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Rozprawy doktorskie na temat „Suction caissons”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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1

Ulvestad, Anders. "Consolidation Settlement of Suction Caissons." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19504.

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Consolidation settlement analysis is an essential part of the design process for suction caissons. However it is a complex task since soil volume important for settlement analyses is directly affected by the installation process. Consolidation settlements have been found to be the critical design criterion in several subsea developments, adequate and correct analysis is therefore vital. The FEM code PLAXIS has been used to evaluate the reconsolidation process after completed installation of the suction caisson. Emphasize has been placed on studying the shear strength increase with time along t

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2

Pinna, Rodney. "Buckling of suction caissons during installation." University of Western Australia. School of Civil Engineering, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0008.

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Suction caissons are a foundation system for offshore structures which offer a number of advantages over traditional piled foundations. In particular, due to the method of installation used, they are well suited for deep-water applications. The suction caisson consists of an open ended cylindrical shell, which is installed below the seabed in a sequence which consists of two loading phases. The caisson is first installed part way under self weight, with the installation being completed by lowering the pressure within the cylinder and thus allowing the ambient water pressure to force the caisso

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3

Byrne, Byron Walter. "Investigations of suction caissons in dense sand." Thesis, University of Oxford, 2000. http://ora.ox.ac.uk/objects/uuid:64c30b2e-155c-4642-9115-5e2bf5667af5.

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Offshore structures are used in a variety of applications ranging from the traditional oil and gas extraction facilities to emerging renewable energy concepts. These structures must be secured to the seabed in an efficient and cost effective manner. A novel approach is to use shallow inverted buckets as foundations, installed by suction, in place of the more usual piles. These foundations lead to cost savings through reduction in materials and in time required for installation. It is necessary to determine how these foundations perform under typical offshore loading conditions so that design c

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4

Chen, Wen. "Uniaxial behaviour of suction caissons in soft deposits in deepwater." University of Western Australia. School of Civil and Resource Engineering, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0136.

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Suction caissons are a cost-effective alternative to traditional piles in deep to ultradeep waters. No design rule has been available on the axial capacity of suction caissons as part of the mooring system in soft sediments. In this research, a series of centrifuge tests were performed using instrumented model caissons, to investigate the axial capacity and radial stress changes around caissons during installation, consolidation and vertical pullout in normally consolidated, lightly overconsolidated and sensitive clays. Total pressure transducers instrumented on the caisson wall were calibrate

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5

Supachawarote, Chairat. "Inclined load capacity of suction caisson in clay." University of Western Australia. School of Civil and Resource Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0188.

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This thesis investigates the capacity and failure mode of suction caissons under inclined loading. Parametric finite element analyses have been carried out to investigate the effects of caisson geometry, loading angle, padeye depth (i.e. load attachment point), soil profile and caisson-soil interface condition. Displacement-controlled analyses were carried out to determine the ultimate limit state of the suction caissons under inclined load and the results presented as interaction diagrams in VH load space. VH failure interaction diagrams are presented for both cases where the caisson-soil int

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6

El-Gharbawy, Sherif Lotfy. "The pullout capacity of suction caisson foundations /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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7

Senders, Marc. "Suction caissons in sand as tripod foundations for offshore wind turbines." University of Western Australia. School of Civil and Resource Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0163.

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[Truncated abstract] The demand for offshore wind turbines is increasing in densely populated areas, such as Europe. These constructions are typically founded on a gravity foundation or a large 'mono pile'. Gravity foundations can only be used at locations where strong soils exist and water depths are limited. Costs associated with a 'mono pile' type foundation contribute to a very large percentage of the total investment costs. This research, therefore, focuses upon a different foundation for offshore wind turbines, namely suction caissons beneath a tripod. This foundation can be used in all

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8

Sgardeli, Christina G. (Georgia-Chrysouli C. ). "A finite element analysis of the pullout capacity of suction caissons in clay." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53111.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2009.<br>Includes bibliographical references (leaves 90-92).<br>Suction caissons are increasingly becoming the foundation of choice for offshore structures in deep water. They are used extensively in Tension Leg Platforms and provide the most efficient foundations for many offshore wind turbine structures. One of their major advantages is the ability to withstand large uplift forces by mobilizing shear on their external and internal surface and by the suction forces induced in the enclosed so

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9

Tran, Manh Ngoc. "Installation of Suction Caissons in Dense Sand and the Influence of Silt and Cemented Layers." University of Sydney, 2006. http://hdl.handle.net/2123/4064.

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Doctor of Philosophy<br>Suction caissons have been used in the offshore industry in the last two decades as both temporary mooring anchorages and permanent foundation systems. Although there have been more than 500 suction caissons installed in various locations around the world,understanding of this concept is still limited. This thesis investigates the installation aspect of suction caissons, focusing on the installation in dense sand and layered soils, where sand is inter-bedded by silt and weakly cemented layers. The research was mainly experimental, at both normal gravity and elevated acc

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10

Tran, Manh Ngoc. "Installation of Suction Caissons in Dense Sand and the Influence of Silt and Cemented Layers." Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/4064.

