reflected by the tunnel is acquired using the seepage continuity condition on the permeable lining surface. Considering the residual excess pore pressure caused by the cumulative effect under the cyclic action of seepage force. Then the distribution law of seepage pore pressure around the shield tunnel in the sloping seabed under the wave‐current action is obtained based on the superposition principle. The displacement response of tunnel lining during the long‐term service period is obtained by combining the exponential decay model. Moreover, the accuracy of theoretical analysis is verified by experimental monitoring data and numerical simulation, and the hydraulic parameters, seabed parameters and tunnel parameters are analyzed.

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Laboratory experimental study of ocean waves propagating over a partially buried pipeline in a trench layer

Cited by 47 publications

References 52 publications

The Role of 2D Seepage on Sediment Incipient Motion around a Pipeline

The Role of 2D Seepage on Sediment Incipient Motion around a Pipeline

A Three-Dimensional Model for the Seabed Response Induced by Waves in Conjunction with Currents in the Vicinity of an Offshore Pipeline Using OpenFOAM

Mechanical response of shield tunnel lining under nonlinear wave and current action in sloping seabed

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