Abstract

For the geotechnical analysis in the construction and Deign of the coastal structures, one of the most important factors is the existence of waves. The dynamic behavior and deformation of the seabed subjected to wave load must be considered. It is expected that the soil behavior in the seabed subjected to cyclic wave load is much different from that on the ground subjected to dynamic forces such as earthquake. The purposes of this study are as follows ; Firstly, to provide a testing method to generate wave loads in the laboratory and measuring oscillatory pore water pressures in the unsaturated marine silty sand specimen, Secondly, to analyze the mechanism of wave induced pore water pressures and liquefaction potentials under the conditions in the testing. It is shown that the test set-up manufactured especially for the test is good to generate oscillatory wave pressures to the specimen with sine wave type. From the results of this study, it is understood that the pore water pressure due to induced waves is not accumulated as the wave number increases but is periodically varied with wave passage on still water surface. The magnitude of pore water pressures measured tends to be diminished radically with a certain time lag under the action of both high and low waves as depth increases.

주제어

#파랑하중   #간극수압   #불포화토   #해저지반   #액상화   #밀도화  

참고문헌 (15)

1. Liquefaction Potential at Ekofisk Tank in North Sea , Lee,K.L.;J.A.Focht , J. of the Geotechnical Engineering Div. / v.93,pp.47-70, 1967
   
2. Wave Induced Pressures in Beds of Sand , Sleeth,J.F.A. , J. of Hydraul. Div. / v.96,pp.367-378, 1970
   
3. 海底地盤の波浪の液狀化およぴ變形機構 , 善功企;山崎浩之;渡邊篤 , 海洋構 造物の基礎に關する Symposium, 第2篇 Symposium 論文集 / v.,pp.241-248, 1986
   
4. Evaluation of Wave-induced Pore Pressure in Sand layer by Wave Steepness , Maenoi,Y.;T.Hasegawa , Coastal Engineering in Japan / v.28,pp.31-44, 1985
   
5. Loss of Wave Energy Due to Percolation in a Permeable Sea Bottom , Putnam,J.A. , Trans. Am. Geoghy. Un. / v.30,pp.662-666, 1949
   
6. 불포화토의 거동 예측을 위한 구성식의 개발 , 송창섭 , 서울대학교 박사학위논문 / v.,pp., 1994
   
7. Wave Induced Pore Pressures and Liquefaction in Seabed , Zen,K.;H.Yamazaki , Toshitokiso / v.37,pp.63-68, 1989
   
8. On the Response of a Poro-Elastic Bed to Water Waves , Yamamoto,T.(et al.) , J. of Fluid Mech. / v.87,pp.193-206, 1978
   
9. Effect of gas Bubbles on the Seabed Behaviour , Nageswaran,S. , D. Phil. Thesis, Oxford University / v.,pp., 1983
   
10. 불포화토의 재성형과 압밀특성 , 손영환 , 서울대학교 석사학위논문 / v.,pp., 1995
    
11. Wave-Induced Pore Pressures and Effective Stresses in a Porous Bed , Madsen,O.S. , Geotechnique / v.28,pp.377-393, 1978
    
12. Wave Induced Stresses in Unsaturated Submarine Sediments , Okusa,S. , Geotechnique / v.35,pp.517-532, 1985
    
13. Consolidation of Unsaturated Soils Including Swelling and Collapse Behaviour , Lloret,A.;E.E.Alonso , Geotchnique / v.30,pp.449-447, 1980
    
14. 농림수산부;농어촌진흥공사 , 새만금지구 방조제 단면 및 기초 처리에 관한 설계 검토 / v.,pp., 1990
    
15. 海底地盤の波浪の液狀化およぴ高密度化 , 善功企;山崎浩之;渡邊篤 , 港灣技 硏報告 / v.26,pp.125-180, 1987
    

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