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Suction caissons have been used in the offshore industry in the last two decades as both temporary mooring anchorages and permanent foundation systems. Although there have been more than 500 suction caissons installed in various locations around the world,understanding of this concept is still limited. This thesis investigates the installation aspect of suction caissons, focusing on the installation in dense sand and layered soils, where sand is inter-bedded by silt and weakly cemented layers. The research was mainly experimental, at both normal gravity and elevated acceleration levels in a ge

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11

Stapelfeldt, Marc [Verfasser]. "The influence of the drainage regime on the installation and the response to vertical cyclic loading of suction caissons / Marc Stapelfeldt." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2021. http://d-nb.info/1226854575/34.

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12

Zhou, Hongjie. "Numerical study of geotechnical penetration problems for offshore applications." University of Western Australia. Centre for Offshore Foundation Systems, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0239.

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The research carried out in this thesis has concentrated on the application of numerical solutions to geotechnical penetration problems in offshore engineering. Several important issues closely relevant to deep-water oil and gas developments were investigated, covering installation of suction caisson foundations, interpretation of fullflow penetrometers and shallow penetration of a cylindrical object (submarine pipeline or T-bar), all in clayey sediments such as are often encountered in deep-water sites. These problems are commonly characterised by large vertical movements of structural elemen

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13

Cotter, Oliver. "Installation of suction caisson foundations for offshore renewable energy structures." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534163.

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14

Dekker, Marijn Johannes. "The Modelling of Suction Caisson Foundations for Multi-Footed Structures." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27161.

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Suction caissons are a type of offshore foundation that allow for fast and noise-free installation and decommissioning of offshore structures. They have been used for 20 years in the oil and gas industry and are also becoming more common in the offshore wind sector as a promising way to cost reduction. SPT is a leading contractor for the installation of both single anchor piles and foundations on multiple caissons. The suction caissons are installed by applying a differential pressure between the inner and outer sides of the caissons, which pushes the caissons into the soil. When a platform is

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15

Sharma, Partha Pratim. "Ultimate capacity of suction caisson in normally and lightly overconsolidated clays." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/2460.

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Petroleum exploration and production in recent years have moved into increasingly deeper water off the continental shelf. Some of these facilities are anchored in water depths in excess of 1000 meters. Exploration and production in deep water present new technological challenges where traditional fixed platforms have given way to floating structures. Today suction caissons are the most commonly used anchorage system for permanent offshore oil production facility. The objective of this study is to numerically predict the ultimate capacity of suction caissons in normally consolidated and lightly

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16

Cox, James A. "Long-term serviceability behaviour of suction caisson supported offshore wind turbines." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680352.

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Suction caissons have recently been considered as an alternative to monopile foundations for offshore wind turbines and met masts. By their nature, such structures have stringent limit states imposed on their design dictating the first modal frequency and the allowable structural rotations. The aim of this thesis is to assess how cyclic loading will affect the long-term serviceability behaviour of such an offshore structure. The behaviour of such a representative caisson system was assessed through the use of a series of scale model tests conducted in dry sand, replicating a fully drained prot

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17

Mucolli, Gent. "Fuzzy modeling of suction anchor behavior based on cyclic model tests data." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-theses/1313.

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This paper proposes a novel model that can predict the displacement of suction caisson anchors under monotonic and cyclic loading. Failure is assumed to occur when the accumulative monotonic and cyclic displacement along the load attachment point is over 60% of the diameter of the anchor. The anchors will go through lateral failure when the accumulative monotonic and cyclic displacement along the loading direction at the load attachment point is over 30% of the diameter. Hence, it is important to predict this displacement and therefore determine the expected failure of the anchor. However, it

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18

Cauble, Douglas Frederick. "An experimental investigation of the behavior of a model suction caisson in a cohesive soil." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10734.

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19

Unida, Roberto. "An investigation on the offshore wind energy potential in Italy and its deployment with floating turbines." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The thesis aim is to offer a general assessment of potential of offshore wind deployment in Italy. More specifically, it aids with the identification of the most promising locations and estimates the levelized cost of energy of the areas found suitable. Furthermore, the thesis develops a simple technical feasibility study at one of these sites, which specifically focuses on the design of the wind turbines foundations, considering and comparing different geotechnical solutions. It is been found that, in Italy, the offshore area suitable for the installation of wind farms is approximately 110,

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20

Floridia, Daniele. "Hybrid foundations for offshore wind turbines." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3284/.

