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標題: 斜面海堤上之波流場變化及堤趾沖刷研究
A Numerical Study on Wave Variation and Toe Scouring at Sloping Seawalls
作者: 周傳傑
Chou, Chuan-Chieh
關鍵字: 斜面海堤;Toe Scouring;波流場變化;堤趾沖刷;Seawalls
出版社: 土木工程學系所
引用: 橋本宏、田中茂信、筒井保博(1983),「緩傾斜堤之局部絕對海岸漂沙之影響」第三十回海岸工學講演會論文集,249-253頁。 蔡清標、張百欣(1996),「粗糙海堤面對堤趾沖刷之影響」,台灣水利,第44期,第4卷,47-60頁。 簡仲和、黃俊維、江金德(1996),「不規則波作用下海堤堤趾沖淤特性之初步研究」,第二十五屆海洋工程研討會論文集,421-428頁。 蔡清標、余建宏、陳宏彬(2003),「碎波作用下堤趾沖淤特性之實驗研究」,第二十五屆海洋工程研討會論文集,475-482頁。 陳鴻彬、蔡清標、陳文喜、游永傑(2003),「碎波作用下斜面及階梯海堤之堤趾沖刷研究」,中國海事商業專科學校學報,17-46頁。 Eckert, J. W., (1983). Design of toe protection for coastal structures. Proc. Coastal Structures ''83, ASCE, pp ,331-341. Fowler, J. E., (1992). Scour problems and methods for prediction of maximum scour at vertical seawalls. Technical Report. No.CERC-92-16, U.S. Army Corps of Engineers, Waterways Experiment Station,Vicksburg, Miss. Gao, X. and Inouchi, K., (1998). The characteristics of scouring and depositing in front of vertical breakwaters by broken clapotis. Coastal Eng., 40,99-113. Hales, L. Z., (1980). Erosion control of scour during construction: Report 2. Literature survey of theoretical, experimental, and prototype investigations. Technical Rep. HL-80-3, U.S. Army Corps of Engineers, Waterways Experiment Station, Vicksburg, Miss. Herbich, J. B., (1991). Scour around pipelines, piles, and seawalls. Handbook of Coastal and Ocean Engineering, (J. B. Herbich, ed.), Gulf Pub., 867–958 Herbich, J. B. and Ko, S. C., (1968). Scour of sand beaches in front of seawalls. Proc. 11th Inter. Conf. on Coastal Engineering, ASCE, pp. 622-643 Hughes, S. A. and Fowler, J. E., (1991). Wave-induced scour prediction at vertical walls. Proc. Coastal Sediments ''91, ASCE, pp. 1886-1899. Irie, I. and Nadaoka, K., (1984). Laboratory reproduction of seabed scour in front of breakwaters. Proc., 19th Inter. Conf. on Coastal Engineering, ASCE, pp , 1715-1731. Markle, D. G., (1989). Stability of toe berm armour stone and toe buttressing stone on rubble-mound breakwater and jetties. Technical Rep. REMR-CO-12, U.S. Army Corps of Engineers, WEaterways Experiment Station, Vicksburg, Miss. O''Donoghue, T. (2001). N-type sediment bed reponse under standing wave. J. Waterway, Port, Coastal, Ocean Eng., 1274,245-248 Oumeraci, H., (1994). Scour in front of vertical breakwaters-Review of problems. Proc., Int. Workshop on Wave Barriers in Deep Water, Port and Harbor Research Institute, Yokosuka, Japan, 281-307. Powell, K. A. and Lowe, J. P., (1994). The scouring of sediments at the toe of seawalls. Proc., Hornafjordur Int. Coastal Symp., 749-755. Sawaragi, T., (1966). Scouring due to wave action at the toe of permeable coastal structure. Proc., 10th Int. Conf. on Coastal Engineering, ASCE, pp, 1036-1047. Silvester, R. and Hsu, J. R. C., (1997). Coastal Stabilization, World Scientific, Singapore. Sumer, B. M. and Fredsoe, J., (2000). Experimental study of 2D scour and its protection at a rubble-mound breakwater. Coastal Eng., 40: 59-87. Sutherland, J., Brampton, A., Motyka, G., Blanco, B., and Whitehouse, R., (2003). Beach lowering in front of coastal structures. Research Scoping Study Rep. No.FD1916/TRl. (http://sciencesearch,defra. 4, 2006.20) Sutherland, J., Obhrai, C., Whitehouse, R. J. S., and Pearce, A. M. C., (2006). Laboratory tests of scour at a seawall. Proc. 3rd Inter. Conf. on Scour and Erosion CD-ROM. Tsai, C. P., Wang, J. S., and Lin, C., (1998). Down-rush flow waves on sloping seawalls. Ocean Eng., 25: 295-308. Tsai, C.P., Chen, H.B., and You, S.S., (2009). Toe scour of seawall on a steep seabed by breaking waves. Waterway, Port, Coastal, and Ocean Engineering, ASCE/61. Twu, S. W., and Liao, W. M., (1999). Effects of seawall slopes on scour depth. J. Coastal Res., 15:985-990. Xie, S. L., (1981). Scouring patterns in front of vertical breakwaters and their influence on the stability of the foundations of the breakwaters. Rep., Dept. of Civil Engineering, Delft Univ. of Technology, Delft, The Netherlands.

In order to investigate the mechanism of toe scour, we used the numerical method to simulate the wave characteristics and the toe scour phenomenon caused by waves acting on a sloping seawall. Refer to the previous studies, the bed of slope 1/5 and the seawall of slope 1/1.5 were considered in the simulations. The plunging wave and null-breaking wave were conducted respectively. The simulated results show that: (1) the plunging wave will induce strong down-rush flow and obvious vortex to the toe, and cause significant scour phenomenon. (2) the null-breaking wave cannot induce the down-rush flow and any obvious vortex affect to the toe, and there is no significant scouring phenomenon happen on the sandy bed. Based on the results, we conclude that the obvious toe vortex and the down-rush flow to the toe is highly relative to the toe scour .
其他識別: U0005-2608201301135800
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