人工魚礁地盤의 液狀化 豫測方法

Liquefaction estimate mothod of artificial fish reef foundation

This paper describes the method to estimate analytically liquefaction for the purpose of the enhancement of artificial fish reefs stability under the consideration of wave conditions as well as soil propertise of seabed. The main results are as follows : 1) The stability of artificial fish reefs is closely related to the seabed liquefaction. 2) Effects of propagation coefficient(α) and drainage coefficient (C) on seabed liquefaction were remarkable. The seabed was more easily liquefied as the propagation coefficient (α) increases because of the difficulty of water pressure propagation toward the seabed while it was more difficult to be liquefied as the drainage coefficient(C) increases because of easy drainage. 3) Not to occur the liquefaction phenomena when the wave height H increase, the water depth should be increased. The amplitude of water pressure, Pₒ, is becoming larger with wave height and then the larger Pₒ is, the easier the liquefaction occurs. 4) Considering items of artificial fish reefs, seabed and wave characteristics, some techniques to find whether the liquefaction occurs or where the liquefaction occurs were analytically suggested at Fig. 7.