Effects of dynamic soil permeability on the wave-induced seabed response around a buried pipeline. (15th August 2019)

• Record Type: Journal Article
• Authors: Wu, S.; Jeng, D.-S.
• Is Part Of: Ocean engineering. Volume 186(2019)
• Publication Date: 2019-08-15
• Subjects: Dynamic permeability -- Degree of saturation -- Pore-water pressures -- Soil response -- Wave loading; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2019.106132
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Soil permeability is one of key factors in the prediction of the wave-induced seabed response, which needs to be considered in the design of foundation around marine installations. Most previous studies in the field treated the soil permeability as a constant or varying in spacial domain, although it depends on numerous soil parameters. In this study, the soil permeability is considered as a function of pore-water pressures as reported in the literature. With this new feature, the governing equations will become non-linear differential equations. Numerical examples demonstrate the considerable influence of dynamic soil permeability on the wave-induced pore pressure and effective stresses. It is concluded that the conventional model with constant soil permeability under-estimates the liquefaction potential. Highlights: New conceptual model for wave–seabed–pipe interactions around a submarine pipeline with dynamic soil permeability. Effects of dynamic soil permeability on the wave-induced pore pressures and effective normal stresses are insignificant. The conventional model with a constant permeability underestimates the wave-induced liquefaction potential around a submarine pipeline.