Analysis of Scour around a Group of Vertical Piles in the Field
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 126, Issue 4
Abstract
A study of the scour around a group of piles in the field exposed to oscillatory waves was carried out. The main purpose was to derive simple predictive formulas for the geometric properties of the scour hole in terms of nondimensional parameters describing the flow, sediment, and pile characteristics. A comprehensive data set from the Pacific coast of Japan was employed where the beach profile along a pier experiencing scour around its piles was surveyed every week. Detailed wave measurements were available, and only the outer piles exposed to nonbreaking (oscillatory) waves were investigated. The maximum scour depth showed a distinct correlation with the Keulegan-Carpenter number, and an empirical relationship was derived that agreed with some earlier laboratory experiments, if an equivalent diameter was defined for the pile groups. The width of the scour hole displayed little correlation with the Keulegan-Carpenter or other nondimensional numbers employed, although it should be noted that only one pile configuration was investigated in the present study.
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References
1.
Bayram, A. (1997). “Local scour around Iwakioki and Agaoki offshore platforms.” Rep., M.R.T. Consulting Co., Tokyo.
2.
Breusers, H. N. C., Nicollet, G., and Shen, H. W. (1977). “Local scour around cylindrical piers.”J. Hydr. Res., Delft, The Netherlands, 15(3), 211–252.
3.
Chow, W. Y., and Herbich, J. B. (1978). “Scour around a group of piles.” Proc., Offshore Technol. Conf.
4.
Dean, R. G. (1977). “Equilibrium beach profiles: US Atlantic and Gulf coasts.” Oc. Engrg. Rep. No. 12, Dept. of Civ. Engrg., University of Delaware, Newark.
5.
Eadie, R. W., and Herbich, J. B. (1986). “Scour about a single, cylindrical pile due to combined random waves and current.” Proc., 20th Coast. Engrg. Conf., ASCE, New York, 1858–1870.
6.
Herbich, J. B. ( 1991). “Scour around pipelines, piles, and seawalls.” Handbook of coastal and ocean engineering. J. B. Herbich, ed., Vol. 2, Gulf Publishing Co., Book Div., Houston.
7.
Hotta, S., and Mizuguchi, M. (1980). “A field study of waves in the surf zone.” Coast. Engrg. in Japan, Tokyo, 23, 59–81.
8.
Kobayashi, T., and Oda, K. (1994). “Experimental study on developing process of local scour around a vertical cylinder.” Proc., 24th Coast. Engrg. Conf., ASCE, New York, 1284–1297.
9.
Melville, B. W. (1975). “Local scour at bridge sites.” Rep. No. 117, Dept. of Civ. Engrg., University of Auckland, Auckland, New Zealand.
10.
Palmer, H. D. (1969). “Wave induced scour on the sea floor.” Proc., Civ. Engrg. in the Oc., ASCE, New York, 703–716.
11.
Sheppard, D. M., and Albada, E. (1998). “Local scour under tidal flow conditions.” Proc., Int. Water Resour. Engrg. Conf. and Mini-Symp.
12.
Sheppard, D. M., Copps, T. H., and Zhao, G. (1995). “Local scour near multiple pile piers in steady currents.” Proc., 1st Hydr. Engrg. Conf.
13.
Sheppard, D. M., and Jones, J. S. (1998). “Scour at complex pier geometries.” Proc., Int. Water Resour. Engrg. Conf. and Mini-Symp.
14.
Sumer, B. M., Christiansen, N., and Fredsøe, J. (1992a). “Time scale of scour around a vertical pile.” Proc., 2nd Int. Offshore and Polar Engrg. Conf., Vol. 3, 308–315.
15.
Sumer, B. M., and Fredsøe, J. (1998). “Wave scour around group of vertical piles.”J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 124(5), 248–256.
16.
Sumer, B. M., Fredsøe, J., and Christiansen, N. (1992b). “Scour around a vertical pile in waves.”J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 118(1), 15–31.
17.
Uda, T., and Sakai, Y. ( 1985). “Summarised data of beach profiles and wave observations at Ajigaura Beach.” Tech. Memo. of PWRI No. 2294, Coast. Engrg. Div., River Dept., Public Works Research Institute, Ministry of Construction, Japan.
18.
Uda, T., Ito, H., and Saito, T. ( 1990). “Summarised data of beach profiles and wave observations at Ajigaura Beach (2).” Tech. Mem. of PWRI No. 2900, Coast. Engrg. Div., River Dept., Public Works Research Institute, Ministry of Construction, Japan.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 126 • Issue 4 • July 2000
Pages: 215 - 220
History
Received: Nov 28, 1998
Published online: Jul 1, 2000
Published in print: Jul 2000
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