Abstract
The suction caisson foundation is a hollow cylinder with a closed top lid and is penetrated into seabed by applying suction inside the caisson. The suction pressure leads to a downward push force and induces a seepage flow to reduce the effective stress in the soil plug. This reduces the soil resistance and makes it possible to install the foundation even in dense sand. The critical suction is limited by the piping failure in the soil plug. “Safety mechanism” is found in the practical installation which allows the applied underpressure over the critical suction. This can be explained by the pre-loosening effect on the soil by the upward seepage flow. The loosening will increase the permeability of the inner soil plug and redistribute the hydraulic gradient from internal side to external side.
The numerical model of a suction caisson foundation 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 of permeability in different zones of the seabed soil is estimated. The redistribution of pore pressure reveals the “safety mechanism” and variation of the critical suction is evaluated to give an advice for suction installation of caissons.
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Vardoulakis, I., Stavropoulou, M., Papanastasiou, P.: Hydro-mechanical aspects of the sand production problem. Transp. Porous Media 22(2), 225–244 (1996)
Tjelta, T.I.: Geotechnical experience from the installation of the Europipe jacket with bucket foundations. In: Offshore Technology Conference, Houston (1995)
Erbrich, C.T., Tjelta, T.I.: Installation of bucket foundations and suction caissons in sand-geotechnical performance. In: Offshore Technology Conference, Houston (1999)
Tjelta, T.I.: The suction foundation technology. In: Frontiers in Offshore Geotechnics III, vol. 85, Oslo (2015)
Andersen, K.H., Jostad, H.P., Dyvik, R.: Penetration resistance of offshore skirted foundations and anchors in dense sand. J. Geotech. Geoenviron. Eng. 134(1), 106–116 (2008)
Sterpi, D.: Effects of the erosion and transport of fine particles due to seepage flow. Int. J. Geomech. 3(1), 111–122 (2003)
Cividini, A., Gioda, G.: Finite-element approach to the erosion and transport of fine particles in granular soils. Int. J. Geomech. 4(3), 191–198 (2004)
Luo, Y.L.: A continuum fluid-particle coupled piping model based on solute transport. Int. J. Civ. Eng. 11(1B), 38–44 (2013)
Guo, Z., Wang, L., Yuan, F., Li, L.: Model tests on installation techniques of suction caissons in a soft clay seabed. Appl. Ocean Res. 34, 116–125 (2012)
Wang, L., Yu, L., Guo, Z., Wang, Z.: Seepage induced soil failure and its mitigation during suction caisson installation in silt. J. Offshore Mech. Arct. Eng. 136(1), 011103 (2014)
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Shen, K., Guo, Z., Wang, L., Rui, S., He, B. (2019). Investigation on Seepage Erosion and Safety Mechanism of Suction Caisson Installation. In: Randolph, M., Doan, D., Tang, A., Bui, M., Dinh, V. (eds) Proceedings of the 1st Vietnam Symposium on Advances in Offshore Engineering. VSOE 2018. Lecture Notes in Civil Engineering , vol 18. Springer, Singapore. https://doi.org/10.1007/978-981-13-2306-5_26
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DOI: https://doi.org/10.1007/978-981-13-2306-5_26
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