Experimental studies on the drag reduction effect of bucket foundation installation under suction pressure in sand

Run Liu, Wen guan Ma, Yue Qi, Xinli Wu

Research output: Contribution to journalArticle

Abstract

Bucket foundations can be regarded as a comparatively new foundation system for offshore structures. The installation of a bucket foundation using suction pressure can lead to seepage from the outside to the inside of the bucket, change the laws governing extrusion and decrease the friction coefficient between the wall and the sand. In this paper, three different bucket foundation wall thicknesses are examined when static and suction pressures are used to drive the foundation into the sand. The relationship between the pressure of the earth and the friction resistance of the inner and outer walls as a function of the penetration depth and the tip resistance was researched in the experiments. The mechanism behind the decrease in the penetration resistance and its magnitude based on the experimental results was revealed. Laws influencing the wall thickness to penetration resistance ratio for different penetration depth to diameter (h/D) ratios are proposed.

Original languageEnglish (US)
Pages (from-to)421-431
Number of pages11
JournalShips and Offshore Structures
Volume14
Issue number5
DOIs
StatePublished - Jul 4 2019

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Drag reduction
Sand
Friction
Offshore structures
Seepage
Extrusion
Earth (planet)
Experiments

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Mechanical Engineering

Cite this

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title = "Experimental studies on the drag reduction effect of bucket foundation installation under suction pressure in sand",
abstract = "Bucket foundations can be regarded as a comparatively new foundation system for offshore structures. The installation of a bucket foundation using suction pressure can lead to seepage from the outside to the inside of the bucket, change the laws governing extrusion and decrease the friction coefficient between the wall and the sand. In this paper, three different bucket foundation wall thicknesses are examined when static and suction pressures are used to drive the foundation into the sand. The relationship between the pressure of the earth and the friction resistance of the inner and outer walls as a function of the penetration depth and the tip resistance was researched in the experiments. The mechanism behind the decrease in the penetration resistance and its magnitude based on the experimental results was revealed. Laws influencing the wall thickness to penetration resistance ratio for different penetration depth to diameter (h/D) ratios are proposed.",
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Experimental studies on the drag reduction effect of bucket foundation installation under suction pressure in sand. / Liu, Run; Ma, Wen guan; Qi, Yue; Wu, Xinli.

In: Ships and Offshore Structures, Vol. 14, No. 5, 04.07.2019, p. 421-431.

Research output: Contribution to journalArticle

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