Installation of Suction Caissons in Sand with Silt Layers

Tran, Manh N.; Randolph, Mark; Airey, David

doi:10.1061/(asce)1090-0241(2007)133:10(1183)

Cited by 68 publications

(38 citation statements)

References 5 publications

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“…The thickness to diameter ratio is equal to 1·2%, but ranges between 0·3 and 0·6% for actual geometries (Byrne & Houlsby, 2002;Kelly et al, 2006b;Tran, 2005). It is greater than for actual caissons for numerical purposes.…”

Section: Numerical Model Geometrymentioning

confidence: 97%

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Numerical modelling of transient cyclic vertical loading of suction caissons in sand

2016

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This paper presents numerical investigations of the monotonic and cyclic behaviours of suction caissons upon vertical transient loading. Both drained and partially drained conditions are investigated. Monotonic compression and traction simulations are carried out to qualitatively compare results with the literature and validate the model. They highlight the different modes of reaction of the caisson to both compression and traction loading. A sensitivity analysis points out the strong influence of some parameters on the resistance of the caisson but also on the failure mechanism. The transient behaviour of the caisson upon different kinds of cyclic load signals is analysed. Results reproduce the settlement and pore water pressure accumulations observed during experiments. The influence of the key design parameters on the settlement accumulation is also assessed. Finally a cyclic diagram is proposed to describe the evolution of the final settlement upon different magnitudes of loading.

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Section: Numerical Model Geometrymentioning

confidence: 97%

“…They consist of a hollow cylinder open towards the bottom. Their top (the lid) can be a stiffer plate or a dome (Tran, 2005). The idea of a suction anchor is not new and arose in the 1960s (Goodman et al, 1961) to replace inefficient weight anchors.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of transient cyclic vertical loading of suction caissons in sand

2016

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“…Verticality was maintained with the use of an inclinometer. Installing the foundation under single-g conditions causes the sand displaced during installation to dilate and heave more in comparison to a prototype case (Tran, 2005). As only the transient behaviour was of interest, the installation was not modelled.…”

Section: Testing Programmentioning

confidence: 99%

Serviceability of suction caisson founded offshore structures

Cox

Bhattacharya

2017

Proceedings of the Institution of Civil Engineers - Geotechnica

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Suction caissons have recently been considered as a cost effective alternative to conventional foundations for offshore met-masts and wind turbines. Such foundation arrangements are suitable for applications within water depths of 20-30m. Most offshore structures have stringent serviceability limit states imposed on their design dictating the allowable structural deflections and accumulated rotations throughout its operational life. This paper summarises the findings from a series of scale model tests and identifies key factors which influence the serviceability performance of a caisson founded offshore structure. These tests were conducted using representative caisson models in loose sand under single-g conditions, replicating a fully drained prototype condition. These experiments recorded the rotational foundation stiffness (soil structure interaction), the evolution of foundation stiffness under cyclic loading and the accumulation of structural rotation with loading cycles. It was discovered that the foundation stiffness was dependent on the local soil strain, and under cyclic loading would increase in a logarithmic manner. In addition it was found that under cyclic loading, a caisson system will retain and accumulate structural rotation following with a power relationship. From these observations it was possible to produce an analytical model and describe the changing serviceability state of a prototype structure with loading cycles.

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“…The sand grading is selected close to that considered in small-scale experiments on suction caissons carried out by other researchers (Villalobos 2003;Tran 2005). The particle size distribution curve for the silty sand is shown in Figure 4.…”

Section: Sand Bed Characteristics/preparationmentioning

confidence: 99%

Model testing of upright and tapered suction caissons in sand

Zeinoddini

Kakasoltani

Abdi

et al. 2014

Ships and Offshore Structures

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Behaviour of upright suction caissons with regard to their applications, installation, load-bearing, etc., has already been investigated by a number of researchers. Some researchers have also addressed the behaviour of tapered piles under different loading conditions. However, there has not been any previous experimental experience regarding the performance of tapered suction caissons. This paper reports the results of a primarily experimental investigation intended as a first step to understanding the performance of tapered suction caissons. The 1g experiments have been carried out on small-scale caisson models having upright and sloping walls. The caissons have been installed in a very fine saturated silty sand, and the effects of geometrical parameters, wall slope and the soil density on the overall penetration force required for installation and the pull-out capacity of the cassion have been studied. Influence of pull-out rate on the ultimate capacities has also been investigated.

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Installation of Suction Caissons in Sand with Silt Layers

Cited by 68 publications

References 5 publications

Numerical modelling of transient cyclic vertical loading of suction caissons in sand

Numerical modelling of transient cyclic vertical loading of suction caissons in sand

Serviceability of suction caisson founded offshore structures

Model testing of upright and tapered suction caissons in sand

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