Capacity of skirted foundations in sand-over-clay under combined V-H-M loading

Zou, Xiang; Hu, Yuxia; Hossain, Muhammad Shazzad; Zhou, Mi

doi:10.1016/j.oceaneng.2018.04.007

Cited by 47 publications

(8 citation statements)

References 45 publications

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“…The sand was modelled as an elastic-perfect plastic material in accordance with the Mohr-Coulomb yield criterion. The unit weight of soil is considered as γ = 19.5 KN/m3 [4] and the under watered elastic properties having a 50 MPa young's modulus and the poisons ratio Ʋ of 0.3 [9]. The undrained plastic properties like cohesion c, internal friction angle Ø and dilation angle Ψ are attributed to the sand.…”

Section: Finite Element Modelsmentioning

confidence: 99%

“…The analysis of vertical load carrying capacity of skirt foundations are being tested over a period of time [5], [6]. The capacity of piles in various soil densities is assessed using both experimental [7] and numerical modelling [8] with varying in aspect ratios (L/D) [9] and the failure envelops were also considered for all spacing impacts [10]. Coming to field tests outcomes with skirt bucket type foundation in sand with vertical loading are shown in [4], [11].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Modelling and Analysis of Factors Influencing Bearing Capacity of Skirt Foundation

Goutham¹,

Chezhiyan²

2019

IJITEE

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Skirt foundations have been discovered to be one of the alternatives to stacking offshore structures such as wind turbines, petroleum platforms etc. Offshore wind turbines are primarily exposed to vertical and lateral loads due to wind and present conditions. Many scientists have already carried out multiple vertical loading experiments on a circular footing and have found that this category of foundation increases bearing ability, decreases settlement and changes the behavior of load settlement. In this study, a 3D finite element analysis is carried out to evaluate how the skirt foundations are influenced by the vertical loads. The soil medium and skirt foundation were designed for analyses with varying in their aspect ratios (change in dimensions of depth, d and diameter, D) of skirt foundation and area ratio of skirt foundation. The effect of compactness of soil medium is also calculated by using various types of soil parameters. Furthermore, the current results express how the load carrying capacity of skirt foundation is varied by changing in the aspect ratios and area ratios of the skirt foundation. Also conclusions were drawn that compactness of soil medium plays a vital role in carrying vertical load.

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Section: Finite Element Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Modelling and Analysis of Factors Influencing Bearing Capacity of Skirt Foundation

Goutham¹,

Chezhiyan²

2019

IJITEE

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“…Sand-overlying-clay soil deposit is a complex, but commonly encountered, soil profile in petroleum regions and offshore wind farms, for example, in the Yellow Sea of Korea, North Sea, Gulf of Mexico, South China Sea, offshore India and Thailand [18,19].…”

Section: Introduction 1conceptmentioning

confidence: 99%

“…Existing understandings only cover the failure mechanisms of conventional types of foundations in such sand-overlying-clay soil profiles [18][19][20][21][22]. For example, Zheng et al (2018) [23] found a 'punch-through' failure pattern for strip footings in the sand-over-clay layered deposits, where the upper sand block is pushed into the underlying clay due to the vertical compression under V-H-M combined loadings.…”

Section: Introduction 1conceptmentioning

confidence: 99%

Bearing Capacity of Single Pile-Friction Wheel Composite Foundation on Sand-over-Clay Deposit under V-H-M Combined Loadings

Wang

Zou

2021

Applied Sciences

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This paper presents numerical modelling to investigate the bearing capacities and failure mechanisms of single pile-friction wheel composite foundation in sand-overlying-clay soil conditions under combined V-H-M (vertical-horizontal-moment) loadings. A series of detailed numerical models, with validations of centrifuge testing results, are generated to explore the potential factors influencing the bearing capacity of this composite system. Intensive parametric study is then performed to quantify the influences of the foundation geometry, soil properties, sand layer thickness, pre-vertical loading and lateral loading height on the failure envelopes in the V-H-M domain. Last but not least, an empirical design procedure is proposed based on a parametric study to predict the bearing capacity of this composite foundation under various loading conditions, which can provide guidance for its design and application.

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“…It is therefore important to distinguish between the behavior of embedded and skirted foundations. While investigation of bearing capacity of shallow foundations has typically considered fully solid concepts (e.g., Salgado et al, 2004 andGourvenec, 2008), the bearing behavior, failure mechanisms, and stiffness of skirted foundation have received considerable attention recently (Yun and Bransby, 2007;Mana et al, 2012;Liu et al, 2017;Wang et al, 2017;Jalbi et al, 2018;and Zou et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Numerical studies on soil-skirt roughness and sand plug impact in bearing capacity prediction of caisson foundations subjected to the uniaxial loads

Ghaseminejad

Barari

Rowshanzamir

2018

Journal of Renewable and Sustainable Energy

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Skirted foundations denoted as suction caissons are becoming an increasingly prevalent offshore foundation solution for either the oil and gas industry or renewable energy infrastructure. Their response to combined vertical, horizontal, and moment loading must be found to ensure their stability under harsh environmental conditions. As part of this process, knowledge of uniaxial capacities is required. Previous studies have neglected the effect of deformable ground by assuming that the soil within skirts behaves rigid during drained loading, but this assumption needs rigorous studies. A series of 3-D finite element analyses has been conducted to investigate directly how the skirt geometry, soil–skirt interface roughness, and deformable plug within the skirt compartment affect the drained skirted foundation capacity and depth factors under uniaxial loading. The results show that the foundation embedment, interface friction, and soil plug placed within the skirt significantly influence the accompanying mechanisms occurring at failure and therefore the uniaxial capacities. The finite element analyses under uniaxial loads are performed for the rough and smooth interface assumptions, to show how the roughness interface influences the ultimate bearing capacities and depth factors and the corresponding failure mechanisms in different soil profiles.

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Capacity of skirted foundations in sand-over-clay under combined V-H-M loading

Cited by 47 publications

References 45 publications

Numerical Modelling and Analysis of Factors Influencing Bearing Capacity of Skirt Foundation

Numerical Modelling and Analysis of Factors Influencing Bearing Capacity of Skirt Foundation

Bearing Capacity of Single Pile-Friction Wheel Composite Foundation on Sand-over-Clay Deposit under V-H-M Combined Loadings

Numerical studies on soil-skirt roughness and sand plug impact in bearing capacity prediction of caisson foundations subjected to the uniaxial loads

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