SEEPAGE INDUCED EROSION PROCESS OF SUCTION BUCKET FOUNDATIONS INSTALLATION UNDER NEGATIVE PRESSURE

Shen Kanmin; Wang Kuanjun; Shan Zhigang; Yu Jian; Wang Bin

doi:10.19912/j.0254-0096.tynxb.2020-0774

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 380-386. DOI: 10.19912/j.0254-0096.tynxb.2020-0774

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

SEEPAGE INDUCED EROSION PROCESS OF SUCTION BUCKET FOUNDATIONS INSTALLATION UNDER NEGATIVE PRESSURE

Shen Kanmin^1,2, Wang Kuanjun¹, Shan Zhigang¹, Yu Jian², Wang Bin¹

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Abstract

In order to investigate the seepage erosion effect of suction bucket foundation installation under negative pressure, the numerical model of a suction bucket embedded in sand is built in axisymmetric coordinate. A multi-phase model with soil skeleton,fluidized fine particles and water is used to describe the soil. The seepage field during suction installation is firstly calculated, and then the development process of seepage erosion caused by suction installation under negative pressure is simulated. The seepage erosion leads to different permeability values in different zones of the seabed soil, and redistributes the hydraulic gradient from internal side to external side. The “safety mechanism” during suction installation is then revealed and variation of the critical suction is evaluated to provide an advice for suction installation of buckets..

Key words

offshore wind power / underwater foundations / seepage / erosion / permeability / suction bucket

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Shen Kanmin, Wang Kuanjun, Shan Zhigang, Yu Jian, Wang Bin. SEEPAGE INDUCED EROSION PROCESS OF SUCTION BUCKET FOUNDATIONS INSTALLATION UNDER NEGATIVE PRESSURE[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 380-386 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0774

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