파랑하중에 의한 해저지반의 공극수압 변화에 대한 연구

An Experimental Study on the Variation of Pore Water Pressures in the Seabed Subjected to Waves

  • 발행 : 1996.10.01

초록

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.

키워드

참고문헌

  1. J. of the Geotechnical Engineering Div. v.93 no.SM1 Liquefaction Potential at Ekofisk Tank in North Sea Lee,K.L.;J.A.Focht
  2. Geotchnique v.30 no.4 Consolidation of Unsaturated Soils Including Swelling and Collapse Behaviour Lloret,A.;E.E.Alonso
  3. Geotechnique v.28 no.4 Wave-Induced Pore Pressures and Effective Stresses in a Porous Bed Madsen,O.S.
  4. Coastal Engineering in Japan v.28 Evaluation of Wave-induced Pore Pressure in Sand layer by Wave Steepness Maenoi,Y.;T.Hasegawa
  5. D. Phil. Thesis, Oxford University Effect of gas Bubbles on the Seabed Behaviour Nageswaran,S.
  6. Geotechnique v.35 no.4 Wave Induced Stresses in Unsaturated Submarine Sediments Okusa,S.
  7. Trans. Am. Geoghy. Un. v.30 Loss of Wave Energy Due to Percolation in a Permeable Sea Bottom Putnam,J.A.
  8. J. of Hydraul. Div. v.96 no.HY2 Wave Induced Pressures in Beds of Sand Sleeth,J.F.A.
  9. J. of Fluid Mech. v.87 no.1 On the Response of a Poro-Elastic Bed to Water Waves Yamamoto,T.(et al.)
  10. Toshitokiso v.37 no.6 Wave Induced Pore Pressures and Liquefaction in Seabed Zen,K.;H.Yamazaki
  11. 海洋構 造物の基礎に關する Symposium, 第2篇 Symposium 論文集 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
  12. 港灣技 硏報告 v.26 no.4 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
  13. 새만금지구 방조제 단면 및 기초 처리에 관한 설계 검토 농림수산부;농어촌진흥공사
  14. 서울대학교 석사학위논문 불포화토의 재성형과 압밀특성 손영환
  15. 서울대학교 박사학위논문 불포화토의 거동 예측을 위한 구성식의 개발 송창섭