Ocean Systems Engineering

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Effect of water jetting parameters on the penetration behavior of jack-up spudcan in surficial sand condition

  • Han, Dong-Seop (Research Institute of Green Energy Equipment, Dong-A University) ;
  • Kim, Seung-Jun (Coastal and Ocean Eng. Division, Zachry Dept. of Civil Eng., Texas A&M University, College Station) ;
  • Kim, Moo-Hyun (Coastal and Ocean Eng. Division, Zachry Dept. of Civil Eng., Texas A&M University, College Station)
  • Received : 2014.12.20
  • Accepted : 2015.02.20
  • Published : 2015.03.25
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Abstract

The water jetting system for a jack-up spudcan requires the suitable design considering the platform/spudcan particulars, environments, and soil conditions, either the surficial clay or surficial sand. The usage of water jetting depends critically on soil conditions. The water jetting is usually used for the smooth and fast extraction of the spudcan in the surficial clay condition. It is also required for inserting spudcan up to the required depth in the surficial sand condition, which is investigated in this paper. Especially, it should be very careful to use the water jetting during an installation of spudcan in the surficial sand condition, because there is a risk of overturning accident related to the punch-through. Therefore, in this study, the effect of water jetting flow rate and time on the change of soil properties and penetration resistance is analyzed to better understand their interactions and correlations when inserting the spudcan with water jetting in surficial sand condition. For the investigation, a wind turbine installation jack-up rig (WTIJ) is selected as the target platform and the multi layered soil (surficial sand overlaying clays) is considered as the soil condition. The environmental loading and soil-structure interaction (SSI) analysis are performed by using CHARM3D and ANSYS. This kind of investigation and simulation is needed to decide the proper water jetting flow rate and time of spudcan for the given design condition.

Keywords

Acknowledgement

Supported by : Korea Ministry of Science, ICT and Future Planning

References

  1. American Petroleum Institute (2007), API BULLETIN 2INT-MET Interim guidance on hurricane conditions in the Gulf of Mexico, Washington, D.C., U.S.A.
  2. ANSYS, Inc., 2012. ANSYS Mechanical APDL Material Reference, 47-57.
  3. Det Norske Veritas AS (2012), Self-elevating Units.
  4. Duan, M., Zhao, J., Wang, J. and Song, L. (2013), "Jetting effect of jackup on actively punching through overlaid sand layer", Int. J. Offshore Polar., 23(1), 55-62.
  5. Kai, S.U. and Yin, L.I. (2009), "Discussion of extended Drucker-Prager yield criterion in slope stability analysis", Proceeding of the Power and Energy Engineering Conference, 2009 APPEEC.
  6. Kang, H.Y. and Kim, M.H. (2012), "Hydrodynamic interactions and coupled dynamics between a container ship and multiple mobile harbors", Ocean Syst. Eng., 2(3), 217-228. https://doi.org/10.12989/ose.2012.2.3.217
  7. Kim, M.H. and Chen, W. (1994), "Slender body approximation for slowly-varying wave loads in multi-directional waves", J. Appl. Ocean Res., 16(3), 141-163. https://doi.org/10.1016/0141-1187(94)90025-6
  8. Kim, M.H. and Ran, Z. (1994), "Responses of an articulated tower in waves and currents", Int. J. Offshore Polar, 4(4), 298-391.
  9. Kellezi, L. and Stromann, H. (2003), "FEM analysis of jack-up spudcan penetration for multi-layered critical soil conditions", Proceeding of the BGA International Conference on Foundations.
  10. Han, D.S., Kim, S.J. and Kim, M.H. (2014), "Effect of plate slope and water jetting on the penetration depth of a jack-up spud-can for surficial sand", Ocean Syst. Eng., 4(4), 263-278. https://doi.org/10.12989/ose.2014.4.4.263
  11. Han, D.S., Kim, S.J., Kim, M.H. and Park, Y.C. (2014), "Relation between slope of plate and reaction of soil in a spudcan for jack-up platform", Proceeding of the International Offshore and Polar Engineering Conference, 2014 ISOPE.
  12. Qiu, G. and Grabe, J. (2012), "Numerical investigation of bearing capacity due to spudcan penetration in sand overlying clay", Can. Geotech. J., 49, 1393-1407. https://doi.org/10.1139/t2012-085
  13. Tho, K.K., Leung, C.F., Chow, Y.K. and Swaddiwudhipong, S. (2012), "Eulerian finite-element technique for analysis of jack-up spudcan penetration", Int. J. Geomech. -ASCE, 12(1), 64-73. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000111
  14. Yang, C.K. and Kim, M.H. (2011), "The structural safety assessment of a tie-down system on a tension leg platform during hurricane events", Ocean Syst. Eng., 1(4), 263-283. https://doi.org/10.12989/ose.2011.1.4.263
  15. Yu, L., Hu, Y., Liu, J., Randolph F.M. and Kong, X. (2012), "Numerical study of spudcan penetration in loose sand overlying clay", J. Comput. Geotech., 46, 1-12. https://doi.org/10.1016/j.compgeo.2012.05.012
  16. Zhao, J., Duan, M., Cao, S., Hu, Z. and Song, L. (2011), "Prediction of spudcan penetration depth in multiple layers with sand overlying clay", J. Appl. Mech. Mater., 52-54, 995-1002. https://doi.org/10.4028/www.scientific.net/AMM.52-54.995

Cited by

  1. Effect of water jetting on soil properties and spud-can penetration/extraction in various soil conditions: numerical simulation vs. physical model test vol.13, pp.3, 2018, https://doi.org/10.1080/17445302.2017.1368123
  2. Spud-can penetration depending on soil properties: Comparison between numerical simulation and physical model test vol.7, pp.2, 2015, https://doi.org/10.12989/ose.2017.7.2.107