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Parameter Analysis for Influence on the Scour Width around Submarine Pipelines in Waves  

Oh, Hyoun-Sik (Department of Civil Engineering, Chungbuk National University)
Kim, Kyoung-Ho (Department of Civil Engineering, Chungbuk National University)
Son, Kwang-Sik (Department of Civil Engineering, Chungbuk National University)
Kim, Heung-Guk (Department of Civil Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.21, no.6, 2009 , pp. 470-479 More about this Journal
Abstract
The local scour in waves can be thought of as very complex synthetic processes which is influenced by geology of bed material, bed flow in the sea and hydraulics condition. The most research until now be targeted at the scour depth and therefore the local scour width in waves has not been investigated as well. The size of wave or bottom velocity at the bed is direct cause of the local scour among lots of the scour effect factors, and the scour depth and width can be estimated through interrelationship analysis with scour area to use the dimensionless parameters including these such as Keulegan-Carpenter number, Ursell number etc. In this paper, to find out closely relation with the dimensionless parameters and scour width, performed an experiment with the variations of pipe diameters, wave heights and wave periods and then analyzed it. As the result, while Reynolds number and period parameter were seen to disperse local scour width largely, Shields number, KC number and Ursell number appeared good interrelationship. Specially, Shields number doesn't much affect the scour depth but has good relation for the scour width.
Keywords
local scour; relative width; Keulegan-Carpenter number; Ursell number; nonlinear regression analysis;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Yuksel, Y., Ath, V. and Cevik, E. (1995). Flow Field along a flat surface with a parallel placed cylinder, Proc., 5th Int. Offshore and Polar Engrg. Conf., International Society of Offshore and Pollar Engineering, Golden, Colo., pp. 157-170
2 Chiew, Y. M. et al. (1993). Effect of Spoilers on Wave-Induced Scour at Sub-marine pipeline, Journal of Waterway, port, Coastal, and Ocean Engineering, ASCE, Vol. 119, No 4
3 Klomp, W.H.G., Hansen, E.A., Chen, Z., Bijker, R. and Bryndum, M.B. (1995). Pipeline seabed interaction, free span development, The international Society of Offshore and Polar Engineers, The Gague, Netherlands
4 Herbich, J.B. (1981). Scour around Pipelines and Other Objects, Offshore Pipeline Design Elements, Marcel Dekker Inc., New York., pp. 43-96
5 Smer and Fredse. (1990). Scour Below Pipelines in Waves, Journal of waterway, port Coastal, and Ocean Engineering, ASCE, Vol. 116, No.3, May/June
6 Yuksel, Y. and Narayanan, R. (1994). Wave Forces on Horizontal Cylinder Resting on Sloping Bottom, Proceedings of 4th International Offshore and Polar Engineering Conference, Vol. 2, pp. 85-92
7 Kjeldsen, S.P., et al. (1973). Local scour near offshore pipelines, Proc. Sec-ond Int. Port and Ocean Engrg. under Arctic conditions Conf., pp. 308-331
8 Sumer, B.M., Mao, Y. and Fredsoe, J. (1988). Interaction between vibrating pipe and erodible bed, J. Wtrway., Port, Coast. and Oc. Engrg., ASCE, 144(1), pp. 81-92
9 Sumer, B.M. and Fredsoe, J. (2001). Scour Around Pile In Combined Waves and Currents, Journal of Hydraulic Engineering, May, pp. 403-411
10 Lucassen, R.J. (1984). Scour underneath submarine pipelines, Report No. PL- 42A, Netherlands Marine Tech. Res., Netherlands Industrial Council for Oceanology, Delft University of Technolty, Delft, the Netherlands, Sep. 1984. Student Thesis supervised by E. W. Bijker and W. Leeuwenstein
11 Esin Cevik and Yal in Yüksel. (1999). Scour under Submarine Pipelines in Waves in Shoaling Conditions, Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 125, No. 1
12 김경호, 김홍훈, 오현식, 연주흠 (2005). 파랑에 의한 해저 매설관로 주변의 국부세굴 특성, 한국해안해양공학회지, 제17권 제 2호, pp. 106-118
13 오현식, 이호진, 김경호 (2002). 파에 의한 해저관로의 국부세굴 특성, 대한토목학회논문집, 제 22권 제 4-B호, pp.539-549
14 Sumer, B.M., Truelsen, C., Shchmann, T. and Fredoe, J. (2001). Onset of scour below pipelines and self-burial, An International Journal for coastal, Harbour and Offshore Engineers., pp. 313-335