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Nowadays offshore wind turbines represents a valid answer for energy production but with an increasing in costs mainly due to foundation technology required. Hybrid foundations composed by suction caissons over which is welded a tower supporting the nacelle and the blades allows a strong costs reduction. Here a monopod configuration is studied in a sandy soil in a 10 m water depth. Bearing capacity, sliding resistance and pull-out resistance are evaluated. In a second part the installation process occurring in four steps is analysed. considering also the effect of stress enhancement due to fr

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21

Chen, Ching-Hsiang active 2013. "Performance of suction caissons with a small aspect ratio." 2013. http://hdl.handle.net/2152/23092.

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Suction caissons with a smaller aspect (length to diameter) ratio are increasingly used for supporting offshore structures, such as wind turbines and oil and gas production facilities. The design of these stubbier foundations is usually governed by lateral loads from wind, waves, or currents. It is desired to have more physical understanding of the behavior of less slender suction caissons under cyclic lateral loading condition and to have robust design tools for analyzing these laterally loaded caissons. In this study, one-g model tests with 1:25 and 1:50 suction can foundation scale models

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22

El-Sherbiny, Rami Mahmoud Gilbert Robert B. Olson Roy E. "Performance of suction caisson anchors in normally consolidated clay." 2005. http://repositories.lib.utexas.edu/bitstream/handle/2152/1900/elsherbinyd11657.pdf.

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23

El-Sherbiny, Rami Mahmoud. "Performance of suction caisson anchors in normally consolidated clay." Thesis, 2005. http://hdl.handle.net/2152/1900.

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24

Beemer, Ryan. "Analytical and Experimental Studies of Drag Embedment Anchors and Suction Caissons." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9263.

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The need for experimental and analytical modeling in the field of deep water offshore anchoring technologies is high. Suction caisson and drag embedment anchors (DEA) are common anchors used for mooring structures in deep water. The installation process of drag embedment anchors has been highly empirical, employing a trial and error methodology. In the past decade analytical methods have been derived for modeling DEA installation trajectories. However, obtaining calibration data for these models has not been economical. The development of a small scale experimental apparatus, known as the Lapo

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25

Maniar, Dilip Rugnathbhai. "A computational procedure for simulation of suction caisson behavior under axial and inclined loads." Thesis, 2004. http://wwwlib.umi.com/cr/utexas/fullcit?p3143307.

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Maniar, Dilip Rugnathbhai Tassoulas John Lambros. "A computational procedure for simulation of suction caisson behavior under axial and inclined loads." 2004. http://wwwlib.umi.com/cr/utexas/fullcit?p3143307.

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27

Cao, Jianchun. "Centrifuge modeling and numerical analysis of the behaviour of suction caissons in clay /." 2003.

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28

Handayanu. "Failure mechanisms of suction caisson foundations in clay under vertical and inclined pullout loads /." 2001.

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29

Tran, Manh Ngoc. "Installation of suction caissons in dense sand and the influence of silt and cemented layers." Thesis, 2005. http://hdl.handle.net/2123/1197.

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30

Huang, Ting-Ting, and 黃亭亭. "Numerical study on installation pressure of suction caisson foundation for offshore wind turbine." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/vyt862.

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碩士<br>國立中山大學<br>海洋環境及工程學系研究所<br>107<br>The objective of this study is the mechanical behavior of suction bucket caisson under loadings. The formulations are derived based on the fundamental theories of ocean hydrodynamic and flow in porous medium and they are solved by the finite-difference methods. A benchmark validation was made before further simulation cases. Several penetration depths were assumed and two different suction pressures were given. Different boundary conditions were tested and the most reasonable one was suggested. Suction induced stresses in response to various suction press

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31

Hsuan-ChiHung and 洪萱淇. "Numerical Analysis of Installation and Load-Bearing Behavior of Suction Caisson Foundations for Offshore Wind Turbines." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/20539348839566337954.

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碩士<br>國立成功大學<br>土木工程學系<br>103<br>Suction caissons are considered as an alternative foundations for offshore wind turbines in Taiwan. This study presents numerical analyses of the installation process and bearing behavior of monopod suction caisson in sand with a finite difference technique. The results are validated with field test results in literature. It is shown that the application of suction inside the caisson is the main source for the penetration of foundations, and the soil stress distribution is symmetrical during the installation procedure. Under combined vertical, horizontal and mo

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32

Cheon, Jeong Yeon. "Analysis of spatial variability in geotechnical data for offshore foundations." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-12-2052.

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Deep foundations, such as piles and suction caissons, are used throughout an offshore oil and gas production facility in deepwater. Ideally, the values of geotechnical properties for foundation design are determined by results from geotechnical investigation programs performed at the site of the foundation. However, the locations for facilities are not known exactly when soil borings are drilled and the footprint of a facility in deepwater can be very large with numerous foundation elements spread out over miles. Therefore, it is not generally feasible to perform a site-specific investigation

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