Abstract

Detailed investigations were carried out on the stability of the dredged soil bed against wave actions, aimedat establishing the design method of artificial tidal flats using dredged soil. The soil was dredged at Nagoya port, Japan, and has a mean grain size of 0.013mm. Basic features of artificial dredged soil bed against wave actions were explained from a series of model experiments in a wave flume. The two types of section shapes were employed; one is a horizontal bed and the other is a sloped one. Changes of the bed profile, shear strength, grain size distribution and water content, according to the wave actions, were measured in detail. The cumulative effect of the wave actions, over about one week, was investigated. A dredged soil bed moves withthe wave actions with relatively small wave height. It should be especially. noted that the clay component is dissolved and flown out, away from the surface layer, and consequently the surface layer hardens, as if it is covered with sand. Wren the wave height is gradually increased, the bed is not liquefied and the shear strength of the dredged bed is increased by a wave-induced dissipation of pore pressures in the bed and a decrease of clay component by the wave-induced leakage.

주제어

#준설점토   #파랑의 반복작용   #액상화   #수리모형실험   #내파안정성   #인공갯벌  

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참고문헌 (8)

1. 한국수자원공사. '시화호 갈대습지공원V', http://www.kowaco. or.kr/ 
2. Matui, T, Ohara, H. and Ito, T. (1980). 'Cyclic stress-strain history and shear characteristics of clay', J. Geotechnical Engineering Division, ASCE, Vol 106, No 3, pp 1101-1120 
3. Tsuchida, T. and Gomyo, M. (1999). 'On the Stability of seabed under the Cyclic Pressure Change due to Waves', Annual J. of Castal Engineering, JSCE, Vol 46, pp 596-600(in Japanese) 
4. Zen, K. and Yamazaki, H. (1990a). 'Mechanism of wave-induced liquefaction and densification in seabed', Soils and Foundations, Vol 30, No 4, pp 90-104 
5. Zen, K. and Yamazaki, H. (1990b). 'Oscillatory pore pressure and liquefaction in seabed induced by ocean waves', Soils and Foundations, Vol 30, No 4, pp 147-161 
6. WAVE (2001). 'Introduction, Guideline for the conservation and creation of ecosystems in relation to coastal development', Vol 1, Waterfront Vitalization and Environment Research Center, Tokyo, Japan, 117p 
7. Kang, Y.K., Takahashi, S., Okudaira, A. and Kuroda, T. (2001). 'Field Survey on Natural and Artificial Tidal Flats -Stability of Foreshore Tidal Flats against Wave Actions-, Technical Note of the Port and Harbour Res. Inst., Ministry of Land, Infrastructure and Transport, Japan, No 1011, 78p(in Japanese) 
8. Yamazaki, H., Zen, K., Kagaya, H. and Tachishita, T. (1991). 'Strength and deformation characteristics of clays due to cyclic loading', Rep. of the Port and Harbour Res. Inst., Ministry of Land, Infrastructure and Transport, Japan, Vol 30, No 4, pp 65-83(in Japanese) 

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