Wave effects on the anti-liquefaction of the seabed around composite bucket foundation of offshore wind turbines

Wang, Lihua; Zhang, Jinfeng; Cai, Runbo; Li, Jingyuan

doi:10.1007/s42241-022-0107-3

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…One innovative foundation design that is currently being widely used in wind power development is the bucket foundation. There are three main types of bucket foundations used in offshore wind turbine engineering: mono-bucket foundation [3][4][5], composite bucket foundation [6,7], and multi-bucket foundations [8][9][10]. One of the main construction technologies used for composite and multi-bucket foundations is their air-floating characteristics.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Motion Characteristics of Air-Floating Tripod Bucket Foundation during Free Floating

Liu,

Ding,

et al. 2024

JMSE

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In recent years, multi-bucket foundations have been studied and gradually adopted in engineering practices as a novel foundation for offshore wind turbines within a range of water depth of 30 to 50 m. This study investigated the motion characteristics of air-floating tripod bucket foundation (AFTBF) through a series of experiments during free air-floating. The experimental results show that the surge force appears to be the most important factor influencing pitch moment and motion, whether it is a change in water depth or a draft for AFTBF. The maximum amplitudes of surge acceleration and pitch angle show a trend of increasing with narrower spacing and decreasing with wider spacing, while the heave acceleration shows an opposite trend. The added mass and damping of heave motion for AFTBF increase with shallower water due to the increasing pressure difference between the inside and bottom of bucket foundation. The shallower the water depth and the larger the draft, the longer the resonance period of heave.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Motion Characteristics of Air-Floating Tripod Bucket Foundation during Free Floating

Liu,

Ding,

et al. 2024

JMSE

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“…The shear strength of sub-bottom sediments will be reduced obviously after filling with dissolved CH 4 , and they are more susceptible to liquefaction under the influence of currents and waves (Sills and Wheeler, 1992;Song et al, 2021). Typically, sediment liquefaction likely occurs during extreme events such as typhoons, producing the collapse of marine constructions (Sumer et al, 2006;Wang et al, 2019;Wang et al, 2020). Meanwhile, sediment deficit due to dam constructions and other anthropogenic activities has caused severe erosion in the Yangtze subaqueous delta and the Hangzhou Bay (Xie et al, 2013;Guo et al, 2021), which has been accused to activate gas seepages because of thinning low permeability layer above gas-charged sediments (Chen et al, 2020).…”

mentioning

confidence: 99%

Controls on shallow gas distribution, migration, and associated geohazards in the Yangtze subaqueous delta and the Hangzhou Bay

Song

Fan²,

Su³

et al. 2023

Front. Mar. Sci.

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Shallow gas is generally extensively distributed in the Holocene muddy sediments and gas seepage has been increasingly reported to induce geohazards in coastal seas, but controls on gas distribution and migration remain elusive. This study explores gas distribution and migration in the Yangtze subaqueous delta and the Hangzhou Bay using high-resolution acoustic profiles and core data. Shallow gas is widely detected by the common presence of acoustic anomalous reflections including enhanced reflection, gas chimney, bright spot, acoustic blanking, and acoustic turbidity. The gas front depth is generally less than 17.5 m, and is meanly shallower in the Hangzhou Bay than in the Yangtze subaqueous delta because of relatively shallower water depth and coarser Holocene sediments in the Hangzhou Bay. Shallow gas is inferred to be a biogenic product, and its distribution is highly contingent on the Holocene stratal thickness and water depth. Active gas migration and seepages are evident, and recently increasing occurrences of gas seepage can be ascribed to global warming and seabed erosion due to sediment deficit. The findings warn us to pay more attention to the positive feedback loops of gas seepages with global warming and seabed erosion for the associated geohazard prediction and reduction, typically in the highly developed coastal regions.

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Recent advances of seabed liquefaction around the vicinity of marine structures

Lin,

Jeng,

Zhao

et al. 2023

Ocean Engineering

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Wave effects on the anti-liquefaction of the seabed around composite bucket foundation of offshore wind turbines

Cited by 5 publications

References 21 publications

Experimental Investigation on the Motion Characteristics of Air-Floating Tripod Bucket Foundation during Free Floating

Experimental Investigation on the Motion Characteristics of Air-Floating Tripod Bucket Foundation during Free Floating

Controls on shallow gas distribution, migration, and associated geohazards in the Yangtze subaqueous delta and the Hangzhou Bay

Recent advances of seabed liquefaction around the vicinity of marine structures

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