Failure-Mechanism and Design Techniques of Offshore Wind Turbine Pile Foundation: Review and Research Directions

Basack, Sudip; Goswami, Ghritartha; Dai, Zihang; Baruah, Parinita

doi:10.3390/su141912666

Cited by 14 publications

(5 citation statements)

References 78 publications

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“…Basack et al studied the failure mechanism and design techniques of offshore wind turbine pile foundations. We refer to the damage mechanics of wind power support structures in this paper [9]. Lee et al investigated the characteristics of an oscillating water column wave power converter installed in an offshore jacket foundation for a wind turbine system [10].…”

Section: Introductionmentioning

confidence: 99%

The Construction Conditions of a Pre-Piling Template for Foundations of Offshore Structures

Won,

Seo,

Kwon

et al. 2024

JMSE

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The foundations of offshore wind power can be classified as floating, tripod, jacket, monopile, or gravity-based, depending on the support type. In the case of tripod- and jacket-type supports, the structures require precise construction. There are two main methods for installing substructures: post- and pre-piling. The post-piling method involves moving the completed substructure to the site and fixing it to the seabed by inserting a pile into the leg pile and driving it, allowing it to be constructed without special off-shore equipment; however, the construction period is long. Contrarily, the precision of foundation installation can be improved by installing a pre-piling template, which is special equipment that serves as a basic structure, on the seabed in advance, and subsequently inserting substructures. This study presents a new type of underwater pre-piling template and method for achieving optimal construction environment conditions. Construction precision was analyzed based on the wave condition, current speed, winch speed, wave direction, and current direction while the under-water template was anchored to the seabed. It was found that the wave conditions, winch speed, and vessel type had a significant influence. The results obtained considering the Douglas sea scale show that precise construction could only be achieved within Grade 2 for general barge ships, while jack-up barge ships could be used even at Grade 3 or higher. The higher the winch speed, the more stable construction becomes possible, and jack-up barges show greater constructability than general barges.

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Section: Introductionmentioning

confidence: 99%

The Construction Conditions of a Pre-Piling Template for Foundations of Offshore Structures

Won,

Seo,

Kwon

et al. 2024

JMSE

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“…However, to implement a suitable design methodology, it is imperative to obtain a comprehensive understanding of the failure mechanisms associated with these piles. Adding to this, the authors concentrate on the advancement in failure mechanism analysis and design practice of monopile foundations for offshore wind turbines through theoretical and experimental investigations carried out worldwide [22].…”

Section: Introductionmentioning

confidence: 99%

Environmental Sustainability and Efficiency of Offshore Platform Decommissioning: A Review

Zawawi,

Danyaro,

Liew

et al. 2023

Sustainability

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Malaysia has inherited many aged offshore platforms that have reached their decommissioning deadline. Many platforms need to be detached through subsea processes. Although there are good techniques for this, they are usually costly and necessitate a great deal of post-cut checking to ensure complete detachment. Explosive cutting techniques, on the other hand, are cost-effective and reliable for offshore decommissioning as they ensure complete cutting with little uncertainty. Until 2019, statistics showed that almost 35% of offshore platform decommissioning processes involved the use of explosive materials and other mechanical severance options. The method was reliable and cheap, but it had a large environmental impact. During blasting procedures utilizing pressure waves, many sea animal species are threatened, such as fishes, turtles, and dolphins. Depletion of already scarce fish stocks through the unsustainable use of explosive removal should be prevented by reducing the environmental impact of underwater explosives. Moreover, due to safety hazards, vessel and aircraft movement around the explosion zone is prohibited. Therefore, this paper provides a comprehensive review of using a highly vacuum-sealed pile for the explosion to control and reduce shock wave propagation. This effort appreciates the benefits of the explosive cutting technique and reduces its environmental side effects. Our findings indicate an accurate and clean-cut method serving the efficiency of offshore platform decommissioning as well as environmental sustainability. Finally, recommendations for future perspectives have been provided based on the decommissioning of offshore platforms, such as topside removal, planning, time scale, and optimization of available space.

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“…Pile foundation is the main foundation form of offshore platform and offshore wind power [1][2][3][4]. The ultimate bearing capacity is an important content in the design of pile foundation, and there are two main methods to calculate the bearing capacity of pile foundation in the current relevant specifications for marine engineering; one is based on the undrained shear strength of soil [5], and the other is based on the results of an in situ cone penetration test (CPT/CPTU).…”

Section: Introductionmentioning

confidence: 99%

The Influence Depth of Pile Base Resistance in Sand-Layered Clay

Fu¹,

Li²,

Zhang³

et al. 2023

Sustainability

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Pile base resistance is an important part of the ultimate bearing capacity, and the soil within a certain range above and below the pile end contributes to the pile base resistance. In general, pile base resistance is calculated according to the average value of soil strength within a certain range of the pile end in the current calculating method, so it is very important to determine the influence range of pile base resistance. Based on the soil parameters and the results of the cone penetration test of the LiuHua 11-1 site in the South China Sea, the difference of pile base resistance calculated by different methods, the regularity of pile base resistance affected by calculation depth range is revealed. Additionally, the numerical simulation method is used to analyze the distribution of a plastic zone around the pile end in homogeneous soil and stratified soil, the results show the influence depth range of pile base resistance is 0.12 D above the pile end to 0.83 D below the pile end in clay, and the influence depth range is 0.9 D above the pile end to 1.3 D below the pile end in stratified soil.

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Failure-Mechanism and Design Techniques of Offshore Wind Turbine Pile Foundation: Review and Research Directions

Cited by 14 publications

References 78 publications

The Construction Conditions of a Pre-Piling Template for Foundations of Offshore Structures

The Construction Conditions of a Pre-Piling Template for Foundations of Offshore Structures

Environmental Sustainability and Efficiency of Offshore Platform Decommissioning: A Review

The Influence Depth of Pile Base Resistance in Sand-Layered Clay

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