Experimental studies on the drag reduction effect of bucket foundation installation under suction pressure in sand. (4th July 2019)

• Record Type: Journal Article
• Authors: Liu, Run; Ma, Wen-guan; Qi, Yue; Wu, Xin-li
• Is Part Of: Ships and offshore structures. Volume 14:Number 5(2019)
• Page Start: 421
• Page End: 431
• Publication Date: 2019-07-04
• Subjects: Offshore wind turbines -- bucket foundations -- penetration resistance -- drag reduction coefficients; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2018.1500188
• Languages: English
• ISSNs: 1744-5302

Abstract

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.