Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Drainage effects on suction force beneath offshore perforated mudmats
For offshore perforated mudmats installed on low-permeability clay, the underneath suction force is an important component of the uplift resistance during removal and can be effectively reduced by perforation. Since the perforation may result in partial drainage of the soil, the effect of the uplift rate on the drainage condition and suction force is analysed in this study using the small strain finite element with the modified Cam Clay (MCC) model. Considering that water can stably accumulate beneath the mudmat, soft porous elastic water elements are used to simulate the interface and the compression is blocked by the proposed “equivalent thickness element”. The trend of increasing and then decreasing suction force with reducing normalized extraction rate V is studied, curve fitting is provided, and the mechanism is interpreted from both element-scale and macro-scale perspectives. The effects of soil strength heterogeneity, preload, and perforation width on suction force with drainage conditions are also discussed.
Drainage effects on suction force beneath offshore perforated mudmats
For offshore perforated mudmats installed on low-permeability clay, the underneath suction force is an important component of the uplift resistance during removal and can be effectively reduced by perforation. Since the perforation may result in partial drainage of the soil, the effect of the uplift rate on the drainage condition and suction force is analysed in this study using the small strain finite element with the modified Cam Clay (MCC) model. Considering that water can stably accumulate beneath the mudmat, soft porous elastic water elements are used to simulate the interface and the compression is blocked by the proposed “equivalent thickness element”. The trend of increasing and then decreasing suction force with reducing normalized extraction rate V is studied, curve fitting is provided, and the mechanism is interpreted from both element-scale and macro-scale perspectives. The effects of soil strength heterogeneity, preload, and perforation width on suction force with drainage conditions are also discussed.
Drainage effects on suction force beneath offshore perforated mudmats
Zhang, Yurong (Autor:in) / Fan, Shuntao (Autor:in) / Sa, Li (Autor:in) / Wang, Yilin (Autor:in)
Marine Georesources & Geotechnology ; 42 ; 1050-1062
02.08.2024
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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