Laboratory study for pore pressures in sandy deposit under wave loading

Liu, B.; Jeng, Dong‐Sheng; Ye, G.L.; Yang, Bing

doi:10.1016/j.oceaneng.2015.06.029

Cited by 84 publications

(72 citation statements)

References 32 publications

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“…This analytical solution has been widely used for the validation of the waveinduced oscillatory pore pressure in a porous seabed without a structure in the literature [4]. Recently, Liu and Jeng [27] con ducted a series of ID laboratory experiments (similar to Ref. [7]) for the wave-induced oscillatory pore pressure in marine sedi ments.…”

Section: Validations Of the Present Modelmentioning

confidence: 96%

Two-Dimensional Model for Pore Pressure Accumulations in the Vicinity of a Buried Pipeline

Zhao

Jeng

Guo

et al. 2014

Journal of Offshore Mechanics and Arctic Engineering

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In this paper, we presented an integrated numerical model fo r the wave-induced residual liquefaction around a buried offshore pipeline. In the present model, unlike previous investigations, two new features were added in the present model: (i) new definition o f the source term fo r the residual pore pressure generations was proposed and extended from ID to 2D; (ii) preconsolidation due to self-weight o f the pipeline was considered. The present model was validated by comparing with the previous experimental data fo r the cases without a pipeline and with a buried pipeline. Based on the numerical model, first, we examined the effects o f seabed, wave and pipeline characteristics on the pore pressure accumulations and residual liquefaction. The numerical results indicated a pipe with a deeper buried depth within the seabed with larger consolidation coefficient and relative density can reduce the risk o f liquefaction around a pipeline. Second, we investi gated the effects o f a trench layer on the wave-induced seabed response. It is found that the geometry o f the trench layer (thickness and width), as well as the backfill materials (permeability K and relative density Dr) have significant effect on the development o f liquefaction zone around the buried pipeline. Furthermore, under certain conditions, par tially backfill the trench layer up to one pipeline diameter is sufficient to protect the pipe lines from the wave-induced liquefaction.

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Section: Validations Of the Present Modelmentioning

confidence: 96%

Two-Dimensional Model for Pore Pressure Accumulations in the Vicinity of a Buried Pipeline

Zhao

Jeng

Guo

et al. 2014

Journal of Offshore Mechanics and Arctic Engineering

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“…3. The comparison of vertical distribution of maximum wave-induced oscillatory pore pressure versus relative soil depth with the 1-D experimental results (symbols, [46]) and the analytical solution (dashed lines, [6]). t) into the mass conservation equation [42] is used in the present study.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…The numerical results of the maximum vertical oscillatory pore pressure (|p|/p 0 , p 0 is the amplitude of dynamic wave pressures at the seabed surface) versus relative soil depth (z/h) are compared with analytical solutions [6] and laboratory experiments [46]. Based on the poro-elastic theory developed by Biot [10], Hsu and Jeng [6] developed an analytical solution for an unsaturated, anisotropic soil of finite thickness.…”

Section: Verificationsmentioning

confidence: 99%

“…The case of a saturated, isotropic soil subject to a progressive wave loading is used for the validation of the wave-induced oscillatory pore pressure in a porous seabed without a structure in this study. Recently, Liu and Jeng [46] conducted a series of 1-D laboratory experiments to investigate the vertical profile of pore pressure distributions in marine sediments. The one-dimensional facility in their experiments was set-up with a vertical cylinder, a 1.8 m soil layer and 0.2 m water above the deposit which is an improvement on the basis of the one originally designed by Zen and Yamazaki [2].…”

Section: Verificationsmentioning

confidence: 99%

“…This allows the facility to simulate the case with large waves which is close to the natural ocean environments. More details of the experiments are available in [46]. As shown in Fig.…”

Section: Verificationsmentioning

confidence: 99%

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Numerical study of wave-induced soil response in a sloping seabed in the vicinity of a breakwater

Zhao

Jeng

2015

Applied Ocean Research

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a b s t r a c tIn this study, a mathematical integrated model is developed to investigate the wave-induced sloping seabed response in the vicinity of breakwater. In the present model, the wave model is based on the Volume-Averaged/Reynolds Averaged Navier-Stokes (VARANS) equations, while Biot's consolidation equation is used to govern the soil model. The influence of turbulence fluctuations on the mean flow with respect to the complicated interaction between wave, sloping seabed and breakwater are obtained by solving the Volume-Averaged k − model. Unlike previous investigations, the phase-resolved absolute shear stress is used as the source of accumulation of residual pore pressure, which can link the oscillatory and residual mechanisms simultaneously. Based on the proposed model, parametric studies regarding the effects of wave and soil characteristics as well as bed slopes on the wave-induced soil response in the vicinity of breakwater are investigated. Numerical results indicate that wave-induced seabed instability is more likely to occur in a steep slope in the case of soil with low relative density and low permeability under large wave loadings. It is also found that, the permeability of breakwater significantly affect the potential for liquefaction, especially in the region below the breakwater.

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Experimental Study on Wave-Induced Pore Pressure Response and Instability of Layered Submarine Clayey Slope

Bi,

Huang,

Guo

et al. 2024

Environmental Science and Engineering

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Laboratory study for pore pressures in sandy deposit under wave loading

Cited by 84 publications

References 32 publications

Two-Dimensional Model for Pore Pressure Accumulations in the Vicinity of a Buried Pipeline

Two-Dimensional Model for Pore Pressure Accumulations in the Vicinity of a Buried Pipeline

Numerical study of wave-induced soil response in a sloping seabed in the vicinity of a breakwater

Experimental Study on Wave-Induced Pore Pressure Response and Instability of Layered Submarine Clayey Slope

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